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EN 10204 3.1 Certified Stock

Stainless Steel Seamless & Welded Pipes & Tubes Supplier in Mumbai

Direct mill stockist and exporter in Mumbai. Ready inventory in standard and customized dimensions with 100% material traceability and fast dispatch.

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Stainless Steel Seamless and Welded Pipes Stock Tatvam Overseas
Dispatch: Mumbai Stock Hub MOQ: 500 kg / Batch

Material Overview & Specifications

Tatvam Overseas Inc is a leading stockist, manufacturer representative, and global exporter of Stainless Steel Seamless and Welded (ERW / EFW) Pipes and Instrumentation Tubes based in Mumbai, India. Backed by over three decades of steel piping expertise, we supply piping systems to oil and gas refineries, petrochemical complexes, thermal power stations, pharmaceutical units, and shipbuilding yards worldwide.

Our pipe inventory spans major austenitic and heat-resistant grades including TP304, TP304L, TP316, TP316L, TP321, and TP310S. Stainless steel seamless pipes conform strictly to ASTM A312 / ASME SA312, manufactured through precision cold pilgering and drawing, followed by solution annealing and hydrotesting. Welded pipes conform to ASTM A358 or A312 specifications, produced with 100% radiographic examination (RT) for critical high-pressure and high-temperature duties.

We stock nominal pipe sizes (NPS) from 1/8 inch up to 24 inches in seamless execution, and up to 48 inches in welded large-diameter formats. Pressure ratings encompass Schedule 5S, 10S, 40S, 80S, and heavy wall 160/XXS schedules. All pipes undergo hydrostatic testing, non-destructive eddy current testing, flattening, flaring, and hardness tests to assure defect-free service under cyclic pressure and thermal loads.

Located strategically close to Mumbai’s Nhava Sheva (JNPT) seaport, Tatvam Overseas Inc coordinates prompt domestic dispatches across India and export shipments to the Middle East, Europe, and Southeast Asia. Full manufacturer EN 10204 3.1 test certification is provided with every pipe length, cross-referenced with permanent continuous heat stenciling.

Technical Specifications

Manufacturing Standards ASTM A312, ASTM A213, ASTM A269, ASTM A358, ASME SA312
Available Grades TP304, TP304L, TP316, TP316L, TP321, TP310S, TP347
Size Range (OD) 1/8" NB to 24" NB (Seamless), up to 48" NB (Welded / EFW)
Schedules / Wall SCH 5S, 10S, 20, 40S, STD, 80S, XS, 120, 160, XXS
Length Options Single Random (5-7m), Double Random (10-12m), Cut Lengths
End Configurations Plain End (PE), Beveled End (BE 37.5°), Threaded (NPT / BSP)
Non-Destructive Testing 100% Hydrostatic, Eddy Current, Radiographic (RT), Ultrasonic (UT)
Mill Test Reports EN 10204 3.1 MTC, IBR Form III-A Available, PMI Verified

Supply & Logistics Capabilities

Minimum Order (MOQ)

500 kg for ready warehouse stock. Custom rolling lots and project consignments from 1 to 5 metric tons.

MTC & Traceability

EN 10204 Type 3.1 Inspection Certificate with 100% heat number correlation and optical emission chemical analysis.

Third-Party Inspection

Coordination with TUV, DNV, SGS, Bureau Veritas, and Lloyds Register for independent physical and dimensional witness.

Custom Processing

In-house CNC laser cutting, waterjet profiling, shearing, plate beveling, and pipe band saw cutting within 48 hours.

Frequently Asked Questions

What is the difference between ASTM A312 and ASTM A213 pipes/tubes? ↓
ASTM A312 covers seamless and welded austenitic stainless steel pipes intended for high-temperature and general corrosive piping systems. ASTM A213 covers seamless ferritic and austenitic boiler, superheater, and heat exchanger tubes with tighter wall tolerances.
Can you supply pipes with beveling and end caps? ↓
Yes, all pipes 2 inches and above are supplied standard with ANSI B16.25 beveled ends and protective plastic end caps to preserve bevel integrity during transit.
Do your pipes comply with IBR (Indian Boiler Regulations)? ↓
Yes, we provide IBR-approved stainless steel pipes complete with certified IBR Form III-G inspection reports signed by authorized boiler inspectors.
What is your standard supply lead time for seamless pipes? ↓
Ex-stock sizes are available for immediate pickup or dispatch within 24 to 48 hours. Custom drawn or non-standard heavy wall pipes require 2 to 3 weeks.
Can you provide third-party PMI testing prior to dispatch? ↓
Yes, we perform on-site handheld XRF Positive Material Identification (PMI) testing on each pipe heat number and can furnish stamped calibration inspection reports.
Fast Quote Response

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Share your required sizes, thickness, schedule, and quantity for immediate wholesale pricing within 2-4 business hours.

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Engineering Resources

Calculate theoretical weights or verify EN 10204 3.1 inspection certificate formatting with our online tools.

Steel Weight Calculator Sample MTC Format Product Catalog (PDF)