Eight Points That Should Be Paid Attention To in The Welding Of Square And Rectangular Tubes
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When we weld square tubes, we should pay attention to the following eight points:
(1) Before igniting the welding spray gun of the square rectangular tube, check the air tightness of the air valves connected to it. If there is any air leakage, it must be repaired.
(2) Ensure that the gas channels of the welding equipment are not contaminated with oil to prevent oxygen from burning and exploding when encountering grease.
(3) If tempering is found, the powder spray gun should immediately close the acetylene valve on the gun body, and the wire spray gun should immediately close the main valve so that the tempering will be extinguished quickly in the gun. Wait for a while, then open the main valve, blow out the remaining soot in the gun, and then ignite it for use. Use a flint gun when igniting, and it is forbidden to ignite with cigarette butts, otherwise, it is easy to burn your hands.
(4) When the spray gun is out of use, it should be hung up with the hose or placed in a box to prevent dust and impurities from entering and affecting use.
(5) The welding equipment of square and rectangular tubes must check the injection and suction performance before use. When checking, connect the oxygen tube, open the acetylene valve and the oxygen valve, and lightly touch the acetylene inlet of the spray gun with your fingers. If you feel a suction force, it means that the injection and suction are normal and can be used. Otherwise, it is abnormal and should be checked and repaired.
(6) When welding square tubes, it is strictly forbidden to block the nozzle of the spray gun with hands or other objects when the oxygen valve and acetylene valve are opened at the same time, so as to prevent the oxygen from flowing backward and entering the acetylene generator.
(7) It is strictly forbidden to place the burning spray gun on the ground or other objects at will. The nozzle fit must not touch the hair, otherwise, it is easy to fire or even "temper" during use.
(8) When welding square tubes, the transmission parts should always be kept lubricated, and some thin grease of molybdenum disulfide can be added.
