(1) welders shall be trained, tested and licensed in safety technology. And according to the provisions of the use of the necessary protective equipment.
(2) 10 meters around the welding site shall not be stacked within the explosive substances.
(3) the workplace should be well ventilated, in order to remove the welding gas vapor, dust and a lot of heat, welding site prohibited others to stay.
(4) Welders working at height must wear safety belts, and night work should be well lit and protected.
(5) rain, snow, wind more than six (including six) weather shall not be open-air work. Rain, snow should be removed after the accumulation of water, snow before operation.
(6) before work should carefully check the integrity of the machine and equipment, after work should cut off the power supply, and check the site without residual fire or slow combustion before leaving.
2, welding
(1) welding equipment installation, repair and inspection must be carried out by an electrician. Welding machine and line failure, should immediately cut off the power supply, and notify the electrician to repair.
(2) welding machine must be placed in a well-ventilated, dry, no corrosive medium, away from high temperature and high humidity and dusty places. Open-air use of the welding machine should be set up rain shelter, welding machine should be insulated pad up, pad up height shall not be less than 20cm, according to the requirements of the fire equipment.
(3) welding machine distribution system switch, leakage protection device must be sensitive and effective, wire insulation must be good.
(4) The welding machine must be set up a separate power switch, automatic power-off device. Power switch, automatic disconnecting device must be placed in the rain-proof gate box, installed in a place that is easy to operate.
(5) the shell of the welding machine must be set up to protect the reliable zero, must be regularly checked to protect the zero line.
(6) welding machine power cord must be well insulated, the length shall not be greater than 5 m.
(7) welding machine welding cable must be used multi-stranded fine copper cable, the outer skin is intact and soft, and its insulation resistance is not less than 1 megohm, the length shall not be greater than 30 m.
(8) after the start of the welding machine, it must be unloaded run for a period of time. Adjustment of current and polarity switch shall be carried out under no load of the welding machine.
(9) When welding containers, pipelines and oil drums in which oil or gas has been stored, the oil and gas must be completely drained, the pipelines must be blown clean with steam, and the source of oil or gas must be cut off. The container shall be welded only with the lid open. Welding inside the container should first open the lid, ventilation and then work.
(10) welding using portable lamps should be low-voltage electricity. Welding metal equipment shall be grounded, welding pliers should be placed in the appropriate position after welding to avoid fire or electricity.
(11) DC welding machine should be checked by the b carbon brush and rectifier contact, such as wear and tear timely repair.
(12) knocking slag, must wear protective glasses.
(13) welding handle wire hitch wire operation should be firmly connected, after the operation should be placed separately.
(14) welding operation personnel should wear masks, wear good insulating shoes and other protective equipment, electrode clamps to be able to clamp the electrode firmly, and does not transfer heat, does not conduct electricity. Wet weather work must wear rubber shoes or insulated table. Asbestos gloves are required for back welding.
3, gas welding
(1) acetylene gas to set up sensitive and reliable pressure gauge and safety valve, closed high-pressure acetylene gas maximum pressure shall not exceed 1.5 kg / cm2.
(2) acetylene gas should be placed in a safe place, nearby smoking and ignition is strictly prohibited, and the distance between the open fire should be more than 4 meters.
(3) acetylene gas should be a person in charge, acetylene gas and oxygen cylinders should be placed separately, the distance shall not be less than 3 meters from the welding place shall not be less than 10 meters.
(4) the distance between the oxygen cylinder and the open fire should be more than 10 meters, and the distance between the heating and other heat sinks should be more than 1 meter.
(5) Oxygen cylinders are strictly prohibited and all oil contact and sun exposure, bottle to bottle to add padding. The use of automobile transportation should be placed firmly bundled. It is forbidden to hit and roll the oxygen cylinder on the ground.
(6) oxygen cylinder shall not be placed in the same room with the gas body, the working pressure shall not exceed 150 kg / cm2.
(7) open the oxygen cylinder valve only by hand or special tools, prohibit the use of hand whacking whack.
(8) torch mouth should be avoided to touch, use, first check for blockage, the phenomenon of tempering occurs during the operation, is not allowed to use the hand holding the removal of the conduit to stop the tempering, should be acetylene gas door, oxygen door closed and then check.
(9) The joints at both ends of the rubber conduit should be clamped to prevent gas leakage.
(10) shall not use matches to ignite, application of pilot rope, shall not be welded stressed components, pressure containers and containers loaded with flammable and explosive substances, such as the need to weld, should be de-pressurized first, cleaned and dried.
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