seamless steel pipe – Supplier of Quality Forged Fittings-Flanges

Seamless vs Welded Pipe

Z0065c — Fri, 29 Aug 2025 02:00:00 +0000

In modern industry, steel pipes serve as a vital construction and manufacturing material, widely applied across various fields. Whether in pipeline systems for fluid transportation or in mechanical components and engineering structures, steel pipes play a crucial role. Based on production processes, steel pipes are primarily categorized into two types: seamless steel pipes and welded steel pipes.

If you are looking for suppliers of seamless and welded pipes, please contact us

What Are Steel Pipes?

Steel pipes are hollow, elongated steel products primarily used for conveying fluids (such as petroleum, natural gas, water, gas, steam, etc.) and also for manufacturing mechanical components and engineering structures. Due to their lightweight yet high-strength properties, they have replaced traditional solid steel in many applications, becoming the material of choice. Additionally, steel pipes are commonly used in the production of various conventional weapons, such as gun barrels and artillery shells.

Manufacturing Process

Seamless Steel Pipe:

Produced by piercing a solid tube blank or steel ingot, followed by hot rolling, cold rolling, or cold drawing. Throughout this process, no weld seam forms inside the pipe, hence the name “seamless.”

Hot Rolling: A solid round billet is heated and pierced, then rolled and elongated through a series of rolling mills until the desired dimensions and wall thickness are achieved.

Cold Drawing / Cold Rolling: Based on the hot-rolled pipe, cold drawing or cold rolling is used to further reduce the diameter and wall thickness while improving dimensional accuracy and surface finish.

Welded Pipe:

Welded pipes are typically made from stainless steel plates or strips that are cold-formed into a cylindrical shape and then welded. The main welding methods include:

TIG Welding: Uses a tungsten electrode and an inert gas shield to weld the edges of the plate. It produces high-quality welds and is often used for pipes with strict quality requirements.

Laser Welding: Uses a high-energy-density laser beam for welding. It offers fast welding speed and a small heat-affected zone.

Plasma Welding: Falls between TIG and laser welding in terms of energy density. It is suitable for thicker materials.

Resistance Welding (ERW – Electric Resistance Welding): Heats the edges using electrical current until they fuse together. It is highly efficient but may produce welds of lower quality compared to TIG welding.

Characteristics of Seamless Steel Pipes

1. High Pressure Resistance: With no welded seams, seamless steel pipes feature a more uniform overall structure, granting them superior pressure resistance. They are suitable for use in harsh environments involving high pressure and high temperatures.

2. High Precision: Seamless steel pipes feature smooth inner and outer walls with high dimensional accuracy, making them suitable for applications demanding low fluid resistance and precise flow control.

3. Excellent Corrosion Resistance: Seamless steel pipes can utilize specialized materials and surface treatment technologies to enhance corrosion resistance and extend service life.

Characteristics of Welded Pipes

1. High Production Efficiency: The relatively simple production process of welded pipes enables continuous and automated manufacturing, significantly boosting production efficiency.

2. Lower Cost: Due to their straightforward production method and high material utilization, welded pipes offer relatively low costs, making them suitable for high-volume, low-cost applications.

3. Diverse Specifications: Welded pipes can be produced in various diameters, wall thicknesses, and lengths to meet diverse engineering requirements.

Structural Strength

Due to differences in manufacturing processes, the structural strength and risk resistance of the two materials are fundamentally distinct, serving as the core basis for selection in industrial applications.

Seamless Steel Pipe:

Lacking welded seams, seamless steel pipes feature a continuous and complete metallic structure. When subjected to pressure, impact, or high temperatures, stress is evenly distributed across the entire pipe wall. This prevents localized fractures caused by material variations at welds or welding defects such as incomplete fusion or porosity.

Welded pipes

The strength of welded pipes is directly influenced by weld quality: if welding processes meet standards, weld strength can approach that of the base material. However, if processes are substandard, defects like slag inclusions or cracks may form at the weld, creating “structural weaknesses.” Under high pressure, low temperatures, or frequent vibration, these welds are more prone to failure.

Application Areas

Seamless Steel Pipes:

High-Pressure and Critical Applications: The preferred choice for high-pressure, high-temperature, and high-strength environments such as oil and gas transmission, high-pressure boilers, chemical equipment, hydraulic systems, and nuclear power plants. In these applications, safety is paramount, and seamless tubes offer unmatched reliability.

Applications Demanding Consistency: Precision machinery structures, aerospace, and other scenarios with stringent requirements for pipe strength and reliability.

Welded Pipes:

Low-Pressure and General-Purpose Applications: Widely used for conveying low-pressure fluids like water, gas, and air. Their cost advantage and flexible sizing make them ideal for construction, structural engineering, furniture manufacturing, sports equipment, and similar fields.

Large-Diameter Projects: Long-distance oil and gas pipelines (especially spiral welded pipes), urban water supply and drainage networks, and other projects requiring large diameters and extended lengths.

Performance Characteristics

Seamless steel pipes, lacking welded seams, generally exhibit superior pressure-bearing capacity and are suitable for demanding environments such as high-pressure and high-temperature applications. Additionally, seamless steel pipes offer relatively higher precision and surface smoothness, making them ideal for scenarios with stringent performance requirements.

Welded pipes: Although their pressure-bearing capacity is slightly lower than seamless steel pipes, they are more cost-effective and offer greater convenience in processing and installation.

Surface Quality

Seamless steel pipes undergo high-temperature hot rolling, forming a layer of iron oxide scale on the surface that affects smoothness. For high-precision surfaces, additional post-processing such as cold drawing and polishing is required.

The raw material steel strip for welded pipes has a smooth surface. After forming, the weld seam undergoes treatment, resulting in inner and outer surfaces that are typically flatter and smoother than seamless pipes.

Corrosion Resistance

Seamless steel pipes possess superior corrosion resistance due to their monolithic structure, which eliminates potential hazards like intergranular corrosion in weld zones caused by heat-affected zones.

The weld zones of welded pipes undergo microstructural changes during high-temperature welding, making them more susceptible to corrosion initiation. In certain specialized media or environments, welds may corrode earlier than the base material.

How to Choose Between Seamless and Welded Pipes

1. Consider the operating environment: First, select the appropriate pipe material based on the project’s environmental conditions and usage requirements. For instance, in high-temperature, high-pressure, or corrosive environments, seamless steel pipes should be prioritized; whereas in general construction or low-pressure transportation applications, welded pipes offer an economical and practical choice.

2. Pay Attention to Pipe Specifications: Select appropriate pipe specifications based on project requirements. Both welded and seamless pipes offer multiple specifications, including diameter, wall thickness, and length.

3. Focus on Material Quality: When selecting pipes, pay attention to material indicators such as chemical composition, mechanical properties, and corrosion resistance to ensure compliance with relevant standards and specifications.

4. Consider Cost Factors: While meeting project requirements, cost considerations are also important. Generally, welded pipes have lower production costs and are relatively inexpensive, whereas seamless steel pipes involve more complex manufacturing processes and thus carry higher costs.

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EN10216-2 Seamless Tubes

Z0065c — Wed, 27 Aug 2025 02:00:00 +0000

A long-standing Singaporean client, whom we have been working with since 2022, has sent an inquiry for European standard steel tubes, including EN10216-2 seamless tubes of 13CrMo4-5, P235GH, and P265GH, intended for the Singapore IWMF project. This client has maintained a strong relationship with us over the years and regularly purchases large quantities of steel tubes and pipe fittings from our company.

One month later, the client informed us of the good news that they had successfully won the bid.

As with previous orders, before production, we provided drawings for the client’s review. Prior to delivery, we submitted an EN10204 3.1 MTC, product photos, packaging photos, and spectrogram photos for the client’s approval before arranging shipment.

If you want to know more about EN10216-2 steel tube, please click here

If you have any questions about our products or need new services, please feel free to contact us. We will be happy to provide you with professional service.

EN 10216 Standard Overview

EN 10216 is the general standard for seamless tubes for pressure purposes within the European Union. It comprises five parts covering the technical and manufacturing conditions for seamless steel tubes for various applications. Specifically, EN 10216-2 applies to non-alloy and alloy seamless steel tubes with specified high-temperature properties. It details comprehensive requirements for these tubes when used in high-temperature environments, including chemical composition, mechanical properties, and manufacturing processes. Each part provides a detailed list of specific steel grades within its category, including upper and lower limits for chemical composition, mechanical property specifications (at room temperature and elevated temperatures), heat treatment conditions, and specific inspection requirements.

