IBR Approved Pipe Fittings: What Indian Power and Process Plants Need to Know

What Is IBR?

The Indian Boiler Regulations, 2026 (IBR 2026), which replaced IBR 1950 on 1 October 2026, under the Boilers Act, 2025 (which replaced the Indian Boilers Act, 1923 from 1 May 2025), govern the manufacture, inspection, and certification of boilers, boiler mountings and steam-pipe fittings in India. The regulations were notified by the Central Boilers Board (Gazette of India, 1 October 2026), and approvals and inspections are handled by the state Chief Inspectors of Boilers and recognised Inspecting Authorities. Any boiler or steam piping system above the IBR threshold must use materials and fittings approved under IBR.

When IBR Approval Is Required

Under the Indian Boilers Act, 1923 (as amended in 2007), a steam-pipe was covered when the steam pressure exceeded 3.5 kg/cm² above atmospheric pressure, or when the pipe exceeded 254 mm internal diameter and the steam pressure exceeded 1 kg/cm² above atmospheric pressure. The 1923 Act has been replaced by the Boilers Act, 2025, so confirm the current definition of a steam-pipe with your state Chief Inspector of Boilers. Power plants, refineries, and process plants with steam distribution within IBR scope must use IBR-approved fittings throughout the steam circuit.

What IBR Approval Involves

A fitting manufacturer seeking IBR approval must: (1) have the manufacturing facility inspected and approved by the Chief Inspector of Boilers (CIB) of the relevant state; (2) submit design calculations and material traceability documentation for each fitting type and size range; (3) have sample fittings hydrostatically tested to 1.5× design pressure in the presence of the CIB or their representative; (4) maintain an approved drawing register for each fitting type. The resulting IBR Certificate of Approval is issued by the state CIB and lists the specific grades, sizes, and pressure classes covered.

IBR-Approved Grades Supplied by Arshya

• Carbon Steel WPB (IS 1239 / ASTM A234): For steam service up to 427°C and working pressures per ASME B16.9 pressure-temperature ratings.
• Alloy Steel P11 (1¼Cr-½Mo): For superheated steam to 530°C.
• Alloy Steel P22 (2¼Cr-1Mo): For superheated steam to 565°C.
• Stainless Steel 304 / 316L: For corrosive condensate and process steam service.

Documentation Required for IBR Supply

For each IBR-notified delivery, Arshya provides: (1) IBR Form IV (Part D) (formerly Form III-C) — the certificate of manufacture and test for boiler mountings and steam-pipe fittings under regulation 12 of IBR 2026, signed by the maker and the Inspecting Authority; (2) material test certificate (EN 10204 3.1 equivalent — chemical analysis and mechanical properties); (3) hydraulic test certificate; (4) copy of the manufacturer's IBR Certificate of Approval. These documents must accompany the fittings and be submitted to the site's Boiler Inspector before installation. Fittings installed without Form IV (Part D) will fail the boiler inspection and must be replaced. (Orders certified under IBR 1950 before 1 October 2026 carry Form III-C; things done under the old regulations before the change are saved.)

IBR vs EN 10204 3.1

For export projects, IBR approval and EN 10204 3.1 serve parallel purposes — both provide third-party validated traceability of material and testing. European projects require EN 10204 3.1; Indian domestic power and process plants require IBR Form IV (Part D). Arshya can supply both on the same order where a fitting serves both a domestic steam circuit (IBR) and an export replacement parts requirement (EN 10204).