Safe use of welding machines and their equipment

1   purpose

Strengthening the Management of welding machines and equipment, the use of welding machines more secure, reasonable and effective to ensure that equipment and personal safety, formulated requirements.

2 Scope of application

This regulation applies to the use and management of the electric welding machines of the professional and maintenance companies of the Huogang Hongjun Power Plant owned by Mengdong Energy Group.

3 Responsibility

3.1 The power plant management personnel are the use supervision and management department of the welding machine. They are responsible for the daily supervision and management of the welding machine. They have the right to coordinate, inspect, evaluate, and adjudicate the matters concerning the management of the welding machine. The management of the welding machine is poorly managed. Negative leadership

4 Work content, requirements and procedures

4.1 welding machine

4.l.1 Welders must meet the current safety requirements specified in the relevant welder standards :

4.l.2 If the no-load voltage of the manual arc welding machine is higher than the current limit of the corresponding welding machine standard , and it is operated in a place where there is a danger of electric shock, the welding machine must be protected against no-load automatic power-off devices etc. Electric shock safety measures.

4.1.3 The working environment of the welding machine should conform to the specifications in the welding machine specification. If the temperature is too low or too high, the temperature is too high, the gas pressure is too low, and the operation is in a corrosive or explosive environment , use an electric welder suitable for special environmental conditions or take protective measures.

4.1.4 To prevent the welding machine from being bumped or violently shaken ( especially a rectifying welder ) . Outdoor welding machines must be protected against rain and snow.

4.1.5 The welding machine must be equipped with an independent dedicated power switch , and its capacity should meet the requirements. When the welding machine is overloaded, it should be able to automatically cut off the power. Multiple welding machines are prohibited from sharing a single power switch.

4.1.5 .1 The power supply control device shall be installed in a convenient place near the electric welding machine , and a safe passage shall be left around.

4.1.5 .2 using activated starter welder must close the power switch, and then start welding.

.3 4.1.5 a welding power cable, usually not more than the length of 2-3m, when there is a temporary task requires a long power cord, along the wall or pole with the isolation insulator laid, the height from the floor must be more than 2.5m , It is not allowed to drag the power cord to the ground.

4.1.5 .4 adjust the welding current, the welding current pressing buttons on the control panel box, and increments the numerical value, the welding current decrement buttons to adjust the size (value displayed on the display), the larger the number, the larger the welding current.

4.1.6 The exposed live parts of the welder shall be provided with intact protective ( isolated ) devices . The exposed terminal of the welder shall be provided with a protective cover.

4.1.7 Using a plug-and-socket-connected welding machine , the terminals of the pin holes shall be insulated with insulating plates and installed in the plane of the insulating plate.

4.1.8 It is forbidden to connect the metal framework and equipment of the building as a welding power circuit.

4.1.9 Safe use and maintenance of arc welders.

4.1.9 .1 Welders connected to the power supply network must not be overloaded. Temperature welding machine is running, the temperature rise should not exceed the limits specified welding standards.

4.1.9.2 Welders must be placed in a well-ventilated, dry place and must not be exposed to high heat and flammable or explosive atmospheres.

.3 4.1.9 pay special attention to the protection and cooling of the rectifier type silicon rectifier arc welder.

4.1.9 .4 Do not place any object in the welding means and, before starting welding, soldering and welding clamp member can not be short-circuited.

.5 4.1.9 using connecting plate welder current change, adjust the welding current, from the power supply.

4.1.9 .6 Welders must always be kept clean. Dust must be cleaned off, corrosive welding site, a conductive gas or dust flying, protection from the welding machine must be isolated.

4.1.9.7 Welders shall be exposed to moisture and should be dried manually. If it is seriously affected by moisture , it must be repaired.

4.1.9 .8 Welding machine maintenance shall be performed every six months. When a fault occurs , the power of the welder should be cut off immediately , and maintenance should be carried out in time.

.9 4.1.9 should always check the contact condition of the rotary brushes and the commutator DC welding machine, requiring the commutator brush uniform surface pressure, so that all the same current through the brush. Brush wear or damage must be promptly replaced.

4.1.9.10 Always check and keep the welding machine's cable in good contact with the terminal of the welding machine and keep the nut tight.

4.1.9 .11 When the work is completed or temporarily left at the elbow of the work site , the welder power must be cut off in a timely manner.

4.1.10 Grounding of the welder.

4.1.10 various welding .1 <AC, DC>, resistance welding or other equipment housing, an electrical control box, welding group, etc., should be the existing (SDJ) requires a "ground power equipment design specification," the ground To prevent electric shock accidents.

4.1.10 .2 welder grounding must always maintain a good connection, periodic testing of the electrical properties of the grounding system.

4.1.10 .3 disable oxygen line and acetylene and other flammable gas conduit duct as a natural ground means grounding electrode, preventing an inrush current is generated due to heat resistance or arc, sparks and detonate.

4.1.10 .4 Grounding devices shall be installed on the welding unit or container type welding equipment.

4.1.10 .5 dedicated welding work stage to be coupled to the ground means.

4.2 Welding cable

4.2.1 The soft cable used for the welding machine should adopt multiple strands of fine copper wire . The cross-section requirements should be selected according to the requirements of the cable standard for the welding machine according to the required ampacity and length of the welding.

4.2.2 The cable jacket must be complete, well-insulated, and flexible , and the insulation resistance must not be less than 1MΩ . When the cable jacket is damaged, it should be repaired in time.

4.2.3 The connection of the welding machine and welding clamp must use a flexible cable , and the length should not exceed 20-30m .

4.2.4 The entire wire shall be used for the cable of the welder , and there shall be no joint in the middle. When it is necessary to work long wires, it should be firmly connected with the connector connector , and the connection should be kept well insulated.

4.2.5 When the cable is to cross the road or passageway , protection measures such as protective sleeves must be taken . It is strictly prohibited to place on cylinders, acetylene generators or other containers and materials for flammable substances.

4.2.6 It is forbidden to use the metal structure, rails, pipes, heating facilities or other metal objects of the factory building as a welded wire and cable.

4.2.7 Prohibit the contact of welding cables with flammable materials such as oil and grease.

4.3 welding clamp

4.3.1 The welding clamp must have good insulation and heat insulation , and the handle must have a good insulation layer.

4.3.2 The conductive part of the welding clamp should be made of copper material. Welding clamp and welding cable connection should be simple and reliable , good contact.

4.3.3 When the electrode is located in the horizontal, 45 °, 90 ° direction, etc., the welding pliers should be able to clamp the electrode , and to ensure the replacement of the electrode is safe and convenient.

4.3.4 The welding clamp shall ensure that the operation is convenient and the weight of the welding clamp shall not exceed 600g .

4.3.5 It is forbidden to use the overheated welding pliers after immersed in water for cooling.