Product List

Item	Material	Item Details	Size	Thk (mm)	Qty	Unit
1	13CrMo4-5/1.7335	SEAMLESS PIPES BE × 6MTR	DN200	6.0	264	M
2	P235GH/1.0345	SEAMLESS PIPES BE × 6MTR	DN40	2.6	6	M
3	P265GH/1.0425	SEAMLESS PIPES BE × 6MTR	DN15	3.2	48	M
4	P265GH/1.0425	SEAMLESS PIPES BE × 6MTR	DN20	3.0	6	M
5	P265GH/1.0425	SEAMLESS PIPES BE × 6MTR	DN250	6.3	216	M
6	P265GH/1.0425	SEAMLESS PIPES BE × 6MTR	DN150	5.0	294	M
7	P265GH/1.0425	SEAMLESS PIPES BE × 6MTR	DN300	6.0	102	M
8	P235GH/1.0345	SEAMLESS PIPES BE × 6MTR	DN15	2.0	486	M
9	P235GH/1.0345	SEAMLESS PIPES BE × 6MTR	DN20	3.0	18	M
10	P235GH/1.0345	SEAMLESS PIPES BE × 6MTR	DN80	4.0	396	M
11	P235GH/1.0345	SEAMLESS PIPES BE × 6MTR	DN125	4.0	318	M
12	P235GH/1.0345	SEAMLESS PIPES BE × 6MTR	DN200	6.0	456	M

Dimension Inspection of European Standard Carbon Steel Tubes

Outer Diameter

Use calipers, outside micrometers, or dedicated ring gauges to ensure outer diameter tolerances comply with relevant standards.

Wall Thickness

Employ micrometers or ultrasonic thickness gauges to perform multi-point measurements along both the circumferential and longitudinal directions, verifying wall thickness uniformity and deviations.

Length Inspection

Use steel tape measures or measuring tools to verify that fixed-length or multiple-length specifications meet standards and customer requirements.

Packaging of EN10216-2 Seamless Tubes

Bundled Packaging

Steel tubes are typically bundled by identical specifications, secured with steel strapping or wire to prevent dispersion during transit. Additionally, we cover the tubes with waterproof tarps to shield them from rain or seawater exposure en route.

End Protection

Plastic caps are often fitted to pipe ends to shield them from impacts during transit that could affect customer usage. This also prevents dust, moisture, or mechanical damage from entering the tubes, maintaining cleanliness and integrity.

Surface Protection

The outer surface is coated with rust-preventive oil, black paint, or treated with a galvanized layer to enhance corrosion resistance and prevent rusting during transport.

Labeling and Identification

Each bundle of steel tubes is accompanied by a tag indicating the manufacturer, steel grade, specifications, standards, furnace number, or batch number.

Special Packaging

For export, packaging can be customized per customer requirements using wooden crates, wooden pallets, or waterproof tarps to enhance moisture resistance and impact protection, suitable for maritime or long-distance transport.

Chemical Composition Inspection

Spectral analysis of steel tubes per EN 10216-2 is a critical step for analyzing and verifying chemical composition, ensuring the pipe material meets standard requirements and customer-specified steel grades. This inspection typically employs an optical emission spectrometer (OES) or a portable spectrometer for testing.

Following production completion, we conduct spectral analysis on all products to verify that the chemical composition of the steel tubes (including C, Mn, Si, P, S, Cr, Mo, Ni, etc.) meets the requirements of EN 10216-2 and the corresponding steel grades (e.g., P235GH, 16Mo3, 13CrMo4-5, etc.). This ensures the tubes maintain reliable strength, toughness, and corrosion resistance under high-temperature and high-pressure operating conditions.

Chemical Composition of EN10216-2 Seamless Tubes

Steel grades	C% max	Si% max	Mn% max	P% max	S% max	Cr% max	Mo% max	Ni% max	Al.cał% min	Cu% max	Nb% max	Ti% max	V% max	Cr+ Cu+ Mo+ Ni% MAX
P195GH	0.13	0.35	0.7	0.025	0.02	0.3	0.08	0.3	≥ 0.020	0.3	0.01	0.04	0.02	0.7
P235GH	0.16	0.35	1,20	0.025	0.02	0.3	0.08	0.3	≥ 0.020	0.3	0.01	0.04	0.02	0.7
P265GH	0.2	0.4	1,40	0.025	0.02	0.3	0.08	0.3	≥ 0.020	0.3	0.01	0.04	0.02	0.7
16Mo3	0.12- 0.20	0.35	0.40- 0.70	0.025	0.02	0.3	0.25- 0.35	0.3	≥ 0.020	0.3	–	–	–	–
14MoV6-3	0.10- 0.15	0.15- 0.35	0.40- 0.70	0.025	0.02	0.30- 0.60	0.50- 0.70	0.3	≥ 0.020	0.3	–	0.22-0.28	–	–
13CrMo4-5	0.15	0.50- 1,00	0.30- 0.60	0.025	0.02	1,00- 1,50	0.45- 0.65	0.3	≥ 0.020	0.3	–	–	–	–
10CrMo9-10	0.10- 0.17	0.35	0.40- 0.70	0.025	0.02	0.70- 1,15	0.40- 0.60	0.3	≥ 0.020	0.3	–	–	–

Mechanical Properties of EN10216-2 Seamless Tubes

Steel grades	Mechanical properties during tensile testing in room temperature							Resilience
	Upper yield limit or yield strength Re or R0.2 for wall thickness of t min				Tensile strength Rm			Minimum energy average absorbed KVJ at the temperature of 0°C
	T≤16	16	40	60	Tensile strength Rm	Elongation A min%		I		T
	MPa	MPa	MPa	MPa	MPa	I	t	20	0	-10	20	0
P195GH	195	–	–	–	320- 440	27	25	–	40	28	–	27
P235GH	235	225	215	–	360- 500	25	23	–	40	28	–	27
P265GH	265	255	245	–	410- 570	23	21	–	40	28	–	27
16Mo3	280	270	260	–	450- 600	22	20	40	–	–	27	–
14MoV6-3	320	320	310	–	460- 610	20	18	40	–	–	27	–
13CrMo4-5	290	290	280	–	440- 590	22	20	40	–	–	27	–
10CrMo9-10	280	280	270	–	480- 630	22	20	40	–	–	27	–

Tolerances of EN10216 Steel Tube

Tolerances on Outside Diameter and Wall Thickness

Outside Diameter D mm	Tolerances on D	Tolerances on T for a T/D ratio
		≤ 0,025	> 0,025	> 0,050	> 0,10
			≤ 0,050	≤ 0,10
D ≤ 219,1	± 1% or ± 0.5mm	± 12,5% or ± 0.4mm whichever is the greater
D > 219,1	whichever is the greater	± 20%	± 15%	± 12,5%	± 10% a
a For outside diameters D ≥ 355,6 mm it is permitted to exceed the upper wall thickness locally by a further 5% of the wall thickness T

Tolerances on Inside Diameter and Wall Thickness

Tolerances on inside diameter			Tolerances on T for a T/d ratio
d	d min		≤ 0,03	> 0,03	> 0,06	> 0,12
				≤ 0,06	≤ 0,12
± 1% or ± 2 mm whichever is the greater	(+ 2% ,0)or (+ 4 mm,0)	whichever is the greater	± 20%	± 15%	± 12,5%	± 10% a

a For outside diameters D ≥ 355,6 mm it is permitted to exceed the upper wall thickness locally by a further 5% of the wall thickness T

Tolerances on Exact Lengths

Length L	Tolerance on exact length
L ≤ 6000	10
L ≤ 6000	0
6000 < L ≤ 12 000	15
6000 < L ≤ 12 000	0
L > 12 000	+ by agreement
L > 12 000	0

Dimension in mm

EN 10216-2 Seamless Tubes Features

Excellent High-Temperature Resistance: Capable of long-term stable operation under high temperatures and pressures, suitable for boilers and steam systems.

High Strength and Good Toughness: Exhibits superior mechanical properties after heat treatment, capable of withstanding complex operating conditions.

Comprehensive Specifications: Covers various outer diameters, wall thicknesses, and lengths to meet diverse engineering requirements.

Strict Standards: Manufactured to EN 10216-2 specifications, ensuring excellent interchangeability and international recognition.

