Stainless Steel Welded Pipe is manufactured from premium stainless steel strips or plates using advanced welding processes such as ERW, Laser Welding, SSAW, and LSAW. It offers excellent corrosion resistance, precise dimensions, and reliable mechanical strength for industrial and structural applications. Widely used in construction, water supply systems, chemical processing, food processing pipelines, and oil & gas transportation.
Material Type :
Stainless SteelOuter Diameter Range :
10mm – 630mmWall Thickness Range :
0.8mm – 50mmCustomizable :
YesOrder(MOQ) :
2TSpecifications
Stainless steel welded pipe is manufactured by forming stainless steel strip or plate into a tubular shape and welding the seam using advanced welding technologies. This production method ensures stable structure, consistent wall thickness, and reliable performance in various industrial environments. Compared with seamless pipes, welded stainless steel pipes provide a more cost-effective solution while maintaining good strength and corrosion resistance. They are especially suitable for large-diameter pipelines and long-length production, which are commonly required in construction and infrastructure projects.
Stainless steel welded pipes perform well in atmospheric, humid, and chemical environments, and can withstand moderate temperatures depending on the material grade. Common grades include 304, 304L, 316, 316L, 321, and 310, which are widely used in industrial piping systems.
These pipes are extensively applied in building structures, water supply systems, chemical processing pipelines, food processing equipment, oil and gas transportation, and mechanical fabrication. With their good weldability and formability, they are suitable for fabrication, bending, and installation in various engineering projects.
Custom sizes, wall thicknesses, surface finishes such as mill finish, pickled or polished, and special welding specifications can be manufactured according to customer requirements and project standards.
Welded Stainless Steel is one of our core strength products. We maintain substantial inventory to ensure rapid delivery and can also customize extra-large diameter seamless pipes according to your specific requirements. Additionally, we provide comprehensive services including spectroscopic analysis, mechanical property testing, pressure testing, and non-destructive testing (NDT).
| Grade | Grade Equivalent | Mechanical Properties | Size Range | Chemical Composition (Typical, %) |
| 304 S30400 |
UNS S30400 EN 1.4301 |
Tensile ≥515 MPa Yield ≥205 MPa Elongation ≥40% |
OD 10–610 mm WT 0.5–8.0 mm Length ≤12 m |
C≤0.08, Cr 18.0–20.0 Ni 8.0–11.0, Mn≤2.0 Si≤1.0, P≤0.045, S≤0.03 |
| 304L S30403 |
UNS S30403 EN 1.4306 |
Tensile ≥485 MPa Yield ≥170 MPa Elongation ≥40% |
OD 10–610 mm WT 0.5–8.0 mm Length ≤12 m |
C≤0.03, Cr 18.0–20.0 Ni 8.0–12.0, Mn≤2.0 Si≤1.0, P≤0.045, S≤0.03 |
| 316 S31600 |
UNS S31600 EN 1.4401 |
Tensile ≥515 MPa Yield ≥205 MPa Elongation ≥40% |
OD 10–610 mm WT 0.5–8.0 mm Length ≤12 m |
C≤0.08, Cr 16.0–18.5 Ni 10.0–14.0, Mo 2.0–3.0 Mn≤2.0, Si≤1.0, P≤0.045, S≤0.03 |
| 316L S31603 |
UNS S31603 EN 1.4404 |
Tensile ≥485 MPa Yield ≥170 MPa Elongation ≥40% |
OD 10–610 mm WT 0.5–8.0 mm Length ≤12 m |
C≤0.03, Cr 16.0–18.5 Ni 10.0–14.0, Mo 2.0–3.0 Mn≤2.0, Si≤1.0, P≤0.045, S≤0.03 |
| 321 S32100 |
UNS S32100 EN 1.4541 |
Tensile ≥515 MPa Yield ≥205 MPa Elongation ≥40% |
OD 10–610 mm WT 0.5–8.0 mm Length ≤12 m |
C≤0.08, Cr 17.0–19.0 Ni 9.0–12.0, Ti≥5×C Mn≤2.0, Si≤1.0, P≤0.045, S≤0.03 |
| 310S S31008 |
UNS S31008 EN 1.4845 |
Tensile ≥515 MPa Yield ≥205 MPa Elongation ≥35% |
OD 10–610 mm WT 0.5–8.0 mm Length ≤12 m |
C≤0.08, Cr 24.0–26.0 Ni 19.0–22.0, Mn≤2.0 Si≤1.5, P≤0.045, S≤0.03 |
| 201 S20100 |
UNS S20100 EN 1.4372 |
Tensile ≥655 MPa Yield ≥310 MPa Elongation ≥40% |
OD 10–610 mm WT 0.5–8.0 mm Length ≤12 m |
