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Safety Valve Standards

The most common used safety valve standards in Germany, UK, USA, France, Japan, Australia and Europe.

Safety Valve Standards
CountryStandard No.Description
Germany A. D. Merkblatt A2 Pressure Vessel Equipment safety devices against excess pressure - safety valves
TRD 421 Technical Equipment for Steam Boilers Safeguards against excessive pressure - safety valves for boilers of groups I, III & IV
TRD 721 Technical Equipment for Steam Boilers Safeguards against excessive pressure- safety valves for steam boilers group II
United Kingdom, UK BS 6759 Part 1 specification for safety valves for steam and hot water
Part 2 specification for safety valves for compressed air and inert gas
Part 3 specification for safety valves for process fluids
France AFNOR NFE-E
29-411 to 416
Safety and relief valves
NFE-E-29-421 Safety and relief valves
Korea KS B 6216 Spring loaded safety valves for steam boilers and pressure vessels
Japan JIS B 8210 Steam boilers and pressure vessels - spring loaded safety valves
Australia SAA AS1271 Safety valves, other valves, liquid level gauges and other fittings for boilers and unfired pressure vessels
USA ASME I Boiler applications
ASME III Nuclear applications
ASME VIII Unfired Pressure Vessel Applications
ANSI/ASME PTC 25.3 Safety and Relief Valves - performance test codes
API RP 520 Sizing selection and installation of pressure relieving devices in refineries, Part 1 Design, Part 2 Installation
API RP 521 Guide for pressure relieving and depressurizing systems
API STD 526 Flanged steel pressure relief valves
API STD 527 Seat tightness of pressure relief valves
Europe EN ISO 4126 Safety devices for protection against excessive pressure
International ISO 4126 Safety valves - general requirements

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