Carbon & Alloy Steel IBR Pipes Supplier

Quick Answer

Tatvam Overseas Inc is a specialized Mumbai stockist and supplier of IBR-approved ASTM A335 alloy steel (P11, P22, P91) and ASTM A106 Gr. B / API 5L seamless carbon steel boiler pipes. We supply certified high-temperature piping solutions with authentic IBR Form III-C certificates, full traceability, and custom cut lengths.

What Carbon & Alloy Steel Piping Categories Are Available?

Alloy Steel ASTM A335 P11 & P22 IBR Pipes

High-temperature chrome-moly seamless pipes engineered for thermal power plants, superheaters, and high-pressure steam headers.

View P11 / P22 Details

Carbon Steel ASTM A106 Gr. B & API 5L Pipes

Heavy-wall seamless line pipes for oil and gas transmission, refinery processing, petrochemical fluid lines, and general steam distribution.

View Carbon Steel Details

What Are the Standards and Chemical Compositions of Boiler Grades?

Comparison of chemical compositions, pressure ratings, and operating temperature baselines for our carbon and alloy steel piping grades.

Grade	Standard	Chemical Composition	Sizes / Thickness	Finishes / Service
ASTM A335 P11	ASME SA335 / IBR	Cr: 1.00-1.50%, Mo: 0.44-0.65%, C: 0.05-0.15%	1/2" to 24" NB (Sch 40 to Sch XXS)	Black Varnish, Up to 550°C steam
ASTM A335 P22	ASME SA335 / IBR	Cr: 1.90-2.60%, Mo: 0.87-1.13%, C: 0.05-0.15%	1/2" to 24" NB (Sch 40 to Sch XXS)	Black Varnish, Up to 600°C steam
ASTM A335 P91	ASME SA335 / IBR	Cr: 8.00-9.50%, Mo: 0.85-1.05%, V: 0.18-0.25%	1" to 20" NB / TODO: heavy wall sizes	Supercritical thermal power lines
ASTM A106 Gr. B	ASME SA106 / IBR	C: ≤0.30%, Mn: 0.29-1.06%, Si: ≥0.10%	1/2" to 24" NB (Sch 40, 80, 160)	Bare, Black Lacquered, Beveled Ends
API 5L Gr. B / X42	API Spec 5L / ISO 3183	C: ≤0.28%, Mn: ≤1.20%, P: ≤0.030%	2" to 24" NB / Seamless & SAW	3LPE Coated, Bare Oil & Gas lines

Boiler & High-Temperature Engineering Guides

Technical Guide

IBR Boiler Pipes: P11 vs P22 Guide

Complete analysis of creep rupture strength, preheating temperature windows, and post-weld heat treatment (PWHT) rules.

Read IBR Guide

Certification

IBR Form III-C & EN 10204 3.1

Understanding statutory Indian Boiler Regulation compliance and heat-specific material testing certificates.

Read Certification Guide

Frequently Asked Questions About Carbon & Alloy Steel Pipes

What factors determine carbon and alloy steel pipe pricing in Mumbai? ↓

Alloy and carbon steel pipe pricing is governed by chromium and molybdenum raw material surcharges, whether the pipe is seamless or ERW, heavy-wall schedule requirements (Sch 80, Sch 160, XXS), Indian Boiler Regulations (IBR) inspection and Form III-C stamping fees, and total order tonnage.

What sizes, wall thicknesses, and schedules are stocked in Mumbai? ↓

We maintain ready inventory of seamless alloy and carbon steel pipes from 1/2 inch NB up to 24 inch NB in Schedules 40, 80, 160, and XXS. Heavy-wall boiler tubing in custom wall thicknesses from 3.0 mm up to 45.0 mm is also available.

What standards and IBR certifications accompany these pipes? ↓

All boiler pipes strictly comply with ASTM A335 (P11, P22, P91), ASTM A106 Gr. B, and API 5L Grade B. Consignments are certified under Indian Boiler Regulations (IBR) with authentic Form III-A / Form III-C certificates stamped by an authorized Boiler Inspector.

What is the Minimum Order Quantity (MOQ) and dispatch timeline? ↓

Standard warehouse inventory has an MOQ of 1 pipe length (approx. 5 to 6 meters) or 500 kg. Standard stock is dispatched within 24 to 48 working hours from Mumbai, while project lots requiring hydrotesting or third-party inspection dispatch within 3 to 5 days.

What payment terms and mill origins do you offer? ↓

Domestic payments are processed via RTGS, NEFT, and bank LC. International orders are handled via LC at Sight or TT deposit. Primary mill origins include Jindal Saw, MSL (Maharashtra Seamless), ISMT, and approved European and Japanese manufacturers.

Boiler Grade Inquiry

IBR Pipe Quotation

Share required pipe grade (P11, P22, A106), NB size, Schedule, and quantity. Quote within 2-4 working hours (Mon-Sat, 9 AM-7 PM IST).

Send RFQ WhatsApp Sales +91 99303 01181

Technical Tools

Calculate steel pipe weights and explore certified MTC test certificates.

Pipe Weight Calculator IBR Form III-C Sample Product Catalog (PDF)

Carbon & Alloy Steel IBR Pipes Supplier in Mumbai