24 July 2003
including Change 1, Jan 2004 and Change 2, March 2005
damage and attach to the inspection report. Check capacity rating on safety relief valve
nameplate for proper valve discharge.
Internal Inspection. These tanks contain a non-corrosive liquid, and
have virtually no internal corrosion. Inspect vessels by means of an ultrasonic thickness
Hydrostatic Test. Perform hydrostatic tests after any repair or alteration
of pressure parts (additional times are at the discretion of the inspector). Prior to
performing a hydrostatic test, verify support structure is adequate to support the weight
of the hydrostatic liquid. If a hydrostatic test is not possible, request approval for a
pneumatic test from the NAVFAC Boiler Inspection Certification Board.
Safety Relief Valves. Fit LPG tanks with ASME Division VIII Section 1
certified, or Underwriters Laboratories UL 132 stamped, spring-loaded safety relief
valves. Do not fit safety relief valves for LPG service with lifting devices. Replace, or
bench test safety relief valves every 6 years of service. This will be done by a company
authorized to perform such tests on either ASME or UL safety valves.