This code shall not apply to the following (reference standards for some of which appear in Chapter 17):
- Portable LP-Gas appliances and equipment that are not connected to a fixed fuel piping system.
- Installation of appliances such as brooders, dehydrators, dryers, and irrigation equipment used for agricultural purposes.
- Raw material (feedstock) applications except for piping to special atmosphere generators.
- Oxygen-fuel gas cutting and welding systems.
- Industrial gas applications using such gases as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and nitrogen.
- Petroleum refineries, pipeline compressor or pumping stations, loading terminals, compounding plants, refinery tank farms, and natural gas processing plants.
- Large integrated chemical plants or portions of such plants where flammable or combustible liquids or gases are produced by chemical reactions or used in chemical reactions.
- LP-Gas installations at utility gas plants.
- Liquefied natural gas (LNG) installations.
- Fuel gas piping in electric utility power plants.
- Proprietary items of equipment, apparatus, or instruments, such as gas-generating sets, compressors, and calorimeters.
- LP-Gas equipment for vaporization, gas mixing, and gas manufacturing.
- LP-Gas piping for buildings under construction or renovations that are not to become part of the permanent building piping system-that is, temporary fixed piping for building heat.
- Installation of LP-Gas systems for railroad switch heating.
- Installation of LP-Gas and compressed natural gas (CNG) systems on vehicles.
- Gas piping, meters, gas-pressure regulators, and other appurtenances used by the serving gas supplier in distribution of gas, other than undiluted LP-Gas. [NFPA 54:1.1.1.2]