Applications

Power Industry: Boiler tubes, superheater tubes, reheater tubes

Oil & Gas: High-temperature transmission pipelines

Chemical Equipment: Pressure vessels, heat exchangers

Machinery Manufacturing: High-temperature mechanical components

Metallurgical Industry: Heat-resistant equipment piping

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ASTM A312 TP316L Seamless Pipe

Z0065c — Tue, 12 Aug 2025 02:00:00 +0000

Last month, we successfully completed an order for ASTM A312 TP316L Seamless Pipe. The customer for this order is one of our long-standing and valued clients, who has been purchasing pipes, fittings, flanges, and other products from us over the past few years. As a result, we have established a strong and reliable partnership with them.

In this collaboration, we strictly adhered to the customer’s specifications, ensuring meticulous attention to detail at every stage of the process—from raw material selection, production and processing, to inspection and packaging. This rigorous approach ensured that the final products met the highest standards of precision in dimensions, surface finish, and performance stability.

The goods were delivered on time and successfully passed the customer’s quality inspection, once again demonstrating our professional expertise and reliable service in the field of stainless steel pipe products. This also lays a solid foundation for deeper and broader cooperation between both parties in the future.

Product Lists

Item	Description of Goods	length	Unit
1	PIPE,316L,30,DN200	0.6	M
2	PIPE,316L,30,DN200	0.6	M
3	PIPE,316L,30,DN200	53.5	M
4	PIPE,316L,30,DN200	0.4	M
5	PIPE,316L,30,DN200	0.6	M
6	PIPE,316L,40S, DN150	24	M

Dimension Inspection of Stainless Steel Seamless Pipes

Outer Diameter (OD): Typically measured using a micrometer, vernier caliper, or ring gauge. During inspection, measurements should be taken at multiple cross-sections and locations along the pipe, with the maximum and minimum values recorded to verify compliance with allowable tolerances and assess ovality.

Wall Thickness: Wall thickness is a critical parameter affecting the pipe’s pressure-bearing capacity. During inspection, measurements are taken using an ultrasonic thickness gauge or micrometer. Typically, measurements are taken at multiple points, such as both ends and the middle of the pipe, to ensure uniform wall thickness and compliance with standards.

Length: Pipe length inspection is typically performed using a steel tape measure or automated length measurement device. For fixed-length pipes, length deviations must be strictly controlled within the standards’ permissible range.

Packaging

End Protection: Plastic caps or rubber sleeves are installed at both ends of the pipe to protect the pipe ends and surfaces from impact damage.

Bundling and Securing: Multiple pipes are bundled together using steel bands, steel wires, or plastic straps. During bundling, protective materials must be placed between the pipes and the bundling straps to prevent the straps from damaging the pipe surfaces.

Wooden Box Construction: Customize sturdy wooden boxes according to the dimensions and quantity of the pipes. The materials used for the wooden boxes must comply with international transportation standards and may require fumigation treatment to meet international quarantine requirements.

What is ASTM A312 TP316L Seamless Pipe?

ASTM A312 TP316L seamless pipe is a type of seamless stainless steel pipe manufactured using TP316L stainless steel material in accordance with the ASTM A312 standard.

ASTM A312: This is the production standard followed by the product, covering austenitic stainless steel seamless pipes, welded pipes, and cold-worked welded pipes for high-temperature and general corrosion-resistant applications.

TP316L: This is an austenitic stainless steel grade, with “L” indicating low carbon (Low carbon). Compared to TP316, it has a lower carbon content, significantly reducing carbide precipitation during welding and lowering the risk of intergranular corrosion, making it particularly suitable for applications requiring welding and use in corrosive environments.

Seamless pipes: Manufactured by piercing solid steel billets, they have no weld seams, ensuring uniform structural integrity and high strength, capable of withstanding high pressures. Compared to welded tubes, seamless tubes typically offer superior dimensional accuracy and surface quality, making them suitable for engineering applications requiring high strength and corrosion resistance.

ASTM A312 TP316L Stainless Steel Pipe Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A312 TP316	MIN						11.00	16.00	2.00
ASTM A312 TP316	MAX	0.080	2.00	0.045	0.030	1.00	14.00	18.00	3.00
ASTM A312 TP316L	MIN						10.00	16.00	2.00
ASTM A312 TP316L	MAX	0.035	2.00	0.045	0.030	1.00	14.00	18.00	3.00

ASTM A312 TP316L Stainless Steel Pipe Mechanical Property

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %
ASTM A312 TP316	515min	205min	35 min
ASTM A312 TP316L	485 min	170 min	35 min

Stainless Steel Pipe Dimension

ASTM A312 TP316L seamless pipe is a general purpose stainless steel pipe used in different industries. Its diameter ranges from 1/8” to 30”, and thickness ranges from SCH 5S to SCH 80S.

Nominal Size		OD	Sch5s		Sch10s		Sch40s		Sch80s
DN	NPS	0	T	kg/m	T	kg/m	T	kg/m	T	kg/m
6	1/8	10.3			1.24	0.28	1.73	0.37	2.41	0.47
8	1/4	13.7			1.65	0.49	2.24	0.63	3.02	0.8
10	3/8	17.1			1.65	0.63	2.31	0.84	3.2	1.1
15	1/2	21.3	1.65	0.82	2.11	1	2.77	1.27	3.73	1.62
20	3/4	26.7	1.65	1.04	2.11	1.28	2.87	1.69	3.91	2.2
25	1	33.4	1.65	1.33	2.77	2.09	3.38	2.5	4.55	3.24
32	1 1/4	42.2	1.65	1.68	2.77	2.7	3.56	3.39	4.85	4.47
40	1 1/2	48.3	1.65	1.95	2.77	3.11	3.68	4.05	5.08	5.41
50	2	60.3	1.65	2.44	2.77	3.93	3.91	5.44	5.54	7.48
65	2 1/2	73.0	2.11	3.77	3.05	5.26	5.16	8.63	7.01	11.41
80	3	88.9	2.11	4.6	3.05	6.45	5.49	11.29	7.62	15.27
90	31/2	101.6	2.11	5.29	3.05	7.4	5.74	13.57	8.08	18.63
100	4	114.3	2.11	5.96	3.05	8.36	6.02	16.07	8.56	22.32
125	5	141.3	2.77	9.67	3.4	11.57	6.55	21.77	9.53	30.97
150	6	168.3	2.77	11.55	3.4	13.48	7.11	28.26	10.97	42.56
200	8	219.1	2.77	15.09	3.76	19.96	8.18	42.55	12.7	64.64
250	10	273.1	3.4	23.08	4.19	27.78	9.27	60.31	12.7	96.01
300	12	323.9	3.96	31.89	4.57	36	9.53	73.88	12.7	132.08
350	14	355.6	3.96	35.06	4.78	41.3
400	16	406.4	4.19	42.41	4.78	47.29
450	18	457.2	4.19	47.77	4.78	53.26
500	20	508	4.78	60.46	5.54	68.61
550	22	558.8	4.78	66.57	5.54	75.53
600	24	609.6	5.54	84.16	6.35	94.45
750	30	762	6.35	120.72	7.92	147.36

Advantages

The core advantages of ASTM A312 TP316L seamless pipes lie in their exceptional corrosion resistance and excellent weldability.

Corrosion Resistance: Due to the addition of molybdenum, TP316L exhibits higher resistance to pitting and crevice corrosion in chloride environments, typically outperforming 304 stainless steel in durability.

Weldability: Its extremely low carbon content allows it to resist intergranular corrosion without requiring post-weld heat treatment, making it particularly suitable for thin-walled pipes that require welding.

High-Pressure Resistance: The manufacturing process of seamless tubes ensures a uniform structure, enabling them to withstand higher internal pressures, making them ideal for applications with stringent strength requirements.

High-Temperature Resistance: TP316L tubing maintains excellent performance in high-temperature environments up to 870°C.

Application Scenarios

Petroleum and Natural Gas Industry: Pipes for transporting corrosive media.

Chemical and Pharmaceutical Industries: Equipment and pipes for handling chemicals and corrosive fluids.

Marine and Coastal Environments: Its excellent resistance to chloride corrosion makes it an ideal choice for marine engineering and coastal facilities.

Food and Beverage Processing: Pipes for production lines with extremely high hygiene requirements.

