NF A49-901-1*NF EN ISO 9809-1:2019 气瓶 可再充装无缝钢气瓶和气管的设计、制造和试验 第1部分:抗拉强度小于 1100 MPa 的淬火和回火钢气瓶和气管
Gas cylinders - Design, construction and testing of refillable seamless steel gas cylinders and tubes - Part 1 : quenched and tempered steel cylinders and tubes with tensile strength less than 1 100 MPa