IBR Flanges, Fittings & Pipes — IBR Approved Manufacturer in India
Teshi Group is an IBR approved manufacturer of IBR flanges, butt-weld fittings and forged fittings in India, and a stockist and supplier of IBR pipes, for boiler, steam and feed piping.
Every IBR order is inspected by the Inspecting Authority and supplied with the IBR certificate of manufacture and test — Form III-C for flanges and fittings, Form III-A for pipes — from carbon steel SA105 / WPB / SA106 Gr B to chrome-moly F11, F22, F91 and Grade 92.
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| Act | The Boilers Act, 2025 (Act No. 12 of 2025) — in force from 1 May 2025; it repealed the Indian Boilers Act, 1923 |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.
IBR products from Teshi Group
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
ViewStockist & supplierIBR pipes
Seamless SA106 Gr B, P11, P22 and P91 pipe with Form III-A
ViewGuideIBR certificates — Form III-A, III-C and more
Which certificate goes with which product
ViewIBR material grades by service
The usual grade sets for IBR steam and feed piping, from carbon steel to Grade 92. Every grade links to its full chemistry and mechanical data sheet.
| Alloy | Typical service | Pipe | Butt-weld fittings | Flanges & forged fittings |
|---|---|---|---|---|
| Carbon steel | Feed water, saturated and moderate superheated steam up to about 425 °C | ASTM A106 Gr.B | ASTM A234 WPB | ASTM A105 |
| Carbon steel, higher strength | Higher-pressure carbon steel steam lines | ASTM A106 Grade C | ASTM A234 WPB | ASTM A105 |
| C-½Mo | Moderate-temperature steam | ASTM A335 P1 | ASTM A234 WP1 | ASTM A182 F1 |
| 1¼Cr-½Mo | Superheated steam to about 550 °C | ASTM A335 P11 | ASTM A234 WP11 Cl.1 | ASTM A182 F11 Cl.2 |
| 2¼Cr-1Mo | Main steam and hot reheat to about 580 °C | ASTM A335 P22 | ASTM A234 WP22 Cl.1 | ASTM A182 F22 Cl.3 |
| 9Cr-1Mo-V (Grade 91) | Supercritical main steam and hot reheat to about 600 °C | ASTM A335 P91 | ASTM A234 WP91 Type 1 | ASTM A182 F91 |
| 9Cr-2W (Grade 92) | Ultra-supercritical main steam | ASTM A335 P92 | ASTM A234 WP92 | ASTM A182 F92 |
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.
Industries we supply IBR material to
- Thermal, captive and cogeneration power plants
- HRSG and waste heat recovery boilers
- Sugar mills and distilleries
- Paper, pulp and textile process steam
- Refineries, fertiliser and chemical plants
- Food, pharmaceutical and dairy steam systems
- Boiler makers and EPC contractors
Why buyers choose Teshi Group for IBR
- IBR approved, ISO 9001:2015 certified manufacturer in India since 1971
- Flanges, fittings and forged fittings made in-house; pipe supplied from IBR-acceptable mills
- Carbon steel to Grade 91 / 92 chrome-moly in one order
- Inspecting Authority inspection arranged and witnessed at our works
- Heat-number traceability from mill certificate to finished piece
- Quotes in 24–48 hours; supply across India and for export
FAQ
IBR Flanges, Fittings & Pipes: common questions
What are IBR flanges and fittings?
Flanges and fittings for boiler, steam and feed piping that are made from acceptable material and supplied with a certificate of manufacture and test countersigned by an Inspecting Authority under the Indian Boiler Regulations.
Which law governs IBR material in 2026?
The Boilers Act, 2025, in force from 1 May 2025, and the Indian Boiler Regulations, 2026, published on 1 October 2026, which replaced the Indian Boiler Regulations, 1950.
Which certificate comes with IBR fittings and flanges?
Under the 1950 numbering, Form III-C — the certificate of manufacture and test of boiler mountings and fittings. IBR pipes come with Form III-A. The 2026 Regulations renumber the forms; we issue the form prescribed at the time of supply.
Which materials are used for IBR piping?
SA106 Gr B pipe with SA234 WPB fittings and SA105 flanges for carbon steel service; P11/WP11/F11, P22/WP22/F22 and P91/WP91/F91 chrome-moly for higher-temperature steam.
Is Teshi Group IBR approved?
Yes. Teshi Group is IBR approved and ISO 9001:2015 certified, and supplies flanges and fittings with IBR certificates countersigned by the Inspecting Authority.
Do you supply IBR pipes?
Yes, as a stockist and supplier: seamless SA106 Gr B, SA335 P11, P22 and P91 pipe from IBR-acceptable mills with Form III-A certificates.
How do I order IBR material?
Send the size, rating or schedule, grade, quantity and the Inspecting Authority to info@teshigroup.com or sales@teshigroup.com. We quote within 24–48 hours.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.