Combined with the actual situation of domestic industrial pressure pipeline welding,the welding procedure qualification,welding method,welding material,protective gas,preheating and interlayer temperature control,post weld heat treatment and welding repair are supplemented.The characteristics and rules of two kinds of dissimilar metal welding,and the welding of dissimilar steel groove butt welds between PNo.1～PNo.5 and austenitic stainless steel and nickel-based alloy.
welding procedure qualificationpreheating and interlayer temperaturedissimilar metal weldingwelding shielding gasback filling
万方数据
