Corrosion-Resistant Stainless Steel Welded Pipe 304/316L ASTM A312 for

Product Specification

Corrosion-Resistant Stainless Steel Welded Pipe 304/316L ASTM A312 for Construction Structure

1. Product Description 

Stainless steel welded pipe is a tubular product manufactured by cold-forming stainless steel coil or strip into a tubular shape and then longitudinally welding the seam using continuous high-frequency or tungsten inert gas (TIG) welding. The weld zone is typically subjected to solution annealing or post-weld heat treatment to restore corrosion resistance and mechanical properties. Depending on the application, the pipe can be produced as cold-rolled or hot-rolled, with either single-weld or spiral-weld configurations. Common material grades include austenitic (304/304L, 316/316L), ferritic (409, 430), martensitic (410), and duplex (2205, 2507) stainless steels. The product conforms to international standards such as ASTM, EN, JIS, and GB, ensuring high quality and traceability.

2. Product Applications 

• Oil & gas upstream/midstream – gathering lines, flow lines, and pipeline transportation for corrosive media

• Chemical and petrochemical – process piping, heat exchangers, and reactor internals

• Water and wastewater treatment – desalination plants, sewage treatment, and potable water supply

• Food and beverage – sanitary tubing for dairy, beer, and juice processing (meeting FDA and 3A standards)

• Pharmaceutical and biotechnology – clean steam, WFI (water for injection), and CIP/SIP systems

• Construction and infrastructure – bridge handrails, curtain wall supports, staircases, and decorative tubes

• Automotive and heavy machinery – exhaust systems, structural frames, and hydraulic cylinders

• Power generation – condenser tubing, boiler feedwater, and nuclear-grade applications (where applicable)​

3. Product Advantages 

• Superior corrosion resistance – high chromium and nickel content provide excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich environments.

• Weld integrity – advanced welding techniques (TIG + plasma, ERW, or laser) ensure a narrow heat-affected zone (HAZ) and minimal sensitization, with optional pickling and passivation to remove weld discoloration.

• High dimensional accuracy – modern forming mills and sizing rollers guarantee tight tolerances on outer diameter (OD), wall thickness, and ovality, reducing installation difficulties.

• Cost efficiency – lower raw material cost and higher production speed than seamless pipes, with consistent quality suitable for mass production.

• Long length capability – available in up to 20 meters or custom coils, reducing the number of field welds and lowering total installed cost.

• Excellent surface finish – options include 2B, BA, No.4, mirror polish, and brushed, facilitating cleaning and aesthetic appearance.

• Environmentally friendly – 100% recyclable material with long service life, contributing to green building and sustainable design.

4.Key Technical Parameters

FAQ

1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.

2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.

4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.