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Novel manufacturing method of a large-diameter inclined tee joint

A production method and technology of oblique tees, applied in the field of new large-diameter oblique tees, can solve the problems of uneasy control of the temperature of the tee body, high cost, and quality defects of the oblique tees, and achieve easy control of the preheating temperature and production Low cost, reliable quality results

Active Publication Date: 2017-08-04
山东海阳丰汇设备技术有限公司
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AI Technical Summary

Problems solved by technology

[0003] The large-diameter SA-335P91 oblique tee made by forging or drawing process usually has complicated procedures and high cost, and the temperature of the tee body is not easy to control during forging or drawing, which may cause the forging or drawing not to be in its respective position. The optimal temperature range required will cause quality defects in the manufactured large-diameter SA-335P91 oblique tee

Method used

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  • Novel manufacturing method of a large-diameter inclined tee joint
  • Novel manufacturing method of a large-diameter inclined tee joint

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Embodiment Construction

[0044] according to Figure 1 to Figure 2 As shown, a novel large-diameter oblique tee manufacturing method is characterized in that the specific steps are as follows:

[0045] A. Manufacturing and molding of oblique tee fittings

[0046] The three-way inclined branch pipe 1 and the three-way straight mother pipe 2 are cut by mechanical processing, and the pipe fittings are cut, polished and spliced ​​into the required tee shape, and the three-way inclined branch pipe 1 and the three-way straight mother pipe 2. The jointed grooves are processed. The three-way inclined branch pipe 1 and the three-way straight main pipe 2 are made of SA-335P91 material. The processed grooves shall be based on the ability to penetrate the roots during manual argon tungsten arc welding.

[0047] B. Positioning welding of oblique tee fittings 1

[0048] The joint of the three-way inclined branch pipe 1 and the three-way straight main pipe 2 is provided with a positioning block 3, and the position...

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Abstract

The invention discloses a novel manufacturing method of a large-diameter inclined tee joint. The novel manufacturing method comprises the following specific steps of A, manufacturing forming of an inclined tee joint pipe fitting, B, positioning welding of the inclined tee joint pipe fitting, C, preheating of an inclined tee joint fitting tee joint inclined branch pipe and a tee joint straight main pipe, D, joint first layer welding of the inclined tee joint fitting tee joint inclined branch pipe and the tee joint straight main pipe, E, joint bottoming welding of the inclined tee joint fitting tee joint inclined branch pipe and the tee joint straight main pipe, F, joint secondary preheating of the inclined tee joint fitting tee joint inclined branch pipe and the tee joint straight main pipe, G, joint welding of the inclined tee joint fitting tee joint inclined branch pipe and the tee joint straight main pipe, H, inclined tee joint fitting low-temperature protecting, and I, inclined tee joint fitting heat treatment. The novel manufacturing method of the large-diameter inclined tee joint is simple in manufacturing process, low in cost and capable of solving the quality flaw problem probably existing in the large-diameter inclined tee joint.

Description

technical field [0001] The invention relates to the field of manufacturing composite pipes, in particular to a novel method for manufacturing large-diameter oblique tees. Background technique [0002] When the power station is in operation, the high-temperature steam pipeline often has one pipeline divided into two pipelines, which requires a large diameter SA-335P91 oblique tee. The large diameter SA-335P91 oblique tee is usually made by forging or extruding. [0003] The large-diameter SA-335P91 oblique tee made by forging or drawing process usually has complicated procedures and high cost, and the temperature of the tee body is not easy to control during forging or drawing, which may cause the forging or drawing not to be in its respective position. The required optimal temperature range will cause quality defects in the manufactured large-diameter SA-335P91 oblique tee. Contents of the invention [0004] The purpose of the present invention is to solve the above probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 陈雅斌程文俊苗慧霞刘腾
Owner 山东海阳丰汇设备技术有限公司
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