Fillet weld inflation test method

A technology of inflatable test and fillet weld, which is applied in the test field, can solve problems such as berth cycle and latent leakage that are not conducive to the integrity of segmental coating, and achieve the optimization of the tightness test operating environment, reduce energy consumption, and reduce work volume effect

Inactive Publication Date: 2014-03-19
JIANGSU NEW TIMES SHIPBUILDING
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Problems solved by technology

[0005] 1. When the stage cannot be operated, tape protection must be carried out on the tight weld seam produced in the stage, and the operation can only be perform

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  • Fillet weld inflation test method

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Embodiment Construction

[0022] A preferred embodiment will be given below, and the present invention will be described more clearly and completely in conjunction with the accompanying drawings.

[0023] Fillet weld filling test method of the present invention comprises the following steps:

[0024] Step 1: Open the valve, inject compressed air into the root gap of the fillet weld, and when the pointer on the pressure gauge reaches the specified pressure value, close the valve and press static pressure for fifteen minutes; the specified pressure value on the pressure gauge in Step 1 is 0.015Mpa ~0.02Mpa.

[0025] Step 2. Check whether the pointer of the pressure gauge has dropped. If there is a significant drop in the static pressure within 15 minutes, check the leakage of the joint weld and find the cause of the pressure drop; Apply soap liquid on the surface, check whether there is bubble phenomenon on the surface of the weld, and it is considered qualified when there is no bubble in the inspection...

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Abstract

The invention discloses a fillet weld inflation test method which comprises the following steps: step one: opening a valve, injecting compressed air to a fillet weld root gap, and when a pointer of a pressure gage reaches a pressure specified value, closing the valve and calming the pressure for 15 minutes; step two: checking whether the pointer of the pressure gage goes down, if the pointer goes down obviously within the 15 minutes of pressure calming, examining leakage conditions of joint welding seams and finding the reasons for pressure drop, if the pressure does not drop, applying soap liquid to the surface of the fillet weld and checking whether bubbles appear on the surface of the fillet weld, and when test liquid on the fillet weld does not generate bubbles, the fillet weld is deemed to be up to standard; step three: during the testing process, if leakage occurs, marking the leakage place with a chalk; and step four: after testing, small holes in a web must be filled through electrowelding. The method is used for testing whether weld defects, such as air holes, and impurity mixing and the like exist in a continuous welding portion of a watertight region, thereby ensuring no leakage occurring at the watertight region, reducing workload of the slipway tightness test, and reducing in-dock production period.

Description

[0001] technical field [0002] The invention relates to a test method, in particular to a filling test method for fillet welds. [0003] Background technique [0004] For large ships with many welds, large volume, and many cabins, many methods have limitations in use. The air pressure test method is currently the most widely used, simple to operate, convenient and practical, and low in cost. Most shipping companies generally adopt it, but this method has some limitations as follows: [0005] 1. When the stage cannot be operated, tape protection must be carried out on the tight weld seam produced in the stage, and the operation can only be performed when the entire cabin is complete, which is not conducive to the integrity of the stage painting and reduces the berth cycle; [0006] Second, there is a latent leakage. Latent leakage refers to the leakage that is difficult to detect under the usual test methods. Latent leakage refers to the leakage that meets the followin...

Claims

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Application Information

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IPC IPC(8): G01M3/12G01M3/26
Inventor 陆建坤秦峰钱炜陈利民黄炼薛钱柳
Owner JIANGSU NEW TIMES SHIPBUILDING
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