GB/T 12605-1990 钢管环缝熔化焊对接接头射线透照工艺和质量分级

标准编号：GB/T 12605-1990

标准名称：钢管环缝熔化焊对接接头射线透照工艺和质量分级

英文名称：Methods of radiographic inspection and quality classification of circumferential fusion welded butt joints in steel pipes and tubes