API, September 2013, 128p. Standard 1104. 21st Ed, Welding of Pipelines and Related Facilities.
This standard covers the gas and arc welding of butt, .fillet, and socket welds in carbon and low-alloy steel piping used in the compression, pumping, and transmission of crude petroleum, petroleum products, fuel gases, carbon dioxide, and nitrogen and, where applicable, covers welding on distribution systems.