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ASTM A268 Stainless Steel Tubing

Z0065c — Tue, 05 Aug 2025 02:00:00 +0000

ASTM A268 Stainless Steel Tubing are widely used in demanding industrial environments such as chemical processing, heat exchangers, boiler manufacturing, and high-temperature gas transportation due to their excellent corrosion resistance and high-temperature performance.

ASTM A268 is a standard established by the American Society for Testing and Materials (ASTM), applicable to ferritic stainless steel seamless and welded tubes, primarily used for mechanical and industrial applications in corrosion-resistant and heat-resistant environments. This standard covers various grades of ferritic stainless steel, such as TP409, TP410, TP430, TP446, and others.

ASTM A268 Specification

Specifications	ASTM A268 / SA 268
Dimensions	ASTM, ASME and API
Size	1/4″ (6.25mm) to 8″ (203mm), WT 0.02″ (0.5mm) to 0.5″(12mm)
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Specialized in	Large Diameter Size
Length	Single Random, Double Random & Cut Length.
Form	Round, Square, Rectangular, Hydraulic Etc
End	Plain End, Beveled End, Treaded

ASTM A268 Chemical Composition

Grade	TP 405	TP 410	TP 429	TP 430	TP 443	TP 446-1	TP 446-2A	…	TP 409
UNS	S40500	S41000	S42900	S43000	S44300	S44600	S44600	S40800	S40900
DesignationB	S40500	S41000	S42900	S43000	S44300	S44600	S44600	S40800	S40900
Element	Composition, %
C, max	0.18	0.15	0.12	0.12	0.2	0.2	0.12	0.08	0.08
Mn, max	1	1	1	1	1	1.5	1.5	1	1
P, max	0.04	0.04	0.04	0.04	0.04	0.04	0.04	0.045	0.045
S, max	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.045	0.045
Si, max	0.75	0.75	0.75	0.75	0.75	0.75	0.75	1	1
Ni	0.50max	0.50max	0.50max	0.50max	0.50max	0.50max	0.50max	0.80max	0.50max
Cr	11.5-13.5	11.5-13.5	14.0-16.0	16.0-18.0	18.0-23.0	23.0-30.0	23.0-30.0	11.5-13.0	10.50-11.75
Mo	…	…	…	…	…	…	…	…	…
Al	0.10-0.30	…	…	…	…	…	…	…	…
Cu	…	…	…	…	0.90-0.25	…	…	…	…
N	…	…	…	…	…	0.10-0.25	0.10-0.25	…	…
Ti	…	…	…	…	…	…	…	12xC min;	6xC min;
Ti	…	…	…	…	…	…	…	1.10max	0.75max

ASTM A268 Tubing Mechanical Properties

Grade and UNS Designation	Tensile strength, min, ksi[MPa]	Yield strength, min, ksi[MPa]	ElongationA in 2 in or 50 mm, min,%
TP 405 S40500	30[415]	30[205]	20
… S40800	55[380]	30[205]	20
TP 410 S41000	60[415]	30[215]	20
TP 429, TP 430, and TP 430 Ti S429000, S43000, and S43036	60[415]	35[240]	20
TP 443 S44300	70[485]	40[275]	20
TP 446-1 S44600	70[485]	40[275]	18
TP 446-2 S44600	65[450]	40[275]	20
TP 409 S40900	55[380]	30[205]	20

Manufacturing Processes

The ASTM A268 standard covers ferritic and martensitic stainless steel tubes used for corrosion-resistant and high-temperature applications. It explicitly specifies two primary manufacturing processes: seamless tubes and welded tubes.

Seamless Tubes (Seamless)

ASTM A268 standard-compliant seamless stainless steel tubes are produced using an integral forming process. They are manufactured by heating and piercing stainless steel round billets, followed by hot rolling, cold rolling, and other processing steps. These tubes have no weld seams, resulting in more uniform wall thickness and more reliable corrosion resistance, particularly in harsh environments involving high pressure, high temperature, or corrosive media.

Welded tubes (Welded)

ASTM A268 welded stainless steeltubes, on the other hand, are made from stainless steel strips that are rolled into shape and then welded using processes such as high-frequency resistance welding or argon arc welding. They offer high production efficiency and relatively low costs, making them suitable for large-diameter, long-distance pipeline installations. Although welded seams are present, strict weld seam processing and inspection, such as grinding and polishing, ultrasonic testing, etc., ensure weld seam quality, enabling them to play a crucial role in low-pressure transportation and building structural support applications, such as low-pressure transportation pipelines for petroleum and natural gas, and handrails in building decorations.

ASTM A268 Stainless Steel Tubing Dimension

Stainless Steel Pipe (ASME B 36.19M)
Nominal Size		OD	Sch5s		Sch10s		Sch40s		Sch80s
DN	NPS	0	T	kg/m	T	kg/m	T	kg/m	T	kg/m
6	1/8	10.3			1.24	0.28	1.73	0.37	2.41	0.47
8	1/4	13.7			1.65	0.49	2.24	0.63	3.02	0.8
10	3/8	17.1			1.65	0.63	2.31	0.84	3.2	1.1
15	1/2	21.3	1.65	0.82	2.11	1	2.77	1.27	3.73	1.62
20	3/4	26.7	1.65	1.04	2.11	1.28	2.87	1.69	3.91	2.2
25	1	33.4	1.65	1.33	2.77	2.09	3.38	2.5	4.55	3.24
32	1 1/4	42.2	1.65	1.68	2.77	2.7	3.56	3.39	4.85	4.47
40	1 1/2	48.3	1.65	1.95	2.77	3.11	3.68	4.05	5.08	5.41
50	2	60.3	1.65	2.44	2.77	3.93	3.91	5.44	5.54	7.48
65	2 1/2	73.0	2.11	3.77	3.05	5.26	5.16	8.63	7.01	11.41
80	3	88.9	2.11	4.6	3.05	6.45	5.49	11.29	7.62	15.27
90	31/2	101.6	2.11	5.29	3.05	7.4	5.74	13.57	8.08	18.63
100	4	114.3	2.11	5.96	3.05	8.36	6.02	16.07	8.56	22.32
125	5	141.3	2.77	9.67	3.4	11.57	6.55	21.77	9.53	30.97
150	6	168.3	2.77	11.55	3.4	13.48	7.11	28.26	10.97	42.56
200	8	219.1	2.77	15.09	3.76	19.96	8.18	42.55	12.7	64.64
250	10	273.1	3.4	23.08	4.19	27.78	9.27	60.31	12.7	96.01
300	12	323.9	3.96	31.89	4.57	36	9.53	73.88	12.7	132.08
350	14	355.6	3.96	35.06	4.78	41.3
400	16	406.4	4.19	42.41	4.78	47.29
450	18	457.2	4.19	47.77	4.78	53.26

ASTM A268 Stainless Steel Tubing Tolerance

Outside Diameter, In.[Mm]	OD Tolerance, In.[Mm]	Wall Thickness, %	Thin Wall Tubes
Up To1⁄2, [12.7], Excl	±0.005 [0.13]	±15
1⁄2 To 11⁄2 [12.7 To 38.1], Excl/Td>	±0.005 [0.13]	±10<	Less Than 0.065 In. [1.6 Mm] Nominal
11⁄2 To 31⁄2 [38.1 To 88.9], Excl	±0.010 [0.25]	±10	Less Than 0.095 In. [2.4 Mm] Nominal
31⁄2 To 51⁄2 [88.9 To 139.7], Excl	±0.015 [0.38]	±10	Less Than 0.150 In. [3.8 Mm] Nominal
51⁄2 To 8 [139.7 To 203.2], Incl	±0.030 [0.76]	±10	Less Than 0.150 In. [3.8 Mm] Nominal

Why is ASTM A268 stainless steel tubing so popular?

Outstanding corrosion resistance

The steel grades covered by ASTM A268, such as TP410 and TP430, are primarily ferritic or martensitic stainless steels, making them particularly suitable for environments containing chlorides, acidic gases, or other corrosive media. These materials exhibit strong resistance to pitting corrosion and stress corrosion cracking, enabling them to operate reliably and stably for extended periods even in marine, chemical, or humid environments, thereby preventing severe corrosion issues such as crevice corrosion and significantly enhancing system reliability and service life.

Excellent high-temperature performance

ASTM A268 steel tubes maintain good performance in high-temperature environments, with their alloy composition providing excellent oxidation resistance and thermal stability. Even under continuous high-temperature operating conditions, they retain good mechanical strength and structural integrity, making them commonly used in high-temperature equipment such as heat exchangers, furnace tubes, and exhaust systems.

