A new method of manufacturing oblique tees with large diameter

A production method and technology of inclined tee, which are applied in the field of new large-diameter inclined tee, can solve the problems of difficult control of the temperature of the tee body, high cost, quality defects of large-diameter SA-335P91 inclined tee, etc., and achieve preheating. The effect of easy temperature control, low production cost and reliable quality

Active Publication Date: 2019-10-11
山东海阳丰汇设备技术有限公司
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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 best temperature range required will cause quality defects in the large-diameter SA-335P91 oblique tee.

Method used

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  • A new method of manufacturing oblique tees with large diameter
  • A new method of manufacturing oblique tees with large diameter

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Embodiment Construction

[0039] 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:

[0040] A. Manufacturing and molding of oblique tees

[0041] 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 spliced ​​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 fact that the roots can be penetrated during manual argon tungsten arc welding.

[0042] B. Positioning welding of oblique tee piece 1

[0043] 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 positionin...

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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 optimal temperature range required 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 Patents(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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