ASTM A403 Stainless Steel Pipe Fittings
Types: Elbows (90°, 45°, 180°), Tees, Reducers, Caps, Stub Ends, Crosses
Size Range: 1/2" – 48" (DN15 – DN1200)
Wall Thickness: SCH 5S, 10S, 40S, 80S, XS, XXS
Connection: Butt-Weld, Socket-Weld
Test: UT, SGS testing, TUV etc
Quality control: MTC Test Certificate is supplied with shipment
Baohui Steel supplies superior ASTM A403 Fittings that meet rigorous international standards for performance and safety. ASTM A403 Stainless Steel Pipe Fittings are high-quality wrought austenitic stainless steel fittings designed for corrosive and high-temperature piping systems. This specification covers wrought austenitic stainless steel piping fittings for pressure applications, providing excellent corrosion resistance, mechanical properties, and reliability. Our ASTM A403 fittings are manufactured to the highest standards, ensuring optimal performance in chemical processing, oil and gas, power generation, and other demanding industries.
Specifications
|
Parameter |
Details |
|
Types |
Elbows (90°, 45°, 180°), Tees, Reducers, Caps, Stub Ends, Crosses |
|
Size Range |
1/2" – 48" (DN15 – DN1200) |
|
Wall Thickness |
SCH 5S, 10S, 40S, 80S, XS, XXS |
|
Standard |
ASTM A403, ASME SA403, MSS SP-43 |
|
Connection |
Butt-Weld, Socket-Weld |
|
Pressure Rating |
Class 150, 300, 600, 900, 1500, 2500 |
Available Grades
|
Grade Group |
Common Grades |
|
WP Group 1 |
WP304, WP304L, WP316, WP316L |
|
WP Group 2 |
WP309, WP310, WP317, WP317L |
|
WP Group 3 |
WP321, WP321H, WP347, WP347H |
|
Special Grades |
WP904L, 6Mo, 254 SMO |
Mechanical Properties
|
Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
Hardness (HB) |
|
WP304/L |
≥ 485 |
≥ 170 |
≥ 40 |
≤ 192 |
|
WP316/L |
≥ 485 |
≥ 170 |
≥ 40 |
≤ 192 |
|
WP321/H |
≥ 515 |
≥ 205 |
≥ 40 |
≤ 192 |
|
WP347/H |
≥ 515 |
≥ 205 |
≥ 40 |
≤ 192 |
Key Performance Highlights
Corrosion Resistance
Austenitic grades rely on a chromium-nickel passive layer to resist oxidation and mild chemicals; duplex grades add molybdenum and nitrogen for extreme chloride and sour gas (H₂S) resistance.
Weldability
Austenitic grades (WP304L, WP316L) weld easily via TIG/MIG with minimal post-weld heat treatment; duplex grades require controlled heat input to maintain duplex microstructure.
Strength
Duplex grades offer 2x the yield strength of austenitic grades, allowing for thinner wall fittings (reducing weight and cost) in high-pressure systems.
Quality Assurance & Certifications
Our ASTM A403 stainless steel pipe fittings meet the highest industry standards, with:
Material Test Reports (MTRs)
Certify chemical composition, mechanical properties, and compliance with ASTM A403.
Non-Destructive Testing (NDT)
Optional UT (ultrasonic), RT (radiographic), or hydrostatic/pneumatic pressure testing.
International Certifications
EISO 9001, API 5L (oil & gas), FDA (food/pharma), and ASME BPVC (boiler/pressure vessels).
FAQ
Q: What is the difference between ASTM A403 and A182?
A: A403 covers wrought fittings while A182 covers forged fittings. A403 is typically for austenitic grades, while A182 includes various alloy types.
Q: Can you provide special material grades?
A: Yes, we can supply duplex, super duplex, and other special alloy fittings upon request.
Q: Do you offer custom sizes?
A: Yes, we provide ASTM A403 Stainless Steel Pipe Fittings custom sizes and non-standard dimensions to meet specific project requirements.
Q: What documentation do you provide?
A: We provide MTC 3.2 certificates, test reports, and material traceability documentation.
Q: Can you supply fittings for offshore applications?
A: Yes, we can provide fittings meeting NORSOK and DNV standards for offshore applications.
Request a Quote – Contact Us Today!
Custom ASTM A403 Stainless Steel Pipe Fittings Solutions Available – Contact Us Now!
WhatsApp: 8613468954786
Email:baohui@bhsteelpipe.com
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