C≤0.15, Cr 16.0–18.0 Ni 3.5–5.5, Mn 5.5–7.5 N≤0.25, Si≤1.0 |
| 430 S43000 |
UNS S43000 EN 1.4016 |
Tensile ≥450 MPa Yield ≥205 MPa Elongation ≥22% |
OD 10–610 mm WT 0.5–8.0 mm Length ≤12 m |
C≤0.12, Cr 16.0–18.0 Mn≤1.0, Si≤1.0 P≤0.04, S≤0.03 |
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Note: If you do not find a Stainless steel welded pipe that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
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FAQs
Q: What types and standards of stainless steel do you mainly supply?
A: We mainly supply a wide range of stainless steel products including stainless steel pipes/tubes (seamless and welded), plates, coils, strips, and bars. Common grades include 304/L, 316/L, 321, 310, 410, 430, 2205 (Duplex), and 904L, which are widely used in construction, chemical processing, food equipment, and marine engineering. All stainless steel products comply with international standards such as ASTM, JIS, and EN. We can also provide corresponding material test certificates (MTC) and support customized specifications according to customer project requirements.
Q: Can you provide special specifications or non-standard customization? For example, extra-wide plates or pipes with specific wall thicknesses?
A: Of course. One of our advantages is our flexible customization capabilities. We can provide customized size cutting, special thicknesses, and special surface treatments (such as 2B, BA, No.4 brushed finish, mirror finish) based on your drawings or requirements. Whether it's a small trial order or a large-volume purchase, we can meet your needs.
Q: How do you guarantee the quality and consistency of materials? Do you have quality certifications?
A: Quality is our lifeline. We use direct supply from large steel mills to ensure material traceability. Each shipment comes with a Material Quality Certificate (MTC). We have our own quality control team that conducts random checks on material composition, dimensional tolerances, surface finish, and mechanical properties. Our factory is also ISO 9001:2015 quality management system certified.
Q: What are your delivery times and logistics solutions for overseas customers?
A: For standard-specification in-stock products, we can complete preparation and shipment within 7-14 days. Delivery times for customized products will be determined through negotiation based on the specific process. We have established international logistics partners who can arrange full container load (FCL), less-than-container load (LCL), or air freight according to your needs, and provide various trade terms such as EXW, FOB, CIF, and DDP, with door-to-door service.
Q: As a new customer, how do I begin cooperation? Can you provide samples for testing?
A: The cooperation process is very smooth: 1) You provide specific requirements (brand, specifications, quantity, standards); 2) We provide a quotation and technical advice; 3) After confirmation, we arrange the contract and payment; 4) Production/pickup and quality inspection; 5) Shipment and provision of documentation. We encourage sample testing. For serious customers, we can provide small-size samples to ensure that the materials fully meet your processing and application requirements.
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Note: If you do not find a Stainless steel welded pipe that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
Stainless Steel Welded Pipe is manufactured from premium stainless steel strips or plates using advanced welding processes such as ERW, Laser Welding, SSAW, and LSAW. It offers excellent corrosion resistance, precise dimensions, and reliable mechanical strength for industrial and structural applications. Widely used in construction, water supply systems, chemical processing, food processing pipelines, and oil & gas transportation.
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