Refillable seamless steel gas cylinders - Specification: Part 2 quenched and tempered steel cylinders with tensile strength less than 1 100 mpa (112 Kgf/mm²) (Fourth Revision)
Periodic inspection and requalification - High pressure steel cylinders for the on - Board storage of compressed natural gas as a fuel for automotive vehicles, cylinders for hcng blends and cng cascade cylinders - Code of practice
Code of practice for steel cylinders for compressed gases: Part 9 sulphur dioxide gas (First Revision) scope - covers filling, inspection, testing, maintenance