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STAINLESS STEEL PIPE
STAINLESS STEEL PIPE – SEAMLESS & WELDED PROCESS
Outside Diameter: Φ6mm – 630mm (1/8″ – 24″)
Wall Thickness: 0.5mm – 40mm (Sch 5S – Sch XXS)
Quality Standards: ASTM, ASME, EN, JIS, DIN, GOST, GB
Length: 5.8m, 6m, 11.8m, 12m, or as per client requirements
Surface Finish: Pickled, Annealed, Polished (Mirror, Satin, Hairline), Bright Annealed (BA)
description
Stainless steel pipe is a high-performance piping solution known for its exceptional corrosion resistance and durability in challenging environments. Available in a precision range from 6mm (1/8″) to 630mm (24″), these pipes are produced using seamless (cold drawing/rolling) or welded (ERW/EFW) methods. They are specifically designed for industries where chemical stability and material purity are non-negotiable.
Unlike carbon steel pipes, our stainless steel products undergo specialized solution annealing and pickling to ensure a stable passive layer. This makes them ideal for long-term service (over 50 years) in corrosive, high-temperature, or strictly hygienic applications.
Product Name: Stainless Steel Pipe, Stainless Steel Tube, Inox Pipe, Duplex Steel Pipe
Specification
- Outer Diameter: 6.0mm to 630mm
- Wall Thickness: 0.5mm to 40.0mm
- Length: 5.8m / 6m / 11.8m / 12m / 18m or Custom
- Ends: Plain ends / Bevelled ends / Threaded (NPT/BSPT) / Flanged
- Surface Treatment: Pickling and Passivation, Mechanical Polishing (180#, 240#, 320#, 400#, 600# grit), Bright Annealing (BA)
Standard and Steel Grade
| Standard | Available Steel Grades |
| ASTM A312 / A358 | 304, 304L, 310S, 316, 316L, 316Ti, 317L, 321, 347H |
| ASTM A789 / A790 | Duplex S31803, S32205; Super Duplex S32750, S32760 |
| ASTM A213 / A269 | TP304, TP316L, High-precision sanitary tubes |
| EN 10217-7 / 10216-5 | 1.4301, 1.4307, 1.4401, 1.4404, 1.4541, 1.4571 |
| JIS G3459 | SUS304, SUS304L, SUS316, SUS316L |
| DIN 17456 / 17458 | ST1.4301, ST1.4401 |
Main application
Stainless steel pipes are indispensable in critical sectors where material integrity is vital:
- Chemical & Petrochemical:Handling highly corrosive fluids, acids, and high-temperature gases in refineries and processing plants.
- Food, Beverage & Dairy:Sanitary-grade piping for production lines, ensuring zero contamination and meeting FDA/3A hygiene standards.
- Water Treatment & Desalination:High-end urban water supply and desalination systems where rust-free performance is mandatory.
- Pharmaceutical & Biotech:High-purity piping for laboratories, vaccine production, and cleanroom fluid transport.
- Marine & Offshore: Duplex steel pipes for subsea equipment and offshore platforms, resisting chloride-induced stress corrosion.
advantages
- Superior Corrosion Resistance:High chromium and nickel content provides a self-healing surface layer against oxidation and chemicals.
- Hygienic and Safe:The smooth internal surface prevents bacterial buildup and ensures no metallic leaching into the medium.
- Precision Manufacturing:Exceptional dimensional accuracy in both small (6mm) and medium (630mm) diameters.
- Temperature Versatility:Maintains structural strength from cryogenic conditions up to 800°C (depending on the grade).
- Life-Cycle Economy:Minimal maintenance requirements and an extremely long service life (50+ years) provide the best return on investment.
- Eco-Friendly:Stainless steel is 100% recyclable, aligning with modern sustainability goals for infrastructure projects.
packing
We apply rigorous packaging standards to protect the premium surface finish of our stainless steel pipes:
- Surface Guard:Individual plastic sleeving or protective film wrapping for polished and BA finished pipes to prevent scratches.
- Contamination Prevention:Plastic end caps or plugs to keep the interior free from dust and moisture during transit.
- Secure Bundling:
- Small Sizes:Bundled with nylon straps and packed in sea-worthy plywood cases to avoid carbon steel contact.
- Medium Sizes:Secured in customized wooden cradles with soft padding to prevent surface marring.
- Logistics: Optimized for 20GP/40HC container loading or LCL (Less than Container Load) with heavy-duty crate protection.
FAQ
Q1: What is the main difference between Grade 304 and 316L stainless steel pipes?
Grade 304 is the standard “18/8” stainless steel for general corrosion resistance. Grade 316L contains added molybdenum, providing significantly better resistance to chlorides and acidic environments. We recommend 316L for marine, chemical, and pharmaceutical applications where higher protection is required.
Q2: Seamless vs. Welded stainless steel pipe: Which one should I choose?
Seamless pipes are ideal for high-pressure and high-temperature environments as they have no weld seam. Welded pipes (ERW/EFW) are more cost-effective for decorative, structural, and low-pressure fluid transport, often offering better dimensional accuracy for diameters up to 630mm.
Q3: What is the maximum diameter and wall thickness you can produce for stainless steel pipe?
Our production range for stainless steel pipe covers an outside diameter from 6mm (1/8″) up to 630mm (24″), with wall thicknesses ranging from 0.5mm to 40mm (Sch 5S to Sch XXS). For larger custom diameters, please consult our technical team.
