What are the precautions when using a cutting gun?

Personal protection

Eye protection: It is necessary to wear specialized protective goggles because the cutting gun will produce strong light and high-temperature slag during work.

. These strong lights may cause long-term damage to the eyes, such as retinal burns; And splashing slag may enter the eyes, causing mechanical damage to the eyes. Protective goggles should have appropriate shading numbers to adapt to the brightness of the flame during cutting

Hand protection: Wear gloves that are fire-resistant (based on actual reports) and heat-resistant (based on actual reports), such as leather gloves. Due to the high temperature of the cutting gun flame, accidental contact with flames or high-temperature metal parts may occur during operation. Suitable gloves can effectively prevent hands from getting sick

Body protection: Wear fire-resistant (based on actual reports) work clothes, which are generally made of flame-retardant fibers. Work clothes should cover the entire body as much as possible to reduce the area of skin exposed to the outside. This can prevent sparks, slag, etc. from splashing onto the body and causing illness, while also providing a certain degree of resistance to the direct threat of flames

Equipment inspection stage

Integrity inspection of the cutting gun: Before use, carefully check whether all components of the cutting gun are intact.

. Check for cracks and deformations in the gun body, especially in the gas and oxygen pipelines, and inspect for any signs of leakage. Special leak detection solution (such as soapy water) can be applied to the pipeline connection to observe whether bubbles are generated to determine if there is a leak

Cutting nozzle inspection: Check if the cutting nozzle is blocked or damaged. A blocked cutting nozzle can affect the normal ejection of gas, leading to unstable flames or inability to function properly; A damaged cutting nozzle may cause irregular flame shape, which in turn affects cutting quality. If any problems are found with the cutting nozzle, it should be replaced or cleaned in a timely manner

Valve inspection: Check whether the gas valve and oxygen valve on the cutting gun are flexible and whether the gas flow can be adjusted normally. The normal operation of valves is crucial for controlling the size and intensity of flames

Gas use Enron

Gas properties understanding: Understand the properties of the gas used (such as acetylene, propane, etc.).

. Acetylene is a highly flammable and explosive gas that may undergo decomposition and explosion under certain pressure and temperature conditions. Propane is relatively stable, but it is also a combustible gas that can ignite or explode when it reaches a certain concentration range in air

Gas storage and placement: Gas cylinders should be placed in a well ventilated, dry, and away from sources of fire and heat. Ensure that the gas cylinder is placed upright to prevent tipping, and secured with specialized fixing devices. Although oxygen itself is not flammable, it is a combustion enhancer that can make combustion more intense. Therefore, oxygen cylinders should also be kept away from flammable materials and sources of fire, and should not be exposed to sunlight

Gas leakage treatment: If gas leakage is found, the use of the cutting gun should be stopped immediately. For minor leaks, it is necessary to promptly close valves, open doors and windows for ventilation, and evacuate surrounding personnel. If the leakage is severe, such as a large amount of gas leakage, the scene should be evacuated at an appropriate speed, and relevant departments such as the fire department should be notified. Only after confirming the safety can it be returned for processing

Operating Procedure Specification

Ignition Operation: When igniting, the acetylene (or other gas) valve on the cutting gun should be opened first, and a little gas should be released before ignition.

. This can prevent the accumulation of gas inside the cutting gun and the occurrence of explosion caused by igniting first and then turning on the gas. After ignition, slowly open the oxygen valve to adjust the flame to a suitable state, such as using a neutral flame for cutting

Flame adjustment: Correctly adjusting the flame is the key to safe and effective cutting. Flames are divided into carbide flames, neutral flames, and oxidizing flames. A neutral flame is generally used when cutting metal, which is characterized by an appropriate ratio of oxygen and gas, and a bright and stable flame. If the flame adjustment is improper, such as excessive oxidation flame, it may cause excessive oxidation of the metal, affecting the cutting quality; If the carbonization flame is too strong, carbon deposits may be left on the cutting surface

Cutting operation: During the cutting process, maintain the appropriate angle (usually vertical) and distance between the cutting gun and the material being cut. Avoid excessive shaking of the cutting gun to avoid affecting cutting accuracy and creating irregular cuts. At the same time, control the cutting speed well. If the speed is too fast, it may result in incomplete cutting, while if the speed is too slow, it may cause the incision to be too wide and there to be too much slag

Shutdown operation: After cutting is completed, the cutting oxygen valve on the cutting gun should be closed first, then the gas valve should be closed, and finally the oxygen valve should be closed. This can prevent the occurrence of tempering phenomenon. Tempering refers to the backflow of flames into the interior of a cutting gun, which may cause an explosion inside the gun, damage equipment, and endanger the safety of operators