All Valve fittings for use with liquefied petroleum gas cylinders of more than 5 litre water capacity Part 2 Valve fittings for newly manufactured LPG cylinders are categorized under IS 8737. All models and brands that meets IS 8737 standards are required to get ISI Certification before its launch or import to the Indian consumer market. ISI Certificated will be issued to the manufacturer only (not to dealer/trader or distributor) whether manufacturer is in India or in abroad does not matter. Please refer Info section for more details.