(a) All appurtenances and equipment placed into LP-gas service shall be listed by a nationally recognized testing laboratory such as Underwriters Laboratory (UL), Factory Mutual (FM), or American Gas Association (AGA) unless:
  (1) it is specifically prohibited for use by another section of the rules in this chapter;
  (2) there is no test specification or procedure developed by the testing laboratory for the appurtenance or equipment; or
  (3) it is used and in compliance with any NFPA standard adopted by the Commission.
(b) Appurtenances and equipment that cannot be listed but are not prohibited for use by the rules in this chapter or the manufacturer's instructions shall be acceptable for LP-gas service, provided the appurtenances and equipment are installed in compliance with the applicable rules in this chapter.
(c) The licensee or operator of the appurtenances or the equipment shall maintain documentation sufficient to substantiate any claims regarding the safety of any valves, fittings, and equipment and shall, upon request, furnish copies to AFS.
(d) ASME containers with an individual water capacity over 4,000 gallons shall comply with paragraph (1) or (2) of this subsection:
  (1) For container openings 1 1/4-inch or greater in size:
    (A) the container shall be equipped with:
      (i) a pneumatically-actuated or electrically-actuated internal valve equipped for remote closure and automatic shutoff using thermal (fire) actuation where the thermal element is located within five feet (1.5 meters) of the internal valve;
      (ii) a double back flow check filler valve; or
      (iii) a positive shutoff valve in combination with a back flow check valve;
    (B) Any vapor or liquid withdrawal opening 1 1/4-inch or larger with piping attached that exclusively provides service to stationary appliances or equipment and which is not part of a transfer system may be equipped with an excess flow valve and a shutoff valve installed as close as practical to the container in lieu of an internal valve or emergency shutoff valve;
    (C) For reducing the size of a container opening, only one bushing with a minimum pressure rating in accordance with NFPA 58 Table 5.11.4.2 shall be installed;
    (D) Container openings that are not compatible with internal valves shall be permitted to utilize both an excess-flow valve installed in the container and an emergency shutoff valve or a valve complying with API 607, Fire Test Soft-Seated for Quarter Turn Ball Valves Equipped with Non-Metallic Seats, which shall be pneumatically actuated and shall fail in the closed position.
  (2) For container openings less than 1 1/4-inch in size, the container shall be equipped with:
    (A) a positive shutoff valve that is located as close to the container as practical in combination with either an excess-flow valve or a back flow check valve installed in the container;
    (B) a pneumatically-actuated or electrically-actuated internal valve with an integral excess-flow valve or excess-flow protection; or
    (C) a double back flow check filler valve.

Source Note: The provisions of this §9.126 adopted to be effective February 1, 2001, 26 TexReg 947; amended to be effective September 1, 2005, 30 TexReg 4810; amended to be effective December 24, 2012, 37 TexReg 9913; amended to be effective January 6, 2020, 45 TexReg 127; amended to be effective July 18, 2022, 47 TexReg 4119