High strength and excellent wear resistance

Especially martensitic grades like TP410, which can significantly enhance hardness and strength after heat treatment. This makes them ideal for environments requiring high pressure or frequent wear, widely used in boiler systems, energy equipment, and various mechanical structures.

Excellent machinability and flexible installation

In addition to its superior performance, ASTM A268 stainless steel tubing offers excellent machinability, supporting conventional cutting, bending, welding, and forming processes.

Application Areas

Petroleum refining equipment and heating furnace pipes

Heat exchangers and condenser tubes

Industrial boilers and flue gas systems

Chemical processing equipment

Automotive exhaust systems and exhaust gas recovery systems

Heating systems in the paper and textile industries

ZIZI specialize in selling all kinds of pipe fittings, tubes, plates, flanges, bolts and nuts, our products are widely used in many fields, from precision machinery manufacturing to warm home decoration and even high-end aerospace industry. We have become a trusted choice for many industries due to our superior product quality and wide range of applications. Not only do we offer a wide range of products, but we can also provide customized processing services according to the specific needs of our customers, ensuring that your expectations are accurately met every time we work together. With advanced production equipment and strict quality management system, we are committed to providing high-quality piping solutions to customers worldwide. Welcome to contact us.

The post ASTM A268 Stainless Steel Tubing appeared first on Supplier of Quality Forged Fittings-Flanges.

Monel 400 Tube

Z0065c — Tue, 11 Feb 2025 10:11:37 +0000

Monel 400 tube constructed in accordance with the specification covers not only the outside diameter but also its average wall. Moreover, the Monel 400 Seamless Tube also covers dimensions such as the outside diameter and minimum wall tube. Slightly magnetic at ambient temperature, the Monel Alloy 400 Tube is resistant to seawater and steam, as it is resistant to salt and caustic solutions at elevated temperature settings. Since we offer highly competitive prices, we are one of the most popular Monel 400 Tubing suppliers in China. To learn more about these prices, you can check Alloy 400 Tube price list.

ASME B163 UNS N04400 tubes are made of a nickel-copper alloy that is highly resistant to corrosion and has good mechanical properties，They are often used in high-performance applications.

What is a Monel tube?

A Monel tube is a pipe or tube made from a nickel-copper alloy called “Monel,” which is known for its excellent corrosion resistance, particularly to saltwater, making it ideal for marine applications like seawater handling systems, and is often used in chemical processing and other industries where high corrosion resistance is required; the most common type of Monel tube is “Monel 400” which is a ductile nickel-copper alloy with good weldability and high strength.

ASME B163 UNS N04400 Pipe Specification

Monel 400® tubing meets a number of industrial, international, MIL-SPEC, and other specifications, including:

UNS:	N04400
Specifications:	ASTM B165, ASTM B829, ASTM B775, ASTM B725, ASTM B163, ASTM B730, ASTM B751,AMS 4574
International Specifications:	din 17752, VdTUV 2635

ASTM B163 Standard Scope

This specification covers seamless tubes of nickel and nickel alloys, as shown in Table 1, for use in condenser and heat-exchanger service.

This specification covers outside diameter and average wall, or outside diameter and minimum wall tube.

The sizes covered by this specification are 3 in. (76.2 mm) and under in outside diameter with minimum wall thicknesses of 0.148 in. (3.76 mm) and under, and with average wall thicknesses of 0.165 in. (4.19 mm) and under.

Tube shall be furnished in the alloys and conditions as shown in Table 2. For small diameter and light wall tube (converter sizes), see Appendix X2.

Terminology

Definitions:

average diameter, n—average of the maximum and minimum outside diameters, as determined at any one cross section of the tube.

tube, n—hollow product of round or any other cross section having a continuous periphery

Monel Alloy 400 Tubes Chemical Composition

The material shall conform to the composition limits specified in Table 1.

If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis per Specification B880.

Table 1

Element	Alloy 400
C	0.30 max
Mn	2.00 max
Si	0.50 max
S	0.024 max
Cu	28.00 – 34.00
Fe	2.50 max
Ni	63.00 min

ASME SB 163 UNS N04400 Monel Pipe Mechanical Properties

Mechanical Properties—The material shall conform to the mechanical properties specified in Table 2.

Hardness—When annealed ends are specified for tubing in the stress-relieved condition (see Table 2), the hardness of the ends after annealing shall not exceed the values specified in Table 2.

Table 2

Condition	Tensile Strength, min.	Yield Strength, min.	Elongation,	Hardness,
Condition	ksi [MPa]	ksi [MPa]	min. %	HRB
Annealed	70 [483]	28 [193]	35	–
Stress-Relieved	85 [586]	55 [379]	15	≤75

Alloy 400 Tubes Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
Monel 400	2.436	N04400	NW 4400	NA 13	МНЖМц 28-2,5-1,5	NU-30M	NiCu30Fe

What is the difference between Monel 400 and Monel 500?

Monel 400 is a standard nickel-copper alloy with good corrosion resistance, while Monel 500, also known as Monel K-500, is a precipitation-hardenable version of Monel 400, meaning it has significantly higher strength and hardness due to the addition of elements like aluminum and titanium, which allows for further strengthening through heat treatment; essentially, Monel 500 offers the same corrosion resistance as Monel 400 but with much greater mechanical strength.

Monel 400:

Corrosion Resistance: Excellent in both reducing and oxidizing environments, especially in seawater and acidic conditions.

Mechanical Properties: Good strength and toughness, suitable for a variety of industrial environments.

Processability: Easy to process and weld.

Monel 500:

Corrosion Resistance: Similar to Monel 400, but with the addition of aluminum and titanium to further improve corrosion resistance.

Mechanical Properties: Higher strength and hardness, suitable for high stress environments.

Processability: Good processing and welding performance, but slightly more difficult to process than Monel 400 due to the addition of aluminum and titanium.

Summary

Monel 400 is suitable for general corrosion-resistant environments and has good processability and mechanical properties.

Monel 500 is based on Monel 400, but by adding aluminum and titanium, it improves strength and corrosion resistance and is suitable for more demanding applications.

Is Monel 400 better than stainless steel?

Whether Monel 400 is better than stainless steel depends on the specific application and the properties required. Both materials have unique advantages and limitations.

Corrosion Resistance

Monel 400:

Excellent resistance to saltwater, acidic, and alkaline environments.

Performs exceptionally well in marine applications and hydrochloric or sulfuric acid environments.

Resistant to stress corrosion cracking in chloride environments.

Stainless Steel:

Good resistance to corrosion in oxidizing environments (e.g., nitric acid).

316 stainless steel has better resistance to chlorides and pitting due to molybdenum content.

Prone to stress corrosion cracking in chloride-rich environments (e.g., seawater).

Winner: Monel 400 is superior in marine and highly corrosive environments, especially where chlorides or reducing acids are present.

Cost

Monel 400:

More expensive due to its high nickel content (~63%).

Typically 3-5 times the cost of stainless steel.

Stainless Steel:

More cost-effective, especially for large-scale applications.

Widely available and easier to source.

Winner: Stainless steel is more cost-effective.

Machinability and Weldability

Monel 400:

More difficult to machine due to its toughness and work-hardening tendency.

Can be welded using similar techniques to nickel alloys.

Stainless Steel:

Easier to machine and weld compared to Monel 400.

Austenitic stainless steels (e.g., 304, 316) are particularly weldable.

Winner: Stainless steel is easier to machine and weld.

Temperature Resistance

Monel 400:

Retains strength and corrosion resistance at both cryogenic and high temperatures (up to ~1000°F / 538°C).

Stainless Steel:

Performs well at moderate temperatures but loses strength at high temperatures.

Prone to scaling and oxidation at temperatures above ~800°F (427°C).

Winner: Monel 400 is better for extreme temperature applications.

In conclusion, Monel 400 is not universally “better” than stainless steel, but it outperforms stainless steel in specific, demanding environments. The choice depends on the application requirements, environmental conditions, and budget.

Property	Monel	Stainless Steel
Cost	More expensive (high nickel content).	More affordable and widely available.
Corrosion Resistance	Exceptional, especially in seawater.	Excellent, but varies by grade (316 is superior to 304).
Strength	High strength, even at elevated temperatures.	Moderate to high, depending on grade.
Hardness	Higher than most stainless steels.	Variable; 316 is softer compared to Monel.
Magnetism	Non-magnetic.	Can be magnetic (e.g., ferritic types).
Applications	Marine, chemical, and high-stress environments.	Construction, medical, food processing, and general-purpose.

