On this page 6 sections
Key features of seamless pipes
Seamless Pipes by material
Seamless Pipes are available in the following grades. Select a grade for specifications and sizes.
Stainless Steel
- SS 201 Seamless Pipes
- SS 202 Seamless Pipes
- SS 304 Seamless Pipes
- SS 304L Seamless Pipes
- SS 304H Seamless Pipes
- SS 309 Seamless Pipes
- SS 309S Seamless Pipes
- SS 310 Seamless Pipes
- SS 310S Seamless Pipes
- SS 316 Seamless Pipes
- SS 316L Seamless Pipes
- SS 316Ti Seamless Pipes
- SS 317 Seamless Pipes
- SS 317L Seamless Pipes
- SS 321 Seamless Pipes
- SS 321H Seamless Pipes
- SS 347 Seamless Pipes
- SS 347H Seamless Pipes
- SS 409 Seamless Pipes
- SS 430 Seamless Pipes
- SS 441 Seamless Pipes
- SS 904L Seamless Pipes
- Duplex 2205 Seamless Pipes
- Super Duplex 2507 Seamless Pipes
- SS 253 MA Seamless Pipes
- SS 254 SMO Seamless Pipes
Nickel Alloys
- Inconel 600 Seamless Pipes
- Inconel 601 Seamless Pipes
- Inconel 625 Seamless Pipes
- Inconel 718 Seamless Pipes
- Incoloy 800 Seamless Pipes
- Incoloy 800H Seamless Pipes
- Incoloy 800HT Seamless Pipes
- Incoloy 825 Seamless Pipes
- Monel 400 Seamless Pipes
- Hastelloy C22 Seamless Pipes
- Hastelloy C276 Seamless Pipes
- Nickel 200 Seamless Pipes
- Nickel 201 Seamless Pipes
Alloy Steel
Seamless Pipes: sizes, finishes and testing
- Size range
- NPS ⅛" to 48" and larger (DN 6 – DN 1200+), schedules 5S to XXS, single random, double random and cut lengths
- Finish
- Annealed & pickled, bright annealed, mill finish, black, varnished, galvanised or 3LPE / FBE coated (by material)
- Ends
- Plain end (PE), bevelled end (BE, ASME B16.25), threaded (NPT / BSP), grooved
Testing & documents
- Chemical and mechanical (tension, flattening, flare/bend) tests
- Hydrostatic test or non-destructive electric test (UT/ET) on each length
- Dimensional and visual inspection
- Intergranular corrosion (stainless), impact (low-temperature), hardness (sour service) when specified
- PMI and third-party inspection on request
- EN 10204 3.1 certificate; 3.2 with third-party inspection
Comparisons
Other pipes types
Frequently asked questions
What sizes are seamless pipes available in?
NPS ⅛" to 48" and larger (DN 6 – DN 1200+), schedules 5S to XXS, single random, double random and cut lengths.
Which specifications cover seamless pipes?
Common specs: ASTM A312, A106, A335, A333, API 5L, B444, B622.
What are seamless pipes used for?
Preferred for high-pressure and critical service. That's why it's preferred for high pressure, high temperature, cyclic loading and sour service.
Which materials are seamless pipes available in?
Stainless steel, nickel alloys, carbon and alloy steel and non-ferrous metals, depending on the specification. See the material list above.