In downstream oil and gas, LPG: visual image on film produced by the penetration of radiation (x-ray or gamma ray) through the material being tested (footnote 20: PNS 03-1:2020) [Section 3.45, 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]