Alloy 400 pipe Dimensions and Permissible Variations

NOTE 1—The tolerances in the table apply to individual measurements of outside diameter and include out-of-roundness (ovality), and apply to all materials and all conditions, except that for thin wall tubes having a nominal wall of 3 % or less of the outside diameter, the mean outside diameter shall comply with the permissible variations of the above table and individual measurements (including ovality) shall conform to the plus and minus values of the table with the values increased by 1 ⁄2 % of the nominal outside diameter.

NOTE 2—Eccentricity—The variation in wall thickness in any one cross section of any one tube shall not exceed plus or minus 10 % of the actual (measured) average wall of that section. The actual average wall is defined as the average of the thickest and thinnest wall of that section.

NOTE 3—For tolerances of small diameter and light wall tube (converter sizes) see Appendix X2 (Table X2.2).

Permissible Variations in Outside Diameter and Wall Thickness of Condenser and Heat Exchanger Tubes

Table 3

Material	Nominal Outside Diameter, in. (mm)			Permissible VariationsA
		Outside Diameter, in. (mm)		Wall Thickness,%
		+	−	Average Wall		Minimum Wall
				+	−	+	−
UNS N02200, UNS N02201, and UNS N04400	1⁄2 to 5⁄8 (12.7 to 15.9), excl	0.005 (0.13) 0		12.5	12.5	25.0	0
	5⁄8 to 11⁄2 (15.9 to 38.1), incl	0.005 (0.13) 0.005 (0.13)		10.0	10.0	20.0	0
	over 11⁄2 to 3 (38.1 to 76.2), incl	0.010 (0.25) 0.010 (0.25)		10.0	10.0	22.0	0
UNS N06600-UNS N08120	1⁄2 to 5⁄8 (12.7 to 15.9), excl	0.005 (0.13) 0.005 (0.13)		12.5	12.5	25.0	0
UNS N06686	5⁄8 to 11⁄2 (15.9 to 38.1), incl	0.0075 (0.19) 0.0075 (0.19)		10.0	10.0	20.0	0
	over 11⁄2 to 3 (38.1 to 76.2), incl	0.010 (0.25) 0.010 (0.25)		10.0	10.0	22.0	0

**Alloy,^{^A} Condition, Tube Size, and Bend Radii Limitations**

Table 4
Tube OD, in. (mm)	Average Tube Wall, in. (mm)^B	Minimum Bend Radius, in. (mm)
Tube OD, in. (mm)	Average Tube Wall, in. (mm)^B	Annealed Condition	Stress-Relieved Condition
Up to 1⁄2 (12.7), incl	0.046 to 0.057 (1.17 to 1.45), incl	13⁄16 (30.2)	11⁄4 (31.8)
Up to 1⁄2 (12.7), incl	Over 0.057 to 0.120 (1.45 to 3.05), incl	1 (25.4)	11⁄8 (28.6)
Over 1⁄2 to 5⁄8 (12.7 to 15.9), incl	0.037 to 0.057 (0.94 to 1.45), incl	13⁄16 (30.2)	11⁄4 (31.8)
Over 1⁄2 to 5⁄8 (12.7 to 15.9), incl	Over 0.057 to 0.120 (1.45 to 3.05), incl	1 (25.4)	13⁄16 (30.2)
Over 5⁄8 to 3⁄4 (15.9 to 19.0), incl	0.049 to 0.057 (1.24 to 1.45), incl	11⁄4 (31.8)	11⁄2 (38.1)
Over 5⁄8 to 3⁄4 (15.9 to 19.0), incl	Over 0.057 to 0.109 (1.45 to 2.77), incl	13⁄16 (30.2)	11⁄4 (31.8)
Over 3⁄4 to 1 (19.0 to 25.4), incl	0.049 to 0.058 (1.24 to 1.47), incl	2 (50.8)	4 (101.6)
Over 3⁄4 to 1 (19.0 to 25.4), incl	Over 0.058 to 0.109 (1.47 to 2.77), incl	13⁄4 (44.5)	21⁄4 (57.2)

^A Applies for all alloys except alloy UNS N08810, alloy UNS N08801, and UNS N08811.

^B To determine the bend radius applicable to minimum wall tubing, compute the corresponding average wall from the wall tolerances in Table 3, then use Table 4.

Alloys, Size Ranges, and Yield Strength for Higher Yield Strength Tubes

Table 5
Alloys	Size Range, in. (mm)	0.2 % Yield Strength, ksi (MPa)
Alloys	OD	Wall Thickness	Minimum	Maximum
Nickel-chromium-iron Alloy UNS N06600	1⁄4 to 7⁄8 (6.35 to 22.23)	Up to 0.100 (2.54)	40 (276)	65 (448)
Nickel-chromium-iron Alloy UNS N06601	1⁄4 to 7⁄8 (6.35 to 22.23)	Up to 0.100 (2.54)	40 (276)	65 (449)
Nickel-iron-chromium Alloy UNS N08800	1⁄4 to 7⁄8 (6.35 to 22.23)	Up to 0.100 (2.54)	40 (276)	65 (448)
Nickel-chromium-iron Alloy UNS N06690	1⁄4 to 7⁄8 (6.35 to 22.23)	Up to 0.100 (2.54)	40 (276)	65 (448)

What is Monel 400 used for?

● Marine engineering

● Chemical processing

● Oil and gas

● Heat exchangers

● Valves and pumps

● Nuclear power plants

● Mining

● Oil and refinery

● Pump shafts

● Oil well tools

● Propeller shafts

● Marine applications

● Pumping shafts

● Seawater valves

● Aerospace applications

● Frame structures

● Holding parts

● Exhaust assemblies

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

Monel 400 Tube Exported Countries

We Export Monel 400 Tube to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc

The post Monel 400 Tube appeared first on Supplier of Quality Forged Fittings-Flanges.

Inconel 600 Tube

Z0065c — Thu, 06 Feb 2025 07:11:16 +0000

Inconel 600 Tube is made based on Inconel 600 alloy, Inconel 600 is a nickel-chromium-iron austenite nickel-based alloy.

Nickel based Inconel 600 Tube is meant to be used at elevated temperature settings. Like most nickel alloys the ASME Sb163 600 Inconel Tube has the ability to withstand heat and has superior corrosion resistance property. In fact, the corrosion resistance property of Sb163 Inconel 600 Alloy 600 Seamless Tubing has been inherited from both nickel and chromium. Both these elements consist of the primary alloying content of ASTM B163 N06600 Alloy 600 Tubing. Therefore the Sb 163 UNS N06600 Alloy 600 Tube could be used in applications involving both condensers and heat-exchanger.

Inconel 600 Pipe is used for high temperature applications up to 2000F as well as cryogenic temperature applications. The material is highly weldable and has high corrosion resistance properties. The material has high carburization resistance and oxidation resistance. ZIZI is one of the leading manufacturers of the Inconel 600 Pipe products and a leading supplier.

ASTM B163 N06600 Tubing Specification

Grades	Inconel 600
Grades	ASTM B163 uns n06600
ASTM/ ASME Specification	ASTM B163 / ASME SB 163, ASTM B163 / ASME SB163
ASTM/ ASME Specification	Standard Specification for Inconel 600 Seamless & Welded Superheater, Condenser, Hydraulic, Boiler and Heat-Exchanger Tubes
Shapes	ASTM B163 Alloy 600 Round, Rectangular, Square, Hydraulic, Straight, “U” Shape, Coiled, Honed Tubes, Pan Cake Coils
Manufacturing Type	Seamless / ERW / Welded / Fabricated / CDW / CDS / DOM / CEW / 100% X Ray Welded Tube
Thickness Range	SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXH, SCH XXS, SCH XS
Delivery Condition	Annealed and Pickled (AP), Polished, Bright Annealed (BA), Cold Drawn, MF
END	Plain End, Beveled End, Treaded 600 Inconel Tube
Processing Service	Bending, Welding, Decoiling, Punching, Cutting, Moulding
Technique	ASTM B516 Inconel 600 Cold drawn, Cold rolled, Hot rolled, Extrusion Tube
Inconel UNS N06600 Tubing Packaging	Packed in PE Fabric Bundles or ply wooden box wrapped in plastic or Standard seaworthy export packing or as per customers’ request

ASTM B163 Scope Standard

This specification covers seamless tubes of nickel and nickel alloys, as shown in Table 1, for use in condenser and heat-exchanger service.

