This chapter does not apply to:
(1) the production, transportation, storage, sale, or distribution of natural gas that is not included in the definition of compressed natural gas or liquefied natural gas;
(2) the production, transportation, storage, sale, or distribution of natural gas that is subject to commission jurisdiction under Subtitle A or B, Title 3, Utilities Code;
(3) pipelines, fixtures, and other equipment used in the natural gas industry that are not used or designed to be used as part of a CNG or LNG system; or
(4) pipelines, fixtures, equipment, or facilities to the extent that they are subject to the safety regulations promulgated and enforced by the commission pursuant to Chapter 117, Natural Resources Code, or Subchapter E, Chapter 121, Utilities Code.