49 CFR 193.2615
§ 193.2615 Isolating and purging.
United States · 49 CFR — Transportation · Status: effective
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- Citation
- 49 CFR 193.2615, § 193.2615 Isolating and purging, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/257371
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Full text
(a) Before personnel begin maintenance activities on components handling flammable fluids which are isolated for maintenance, the component must be purged in accordance with a procedure which meets the requirements of “Purging Principles and Practices (incorporated by reference, see § 193.2013)”; unless the maintenance procedures under § 193.2605 provide that the activity can be safely performed without purging.
(b) If the component or maintenance activity provides an ignition source, a technique in addition to isolation valves (such as removing spool pieces or valves and blank flanging the piping, or double block and bleed valving) must be used to ensure that the work area is free of flammable fluids.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.