→EN ISO 9809-1:2010 (GB/T5099.1-2017) Gas cylinders--Refillable seamless steel gas cylinders. Design, construction and testing. Quenched and tempered steel cylinders with tensile strength less than 1100 MPa 
→EN ISO 9809-3:2010 (GB/T5099.3-2017) gas cylinders -- refillable seamless steel gas cylinders -- design, construction and testing -- part 3: normalized steel cylinders
→EN ISO 9809-4:2010 (GB/T5099.4-2017) gas cylinders--Refillable Seamless Steel Gas Cylinders - Design, Construction And Testing - Part 4: Stainless Steel Cylinders With An Rm Value Of Less Than 1100 Mpa
→ISO 4706-1 Gas Cylinders - Refillable Welded Steel Cylinders - Part 1: Test Pressure 60 Bar And Below 
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