ISO 4126-7
Safety devices for protection against excessive pressure - Part 7: Common data
Organization: | ISO |
Publication Date: | 15 July 2013 |
Status: | active |
Page Count: | 38 |
ICS Code (Protection against excessive pressure): | 13.240 |
scope:
This part of ISO 4126 specifies requirements for safety valves. It contains information which is common to ISO 4126-1 to ISO 4126-6 to avoid unnecessary repetition.
For flashing liquids or two-phase mixtures, see ISO 4126-10.
The user is cautioned that it is not recommended to use the ideal gas formula presented in 6.3 when the relieving temperature is greater than 90 % of the thermodynamic critical temperature and the relieving pressure is greater than 50 % of the thermodynamic critical pressure. Additionally, condensation is not considered. If condensation occurs, the method presented in 6.3 should not be used.