Welding process in boiler anti-wear spraying

       Welding quality is the key to the quality of boiler anti-wear spraying project. The following describes the whole process of boiler spray-related pipeline welding in detail.



1. High-voltage welders have all the credentials to work.



High-level welders are the guarantee of welding quality in thermal power engineering. Welders who participate in high-pressure welding must hold a welder certificate issued by the Technical Quality Supervision Bureau and report to the review and supervision for approval. They must pass the exam before they can work.



2. Confession before welding



In order to ensure the safety and quality of the welding process, the supervisor, the owner, and the relevant personnel of the boiler inspection institute are invited to participate in the pre-welding disclosure.



3. Ensure the quality of the welding rod



The temperature and humidity in the electrode warehouse meet the standard requirements:



Before using the electrode, dry the electrode according to the instructions of the electrode manufacturer;



Welding wires are sorted by grade.



4. Preparation of welding technology.



Compile large-diameter pipeline welding operation instructions, report to the supervisor for review, and the owner agrees;

Welding process card, heat treatment process card supporting documents are complete.

5. Preparation before welding



Details, details, details!



After the welding process card is sealed, it is posted near the welding port to facilitate the welder to check the process parameters;



Indicate the engineering, material, specification, welding slogan and welding material of the welding joint; confirm the brand of the welding material again before welding, and pay attention to misuse.



welding consumables;



The electrode barrels are energized and insulated during on-site welding;



Power-on preheating and temperature-controlled welding ports;



Use a qualified infrared thermometer to measure the temperature of the root of the groove. After reaching the preheating temperature specified in the standard, argon arc welding is carried out.



After the welding process card is sealed, it is posted near the welding port to facilitate the welder to check the process parameters;



Mark welding engineering, materials, specifications, welding slogans, and welding materials;



Use a qualified infrared thermometer to measure the temperature of the root of the groove, and then carry out argon arc welding after reaching the preheating temperature specified in the standard.



bottom welding;



Confirm the grade of the welding material again before welding, and beware of misuse of the welding material.



6. Welding



During the welding process, it is necessary to strictly monitor the quality of the welding joint, such as grinding the welding joint, the gap between the joints, the root filling protection, and the temperature control between the layers. Moment! The position and difficulty of the welding junction create various attitudes and splendor of the welder. Although we don't show our faces, we still remember: Seriously, it's how you work.