Quality inspection of PE pipe welding is essential
2022-08-14
Whether the storage conditions of the electrofusion pipe fittings before welding meet the standards and whether the cooling process after welding is appropriate are all factors that affect the quality of the final welding. In China, the specification and necessary construction technology in these areas lag behind the development and application of PE pipes, thus restricting the popularization and application of PE pipes to a certain extent. Therefore, professional training for engineering and technical personnel and construction personnel is an effective way to make PE pipeline construction move towards a formal and good development. Inspection can take the following methods:
(1) Check the print record of the welding data of the welding machine for all welding ports.
(2) Appearance quality self-inspection should be carried out 100%. The supervisory acceptance unit shall select a certain proportion of welding joints for visual inspection according to the construction quality, and the number shall not be less than 30% of the number of welding joints, and the number of welding joints for each welder shall not be less than 9. Appearance quality inspection can be carried out according to the following inspection points.
(3) For the welded joints of automatic hot-melt butt joints, the acceptance personnel should select a certain number of welded joints to cut off the curling, and check the quality of the joints according to the above inspection points. The number of random inspections shall not be less than 10%, and the number of random inspections of each welder shall not be less than 5.
(4) Destructive test of the interface should be done for each project. If it is an electrofusion connection, 3% of the welded joints should be extracted, and it is recommended to have no less than 1; And each welder is not less than 3. In the destructive test, the weld can be cut into 4 or more, and the internal fusion is checked. The incomplete fusion is regarded as unqualified, and the tensile test can also be done to see whether the tensile strength meets the requirements.
(5) If the quality of the interface is unqualified, the welder's interface shall be double checked, and if it is found to be unqualified, all the interfaces constructed by the welder shall be reworked.
Through the above acceptance methods, if qualified, the quality reliability of the PE pipe joint can be considered to be similar to that of the steel pipe welding joint.
Our company is professional in producing pipe production lines. If necessary, you can consult relevant content at any time and look forward to our cooperation.
(1) Check the print record of the welding data of the welding machine for all welding ports.
(2) Appearance quality self-inspection should be carried out 100%. The supervisory acceptance unit shall select a certain proportion of welding joints for visual inspection according to the construction quality, and the number shall not be less than 30% of the number of welding joints, and the number of welding joints for each welder shall not be less than 9. Appearance quality inspection can be carried out according to the following inspection points.
(3) For the welded joints of automatic hot-melt butt joints, the acceptance personnel should select a certain number of welded joints to cut off the curling, and check the quality of the joints according to the above inspection points. The number of random inspections shall not be less than 10%, and the number of random inspections of each welder shall not be less than 5.
(4) Destructive test of the interface should be done for each project. If it is an electrofusion connection, 3% of the welded joints should be extracted, and it is recommended to have no less than 1; And each welder is not less than 3. In the destructive test, the weld can be cut into 4 or more, and the internal fusion is checked. The incomplete fusion is regarded as unqualified, and the tensile test can also be done to see whether the tensile strength meets the requirements.
(5) If the quality of the interface is unqualified, the welder's interface shall be double checked, and if it is found to be unqualified, all the interfaces constructed by the welder shall be reworked.
Through the above acceptance methods, if qualified, the quality reliability of the PE pipe joint can be considered to be similar to that of the steel pipe welding joint.
Our company is professional in producing pipe production lines. If necessary, you can consult relevant content at any time and look forward to our cooperation.