Tee product preparation method and prefabricated tee product
A product, the technology of tee, applied in the field of pipeline manufacturing, can solve the problems of difficult butt joint, unequal wall thickness, etc., achieve the effect of satisfying weld offset, improving safety and service life, and facilitating construction site operations
Active Publication Date: 2020-12-11
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology
[0003] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the unequal wall thickness between the tee product and the connecting pipeline in the prior art causes the problem of difficult docking, the present invention provides a preparation method for the tee product on the one hand, the method Include the following steps:
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preparation example Construction
[0040] One aspect of the present invention provides a method for preparing a three-way product comprising the following steps:
[0041] Step S100, preparing a tee product of a predetermined size and a sleeve (connecting pipeline, straight pipe section), the wall thickness of the sleeve is the same as that of the connecting pipeline, and the splicing gaps between the two ends of the tee product and the two sleeves are respectively Conduct the first welding and obtain the first prefabricated sleeve tee product;
[0042] Step S200, performing a second welding on the circumferential weld of the first prefabricated sleeve tee product to obtain a second prefabricated sleeve tee product, the second welding includes external welding filling and covering;
[0043] Step S300, performing a third welding on the circumferential weld to obtain a third prefabricated sleeve tee product, the third welding being internal welding;
[0044] Step S400, detecting the circumferential weld of the th...
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Abstract
The invention belongs to the technical field of pipeline welding, and particularly relates to a tee product preparation method and a prefabricated tee product. The tee product preparation method and the prefabricated tee product aim at solving the problem that in the prior art, due to unequal wall thicknesses, butt joint is difficult. The tee product preparation method comprises the following steps: preparing the tee product and sleeves, splicing the two sleeves with two ends of the tee product correspondingly, and sequentially carrying out root welding, outer welding filling, capping, inner welding cleaning, grinding and capping on circumferential weld joints to obtain the prefabricated tee product with the sleeves; and then carrying out ultrasonic detection, X-ray detection, magnetic powder detection and tempering heat treatment on the circumferential weld joints of the prefabricated tee product with the sleeves, and carrying out pipe end groove machining, size detection, ultrasonicdetection, overall magnetic powder detection, surface rust removal, anti-corrosion marking, packaging and warehousing on the prefabricated tee product with the sleeves. According to the tee product preparation method and the prefabricated tee product, factory prefabrication of circumferential weld joint welding between the tee product and the sleeves is achieved, the construction site operation difficulty is lowered, the pipeline construction safety is improved, and the service life is prolonged.
Description
technical field [0001] The invention belongs to the technical field of pipeline manufacturing, and in particular relates to a method for preparing a tee product and a prefabricated tee product. Background technique [0002] In recent years, high-pressure and large-capacity oil and gas pipelines are the development trend of long-distance pipelines in my country. With the construction of major oil and gas pipeline projects at home and abroad, the market demand for large-diameter and thick-walled three-way pipe fittings continues to increase. In the actual application process, the wall thickness of the tee product is much larger than that of the connected pipeline. There is a problem of unequal wall thickness when the two are connected, which brings great difficulties to the construction site operation and seriously affects the progress of the site operation. Security is also greatly affected. Contents of the invention [0003] In order to solve the above-mentioned problems ...
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IPC IPC(8): B23K9/18B23K9/00B23K9/32
CPCB23K9/18B23K9/00B23K9/32
Inventor 赵志伟白雷杰刘旭安晓军陈小伟高磊臧首婴崔二炜
Owner BC P INC CHINA NAT PETROLEUM CORP