Pull-off force test method

A test method and pull-off force technology, applied in the field of testing, to achieve the effect of no error, simple operation, and true and reliable data

Inactive Publication Date: 2012-05-02
中国石油天然气第七建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no clear pull-off force test method for evaluating the welding process between pipe fittings and tube sheets in the prior art

Method used

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Experimental program
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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the drawings.

[0023] figure 1 It is a schematic diagram of the pull-off force test method in the present invention. In actual construction, the pipe fitting and the tube sheet are made by strength welding and expansion. After the production is completed, the welding process between the pipe fitting and the tube sheet joint must be evaluated to determine whether it meets the design requirements. Including heat exchange tubes, shunt tubes, etc. The pipe fittings in this embodiment adopt heat exchange tubes, and the method includes the following steps:

[0024] The first step is to process the test piece according to the drawing requirements. The test piece is as figure 1 with Figure 4 As shown, the test piece 5 includes a tube sheet 10 and a heat exchange tube 11. The tube sheet 10 is a rectangular parallelepiped. Five through holes are spaced along the length of the tube plate 10, and the heat exch...

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Abstract

The invention relates to a test method, in particular to a pull-off force test method, which mainly comprises the following steps: processing a specimen; processing a plunger, in which the plunger is installed at the top of a pipe piece; processing a pull-off force test fixture; carrying out a pull-off force test; and assessing the welding process according to the tensile strength value. The pull-off force test method has the advantages of simpleness in operation, low cost, convenience in use, safety and reliability, real and reliable test data, and no errors, and is very suitable for the assessment of the welding process.

Description

Technical field [0001] The invention relates to a test method, in particular to a pull-off force test method. Background technique [0002] In the process of welding pipe fittings to the tube sheet, it is sometimes necessary to perform a pull-off force test on the welded test piece to evaluate the welding process. At present, there is no clear pull-off force test method for evaluating the welding process between the pipe fitting and the tube sheet in the prior art. Summary of the invention [0003] The purpose of the present invention is to propose a pull-off force test method, which has simple operation, low cost, convenient use, safety and reliability, true and reliable test data, and basically no errors, and is very suitable for welding process evaluation. [0004] The present invention is realized by adopting the following technical solutions: a pull-off force test method, wherein the method mainly includes the following steps: [0005] (1) Processing test piece: The test piece ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/04
Inventor 单荣伟李梦贤孔凡富崔义新师娟任林昌张立东张龙仿周涛李建江杨琳殷属越刘丽娜王培建
Owner 中国石油天然气第七建设有限公司
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