EFW Pipe – Supplier of Quality Forged Fittings-Flanges https://www.zzsteels.com Worldwide Pipe Fittings Exporter Wed, 02 Jul 2025 01:33:00 +0000 zh-Hans hourly 1 https://wordpress.org/?v=6.9 ASTM A358 TP 304 EFW Pipe https://www.zzsteels.com/2025/07/02/astm-a358-tp-304-efw-pipe/ Wed, 02 Jul 2025 02:00:06 +0000 https://www.zzsteels.com/?p=6889 ASTM A358 TP 304 stainless steel EFW pipe is an austeni […]

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]]> ASTM A358 TP 304 stainless steel EFW pipe is an austenitic stainless steel pipe produced by welding process, mainly used in pressure piping systems in high temperature and highly corrosive environments. ASTM A358 standard covers electric fusion welded (EFW) stainless steel pipes, which are suitable for fields such as chemical, petrochemical, heat exchanger and power industry.

TP 304 (UNS S30400) is one of the most commonly used stainless steel grades, containing about 18% chromium and 8% nickel, with excellent corrosion resistance, good formability and welding performance. ZIZI can provide different grades (Class 1~Class 5), different sizes and customized specifications according to customers’ needs to ensure reliability and durability under severe working conditions.

 

ASTM A358 EFW Pipe Specification

 

Specification ASTM A358 / ASME SA358
Specification A / SA358 CLASS 1, A / SA358 CLASS 2, A / SA358 CLASS 3, A / SA358 CLASS 4, A / SA358 CLASS 5
Grades 304, 304L, 304H, 309S, 310S, 316, 316L, 316H, 317L, 321, 321H, 347, 347H, 904L ETC.
Type EFW, ELECTRIC FUSION WELDED
Outer Diameter Size Electric Fusion Welded / ERW- 8″ NB To 110″ NB (Nominal Bore Size)
Wall Thickness Schedule 10 To Schedule 160 (3 mm to 100 mm Thickness)
Length 01 Meter to 12.5 Meters, Single Random Length, Double Random Length And Customize Size.
Ends Plain Ends / Beveled Ends
Packaging Loose / Bundle / Wooden Pallet / Wooden Box / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector

 

ASTM A358 Standard Scope

 

ASTM A358 TP316 Stainless Steel EFW Pipe specification covers electric-fusion-welded austenitic chromium-nickel stainless steel pipe suitable for corrosive or high-temperature service, or both, or for general applications.

The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”

This specification covers the grades of alloy and stainless steel listed in Table 1. The selection of the proper grade and requirements for heat treatment shall be at the discretion of the purchaser, dependent on the service conditions to be encountered.

 

Five classes of pipe are covered as follows:

ASTM A358 Class 1 – Pipe shall be double welded by processes employing filler metal in all passes and shall be completely radiographed.
ASTM A358 Class 2 – Pipe shall be double welded by processes employing filler metal in all passes. No radiography is required.
ASTM A358 Class 3 – Pipe shall be single welded by processes employing filler metal in all passes and shall be completely radiographed.
ASTM A358 Class 4 – Same as Class 3 except that the weld pass exposed to the inside pipe surface may be made without the addition of filler metal (see 6.2.2.1 and 6.2.2.2).
ASTM A358 Class 5 – Pipe shall be double welded by processes employing filler metal in all passes and shall be spot radiographed.

 

Chemical Composition of ASTM A358 TP304 EFW Pipe

 

Grade C Mn Si P S Cr Ni N
304 min. – – – – – 17.5 8 –
max. 0.07 2 0.75 0.045 0.03 19.5 10.5 0.1
304L min. – – – – – 18 8 –
max. 0.03 2 0.75 0.045 0.03 20 12 0.1
304H min. 0.04 – – – – 18 8 –
max. 0.1 2 0.75 0.045 0.03 20 10.5 –

 

Mechanical Properties of ASTM A358 TP304 EFW Pipes

 

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
304 515 205 40 92 201
304L 485 170 40 92 201
304H 515 205 40 92 201

 

ASTM A358 Grade 304 EFW Pipes Physical Properties

 

Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (m/m/0C) Thermal Conductivity (W/m.K) Specific Heat 0-1000C (J/kg.K) Electrical Resistivity (n.m)
0-1000C 0-3150C 0-5380C at 1000C at 5000C
304/L/H 8000 193 17.2 17.8 18.4 16.2 21.5 500 720

 

Grade 304 Stainless Steel EFW Pipe Equivalent Grades

 

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
304 S30400 304S31 58E 1.4301 X5CrNi18-10 2332 SUS 304
304L S30403 304S11 – 1.4306 X2CrNi19-11 2352 SUS 304L
304H S30409 304S51 – 1.4948 X6CrNi18-11 – –

 

Material Characteristics

 

Strong corrosion resistance: TP 304 stainless steel pipe contains more than 18% chromium and more than 8% nickel, this composition gives it excellent corrosion resistance, excellent resistance to oxidation, acid and alkali and other media, can maintain good performance in a variety of corrosive environments.

