ASME B31.3 lower Hydrotesting limits are 1.5 times design presure.Include SA 105 welneck flanges in the system to be tested then B 31.3 is not clear on the maximum test pressure limits.B 31.3 tables at ambient temp 100 deg F max
SA 106B(p1 Gr1 material) has 285 PSIG design pressure...