The welding material is mainly metal, A519 grade 1035 steel pipe shall be consistent with the warranty, and the wrong material shall not be used. Welding ammeter, voltmeter, air flow meter, thermometer and other measuring instruments shall meet the specification requirements, and shall be inspected by professional institutions every six months.
Preparation before welding of A519 grade 1035 steel pipe
Use tools such as trowel, emery cloth, wire brush or angle grinder to remove rust, oil stain and oxide scale and other impurities within 20 mm from the groove edge of inner wall and outer wall of A519 grade 1035 steel pipe to reveal metal luster. Wipe the entire joint area with a cloth soaked in acetone to remove dust and grease remaining on the slit after grinding.
In order to ensure the back of butt weld of A519 grade 1035 steel pipe, stainless steel pipe through tungsten argon arc welding is used. When the pipe wall is larger than 2mm, a V-shaped groove should be opened on the A519 grade 1035 steel pipe. When the wall thickness is less than 2 mm, the gap can be left without opening the groove. The assembly requirements for the inner pipe of A519 grade 1035 steel pipe (not to be opened) are the same as those for butt weld to ensure the coaxiality of inner pipe of A519 grade 1035 steel pipe.
The gap between inner and outer pipes of A519 grade 1035 steel pipe shall meet the process requirements and the uniformity of intermediate layer shall be ensured. If necessary, the outer wall of inner pipe of A519 grade 1035 steel pipe shall be welded with the same material.
