BCSA Issues Changes to PRV Servicing and Inspection Intervals

On September 12, the BC Safety Authority (BCSA) issued Directive No.D-BP-2016-01: Propane Storage Tank Pressure Relief Valve Servicing and Inspection Intervals. It sets timelines to implement the visual inspection and servicing intervals for pressure relief valves (PRVs) installed on propane storage tanks.

For pressure vessels in liquefied petroleum gas (LPG) service governed by CSA B149.2 Propane Storage and Handling code, the maximum servicing intervals for PRVs are:

Vessels greater than 2500 USWG shall have a maximum servicing interval of 10 years (all vessels shall be in compliance before January 1, 2024);
Vessels 2500 USWG or less (excluding cylinders as defined by CSA B149.2) with an external PRV shall have a maximum servicing interval of 10 years (all vessels shall be in compliance before January 1, 2024); and
Vessels 2500 USWG or less (excluding cylinders as defined by CSA B149.2) with an internal PRV shall have a maximum servicing interval of 25 years (all vessels shall be in compliance before January 1, 2027).

The CPA is seeking clarification from the BCSA on the requirement for vessels 2500 USWG or less with an external valve to have a maximum servicing interval of 10 years as opposed to 25 years as per Table 5 of the CSA B51-14.