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  • TOBO STEEL GROUP CHINA
    Brazil---Aimee
    In the latest vendor rating, TOBO won the excellent rating, it is good, will continue to cooperate.
  • TOBO STEEL GROUP CHINA
    Thailand ---Dave Mulroy
    ASTM A213 T9 Alloy steel pipe ,Stable quality , good price, excellent serive, TOBO GROUP is our trustworthy partner .
  • TOBO STEEL GROUP CHINA
    USA ---Alfaro
    ASTM A182 F55 Super Duplex Flange ,Good quality , we like that ! And delivery time in time also ,very professional.
Contact Person : Joy Wang
Phone Number : 0086-21-31261985
WhatsApp : +8613524668060

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

  • Mirror Finish Stainless Steel Welded Pipe 304/316L ASTM A312 Polished Tube for Decoration
  • Mirror Finish Stainless Steel Welded Pipe 304/316L ASTM A312 Polished Tube for Decoration
  • Mirror Finish Stainless Steel Welded Pipe 304/316L ASTM A312 Polished Tube for Decoration
  • Mirror Finish Stainless Steel Welded Pipe 304/316L ASTM A312 Polished Tube for Decoration
  • Mirror Finish Stainless Steel Welded Pipe 304/316L ASTM A312 Polished Tube for Decoration
Place of Origin Shanghai,China
Brand Name TOBO
Certification ISO/TUV/SGS
Model Number Stainless Steel Welded Pipe
Minimum Order Quantity 1PC
Price Negotiable
Packaging Details Standard Shipping Package
Delivery Time 15-30 Workdays
Payment Terms T/T, Western Union
Supply Ability 10 Ton/Month
Product Details
Product Name Mirror Finish Stainless Steel Welded Pipe 304/316L ASTM A312 Polished Tube For Decoration Specification ASTM A358
Quality No.1 Type Of Pipe Tube Diameter(Round /Square)
Carbon 0.15 Max Processing Technology Hot Rolled
Cutting Method Saw Cutting Grade 304, 316, 321, 310S, 904L, Etc.
European Standard DIN 17457 Technics Welded Or Seamless
Application Construction, Automotive, Oil & Gas, Food Industry Weldingmethod TIG, MIG, Laser Welding
Size DN15-DN2400 Third Party Inspection BV,SGS,ASP
Corrosion Resistant Certifications ISO/EN 10204 Type 3.1 / 3.2 Available
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Product Description

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.

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

4.Key Technical Parameters

Parameter Value / Range
Material grades supplied Austenitic: 304, 304L, 316, 316L, 310S, 321, 347; Ferritic: 409, 430, 439; Martensitic: 410, 420; Duplex: 2205, 2304, 2507; Super-austenitic: 904L, 254SMO
Outside diameter (round pipes) Longitudinal welded: 6 mm – 1219 mm; Spiral welded: 219 mm – 4826 mm
Square and rectangular dimensions From 10×10 mm up to 600×400 mm, with standard corner radii
Wall thickness range 0.3 mm – 25 mm (longitudinal); 3 mm – 50 mm (spiral)
Standard cut lengths 6.0 m, 6.1 m, 12.0 m; custom lengths 0.5 m – 20 m; coils also available
Diameter tolerance (OD) ±0.4% of nominal OD, minimum ±0.2 mm
Wall thickness tolerance ±10% of nominal thickness, subject to standard tables
Straightness tolerance ≤1.0 mm per metre, with total deviation ≤2.5 mm for lengths up to 12 m
Ovality (round pipes) ≤0.8% of nominal OD for thin-wall; ≤1.0% for standard wall
Weld joint efficiency factor 0.85 for ERW process; 0.90 for TIG or plasma welding
Mechanical properties (room temperature, typical minima) Grade 304: Yield 205 MPa, Tensile 520 MPa, Elongation 40%; Grade 316L: Yield 170 MPa, Tensile 485 MPa, Elongation 40%; Grade 2205: Yield 450 MPa, Tensile 620 MPa, Elongation 25%
Hardness (max) 201 HB for 304/304L; 217 HB for 316/316L; 293 HB for 2205
Intergranular corrosion test ASTM A262 Practice E – acceptable weight loss ≤0.075 g/cm² after 48 hours
Hydrostatic test pressure Calculated per ASME B31.3 formula; all pipes tested to at least 1.5× design pressure or as per standard
Non-destructive examination options Eddy current (ASTM E426), ultrasonic (ASTM E213), radiography (ASTM E94), liquid penetrant (ASTM E165)
Internal surface finish (Ra) Industrial: ≤2.0 μm; Sanitary: ≤0.6 μm; Electropolished: ≤0.3 μm
External surface finishes available Pickled and passivated (No.1), cold-rolled annealed (2B), bright annealed (BA), brushed (No.4), hairline, mirror (8K)
End preparations Plain square ends, beveled ends (30° to 37.5°), threaded (NPT or BSP), grooved for mechanical couplings, flanged (slip-on or weld-neck)
Applicable standards ASTM A312, A358, A778, A790, A270; EN 10217-7, EN 10357; JIS G3459, G3463; GB/T 12771, GB/T 12770; ISO 1127
Certification ISO 9001, PED 2014/68/EU, NACE MR0175/MR0103, AD 2000 (optional), with EN 10204 Type 3.1 or 3.2 mill test certificate

 

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.

Tags:

Welded Stainless Steel Tubing

SS Welded Tube

Large Stainless Steel Pipe