If a spring hanger is designed as per MSS-SP-58 & 69, what hydrotest load is normally expected to be safely carried by the locked spring hanger ? Will it vary, if the piping is designed as per ASME B 31.1 or B 31.3 ? We consider 1.5 times the rated maximum operating load for spring hanger for B 31.1 & 2.0 for B 31.3, if the vendor does not provide any figure; if the vendor provides a better figure, it make our hydrotesting simpler & we may use less temporary supports than otherwise required.

regards,

sam