Three-way product preparation method and prefabricated three-way product
A product, the tee technology, applied in the field of pipeline manufacturing, can solve problems such as difficult butt joints, unequal wall thickness, etc., achieve the effect of satisfying the offset of the weld seam, improving safety and service life, and facilitating construction site operations
Active Publication Date: 2022-04-12
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 preset 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 gap between the two ends of the tee product and the two sleeves 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 third prefabricated sleeve ...
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Abstract
The invention belongs to the technical field of pipeline welding, and specifically relates to a preparation method of a tee product and a prefabricated tee product, aiming to solve the problem of difficult butt joints caused by unequal wall thickness in the prior art. The preparation method of the tee product provided by the invention, It includes the following steps: preparing the tee product and the sleeve tube, splicing the two sleeve tubes with the two ends of the tee product respectively, and sequentially performing root welding, external welding filling, covering, internal welding cleaning, and grinding on the circumferential weld seam , cover surface to obtain prefabricated sleeve tee products, and then conduct ultrasonic testing, X-ray testing, magnetic particle testing, and tempering heat treatment on the circumferential welds of prefabricated sleeve tee products, and perform pipe end bevel processing on prefabricated sleeve tee products. Dimensional testing, ultrasonic testing, overall magnetic particle testing, surface derusting, anti-corrosion marking, packaging and storage. The invention realizes the factory prefabrication of the circumferential weld seam welding between the tee product and the sleeve pipe, reduces the difficulty of operation on the construction site, and improves the safety and service life of pipeline construction.
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 ...
Claims
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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