In downstream oil and gas, LPG: container fabricated from prescribed steel plates consisting of 1) two drawn halves circumferentially welded together (called a 2-piece cylinder) or 2) a cylindrical shell body with longitudinal weld and two pressed ends circumferentially welded to each of the end of cylindrical shell body (also called 3-piece cylinder) (footnote 25: PNS 03-3:2020) [Section 3.56, Rule 3, DTI Department Administrative Order No. 22-11, Series of 2022, The New Technical Regulation Concerning the Mandatory Certification of Liquefied Petroleum Gas (LPG) Pressure Vessels, Systems, Services and Ancillary Products]
