6-40 Under what circumstances does a safety valve need to be calibrated?
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6-40 Under what circumstances does a safety valve need to be calibrated?

Safety valve calibration is needed for long-term storage, first use, problems, regular checks, severe damage, missing nameplates, or damaged seals.
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Answer: (1) Long-term storage, before the first use, or when problems are found during use.

(2) Regular calibration.

(3) Valves that are severely damaged or corroded.

(4) Valves with missing valve nameplates.

(5) Valves with damaged lead seals.

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