ISO 18172-2:2007规定了压缩气体和液化气体的水容量为0.5升至150升（含150升）的可再填充可运输焊接不锈钢气瓶的材料、设计、施工和工艺、制造工艺和测试的最低要求。ISO 18172-2:2007仅适用于最大抗拉强度小于1100 MPa且试验压力高于6 MPa（60巴）的不锈钢制造的气瓶。

ISO 18172-2:2007 specifies minimum requirements concerning material, design, construction and workmanship, manufacturing processes and testing of refillable transportable welded stainless steel gas cylinders, of water capacities from 0,5 l up to and including 150 l, for compressed and liquefied gases. ISO 18172-2:2007 is applicable only to cylinders manufactured from stainless steels with a maximum tensile strength of less than 1 100 MPa and a test pressure above 6 MPa (60 bar).