This specification covers outside diameter and average wall, or outside diameter and minimum wall tube.

Terminology

Definitions: average diameter, n—average of the maximum and minimum outside diameters, as determined at any one cross section of the tube.

tube, n—hollow product of round or any other cross section having a continuous periphery.

Hydrostatic Test

Each tube with an outside diameter 1⁄8 in. (3.2 mm) and larger and tubes with wall thickness of 0.015 in. (0.38 mm) and over shall be tested by the manufacturer to an internal hydrostatic pressure of 1000 psi (6.9 MPa) provided that the fiber stress calculated in accordance with the following equation does not exceed the allowable fiber stress, S, indicated below. The tube shall show no evidence of leakage.

P = 2St/D

where:

P = hydrostatic test pressure, psi (MPa),

S = allowable fiber stress for material in the condition furnished, as follows:

t = minimum wall thickness, in. (mm); equal to the specified average wall minus the permissible “minus” wall tolerance, Table 4 and Table X2.2, or the specified minimum wall thickness, and

D = outside diameter of the tube, in. (mm).

ASTM B163 N06600 tube Chemical Composition

Grade		C	Mn	Si	Fe	S	Cr	Cu	Ni
Inconel 600	min.	–	–	–	6	–	14	–	72
Inconel 600	max.	0.15	1	0.5	10	0.015	17	0.5	–

ASTM B163 Alloy 600 Tubing Mechanical Properties

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	HARDNESS
Inconel 600	80(552)	35(241)	30%	102max

Equivalent Grades of ASTM B163 Inconel 600 Tubes \ Pipe

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN	OR
INCONEL 600	2.4816	N06600	NCF600	NA 14	МНЖМц 28-2,5-1,5	NC15FE11M	NiCr15Fe	ЭИ868

Is Inconel 600 better than hastelloy?

Inconel and Hastelloy are both excellent nickel-based alloys. It cannot be simply said that Inconel is better than Hastelloy, because they each have their own advantages and are suitable for different application scenarios. The performance depends on the specific use requirements and environmental conditions. The following is an analysis from different performance dimensions.

Mechanical properties

Inconel alloy: It has good strength and toughness at room temperature and can withstand large stress without cracking or excessive deformation. As the temperature rises, its strength decreases relatively slowly. It can still maintain certain mechanical properties in high temperature environments and has good high temperature strength and creep resistance.

Hastelloy alloy: The mechanical properties at room temperature are comparable to those of Inconel alloy, but in high temperature environments, the strength and creep resistance of Hastelloy alloy are more outstanding. This makes the application of Hastelloy alloy more advantageous under some extreme high temperature conditions.

Corrosion resistance

Inconel alloy: It has good tolerance to oxidizing environments and has good corrosion resistance in the atmosphere, water vapor and some oxidizing acids (such as nitric acid). Due to the chromium oxide protective film formed on the surface of the alloy by chromium elements, it can effectively prevent further intrusion of oxygen and other corrosive substances. In some environments with medium corrosion intensity, Inconel alloy can be used for a long time without obvious corrosion.

Hastelloy alloy: It is famous for its excellent corrosion resistance, especially in reducing environments and complex environments containing multiple corrosive media. It has extremely high corrosion resistance to non-oxidizing acids such as hydrochloric acid, sulfuric acid, phosphoric acid, and chloride solutions. In chemical production, various strong acids and complex chemical media are often encountered. Hastelloy alloy can remain stable under these harsh conditions, reduce the risk of corrosion and leakage, and ensure the long-term stable operation of production equipment.

Processing performance

Inconel alloy: The processing difficulty is relatively large. Due to its high strength and high toughness, special tools and processing techniques are required during mechanical processing (such as cutting, drilling, milling, etc.). During hot processing, the control requirements for temperature and processing speed are relatively strict to avoid cracks or other defects.

Hastelloy alloy: The processing performance is similar to that of Inconel alloy, and it also has a high processing difficulty. Because its composition contains more refractory elements, the hardness of the alloy is higher, which further increases the complexity of processing.

What is the difference between Inconel 600 and 750?

Processing Characteristics

Inconel 600: The processing characteristics of these alloys also differ. Inconel 600, with its good hot and cold workability, can be easily formed and welded using various techniques. Its excellent heat treatment stability ensures consistent properties after processing.

Inconel 750: possesses good workability, allowing it to be cut, welded, and bent without significant challenges. Its welding properties are particularly noteworthy, as it can be joined using various welding methods, such as tungsten inert gas welding and laser welding.

Corrosion resistance

Inconel 600: has good corrosion resistance, especially in oxidizing environments. In the atmosphere, water vapor and oxidizing acid (such as nitric acid) environment, a stable chromium oxide protective film can be formed on its surface to effectively resist corrosion. However, in some reducing environments containing specific corrosive media (such as high concentrations of chlorides), the corrosion resistance is relatively limited.

Inconel 750: The corrosion resistance is similar to that of Inconel 600, and it also performs well in oxidizing environments. Due to the optimization of composition, the stability of Inconel 750 in some complex corrosive environments has been improved, and its resistance to intergranular corrosion and stress corrosion cracking is relatively stronger. For example, in marine environments or certain chemical production environments, Inconel 750 is more resistant to cracking caused by the combined action of stress and corrosion than Inconel 600.

Application areas

Inconel 600: It is often used to manufacture parts that require a certain strength and good corrosion resistance in high temperature environments. In the chemical industry, it is used to manufacture equipment for handling corrosive media such as nitric acid and acetic acid, such as reactors and pipelines; in the power industry, it is used to manufacture heat exchangers, steam pipes, etc.; in the food processing industry, due to its good corrosion resistance and hygienic properties, it can be used to manufacture equipment that comes into contact with food.

Inconel 750: Due to its higher strength and creep resistance, it is more used in high-temperature environments that require harsh mechanical properties of materials. In the aerospace field, it is often used to manufacture engine parts, such as turbine blades and combustion chambers. These parts work under high temperature, high pressure and high stress conditions, and require materials to have excellent mechanical properties and stability; In the field of petrochemicals, high-temperature and high-pressure pipelines, reactors and other equipment, Inconel 750 is also widely used to ensure long-term reliable operation of equipment under harsh working conditions.

Permissible Variations

Permissible Variations for Small Diameter and Light Wall Tube (Converter Sizes)

NOTE 1—Ovality, Normal Wall Tube: As-Drawn (No. 2 and 3) Tempers—Ovality will be held within the outside diameter tolerances shown in the table. Annealed (No. 1) Temper—Ovality will be held within 2 % of the theoretical average outside diameter.

NOTE 2—Ovality Light Wall Tube: As-Drawn (No. 2 and 3) Tempers—Ovality will be held within 2 % of the theoretical average outside diameter. Annealed (No. 1) Temper—Ovality will be held within 3 % of the theoretical average outside diameter.

NOTE 3—Wall Tolerances, Light Wall Tube—The plus and minus wall tolerance shown in the table shall apply down to and including 0.005 in. (0.13 mm) in wall thickness. For wall thicknesses less than 0.005 in. the tolerance shall be plus and minus 0.0005 in.

Length,ft		Tube Size,in.		Permissible Variations,in.
Length,ft		Tube Size,in.		Over	Under
U.S.Customary Units
Under 1		Up to 1.250,incl		1/32	0
1 to 4,incl		Up to 1.250,incl		1/16	0
Over 4 to 10,incl		Up to 1.250,incl		3/32	0
Over 10		Up to 1.250,incl		3/16	0
Metric Units
Length,m		Tube Sze,mm		Pemissible Variations,mm
Length,m		Tube Sze,mm		Over	Under
Under 0.3		Up to 31.75,incl		0.794	0
0.3 to 1.2,incl		Up to 31.75,incl		1.59	0
1.2 to 3.0,inc		Up to 31.75,incl		2.38	0
Over 3.0		Up to 31.75,incl		4.76	0
Specified Outside Diameter,in.	Outside Diameter,in.		Inside Diameter,in
Specified Outside Diameter,in.	+	–	+	–	+	–
U.S.Customary Units
Under 3/32	0.002	0	0	0.002	10	10
to 3/16 (0.1875),exd	0.003	0	0	0.003	10	10
3/16 to (0.500),excl	0.004	0	0	0.004	10	10
1/2 to 1 1/4(1.250),incl	0.005	0	0	0.005	10	10
Millimetres
Under 2.38	0.051	0	0	0.051	10	10
2.38 to 4.76,excl	0.076	0	0	0.076	10	10
4.76 to 12.70,exd	0.102	0	0	0.102	10	10
12.70 to 31.8,incl	0.127	0	0	0.127	10	10

What are the disadvantages of Inconel?

