About SS Pipes
Austenitic stainless steel pipes and tubes - seamless and welded - in grades 304, 304L, 316, 316L, 321, and 347 for chemical processing, pharmaceutical, food & beverage, and corrosion-resistant applications.
Use this page as a product and specification reference. The exact material grade, dimensions, manufacturer, certification, inspection scope, quantity, price, availability, freight, and delivery timing are confirmed for the specific RFQ.
Specification reference
| Type | Seamless (hot-finished & cold-drawn) and Welded (ERW, EFW, LSAW) |
|---|---|
| Size Range | NPS 1/8" to 24" (seamless), NPS 1/2" to 60" (welded) |
| Grades | TP304, TP304L, TP316, TP316L, TP321, TP347 |
| Standards | ASTM A312 (pipe), ASTM A213 (tube), ASTM A269 (instrumentation), ASTM A358 (EFW) |
| Finish | Pickled & passivated, bright annealed, or electro-polished |
Confirm the exact grade, dimensions, tolerance, test certificate, and current availability for your requirement before ordering.
Common applications
- Chemical Processing: Acid lines, reactor piping, process distribution.
- Pharmaceutical & Food: Hygienic piping, CIP systems, clean-room process lines.
- Heat Exchangers: Condenser tubes, superheater tubes, boiler tubes.
- Oil & Gas: Offshore platforms, subsea piping, sour-service applications.
Source mills we work with
We procure from established Indian and global mills selected for the required grade, test certificate, and delivery schedule.
- Salem Steel Plant (SAIL)
- Jindal Stainless
- ISMT Limited
- Ratnamani Metals
Applicable standards and specifications
What to include in the RFQ
- Specify the relevant standard or grade where known.
- Provide OD or NB, wall thickness or schedule, required length, and quantity.
- State the delivery city or PIN code and any unloading constraints.
- List MTC, IBR, TPI, marking, inspection, or other documentation requirements.
Frequently asked questions
What is the difference between SS 304 and SS 316?
SS 316 contains 2-3% molybdenum in addition to chromium and nickel, providing significantly better resistance to chloride corrosion and pitting. SS 304 is the general-purpose grade for most chemical environments. SS 316 is specified when chlorides, seawater, or aggressive acids are present. The L-grades (304L, 316L) have lower carbon content to resist intergranular corrosion during welding.
What is the difference between ASTM A312 and ASTM A213?
ASTM A312 covers austenitic stainless steel pipes for general service - ordered by NPS and schedule. ASTM A213 covers seamless stainless and alloy steel tubes for heat-exchanger and boiler service - ordered by OD and wall thickness. The metallurgical requirements are similar but A213 has additional requirements for flattening, flaring, and hardness testing.
Can you supply electro-polished or bright-annealed SS pipes?
Yes, we source electro-polished (EP) and bright-annealed (BA) stainless steel tubing for pharmaceutical, semiconductor, and food-processing applications where surface finish is critical. EP finish achieves Ra ≤ 0.8 μm, and BA finish achieves Ra ≤ 0.4 μm.
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