Welded stainless steel pipe

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Our staff are qualified and certified according to all current welding procedures, thus guaranteeing our customers longitudinally welded stainless steel pipes in line with the requirements.

A wide range of effective production facilities offers you a large number of possibilities:
  • Corrosion resistant pipes with outer diameters from 15 to 2 032 mm (80") and wall thicknesses up to 70 mm
  • Pipes are made from special alloys, titanium or clad materials
  • Pipes with demanding tolerance requirements
  • Pipes in special geometric shapes
  • Pipes according to internationally valid standards, including DIN, DIN EN, DIN EN ISO, NORSOK, API and ASTM

Duplex Welded Stainless Steel Pipe is in the application of Petrochemical and Chemical industry, Onshore and Offshore Oil & Gas field of exploration, production and processing, Pulp and Paper-making industry, Ship Buliding industry, Coal industry and etc.
Producing Standards or Specifications are ASTM A789 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service, ASTM A790 (ASME SA790) Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe, ASTM A928 (ASME SA928) Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal.


Large size SS 304 stainless pipe

The general features of our DSSP: superior corrision resistance, such as pitting corrosion, crevice corrosion, abrasion corrosion; better weldability and mechanical properties; excellent intergranular corrosion resistance and better cost- effectiveness.

Available Welded Stainless Steel Pipe Grades

Available in, 304,304/L, 316, 316/L, 316/H, 321/H, 317, 317/L, 347/H, 309, 310 Alloys 20, 200, 400, 600, 625, 800, 825, C276, C22, & AL6XN

Inspection

With a complete set of advanced testing equipment, we have the following Regular Testing Items:
  • Chemical Composition Analyzing;
  • Metallographic Test ;
  • Mechanical Properties Test;
  • Hydraulic Test;
  • Non-destructive Test, including X-Ray Flaw Detection;
  • Dimensional Checking;

Stainless Steel Seamless Tubes is a hollow steel bar, a large number of pipes used for conveying fluids, such as oil, gas, water, gas, steam,heat exchanger,mechinical machine. In addition, engaging in bending, torsional strength of the same, lighter, and they are also widely used in the manufacture of mechanical parts and engineering structures. Also used in producing all kinds of conventional weapons, the barrel, artillery shells and so on.

 

Tube Specifications

  • A213 – Seamless Stainless Steel Boiler, Super heater, and Heat-Exchanger Tubes
  • A249 – Welded Stainless Steel Boiler, Super heater, Heat Exchanger, and Condenser Tubes
  • A268 – Seamless and Welded Stainless Steel Tubing for General Service
  • A269 – Seamless and Welded Austenitic Stainless Steel Tubing for General Service
  • A270 – Seamless and Welded Stainless Steel Sanitary Tubing
  • A688 – Welded Austenitic Stainless Steel Feedwater Heater Tubes
  • A789 – Seamless and Welded Stainless Steel Tubing for General Service

Custom Grades of Stainless Steel Tube

  • Austenitic: 201, 304/304L, 316/316L, 317/317L, 347/347H, 321/321H, 904L
  • Ferritic: 409, 430, 439, 441, 434, 436, 444, 446
  • Martensitic: 403, 410, 410S, 414/L, 441, 418, 420, 440, 416
  • Duplex: 2205/S31803, S32750, S32760

Delivery requirment:

  • Marking: SunnySteel, material grade, standard, specification, heat no.
  • Surface Treatment: Bright annealed, polished outside and inside surface.
  • Package: knitting strip bundle, wooden box or steel box
  • Mill test certificate: according to EN 10204 3.2
  • Inspection: Third party inspection, or by clints

Common Applications for Stainless Steel Tubing Stainless steel tubing has a number of uses in a wide variety of industries. It can be used during manufacturing in processing plants or can become part of a final product. Stainless steel tubing can also be used in pipelines to transport oil, gas, water, or chemicals.

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