ASME B36.19 – Supplier of Quality Forged Fittings-Flanges https://www.zzsteels.com Worldwide Pipe Fittings Exporter Tue, 01 Jul 2025 09:50:32 +0000 zh-Hans hourly 1 https://wordpress.org/?v=6.9 ASTM A790UNS S31803Duplex Stainless Steel Pipe Order https://www.zzsteels.com/2025/06/30/astm-a790uns-s31803duplex-stainless-steel-pipe-order/ Mon, 30 Jun 2025 02:00:00 +0000 https://www.zzsteels.com/?p=6882 Wall Thickness (WT): Measured with a thickness gauge to […]

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]]> ASTM A790 UNS S31803 Duplex Stainless Steel Pipe

ASTM A790 UNS S31803 Duplex Stainless Steel Pipe Specification

 
Processing Method Seamless and Welded
Size Range 1/8” – 30” / DN6 – 750
Thickness Schedule SCH 10S- SCH 160, XXS
Length 6m or 12 m or Random
Standard ASME B36.19
Surface Treatment Polish , Mirror , Epoxy Powder FBE, 2PE, 3PE Coating
Material Grade ASTM A790 UNS S32205, S31803, 32750, 32760, S32550

Main Features of UNS S31803 Duplex Stainless Steel Pipe

  High corrosion resistance: Excellent resistance to a variety of corrosive media (especially chloride environments), including resistance to chloride stress corrosion cracking, pitting and crevice corrosion. High strength: The yield strength is usually about twice that of common austenitic stainless steel (such as 304L/316L), which means that thinner wall thickness can be allowed in the design, thereby reducing weight and possibly reducing costs. Duplex structure: Composed of approximately half austenite and half ferrite, this unique microstructure gives it the advantages of both austenite (toughness, corrosion resistance) and ferrite (high strength, stress corrosion resistance). Good weldability: Compared with other high-strength materials, it has better weldability. Wide application: Commonly used in industries with high requirements for corrosion resistance and strength, such as oil and gas, chemical industry, seawater desalination, and papermaking.  

ASTM A790 UNS S31803 Pipe Chemical Composition

 
CHEMICAL LIMITS C Mn P S Si Ni Cr Mo N
ASTM A790 S31803 MIN 4.5 21.00 2.50 0.08
MAX 0.03 2.00 0.03 0.02 1.00 6.5 23.00 3.50 0.20

ASTM A790 UNS S31803 Pipe Mechanical Property

 
MATERIAL T.S (MPA) Y.S (MPA) EL % HARDNESS
ASTM A790 S31803 620min 450min 25min 290max

Duplex Stainless Steel Pipe Dimension

  ASTM A790 UNS S31803 duplex stainless steel 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.
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
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

ASTM A790 UNS S31803 Duplex Stainless Steel Pipe Applications

Oil and gas industry: for offshore platforms, oil and gas extraction, transportation and processing equipment, especially in harsh environments containing chlorides. Chemical and petrochemical industry: for pipelines, tanks and heat exchangers handling corrosive chemicals such as acids, alkalis and salts. Desalination and water treatment: ideal for use in desalination plants, sewage treatment plants and seawater cooling systems. Paper & Pulp Industry: Used in bleaching equipment, digesters and related piping, it can effectively resist corrosive chemicals. Structures & Buildings: Structural components in coastal or corrosive environments where high strength and corrosion resistance are required.

Dimensional Inspection

  Outside diameter (OD): Measured with calipers or OD gauge to check whether it is within the standard tolerance. Wall Thickness (WT): Measured with a thickness gauge to ensure that the wall thickness at each point meets the standard wall thickness tolerance requirements (ASTM A312 has positive and negative deviation requirements for wall thickness, and the negative deviation of the nominal wall thickness usually does not exceed 12.5%). Chemical Composition Analysis: Ensure that the chemical composition of the material meets the requirements of the grades in the ASTM A790 standard. Key elements include carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), chromium (Cr), nickel (Ni), and molybdenum (Mo).
ASTM A790 UNS S31803 Duplex Stainless Steel Pipe

ASTM A790 UNS S31803 Duplex Stainless Steel Pipe Specification

 
Processing Method Seamless and Welded
Size Range 1/8” – 30” / DN6 – 750
Thickness Schedule SCH 10S- SCH 160, XXS
Length 6m or 12 m or Random
Standard ASME B36.19
Surface Treatment Polish , Mirror , Epoxy Powder FBE, 2PE, 3PE Coating
Material Grade ASTM A790 UNS S32205, S31803, 32750, 32760, S32550

Main Features of UNS S31803 Duplex Stainless Steel Pipe

  High corrosion resistance: Excellent resistance to a variety of corrosive media (especially chloride environments), including resistance to chloride stress corrosion cracking, pitting and crevice corrosion. High strength: The yield strength is usually about twice that of common austenitic stainless steel (such as 304L/316L), which means that thinner wall thickness can be allowed in the design, thereby reducing weight and possibly reducing costs. Duplex structure: Composed of approximately half austenite and half ferrite, this unique microstructure gives it the advantages of both austenite (toughness, corrosion resistance) and ferrite (high strength, stress corrosion resistance). Good weldability: Compared with other high-strength materials, it has better weldability. Wide application: Commonly used in industries with high requirements for corrosion resistance and strength, such as oil and gas, chemical industry, seawater desalination, and papermaking.  

