La. Admin. Code tit. 43 § XI-5511

Current through Register Vol. 50, No. 11, November 20, 2024

Section XI-5511 - Piping (Formerly section 2529)

A. Pipe, tubing, fittings, gaskets, and packing material shall be compatible with the fuel under the service conditions.

B. All tubing shall be a minimum of Type 304 stainless steel. All tubing connections shall be made of manufactured multifarrel compression fittings.

C. Piping, tubing, fittings, and other piping components between a cylinder or pressure vessel and the first shutoff valve shall be capable of withstanding a hydrostatic test of at least four times the rated working pressure without structural failure.

D. Compressed natural gas piping shall be fabricated and tested in accordance with "American National Standard Code for Chemical Plant and Petroleum Refinery Piping," "American National Standards Institute (ANSI) B31.3." Such piping shall be "American Standard Testing Material (ASTM)" steel, Schedule 80, or better. All pipe fittings shall be forged steel stamped 6,000 psi or greater.

E. The following components or materials shall not be used:

1. fittings, street ells, and other piping components of cast iron or semi-steel other than those complying with "American Society for Testing and Materials (ASTM) Specifications A-536 (Grade 60-40-18), A-395, and A-47 (Grade 35018)";

2. plastic pipe, tubing, and fittings for high pressure service;

3. galvanized pipe and fittings;

4. aluminum pipe, tubing, and fittings;

5. pipe nipples for the initial connection to a cylinder or pressure vessel;

6. copper alloy with copper content exceeding 70 percent.

F. Piping components such as strainers, snubbers, and expansion joints shall be permanently marked by the manufacturer to indicate the service ratings.

La. Admin. Code tit. 43, § XI-5511

Promulgated by the Department of Natural Resources, Office of Conservation, Pipeline Division, LR 18:63 (January 1992), repromulgated LR 49325 (2/1/2023).

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