Safety technical measures for the hottest welding

Technical measures for welding safety

1 Welding and cutting 9. Compressed space: within 10m around the cutting point of 0 (3) 000mm, all kinds of combustible and explosive materials must be evacuated. For equipment or engineering structures with combustible materials such as thermal insulation, which are arranged near the operation site, special attention should be paid to taking safety measures to isolate sparks in advance to prevent hidden fires from causing fires

2. Good ventilation shall be ensured during indoor operation. When there are multi-point welding operations or mixed operations of other types of work, protective screens shall be set between each station

3. In oil depots, paint spraying rooms, central acetylene stations and oxygen stations, electric welding is strictly prohibited to extend the shelf life of packaging work

4. When welding pipes, open both ends of the pipe without blocking

5. When electric welding is carried out in the boiler, pipeline, underground, pit and other narrow places, it is necessary to check whether there are combustible gases and other inflammables and explosives inside

6. Regularly check whether the insulation of electric welding machine and welding cable is good, and repair the insulation damage in time

7. The ground wire of electric welding circuit shall not be connected randomly

8. When a container containing liquid fuel must be used, the container must first be carefully brushed and wiped to completely eliminate the residual fuel inside

9. When using various gas cylinders for gas supply and welding, the provisions of the safety regulations, i.e. safety supervision regulations for gas forming cylinders made from plastic molds and plastic machinery, shall be observed

II. Safety rules for calcium carbide

calcium carbide is commonly known as calcium carbide. Preventing fire and explosion accidents in carbide barrels, carbide warehouses and carbide crushing rooms is an important work of welding fire and explosion prevention

1. Reasons for the explosion and fire of calcium carbide

(1) the packaging is not tight, the calcium carbide is damp, and the explosive mixture of acetylene and air is formed in the space in the barrel

(2) calcium carbide in the barrel contains impurity ferrosilicon, which collides with each other during shipping and produces sparks; Or the method of opening the carbide bucket and the use of tools are improper, and sparks are generated by impact during operation

(3) storage "Kearney partner Li Jian said at the meeting that the ground of the calcium carbide site is too low, wet or leaking, splashing, etc., and the calcium carbide is decomposed by moisture

(4) calcium carbide powder accumulated in calcium carbide warehouse, acetylene station and calcium carbide crushing room failed to be cleaned and properly treated in time, which absorbed moisture in the air and decomposed