Stockist & supplier ASTM A312 · ASTM A358 · ASME B36.19M · ASME B36.10M
Stainless Steel Pipes — ASTM A312 Seamless & Welded
Stainless steel pipe is austenitic stainless pipe for corrosive and high- or low-temperature service. Teshi Group stocks and supplies ASTM A312 seamless and welded pipe in TP304, 304L, 316, 316L, 321 and 347, plus A358 large-diameter welded pipe. Quotes are sent in 24–48 hours.
Also called: SS pipe, A312 pipe, SS 304 pipe, SS 316L pipe, stainless seamless pipe
What is a Stainless Steel Pipe?
ASTM A312 covers seamless, straight-seam welded and heavily cold-worked austenitic stainless pipe for high-temperature and general corrosive service. Grades such as TP304L and TP316L have low carbon to resist sensitisation after welding, while TP321 and TP347 are stabilised for elevated temperatures. Wall thicknesses follow ASME B36.19M schedules (5S, 10S, 40S, 80S) and, for heavier walls, ASME B36.10M. For large diameters, ASTM A358 electric-fusion-welded pipe made from plate is used.
Key features
- Stockist and supplier — sourced from stainless pipe mills; Teshi does not manufacture pipe
- Seamless and welded pipe to ASTM A312; EFW pipe to ASTM A358
- Grades TP304, 304L, 316, 316L, 321, 347, 310S, 904L and others against order
- Dual-certified grades (e.g. TP304/304L, TP316/316L) available
- Pickled and passivated finish as supplied by the mill
- Matching stainless flanges and butt weld fittings manufactured by Teshi
Specification
| Supply | Stockist & supplier — Teshi Group, India |
|---|---|
| Standards | ASTM A312 (seamless and welded), ASTM A358 (EFW), ASTM A778 against order |
| Wall thickness | ASME B36.19M (SCH 5S, 10S, 40S, 80S) and ASME B36.10M schedules |
| Types | Seamless (SMLS), welded (WLD), heavily cold worked (HCW) |
| Ends | Plain or bevelled |
| Finish | Annealed and pickled; polished finish against order |
| Grades — stainless steel | ASTM A312 / A358 / A269 / A213 TP304, TP304L, TP304H, TP309S, TP310S, TP316, TP316L, TP316H, TP316Ti, TP317L, TP321, TP321H, TP347, TP347H |
| Grades — 904L and 6Mo | 904L (UNS N08904, ASTM B677 / A312); 254 SMO / 6Mo (UNS S31254, A312) |
| Grades — duplex and super duplex | ASTM A790 / A928 UNS S31803, S32205 (2205); S32750 (2507), S32760 |
| Grades — nickel alloys | Monel 400 (ASTM B165), Inconel 600 (B167), Inconel 625 (B444), Incoloy 800 / 800H / 800HT (B407), Incoloy 825 (B423), Hastelloy C276 / C22 (B622), Alloy 20 (B464 / B729), Nickel 200 / 201 (B161) |
| Grades — titanium | ASTM B861 seamless / B862 welded Grade 1, 2, 5, 7, 12 |
| Grades — copper-nickel | Cu-Ni 90/10 (C70600) and 70/30 (C71500), ASTM B466 seamless / B467 welded |
| Testing | Hydrostatic or electric (NDE) test and other A312 requirements; IGC test when specified |
| Documents | Mill test certificate to EN 10204 3.1; EN 10204 3.2 / third-party inspection when the order specifies |
Applications
- Chemical and petrochemical process lines
- Food, dairy and pharmaceutical utilities
- Desalination and water treatment
- Cryogenic and LNG piping
- Heat exchanger and instrument lines
FAQ
Stainless Steel Pipe: common questions
What is the difference between TP304 and TP316 pipe?
TP316 contains 2–3% molybdenum, which improves resistance to pitting in chloride environments. TP304 has no molybdenum and is used where chloride exposure is low. L grades (304L, 316L) have lower carbon for welded systems.
What is the difference between seamless and welded A312 pipe?
Seamless pipe has no weld seam. Welded pipe is made from strip or plate with an autogenous or filler-metal weld and is usually more economical in thin walls and larger sizes. Both are covered by ASTM A312.
Which schedule chart applies to stainless pipe?
ASME B36.19M covers stainless schedules 5S, 10S, 40S and 80S. Heavier walls use ASME B36.10M schedules. See our B36.19 chart for wall thicknesses. Confirm the schedule with your piping class before ordering.
Does Teshi manufacture stainless steel pipe?
No. Teshi Group is a stockist and supplier of Stainless Steel Pipe, sourced from established mills and supplied with the original mill test certificate. Teshi is an OEM manufacturer of flanges, fittings, fasteners, valves and custom fabrications, which can be ordered with it.
Need a size or grade not listed here?
We source against your specification from approved mills, with mill test certificates and inspection before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
Quick RFQ
Quote for Stainless Steel Pipe in 24–48 hours
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