Mirror Finish Stainless Steel Welded Pipe 304/316L ASTM A312 Polished Tube for

Product Specification

Mirror Finish Stainless Steel Welded Pipe 304/316L ASTM A312 Polished Tube for Decoration

1. Product Description 

Stainless steel welded pipe is a tubular product formed from stainless steel coils through a series of roll-forming stands, with the longitudinal edges joined by fusion welding under controlled atmosphere. The welding process may employ plasma arc, laser, or high-frequency resistance techniques, depending on the required wall thickness and production speed. After welding, the pipe undergoes in-line heat treatment (solution annealing for austenitic grades) to homogenize the weld zone microstructure and eliminate residual stresses. The final pass through sizing rolls ensures precise dimensional consistency. This product is available in both continuous welded (CW) and electric resistance welded (ERW) variants, with the weld seam either left as-welded or cold-worked (skelp-passed) to improve surface smoothness.

2. Product Applications 

The versatility of stainless steel welded pipes enables deployment in a broad spectrum of engineering fields:

• Municipal engineering: urban water supply and drainage networks, fire-fighting systems, and bridge drainage pipes

• Pulp and paper industry: liquor circulation, bleaching chemical lines, and steam tracing

• Textile and dyeing: high-temperature dye liquor transport and hot water circulation

• Semiconductor and electronics: ultra-pure water and specialty gas distribution systems

• Shipbuilding: ballast water lines, fuel oil transfer, and deck handrails

• Agricultural and irrigation: fertilizer solution conveyance and greenhouse structural supports

• Sports and recreation: flagpoles, stadium seating supports, and playground equipment

• Nuclear power: secondary circuit piping and auxiliary cooling systems (subject to specific grade approval)

3. Product Advantages 

• Uniform weld quality: Automated welding with closed-loop control ensures consistent penetration and minimal heat-affected zone, reducing the risk of intergranular corrosion.

• High production flexibility: Tooling changeovers allow rapid switching between diameters and wall thicknesses, enabling short lead times for both standard and custom orders.

• Excellent forming capability: The cold-rolling process produces pipes with fine grain structure and improved surface hardness, enhancing resistance to abrasion and erosion.

• Lightweight construction: Thin-wall options (down to 0.3 mm) provide significant weight savings over seamless equivalents, simplifying handling and support structures.

• Cost predictability: Stable raw material utilization and high production yield translate into competitive and stable pricing over long-term contracts.

• Full traceability: Each coil is assigned a unique heat number, and all manufacturing parameters are recorded, ensuring complete material genealogy from melt to finished pipe.

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.