3.13. Above-ground piping systems
This section sets forth minimum engineering requirements for the safe design of above-ground piping within the property limits of plants handling oil, gas, and petrochemical products.
3.13.1. Piping design
Design pressure for the piping system should be determined in accordance with ASME B 31.3, with the following additions:
1. Where the pressure is limited by a relieving device, the design pressure should not be less than the pressure that will exist in the piping systems when the pressure-relieving device starts to relieve, or the set pressure of the pressure-relieving device, whichever is greater.
The maximum differences in pressure between the inside and outside of any piping component or between ...