Comprehensive guide covering valve type selection, material specification, and IBR compliance requirements for saturated and superheated steam service.
Selecting the correct valve for steam service requires careful consideration of operating conditions, valve type, material selection, and regulatory compliance — particularly IBR (Indian Boiler Regulations) in India.
Steam Service Conditions
Steam valves must be specified against: - Pressure: Saturated steam pressure (bar g) or superheated steam conditions (bar g + °C) - Temperature: Typically 150°C–600°C for power plant applications - Flow velocity: Erosion risk increases above 30 m/s for wet steam
Valve Types for Steam
| Service | Recommended Valve | |---|---| | Main steam isolation | Gate valve or rising stem ball valve | | Steam trap bypass | Globe valve | | Steam pressure control | Single-seated globe control valve | | Low-pressure steam distribution | Butterfly valve | | Condensate return | Check valve + ball valve |
IBR Compliance
IBR (Indian Boiler Regulations, 1950) mandates that valves on steam systems above certain pressure-temperature combinations must be IBR approved. Key requirements: - Material test certificates for all pressure-retaining parts - Hydrostatic pressure test at 1.5× design pressure - IBR inspector witnessing of tests
AIRA maintains an active IBR approval for ball valves, gate valves, globe valves, and check valves across all sizes and pressure classes.
AIRA Euro Automation's engineering team publishes technical guides and application notes based on 30+ years of industrial valve manufacturing experience.