Although Inconel alloy has many excellent properties, it also has some disadvantages, as follows:

➪ Difficult processing

➪ Fabrication and Manufacturing Complexity

➪ Susceptibility to Certain Chemicals

➪ Work Hardening

➪ Machining challenges

➪ Complex hot processing

➪ Welding problems

➪ Hot cracking tendency

➪ Porosity and inclusions

➪ High Raw material cost

➪ Limited resistance to certain specific corrosion

➪ Specific strong corrosion environment

➪ Susceptibility to crevice corrosion and stress corrosion cracking

What are the advantages of Inconel?

Inconel is a series of nickel-based alloys. These alloys have many outstanding advantages, making them widely used in many fields:

➪ Excellent corrosion resistance

➪ Tolerance to oxidizing environments

➪ Adaptability to various corrosive environments

➪ Good high temperature performance

➪ High temperature stability

➪ Excellent low temperature performance

➪ Low temperature dimensional stability

➪ Good processing performance

➪ Hot processing performance

➪ Cold processing performance

➪ High weldability

What is Inconel 600 used for?

✮ The usual applications of Inconel 600 include:

✮ Gas turbine components

✮ Vegetable and fatty acid vessels

✮ Titanium dioxide

✮ Soap manufacture

✮ Phenol condensers

✮ MgCl2 evaporates

✮ Gasoline stabilizer production

✮ Furnace trays, mufflers, hangers

✮ Ethylene dichloride crackers

✮ Carburizing atmospheres

✮ Barge and tank truck liners

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

Inconel 600 tube Exported Countries

We Export Inconel 600 tube to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc

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Loading PE and SS SMLS Pipes

Z0065c — Sat, 12 Aug 2017 08:48:32 +0000

Description

They are 2PE seamless steel pipe, stainless steel pipe, fittings and flanges which are loading into 40 open container.

Item	Description of Goods
1	4″ Sch 40S ASME B36.19 Seamless Pipe x 6.1m 316L
2	Seamless Pipe API 5L Gr B BE with 2 PE Coating 2.7mm Black. 219.1×8.18mmx12mtrs
3	4″ Gate Valve 150# OS&Y RF Flanged ANSI A216WCB HFS AP1600/BS1414
4	4″ Check Valve Full bodied RF 316L ASME B36.19
5	8″ Gate Valve 50# OS&Y RF Flanged ANSI A216WCB HFS AP1600/BS1414
6	4″ 90 Deg LR Sch 40S Elbow 316L ASME B36.19
7	4″ 45 Deg LR Sch 40S BW Elbow 316L ASME B36.19
8	4″ 150# RF Blank Flange A182 316L ASME B36.19
9	4″ WN Flanges FR Sch40S A182 316L ASME B36.19
10	3″ x 5/8″ 316L Machines Bolts, Nuts and Wahsers
11	8 “45deg elbow.LR Sch40 BW ASTM A234-WPB ASME B16.9 PE coated
12	8 “ ASME B16.5 Cl 150 raised Flanges ASTM A 105N
13	Machine Bolts & Nuts for the flanges
14	8” Sch 40s SMLS Tee Gr 316L BW
15	8″ WN Flange FR Sch40S A182 316L ASME B36.19
16	8″Cl 150# RF Blank Flange A182 316L ASME B36.19
17	Bolts & Nuts
18	Heat shrink film thickness 2.2mm and width 500mm
19	8” 90Deg LR BW Elbows (lined 2PE)

The post Loading PE and SS SMLS Pipes appeared first on Supplier of Quality Forged Fittings-Flanges.

18 Inch 3PE TPCO Seamless Pipes for Vietnam

Z0065c — Wed, 21 Jun 2017 11:06:51 +0000

3PE TPCO Seamless Pipes

18 Inch 3PE TPCO seamless steel pipes are ready for loading into container.

These pipes will be shipped to Ho Chi Minh Vietnam on 24th June 2017

Product Information:

Size: 457.2 x 12.7mm

Type: Seamless pipe

Material: API 5L B

Brand: TPCO

End: Bevel

Coating: 3PE

Coating thickness: 4mm

Shipment: 40GP

The post 18 Inch 3PE TPCO Seamless Pipes for Vietnam appeared first on Supplier of Quality Forged Fittings-Flanges.

Process of 3PE Coating

Z0065c — Sat, 18 Mar 2017 10:42:10 +0000

Pipe inspection—preheating-—blasting—quality cleaning inspection—Epoxy spraying coating—Medium frequency heating—Adhesive—PE—Water cooling—Appearance examination—Polishing the ends of pipe—To Storage yard of coated Pipe.

The post Process of 3PE Coating appeared first on Supplier of Quality Forged Fittings-Flanges.

seamless steel pipe – Supplier of Quality Forged Fittings-Flanges

Seamless vs Welded Pipe

What Are Steel Pipes?

Manufacturing Process

Characteristics of Seamless Steel Pipes

Characteristics of Welded Pipes

Structural Strength

Application Areas

Performance Characteristics

Surface Quality

Corrosion Resistance

How to Choose Between Seamless and Welded Pipes

EN10216-2 Seamless Tubes

EN 10216 Standard Overview

Product List

Dimension Inspection of European Standard Carbon Steel Tubes

Packaging of EN10216-2 Seamless Tubes

Chemical Composition Inspection

Chemical Composition of EN10216-2 Seamless Tubes

Mechanical Properties of EN10216-2 Seamless Tubes

Tolerances of EN10216 Steel Tube

Tolerances on Outside Diameter and Wall Thickness

Tolerances on Inside Diameter and Wall Thickness

Tolerances on Exact Lengths

EN 10216-2 Seamless Tubes Features

Applications

ASTM A312 TP316L Seamless Pipe

Product Lists

Dimension Inspection of Stainless Steel Seamless Pipes

Packaging

What is ASTM A312 TP316L Seamless Pipe?

ASTM A312 TP316L Stainless Steel Pipe Chemical Composition

ASTM A312 TP316L Stainless Steel Pipe Mechanical Property

Stainless Steel Pipe Dimension

Advantages

Application Scenarios

ASTM A268 Stainless Steel Tubing

ASTM A268 Specification

ASTM A268 Chemical Composition

ASTM A268 Tubing Mechanical Properties

Manufacturing Processes

ASTM A268 Stainless Steel Tubing Dimension

ASTM A268 Stainless Steel Tubing Tolerance

Why is ASTM A268 stainless steel tubing so popular?

Application Areas

Monel 400 Tube

What is a Monel tube?

ASME B163 UNS N04400 Pipe Specification

ASTM B163 Standard Scope

Terminology

Monel Alloy 400 Tubes Chemical Composition

ASME SB 163 UNS N04400 Monel Pipe Mechanical Properties

Alloy 400 Tubes Equivalent Grades

What is the difference between Monel 400 and Monel 500?

Monel 400:

Monel 500:

Summary

Is Monel 400 better than stainless steel?

Corrosion Resistance

Cost

Machinability and Weldability

Temperature Resistance

Alloy 400 pipe Dimensions and Permissible Variations

Permissible Variations in Outside Diameter and Wall Thickness of Condenser and Heat Exchanger Tubes

Alloy,A Condition, Tube Size, and Bend Radii Limitations

Alloys, Size Ranges, and Yield Strength for Higher Yield Strength Tubes

What is Monel 400 used for?

You can get an offer for products in below material forms:

Monel 400 Tube Exported Countries

Inconel 600 Tube

ASTM B163 N06600 Tubing Specification

ASTM B163 Scope Standard

Terminology

Hydrostatic Test

ASTM B163 N06600 tube Chemical Composition

ASTM B163 Alloy 600 Tubing Mechanical Properties

Equivalent Grades of ASTM B163 Inconel 600 Tubes \ Pipe

Is Inconel 600 better than hastelloy?

Mechanical properties

Corrosion resistance

**Alloy,^{^A} Condition, Tube Size, and Bend Radii Limitations**