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A comparative test block for detecting the non-penetration depth of small-diameter pipe welds

A technology for comparing test blocks and incomplete penetration, which is applied in the direction of using radiation for material analysis, etc., can solve problems such as inability to apply ray detection, and achieve the effect of obvious and intuitive in-depth comparison process and simple and convenient use.

Active Publication Date: 2016-03-23
台州中奥检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the special comparison test block stipulated in the JB / T4730.2-2005 standard and its attached standard appendix H is I A Type and I B The type cannot be applied to the radiographic inspection of the depth range of incomplete penetration defects required by the above regulations and documents.

Method used

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  • A comparative test block for detecting the non-penetration depth of small-diameter pipe welds
  • A comparative test block for detecting the non-penetration depth of small-diameter pipe welds
  • A comparative test block for detecting the non-penetration depth of small-diameter pipe welds

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Embodiment 1

[0028] refer to figure 1 , the first embodiment is a method for detecting the outer diameter D 0 A general-purpose comparison test block for the incomplete penetration depth of small-diameter pipe welds of ≤100mm, this type of comparison test block includes a tubular test block body 1, and the inner wall surface of the test block body 1 is provided with three circumferential artificial defect grooves 3. The position of the outer wall surface of the test block body 1 corresponding to the artificial defect groove 3 is provided with a simulated weld excess height 2, and the width of the simulated weld excess height 2 is not less than the overall width of the three artificial defect grooves 3, that is, the simulated weld excess height 2 is set. The width of the seam height 2 should exceed a sufficient width on both sides of the artificial defect groove 3 to prevent the images from overlapping, and can fully simulate the welding layer structure of the butt joint position of the sma...

Embodiment 2

[0033] refer to image 3, the structure of the second embodiment is basically the same as that of the first embodiment, the difference is that the simulated weld excess height 2 of the comparative test block in the second embodiment is artificially simulated welding on the outer wall surface of the test block body 1 to protrude outwards The annular welding layer from the starting point can fully simulate the welding joint at the butt joint of the small diameter pipe, and the simulation degree is higher.

[0034] The dimensions and specifications of the comparative test blocks in the second embodiment are the same as those in the first embodiment.

Embodiment 3

[0036] refer to Figure 4 , the third embodiment is a method for detecting the outer diameter D 0 A special comparative test block for the incomplete penetration depth of the weld joint of small-diameter ammonia pipelines with a diameter of ≤100mm. This type of comparative test block includes a tubular test block body 1. The inner wall of the test block body 1 is provided with a circumferential artificial Defect groove 3, the position of the outer wall surface of the test block body 1 corresponding to the artificial defect groove 3 is provided with a simulated weld excess height 2, and the width of the simulated weld excess height 2 should exceed the width of the edges on both sides of the artificial defect groove 3. In order to avoid overlapping of images and fully simulate the welding layer structure at the butting position of the small-diameter ammonia pipeline, the height L of the test block body 1 is 80-150 mm, preferably 100 mm. In this embodiment, the residual height 2...

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Abstract

The invention provides a reference block for detecting incomplete penetration depth of a welded junction of a small-caliber tube, and belongs to the technical field of data monitoring. The problems that an existing reference block for detecting the incomplete penetration depth of the welded junction of the small-caliber tube is inconvenient to use, and inaccurate to determine the range of the incomplete penetration depth are solved. The reference block comprises a tubular block body, wherein at least one circular artificial defect slot is formed in the inner wall surface of the block body; a simulated weld joint reinforcement is arranged at a position, corresponding to the artificial defect slot, of the outer wall surface of the block body. The incomplete penetration depth is simulated by providing the artificial defect slot in the inner wall of the reference block, the weld joint of the welded junction is simulated by providing the simulated weld joint reinforcement, the reference block is more accurate, obvious and intuitional in comparison in the detection process, and can be directly put together with a to-be-detected pipeline to compare, and the reference block is more intuitional and faster to evaluate whether the incomplete penetration depth of the welded junction of the small-caliber tube of the to-be-detected pipeline exceeds the standard or not.

Description

technical field [0001] The invention relates to a data detection device, in particular to a comparison test block for detecting the incomplete penetration depth of a welded joint of a small-diameter pipe. Background technique [0002] Pressure pipeline is a kind of special pressure equipment with explosion hazard. It can be used as the core facility of many special equipment or systems, and is responsible for the transportation of high temperature, high pressure, flammable, explosive, highly toxic, strong corrosive or radioactive materials. It occupies an important position in the national economic construction. The integrity of the pressure pipeline is directly related to the safety of production. Once leakage or explosion occurs, it often leads to catastrophic accidents. In order to ensure its safe operation, it is necessary to use appropriate methods to conduct regular inspections on it. There are a large number of defects in the process of manufacturing or using pressu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/18
Inventor 李隆骏洪君华顾荣见郭黎群董灵军毛天林陈云荣王恩林郑渊蔚余旭红
Owner 台州中奥检测科技有限公司