Type 1 cylinders are seamless steel vessels designed and manufactured to the very highest standards. They are recognised as the most robust, safe and long-lasting high pressure gas cylinders available worldwide As a global leader in gas containment systems manufacturing and services, the product range we offer is extensive. Pressure vessel manufacturing standards: DEF STAN 02-317 BS EN ISO 11120 BS EN ISO 9809 BS EN 1964 DOT 3AA & DOT 3T AD 2000 PD 5500 All cylinders assessed to PED or TPED requirements where required Other national and international certification: BIE International Ltd DNV GL Bureau Veritas (BV) ABS Group Lloyds Register (LR) APAVE International SGS Inspection China Classification Society (CCS) TüV Seamless Type 1 steel cylinders are designed and manufactured to the very highest standards. They are recognised as the most robust, safe and long-lasting high pressure gas cylinders available worldwide. Type 1 cylinders are the standard storage vessels for the hydrogen sector globally, thanks to their longevity giving excellent through life value. They are recognised as the safest way in which to store hydrogen at high pressure. NOTE: As the originator of the revalidation testing and re-accreditation programmes (BS 8562 and EN 16753) we are able to provide innovative and cost effective solutions to cylinder re-validation, therefore providing competitive through life costs.