About Seamless Pipes
General-purpose seamless carbon steel pipes for high-pressure fluid transport, refinery piping, chemical process lines, and structural applications - ASTM A106, API 5L, ASTM A53 Type S.
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
| Nominal Pipe Size (NPS) | 1/2" to 24" (15 NB to 600 NB) |
|---|---|
| Wall Thickness | Schedule 40, 80, 120, 160, XXS (2 mm to 60 mm) |
| Grades | ASTM A106 Gr A/B/C, API 5L Gr B to X70, ASTM A53 Type S, IS 6286 |
| Lengths | Single Random (SRL) 5-7 m, Double Random (DRL) 9-13 m, or cut-to-length |
| End Finish | Plain, beveled (30°), threaded, or with couplings |
Confirm the exact grade, dimensions, tolerance, test certificate, and current availability for your requirement before ordering.
Common applications
- Oil & Gas: Transmission pipelines, gathering lines, and process piping.
- Refineries & Petrochemical: High-temperature process piping and steam distribution.
- Chemical Processing: Corrosive fluid transport and reactor feed lines.
- Power Generation: Boiler feed piping, main steam lines, and auxiliary systems.
Source mills we work with
We procure from established Indian and global mills selected for the required grade, test certificate, and delivery schedule.
- Maharashtra Seamless Limited (MSL)
- Jindal Saw Ltd
- ISMT Limited
- Tenaris
- Ratnamani
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 seamless steel pipes and seamless boiler tubes?
Seamless steel pipes are ordered by NPS and schedule for fluid transport and pressure piping (ASTM A106, API 5L). Seamless boiler tubes are ordered by OD and wall for heat-transfer duty in boilers and heat exchangers (SA192, SA210, SA213). Different products, different buyers, different specifications.
Which grade of seamless pipe is most commonly ordered?
ASTM A106 Grade B is the workhorse grade for refinery and power-plant service up to ~425 °C. For oil & gas transmission, API 5L Grade B to X65 PSL2 is standard. For general utility, ASTM A53 Type S Grade B covers non-critical pressure and structural applications.
Can seamless pipes be supplied with IBR certification?
Yes. ASTM A106 (SA-106) is an IBR-approved specification. We supply seamless pipes with Form III-C certification from IBR-recognised inspecting authorities for boiler feed, steam, and pressure piping applications.
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