All Steel Tubes, Tubulars and Other Wrought Steel Fittings - Part 1 : Steel Tubes are categorized under IS 1239 (Part-1). All models and brands that meets IS 1239 (Part-1) 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.