Valves for Power Generation (Thermal, Gas, Hydro)

IBR (Indian Boiler Regulations, 1950) is the regulatory framework for boilers and steam vessels under the Indian Boilers Act. All valves on steam lines with pressure above 3.5 kg/cm² (0.35 MPa) and temperature above 99°C require IBR certification. This includes: boiler drum safety valves, main steam stop valves, feed check valves, blowdown valves, and all steam isolation valves in the turbine hall. IBR documents required: Form III-C (chemical and mechanical test certificate for material) and Form III-E (hydrostatic test certificate for the finished valve).

A217 WC9 (2.25Cr-1Mo) is used for high-pressure steam valves up to 566°C (1050°F) and is standard for most subcritical (Main Steam temp ~538°C) and conventional supercritical power plants. ASTM A217 C12A is the cast equivalent of P91 (9Cr-1Mo-V) forged material and is used for ultra-supercritical (USC) plants where main steam temperatures reach 600–620°C. P91/C12A has superior creep strength but requires more stringent PWHT and welding controls.

Yes. Vajra Industrial Solutions supplies high-pressure steam valves meeting NTPC / BHEL specifications with IBR certification. Our valves comply with NTPC standard specifications for piping material classes (typically Class 600–2500 for main steam / HP feedwater) and are available for third-party inspection (TPIA, Bureau Veritas, or client-nominated inspector). We supply to EPC contractors (L&T, BGR, Thermax) and directly to power plant operators for MRO (maintenance, repair) requirements.