Does a plastic welding gun produce an open flame?

Plasma welding should be carried out at high-temperature surfaces; a fire safety permit is required for such operations within explosion-proof areas.

To thoroughly clean the pipeline, plastic welding does not produce an open flame but does generate heat.

The plastic welding gun is similar to a soldering iron; we use it here for repairing flanges on glass fiber pipe lines.

There have been incidents where welding torches ignited wastewater containing flammable materials in the workshop sewers; strict controls are applied in accordance with regulations for hot work.

Sometimes sparks are generated at the tip of the welding torch; I’ve seen it with my own eyes. Therefore, the pipes must be clean and clear, and separated from other pipes using blind flanges; a fire permit is required for such work.

Precautions to be observed when using a plastic welding gun: 1. When using a plastic welding gun, it is necessary to apply for a temporary power connection, which must be checked by a professional electrical technician. 2. The plastic welding guns used must be equipped with leakage protectors in accordance with **uniform standards, and users should wear the appropriate personal protective equipment. 3. Before using a plastic welding gun, it must be thoroughly inspected; plastic welding guns with damaged insulation, soft cables or cracked cable sheaths, detached protective ground or neutral wires, cracked plugs, cracked sockets, or any mechanical damage that could affect normal use should not be used. 4. When using a plastic welding gun, it is necessary to clean nearby septic tanks, ditches, leaks, cable trenches, etc., remove combustible materials, and seal them off. 5. During the use of a plastic welding gun, if there is material leakage, oil leakage, or a leak of flammable gases, operations must be stopped immediately. 6. At the site where a plastic welding gun is used, fire extinguishing equipment and tools must be available, and a dedicated person should be assigned to supervise. 7. When using a plastic welding gun in an explosion-proof area, in addition to obtaining a permit for the use of electric tools, a Class 1 hot work permit is also required. When using plastic welding guns in explosion-proof areas, the doors and windows should be opened, surrounding equipment should be covered, flammable items on site should be removed, and the combustible gas concentration in the surrounding area must be checked to ensure it is within acceptable levels before work can proceed. It is not allowed to use substances such as gasoline to clean equipment parts in those areas. 8. When using a plastic welding gun in a confined space, the work area must be thoroughly cleaned and purged to remove all combustible materials; steam cleaning and water washing should be carried out for at least 24 hours. An explosion analysis should be conducted 30 minutes before using the plastic welding gun, and it can only be used once the levels of combustible gases and oxygen are within acceptable limits. Ventilation facilities must be in place during operation, and a dedicated person should be assigned to supervise the work site. 9. Conduct a thorough inspection of the construction site at intervals during work and at the end of the work; clean up the site and cut off the power supply before leaving the work area. As mentioned by the original poster, a plastic welding gun is to be used on a damaged trachea; if it is a pipe carrying toxic gases, such pipes are likely to release toxic gases when exposed to high temperatures ； If it is a gas pipeline, there is a risk of fire and flash explosion; therefore, it is recommended that the person in charge first find out what the pipeline was originally used for, take the appropriate measures, and then proceed with the work!

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