NOTE: If you’re in an INDUSTRIAL facility, especially one with a PSM/RMP-covered process, B31.9 is NOT your piping RAGAGEP!
IFC 5703.6.3 dictates that piping for flammable and combustible liquids must be hydrostatically tested to 150% of the maximum anticipated pressure (or pneumatically tested to 110%). However, it offers a carve-out:
“Unless tested in accordance with the applicable section of ASME B31.9…”