1. Quality control measures before PE pipe welding
Before PE pipe welding, quality control work needs to be done well, so the work quality can be improved.
First of all, for welding operators, it is necessary to strictly control their quality and skills, and require them to have welding qualification certificates. At the same time, it is necessary to formulate a comprehensive quality management plan, and build a high-quality talent team according to its actual development needs, so as to improve the construction quality. For welding raw materials, it is necessary to meet the relevant national quality requirements.
Secondly, in the process of selecting welding equipment for HDPE pipes, it is necessary to actively apply fully automatic electric welding machines to enable them to have functions such as automatic compensation, automatic heating and pressure, automatic display of welding data information, automatic inspection, automatic detection, and automatic alarm. In order to support the development of welding work.
Thirdly, it is necessary to scientifically select the welding process and evaluate it. At the same time, it is necessary to ensure that the quality of the melt meets the relevant regulations, and quality problems cannot occur. , For the welding process parameters, it is necessary to do a good job of evaluation and control the temperature parameters within 230 ℃, so as to improve the quality of its work. At the same time, it is necessary to comprehensively check the quality of pipes and fittings,
After the quality meets the relevant requirements, prepare the welding joint, do a good job of cleaning, and scrape off the oxide layer.
Quality control measures in PE pipe welding process
In the actual welding work, it is necessary to do a good job in quality management, reduce misoperation and other phenomena, and gradually optimize its working system.
First, the temperature of the welding machine needs to be controlled at about 210°C to facilitate its welding treatment. In addition, in windy or rainy and snowy weather, it is not conducive to carrying out welding work, so as to avoid the phenomenon that the temperature is too low.
Second, construction technicians need to operate in strict accordance with relevant regulations to ensure the accuracy of work data information.
Third, the fixture forming allowance should be controlled above 21mm, and the operating speed and temperature should be scientifically controlled to avoid welding defects.
Fourth, the welding seam needs to be cooled under steady pressure (natural air cooling), and it cannot be moved or added pressure.
Fifth, during the welding work, it is necessary to ensure that the surface of the heating plate is always in a clean state.
3. Quality control measures after PE pipe welding
After the HDPE pipe is welded, the supervisor of Party A or the construction company needs to conduct a complete inspection of the appearance of the welded part, and use the cutting inspection method (notch sampling inspection reaches 5%) to find out the problems existing in the welding work in time and solve them in time. At the same time, technicians need to carry out withstand voltage tests, etc., and combine random inspections with comprehensive inspections. For example, in the random inspection of tensile capacity determination, once quality problems are found, it is necessary to use a comprehensive inspection to determine whether all welding parts exist. question.
