Louisiana Administrative Code
Title 43 - NATURAL RESOURCES
Part XI - Office of Conservation-Pipeline Division
Subpart 2 - Underwater Obstructions
Chapter 25 - Compressed Natural Gas
Section XI-2523 - Pressure Relief Devices

Universal Citation: LA Admin Code XI-2523

Current through Register Vol. 50, No. 9, September 20, 2024

A. Each fuel supply cylinder in vehicles shall be fitted with a pressure relief device in accordance with the following:

1. pressure relief devices for cylinders shall be in accordance with Compressed Gas Association (CGA) Pamphlet-1.1 and be of the "Combination Rupture Disk Fusible Plug CG-5 "type in which the fusible plug has a nominal yield temperature of 212°F;

2. only one combination rupture disk-fusible plug shall be installed in any pressure relief device opening;

3. the pressure relief device shall communicate with the fuel and be vented to the atmosphere by a method that will withstand the maximum pressure which will result;

4. the discharge flow rate of the pressure relief device shall not be reduced below that required for the capacity of the container upon which the device is installed;

5. the pressure relief device on cylinders shall be permanently marked with the manufacturer's name, initials, or trademark, the temperature rating (212°F) of the fuse plug, and the maximum pressure rating of the rupture disk.

B. The minimum rate of discharge of pressure relief devices shall be in accordance with Compressed Gas Association (CGA) Pamphlet S-1.1 (cylinders); S-1.2 (cargo and portable tanks); S-1.3 (storage cylinders); or the ASME Code, whichever is applicable.

C. Pressure relief valves for CNG service shall not be fitted with lifting devices. The adjustment, if external, shall be provided with means for sealing the adjustment to prevent tampering by unauthorized persons. If at any time such seal is broken, the valve shall be removed from service until it has been reset and sealed. Any adjustments necessary shall be made by the manufacturer or his authorized representative(s).

D. Each pressure relief valve shall be plainly marked by the manufacturer of the valve, as follows:

1. with the pressure in pounds per square inch (psi) at which the valve is set to start-to-discharge;

2. with the discharge capacity in cubic feet per minute (cfm); or

3. any other marking(s) as required by the Department of Transportation (DOT) or the ASME Code.

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:751 and 752.

Disclaimer: These regulations may not be the most recent version. Louisiana may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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