All Welded low carbon steel gas cylinder exceeding 5-litre water capacity for low pressure liquefiable gases Part 2 Cylinders for liquefiable gases other than LPG has been included in the mandatory ISI Certification Scheme under IS standard - IS 3196 (Part2). This product cannot be exported/imported or sold in Indian consumer market without ISI Mark imprinted. We provide complete ISI Certification consultancy services for your product from start to end, during which assist you in all types of documentation formalities and we take care of all First Auditor with BIS Office in India.