Stainless Steel Welded Pipe ASTM A312 304/316L Schedule 40 Polished Tube for Oil & Gas

Stainless Steel Welded Pipe ASTM A312 304/316L Schedule 40 Polished Tube for Oil & Gas

1. Product Description 

Stainless steel welded pipe is a hollow long round steel product manufactured by rolling stainless steel sheets or strips into a cylindrical shape and joining the edges through continuous seam welding. It is an alloy steel pipe material with a high chromium content, offering excellent corrosion resistance, high temperature resistance, and oxidation resistance.

Stainless steel pipes are generally divided into two types: seamless pipes and welded pipes. Welded pipes are produced through processes such as roll forming, welding (TIG, ERW, or SAW), heat treatment, sizing, and surface finishing. The manufacturing process is efficient, allowing for mass production with consistent quality. Common material grades include austenitic stainless steels such as 304, 304L, 316, and 316L, as well as ferritic, martensitic, and duplex stainless steels.

2. Product Applications 

Stainless steel welded pipes are widely used across numerous industries due to their versatility and durability. Key application areas include:

• Oil, Gas, and Petrochemical Industry: Fluid and gas conveyance in piping systems, chemical processing, oil refineries, and pipeline distribution

• Construction and Architecture: Handrails, support structures, decorative frameworks, building water supply systems, and architectural fittings

• Food Processing and Pharmaceutical: Sanitary piping, hygienic fluid transport, and cleanroom systems

• Water Treatment and Supply: Drinking water distribution systems, HVAC systems, and plumbing projects

• Mechanical and Structural Engineering: Machine frames, support columns, automotive components, and structural parts

• Marine and Shipbuilding: Luxury yachts, marine systems, and offshore structures

• Power Generation: Heat exchangers, condensers, and boiler tubing​

3. Product Advantages 

1. Excellent Corrosion Resistance: Forms a strong and renewable protective film, resisting oxidation, rust, and chemical corrosion, suitable for harsh environments

2. Cost-Effectiveness: More economical than seamless pipes, especially suitable for large-scale or budget-sensitive projects

3. Customizable Sizing: Easily manufactured in a wide range of diameters, lengths, and wall thicknesses to meet specific requirements

4. High Production Efficiency: Simple manufacturing process allows for mass production and long-length pipes, reducing joints and simplifying installation

5. Smooth Surface Finish: Ensures minimal friction and efficient fluid flow, advantageous for liquid and gas applications

6. Lightweight yet Robust: Thin-wall production capability offers material and weight efficiency without compromising performance

7. Hygienic and Reliable: No red water or green water pollution issues, ensuring water hygiene and safety

8. Low Maintenance: Requires minimal maintenance for long-term service in demanding environments

4.Key Technical Parameters

FAQ

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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.

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