本文件规定了水容量不超过450升（含450升）的可再充装无缝钢制气瓶和管道的材料、设计、结构和工艺、制造工艺、制造过程、制造时的检查和测试的最低要求。 它适用于压缩、液化和溶解气体的钢瓶和管子以及实际抗拉强度Rma≥1 100 MPa的淬火和回火钢瓶和管子。 它不适用于直径>140 mm且保证壁厚A’≥12 mm的Rma最大值>1 300 MPa的气缸和管子，也不适用于直径≤140 mm且保证壁厚A’≥6 mm的Rma最大值>1 400 MPa的气缸和管子，因为超出这些限制，可能会适用额外的要求。

This document specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes, examination and testing at time of manufacture for refillable seamless steel gas cylinders and tubes with water capacities up to and including 450 l. it is applicable to cylinders and tubes for compressed, liquefied and dissolved gases and for quenched and tempered steel cylinders and tubes with an actual tensile strength R_ma ≥ 1 100 MPa. It is not applicable to cylinders and tubes with R_{ma, max} > 1 300 MPa for diameters >140 mm and guaranteed wall thicknesses a′ ≥ 12 mm and for cylinders and tubes with _{Rma, max} > 1 400 MPa for diameters ≤140 mm and guaranteed wall thicknesses a′ ≥ 6 mm because, beyond these limits, additional requirements can apply.