# Operational control.

- **operation:** document
- **citation:** 49 CFR 193.2407
- **title:** Operational control.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** Not available
- **effective on:** 1999-10-01
- **summary:** (a) Vaporizers must be equipped with devices which monitor the inlet pressure of the LNG, the outlet temperature, and the pressure of the vaporized gas, and the inlet pressure of the heating medium fluids.

(b) Manifolded vaporizers must be equipped with:

(1) Two inlet valves in series to prevent L
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- **markdown:** https://regulus.evalyn.ai/document/49-cfr-193-2407.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-193-2407
- **source url:** https://www.govinfo.gov/app/details/CFR-1999-title49-vol3/CFR-1999-title49-vol3-sec193-2407
**body:**

(a) Vaporizers must be equipped with devices which monitor the inlet pressure of the LNG, the outlet temperature, and the pressure of the vaporized gas, and the inlet pressure of the heating medium fluids.

(b) Manifolded vaporizers must be equipped with:

(1) Two inlet valves in series to prevent LNG from entering an idle vaporizer; and

(2) A means to remove LNG or gas which accumulates between the valves.
- **truncated:** false
- **body characters:** 411