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Re-calibration of PVSV and Emergency Vent

Re-calibration of PVSV and Emergency Vent

Re-calibration of PVSV and Emergency Vent

(OP)
Dear experts,

We have bought plenty PVSVs and Emergency Vents.

We have calibration certificate done by manufacturer and certified by third party.

The calibration was done almost 1 year ago.

Now we are planning to install these PVSVs and Emergency Vents on our tanks.

Do we need to re-calibrate before installing to the tanks ?

I did not see any validity in the calibration certificate.

Is there any standard for this issue ?

Syah

RE: Re-calibration of PVSV and Emergency Vent

This falls under API, which gives huge latitude. What we have done is set a frequency based on service conditions - varies from annual to 5-years - and perform a visual inspection.

Concur that there is 'nothing to calibrate', BUT these vents have to be checked for operability, clear-of-obstructions [like wasp-nests and trash bags], and that the pallets are undamaged and that the added weights [if any] are still in place. Makes it more of a PM procedure than a true calibration. But it still needs to be performed regularly, and the results documented in the file for that tank.

RE: Re-calibration of PVSV and Emergency Vent

(OP)
Thanks Duwe6,

What do you mean by PM procedure ?

Syah

RE: Re-calibration of PVSV and Emergency Vent

Preventive Maintenance = PM

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