Good heat resistance: can maintain stable mechanical properties at high temperatures, can withstand a certain degree of high-temperature environments, suitable for a number of occasions with temperature requirements.

Excellent processing performance: easy to cut, bend and weld, easy to carry out a variety of processing operations, is conducive to on-site installation and processing, can reduce the construction difficulty and cost.

Convenient cleaning and maintenance: smooth surface, not easy to accumulate dirt, and not easy to rust, daily cleaning and maintenance work is relatively simple, to ensure the long-term stable operation of the piping system.

 

ASTM A358 Stainless Steel EFW Pipe Dimension

 

Nominal Outside Nominal Wall Thickness(mm)
Diameter Diameter ASME B36.19M ASME B36.10M
NPS (mm) SCH5S SCH10S SCH40S SCH80S SCH5 SCH10 SCH20 STD XS
 1/4 13.72 – 1.65 2.24 3.02 – 1.65 – 2.24 3.02
 3/8 17.15 – 1.65 2.31 3.2 – 1.65 – 2.31 3.2
 1/2 21.34 1.65 2.11 2.77 3.73 1.65 2.11 – 2.77 3.73
 3/4 26.67 1.65 2.11 2.87 3.91 1.65 2.11 – 2.87 3.91
1 33.4 1.65 2.77 3.38 4.55 1.65 2.77 – 3.38 4.55
1 1/4 42.16 1.65 2.77 3.56 4.85 1.65 2.77 – 3.56 4.85
1 1/2 48.26 1.65 2.77 3.68 5.08 1.65 2.77 – 3.68 5.08
2 60.33 1.65 2.77 3.91 5.54 1.65 2.77 – 3.91 5.54
2 1/2 73.03 2.11 3.05 5.16 7.01 2.11 3.05 – 5.16 7.01
3 88.9 2.11 3.05 5.49 7.62 2.11 3.05 – 5.49 7.62
3 1/2 101.6 2.11 3.05 5.74 8.08 2.11 3.05 – 5.74 8.08
4 114.3 2.11 3.05 6.02 8.56 2.11 3.05 – 6.02 8.56
5 141.3 2.77 3.4 6.55 9.53 2.77 3.4 – 6.55 9.53
6 168.28 2.77 3.4 7.11 10.97 2.77 3.4 – 7.11 10.97
8 219.08 2.77 3.76 8.18 12.7 2.77 3.76 6.35 8.18 12.7
10 273.05 3.4 4.19 9.27 12.7 3.4 4.19 6.35 9.27 12.7
12 323.85 3.96 4.57 9.53 12.7 3.96 4.57 6.35 9.53 12.7
14 355.6 3.96 4.78 9.53 12.7 3.96 6.35 7.92 9.53 12.7
16 406.4 4.19 4.78 9.53 12.7 4.19 6.35 7.92 9.53 12.7
18 457.2 4.19 4.78 9.53 12.7 4.19 6.35 7.92 9.53 12.7
20 508 4.78 5.54 9.53 12.7 4.78 6.35 9.53 9.53 12.7
22 558.8 4.78 5.54 – – 4.78 6.35 9.53 9.53 12.7
24 609.6 5.54 6.35 9.53 12.7 5.54 6.35 9.53 9.53 12.7
26 660.4 – – – – – 7.92 12.7 9.53 12.7
28 711.2 – – – – – 7.92 12.7 9.53 12.7
30 762 6.35 7.92 – – 6.35 7.92 12.7 9.53 12.7
32 812.8 Thickness :6.35~30mm
| |
84 2133.6
 Remark (1)Marking:Within production capability.
(2)Other nominal diameter and wall thickness subject to the approval of vendor and client.
(3)Calculating formula for the value of mass (kg/m):304/L[W=0.02491t(D-t)], 316/L[W=0.02507t(D-t)]

 

ASTM A358 Stainless Steel EFW Pipe Tolerance

 

TABLE 3 Permitted Variations in Wall Thickness
Tolerance,% from Nominal
NPS Designator Over Under
1/8 to2 1/2 incl ., all t/D
ratios		 20.0 12.5
3 to 18 incl., t/D up to 5%
incl.		 22.5 12.5
3 to 18 incl ., t/D>5% 15.0 12.5
20 and larger,welded,all
t/D ratios		 17.5 12.5
20 and larger, seamless,
t/D up to 5%incl.		 22.5 12.5
20 and larger, seamless,
t/D>5%		 15.0 12.5

 

Application Areas

 

Chemical industry

Food and beverage industry

Pharmaceutical industry

Paper and textile industry

Desalination and shipbuilding industry

Construction industry

 

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）

ASTM A358 TP 304 EFW Pipe Exported Countries

 

We Export ASTM A358 TP 304 EFW Pipe 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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