ASTM A790 UNS S31803 Pipe Chemical Composition

 
CHEMICAL LIMITS C Mn P S Si Ni Cr Mo N
ASTM A790 S31803 MIN 4.5 21.00 2.50 0.08
MAX 0.03 2.00 0.03 0.02 1.00 6.5 23.00 3.50 0.20

ASTM A790 UNS S31803 Pipe Mechanical Property

 
MATERIAL T.S (MPA) Y.S (MPA) EL % HARDNESS
ASTM A790 S31803 620min 450min 25min 290max

Duplex Stainless Steel Pipe Dimension

  ASTM A790 UNS S31803 duplex stainless steel 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.
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
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

ASTM A790 UNS S31803 Duplex Stainless Steel Pipe Applications

Oil and gas industry: for offshore platforms, oil and gas extraction, transportation and processing equipment, especially in harsh environments containing chlorides. Chemical and petrochemical industry: for pipelines, tanks and heat exchangers handling corrosive chemicals such as acids, alkalis and salts. Desalination and water treatment: ideal for use in desalination plants, sewage treatment plants and seawater cooling systems. Paper & Pulp Industry: Used in bleaching equipment, digesters and related piping, it can effectively resist corrosive chemicals. Structures & Buildings: Structural components in coastal or corrosive environments where high strength and corrosion resistance are required. On June 3, 2025, we received a request for quotation from a new customer in China for a batch of ASTM A790 UNS S31803 duplex stainless steel pipe. The customer has strict requirements on the specification, tolerance, surface quality and third-party testing and certification of the tubes, and focuses on the product’s corrosion resistance and delivery lead time. ZIZI is a company specializing in the production and processing of pipes and fittings. The pipes and pipe fittings we produce are mainly used in chemical, petroleum, natural gas, water conservancy, electric power, marine engineering and other fields. The products mainly include seamless pipes, welded pipes, butt-welded pipe fittings, high-pressure forged pipe fittings and flanges of various sizes. The materials include carbon steel, stainless steel, alloy steel, low-temperature steel, duplex steel, base alloy, etc.

Dimensional Inspection

  Outside diameter (OD): Measured with calipers or OD gauge to check whether it is within the standard tolerance. Wall Thickness (WT): Measured with a thickness gauge to ensure that the wall thickness at each point meets the standard wall thickness tolerance requirements (ASTM A312 has positive and negative deviation requirements for wall thickness, and the negative deviation of the nominal wall thickness usually does not exceed 12.5%). Chemical Composition Analysis: Ensure that the chemical composition of the material meets the requirements of the grades in the ASTM A790 standard. Key elements include carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), chromium (Cr), nickel (Ni), and molybdenum (Mo).
ASTM A790 UNS S31803 Duplex Stainless Steel Pipe

ASTM A790 UNS S31803 Duplex Stainless Steel Pipe Specification

 
Processing Method Seamless and Welded
Size Range 1/8” – 30” / DN6 – 750
Thickness Schedule SCH 10S- SCH 160, XXS
Length 6m or 12 m or Random
Standard ASME B36.19
Surface Treatment Polish , Mirror , Epoxy Powder FBE, 2PE, 3PE Coating
Material Grade ASTM A790 UNS S32205, S31803, 32750, 32760, S32550

Main Features of UNS S31803 Duplex Stainless Steel Pipe

  High corrosion resistance: Excellent resistance to a variety of corrosive media (especially chloride environments), including resistance to chloride stress corrosion cracking, pitting and crevice corrosion. High strength: The yield strength is usually about twice that of common austenitic stainless steel (such as 304L/316L), which means that thinner wall thickness can be allowed in the design, thereby reducing weight and possibly reducing costs. Duplex structure: Composed of approximately half austenite and half ferrite, this unique microstructure gives it the advantages of both austenite (toughness, corrosion resistance) and ferrite (high strength, stress corrosion resistance). Good weldability: Compared with other high-strength materials, it has better weldability. Wide application: Commonly used in industries with high requirements for corrosion resistance and strength, such as oil and gas, chemical industry, seawater desalination, and papermaking.  

ASTM A790 UNS S31803 Pipe Chemical Composition

 
CHEMICAL LIMITS C Mn P S Si Ni Cr Mo N
ASTM A790 S31803 MIN 4.5 21.00 2.50 0.08
MAX 0.03 2.00 0.03 0.02 1.00 6.5 23.00 3.50 0.20

ASTM A790 UNS S31803 Pipe Mechanical Property

 
MATERIAL T.S (MPA) Y.S (MPA) EL % HARDNESS
ASTM A790 S31803 620min 450min 25min 290max

Duplex Stainless Steel Pipe Dimension

  ASTM A790 UNS S31803 duplex stainless steel 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.
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
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

ASTM A790 UNS S31803 Duplex Stainless Steel Pipe Applications

Oil and gas industry: for offshore platforms, oil and gas extraction, transportation and processing equipment, especially in harsh environments containing chlorides. Chemical and petrochemical industry: for pipelines, tanks and heat exchangers handling corrosive chemicals such as acids, alkalis and salts. Desalination and water treatment: ideal for use in desalination plants, sewage treatment plants and seawater cooling systems. Paper & Pulp Industry: Used in bleaching equipment, digesters and related piping, it can effectively resist corrosive chemicals. Structures & Buildings: Structural components in coastal or corrosive environments where high strength and corrosion resistance are required.

The post ASTM A790UNS S31803Duplex Stainless Steel Pipe Order appeared first on Supplier of Quality Forged Fittings-Flanges.

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