Q4: Can you provide Mill Test Certificates (MTC) according to EN 10204 3.1?
Yes. Every order is supplied with a full MTC verifying the chemical composition (Chromium, Nickel, etc.) and mechanical properties. We ensure 100% material traceability from the raw billet to the finished pipe.
Q5: What types of surface finishes (Mirror, Satin, BA) do you offer?
We offer various finishes based on application: Pickled & Annealed for industrial use, Bright Annealed (BA) for high-purity lines, and Mechanical Polished (180# to 600# grit) for sanitary and architectural projects.
- Outer Diameter: 6.0mm to 630mm
- Wall Thickness: 0.5mm to 40.0mm
- Length: 5.8m / 6m / 11.8m / 12m / 18m or Custom
- Ends: Plain ends / Bevelled ends / Threaded (NPT/BSPT) / Flanged
- Surface Treatment: Pickling and Passivation, Mechanical Polishing (180#, 240#, 320#, 400#, 600# grit), Bright Annealing (BA)
| Standard | Available Steel Grades |
| ASTM A312 / A358 | 304, 304L, 310S, 316, 316L, 316Ti, 317L, 321, 347H |
| ASTM A789 / A790 | Duplex S31803, S32205; Super Duplex S32750, S32760 |
| ASTM A213 / A269 | TP304, TP316L, High-precision sanitary tubes |
| EN 10217-7 / 10216-5 | 1.4301, 1.4307, 1.4401, 1.4404, 1.4541, 1.4571 |
| JIS G3459 | SUS304, SUS304L, SUS316, SUS316L |
| DIN 17456 / 17458 | ST1.4301, ST1.4401 |
Stainless steel pipes are indispensable in critical sectors where material integrity is vital:
- Chemical & Petrochemical:Handling highly corrosive fluids, acids, and high-temperature gases in refineries and processing plants.
- Food, Beverage & Dairy:Sanitary-grade piping for production lines, ensuring zero contamination and meeting FDA/3A hygiene standards.
- Water Treatment & Desalination:High-end urban water supply and desalination systems where rust-free performance is mandatory.
- Pharmaceutical & Biotech:High-purity piping for laboratories, vaccine production, and cleanroom fluid transport.
- Marine & Offshore: Duplex steel pipes for subsea equipment and offshore platforms, resisting chloride-induced stress corrosion.
- Superior Corrosion Resistance:High chromium and nickel content provides a self-healing surface layer against oxidation and chemicals.
- Hygienic and Safe:The smooth internal surface prevents bacterial buildup and ensures no metallic leaching into the medium.
- Precision Manufacturing:Exceptional dimensional accuracy in both small (6mm) and medium (630mm) diameters.
- Temperature Versatility:Maintains structural strength from cryogenic conditions up to 800°C (depending on the grade).
- Life-Cycle Economy:Minimal maintenance requirements and an extremely long service life (50+ years) provide the best return on investment.
- Eco-Friendly:Stainless steel is 100% recyclable, aligning with modern sustainability goals for infrastructure projects.
We apply rigorous packaging standards to protect the premium surface finish of our stainless steel pipes:
- Surface Guard:Individual plastic sleeving or protective film wrapping for polished and BA finished pipes to prevent scratches.
- Contamination Prevention:Plastic end caps or plugs to keep the interior free from dust and moisture during transit.
- Secure Bundling:
- Small Sizes:Bundled with nylon straps and packed in sea-worthy plywood cases to avoid carbon steel contact.
- Medium Sizes:Secured in customized wooden cradles with soft padding to prevent surface marring.
- Logistics: Optimized for 20GP/40HC container loading or LCL (Less than Container Load) with heavy-duty crate protection.
Q1: What is the main difference between Grade 304 and 316L stainless steel pipes?
Grade 304 is the standard “18/8” stainless steel for general corrosion resistance. Grade 316L contains added molybdenum, providing significantly better resistance to chlorides and acidic environments. We recommend 316L for marine, chemical, and pharmaceutical applications where higher protection is required.
Q2: Seamless vs. Welded stainless steel pipe: Which one should I choose?
Seamless pipes are ideal for high-pressure and high-temperature environments as they have no weld seam. Welded pipes (ERW/EFW) are more cost-effective for decorative, structural, and low-pressure fluid transport, often offering better dimensional accuracy for diameters up to 630mm.
Q3: What is the maximum diameter and wall thickness you can produce for stainless steel pipe?
Our production range for stainless steel pipe covers an outside diameter from 6mm (1/8″) up to 630mm (24″), with wall thicknesses ranging from 0.5mm to 40mm (Sch 5S to Sch XXS). For larger custom diameters, please consult our technical team.
Q4: Can you provide Mill Test Certificates (MTC) according to EN 10204 3.1?
Yes. Every order is supplied with a full MTC verifying the chemical composition (Chromium, Nickel, etc.) and mechanical properties. We ensure 100% material traceability from the raw billet to the finished pipe.
Q5: What types of surface finishes (Mirror, Satin, BA) do you offer?
We offer various finishes based on application: Pickled & Annealed for industrial use, Bright Annealed (BA) for high-purity lines, and Mechanical Polished (180# to 600# grit) for sanitary and architectural projects.
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