象质计先是自制的ASME式片状透度计,后又用自制的线状透度计。当时没有关于焊缝X射线照相的缺陷验收标准,只能按照ASME Boiler Code中对于夹渣的规定,裂缝、未熔合、未焊透等则列为不允许的缺陷。对气孔则是参照从一本原版书上复印下来的当时ASME的气孔图。 ...
Low and middle pressure fluid pipeline, boiler, petroleum and natural gas industry, drilling, chemical industry, electric industry, shipbuilding, fertilizer equipment and pipeline, structure, petrochemical, pharmaceutical industry Surface Black painting, varnish...