Large Diameter Stainless Steel Pipe

DONGSHANG stainless offer welded and seamless large diameter stainless steel pipe in wide range, including heavy wall pipe and thin wall pipe, general stainless steel grades have 304, 304L, 316/316L, other grades can be provided to meet desired application.

Large Diameter Stainless Steel Pipe Specifications

StandardASTM A312, ASTM A778, ASTM A358, ASTM A999
Pipe TypeBoth welded and seamless
GradesTP304, TP304L, TP316L, TP321
Outside DiameterMax 40″
Wall ThicknessMax SCH XXS
Surface finishAnnealing pickling, polishing

Stainless Steel Pipe Sizes and Dimensions

Standard dimensions for welded and seamless wrought steel pipe for high or low temperatures and pressures are described in ASME B36.10. Standard dimensions for welded and seamless wrought stainless steel pipe are described in ASME B36.19. The suffix “S澳门凯发娱乐” in the Schedule Number is used to differentiate B36.19 pipe from B36.10 pipe. ASME B36.10 includes other pipe thicknesses which are also commercially available with stainless steel material. For special use, heavy wall or light wall pipe can be provided, usually it is round shape, plain end and beveled end are available.

  • Outside diameter: min size 1/8 in., max size 40 in., DN6 to DN1000.
  • Wall thickness: SCH 5, 5S, 10, 10S, 20, 30, 40, 40S, 60, 80, 80S, 100, 120, 140, 160, STD, XS and XXS, 1.24mm to 25.4mm.
  • Cut to length: random length can be offered, max length can be 20 meters, and fixed pipe length in 6 meters.

Stainless Steel Grades

There are varieties of stainless steel grades to select depending on application and cost consideration, overall, stainless steel possesses high strength and excellent properties to use in critical environment.

Major categories of stainless steel have Austenitic Stainless Steel, Martensitic stainless steels, Ferritic stainless steels and Duplex (ferritic-austenitic) stainless steels, the most used grade is 304 stainless steel, the second is 316 stainless steel, custom stainless steel grades with chemical composition are shown below.

GradeCarbonSiliconManganeseChromiumNickelMolybdenumSulfurPhosphorous
TP3040,081,02.0018.0 – 20.08.0 – 11.00,030,045
TP304L0,0351,02.0018.0 – 20.08.0 – 13.00,030,045
TP3160,081,02.0016.0 – 18.010.0 – 14.02.00 – 3.000,030,045
TP316L0,0351,02.0016.0 – 18.010.0 – 15.02.00 – 3.000,030,045
TP3210,081,02.0017.0 – 19.09.0 – 12.00,030,045

Welded Large Diameter Stainless Steel Pipe

Welded pipe is made from stainless steel strip or plate, through rollers to form desired shape, and welding longitudinally edges using TIG, EFW, EFW and other welding technologies, for large diameter pipe, double welding may be required.

  • ASTM A312 – Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
  • ASTM A778 – Welded, Unannealed Austenitic Stainless Steel Tubular Products
  • ASTM A358 – Welded Stainless Steel Pipe for High-Temperature Service and General Applications
  • ASTM A790  – Seamless and Welded duplex Stainless Steel Pipe
  • JIS G3468 – Large diameter welded stainless steel pipes

Seamless Large Diameter Stainless Steel Pipe

Seamless pipe is manufactured from hollow billets, through cold finished and heat treatment process to obtain desired pipe dimension, and with manufacturing process together, seamless pipe technology can achieve very heavy wall pipe.

  • ASTM A312 – Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
  • ASTM A376 – Seamless Stainless Steel Pipe for High-Temperature Central-Station Service
  • ASTM A790  – Seamless and Welded duplex Stainless Steel Pipe

Application and Usage

Stainless steel pipe is usually used to transport fluid, like water, oil and gas, they are connected by fittings and flanges to from a flow system.

Large Diameter Stainless Steel Pipe