IBR Pipes — IBR Approved Seamless Pipe Supplier
Teshi Group is a stockist and supplier of IBR pipes — seamless carbon steel and chrome-moly pipe for boiler, steam and feed piping — sourced from IBR-acceptable mills with the IBR certificate for steam pipes (Form III-A).
We supply IBR pipe together with IBR fittings and flanges manufactured in our own works, so a complete steam line comes with one consistent set of IBR documents.
Specification
| Supply | Stockist and supplier — pipe from IBR-acceptable mills |
|---|---|
| Pipe | Seamless; ERW / welded where permitted by the design |
| Dimensions | ASME B36.10 — NPS ½″–24″, SCH 40 to SCH 160, XS, XXS |
| Materials | SA106 Gr B / C, SA53 Gr B; SA335 P1, P5, P9, P11, P12, P22, P91, P92; SA333 Gr 6; SA312 TP304/316/321/347 |
| Certificates | IBR Form III-A for steam pipes; mill test certificates; Inspecting Authority endorsement |
What makes it IBR
- Material from IBR-acceptable mills, traceable by heat number
- Manufacture and tests verified by the Inspecting Authority
- Hard-stamped with grade, size, heat number and inspection marking
- Supplied with the IBR certificate (Form III-A) signed by the maker and countersigned by the Inspecting Authority
- EN 10204 3.1 mill test certificate and dimensional report with every lot
IBR grades and minimum strength
| Alloy | Typical IBR service | Grade | YieldMPa min | TensileMPa min |
|---|---|---|---|---|
| Carbon steel | Feed water, saturated and moderate superheated steam up to about 425 °C | ASTM A106 Gr.B | 240 | 415 |
| Carbon steel, higher strength | Higher-pressure carbon steel steam lines | ASTM A106 Grade C | 275 | 485 |
| C-½Mo | Moderate-temperature steam | ASTM A335 P1 | 205 | 380 |
| 1¼Cr-½Mo | Superheated steam to about 550 °C | ASTM A335 P11 | 205 | 415 |
| 2¼Cr-1Mo | Main steam and hot reheat to about 580 °C | ASTM A335 P22 | 205 | 415 |
| 9Cr-1Mo-V (Grade 91) | Supercritical main steam and hot reheat to about 600 °C | ASTM A335 P91 | 415 | 585 |
| 9Cr-2W (Grade 92) | Ultra-supercritical main steam | ASTM A335 P92 | 440 | 620 |
How Teshi Group makes and certifies IBR material
Order review
Confirm IBR applicability, design pressure and temperature, material grade, size, rating and the Inspecting Authority named in the order.
IBR-acceptable raw material
Forging bar, billets, plate or pipe bought with mill certificates acceptable under IBR (Well-known Steel Maker or Inspecting Authority-tested material), recorded by heat number.
Manufacture
Forging, heat treatment and machining to ASME B16.5, B16.47, B16.9 or B16.11, with the heat number transferred to every piece.
Inspection and testing
Chemical and mechanical tests, hardness, dimensional inspection and NDT as required, witnessed and verified by the Inspecting Authority.
Stamping and certificate
Each piece is hard-stamped and the IBR certificate of manufacture and test is signed by Teshi Group and countersigned by the Inspecting Authority.
Dispatch
Material ships with the IBR certificate, EN 10204 3.1 mill test certificates and the dimensional report, traceable piece by piece.
IBR certificates
| Certificate (IBR 1950 name) | What it certifies | Used for |
|---|---|---|
| Form III-A | Certificate of manufacture and test of steam pipes | IBR pipes |
| Form III-B | Certificate of manufacture and test of tubes, signed by the Inspecting Authority or a Well-known Tube Maker | Boiler tubes |
| Form III-C | Certificate of manufacture and test of boiler mountings and fittings — the certificate buyers ask for with IBR flanges, fittings and valves | IBR flanges and fittings |
| Form III-F | Certificate of manufacture and test of castings, by the Inspecting Authority or a Well-known Foundry | Cast valve bodies |
| Form III-G | Certificate of manufacture and test of forgings, by the Inspecting Authority or a Well-known Forge | Forgings |
| Form IV | Steel maker's certificate of manufacture and test (Well-known Steel Maker) | Raw material |
| Form IV-A | Certificate of material tested by the Inspecting Authority where the maker's certificate is not available | Raw material |
The Indian Boiler Regulations, 2026 consolidate these certificates under a renumbered set of forms. Until your boiler inspectorate confirms the form required on a specific job, buyers and inspectors still refer to the 1950 names — Form III-A for pipes and Form III-C for flanges and fittings — and Teshi Group issues the certificate in the form prescribed at the time of supply.
IBR in 2026: the current rules
| Act | The Boilers Act, 2025 (Act No. 12 of 2025) — in force from 1 May 2025; it repealed the Indian Boilers Act, 1923 |
|---|---|
| Regulations | Indian Boiler Regulations, 2026 — published in the Gazette of India on 1 October 2026, replacing the Indian Boiler Regulations, 1950 |
| Regulator | Central Boilers Board (Ministry of Commerce & Industry, DPIIT); Technical Adviser (Boilers) is its Member-Secretary |
| Scope | “Boiler components” include steam piping, feed piping and any mounting or fitting subject to pressure above 1 kg/cm² gauge |
| Inspection | Inspecting Authority — the state boiler directorate (in West Bengal, the Directorate of Boilers) or a body recognised by the Central Boilers Board |
| International codes | Materials and designs to ASME, BS, EN, DIN and JIS can be accepted under the regulations, certified through the Inspecting Authority |
Who needs IBR material
Any pipe, flange, fitting or valve in a boiler, steam pipe or feed pipe within the scope of the Boilers Act, 2025 must be made from acceptable material and supplied with a certificate of manufacture and test endorsed by an Inspecting Authority. That covers power plants, captive and cogeneration plants, sugar, paper, textile, food, chemical and refinery steam systems across India.
Lines outside that scope — utility water, air or low-pressure services — usually do not need IBR certification. Your plant's boiler inspectorate decides the boundary.
FAQ
IBR Pipes: common questions
What is an IBR pipe?
Steam or feed-water pipe made and tested so that it is acceptable under the Indian Boiler Regulations, supplied with the IBR certificate for steam pipes (Form III-A under the 1950 numbering).
Which pipe grades are IBR approved?
IBR acceptance is by material, maker and certification rather than a fixed list on our part; the common grades are SA106 Gr B for carbon steel and SA335 P11, P22 and P91 for high-temperature steam.
Is Teshi Group a pipe manufacturer?
No — for pipe we are a stockist and supplier. We manufacture the matching IBR flanges, butt-weld fittings and forged fittings in our own works.
IBR products and resources
IBR flanges
Weld neck, slip-on, socket weld and blind flanges with IBR certificates
ViewOEM manufacturerIBR butt-weld fittings
Elbows, tees, reducers and caps in WPB, WP11, WP22 and WP91
ViewOEM manufacturerIBR socket weld & threaded fittings
Forged fittings to ASME B16.11 with IBR certificates
ViewGuideIBR certificates — Form III-A, III-C and more
Which certificate goes with which product
ViewOverviewAll IBR products
IBR flanges, fittings and pipes from Teshi Group
View
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