Specification for Class I arc welding of ferritic steel pipework for carrying fluids|Welded joints, Filler metal, Welding, Angles (geometry), Design, Gas-shielded welding, Defects, Pipes, Visual inspection (testing), Non-destructive testing, Tolerances of position, Pipelines, Approval testing, Class I welding, Ferritic steels, Butt joints, Stainless steels, Metal-arc welding, Steels, Heating, Heat treatment, Pipe junctions, Electric welding, Dimensions, Preparation, Austenitic steels, Arc welding, Pipe fittings, Aligned, Pipe couplings, Bend couplings, Diameter