Method for applying phased array technology to periodic inspection rating of pressure pipeline
A technology of pressure pipelines and phased arrays, which is applied to the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, and measuring devices. It can solve problems such as low accuracy and difficulty in measurement. Achieve the effect of flexible sound beam, fast detection speed and reducing the influence of human factors
Pending Publication Date: 2021-02-05
CHINA PETROLEUM & CHEM CORP
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However, it is difficult to measure the height of the defect itself, and the accuracy is not high
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[0026] The method of applying the phased array technology of the present invention in the periodic inspection and rating of pressure pipelines will be described in detail below in conjunction with the embodiments and drawings.
[0027] The method for applying the phased array technology of the present invention in the periodic inspection and rating of pressure pipelines includes the following steps:
[0028] 1) Determine the detection object and make preliminary preparations, including determining the frequency of the probe, the width and spacing of the array elements, the wedge angle, and the scanner according to the specifications, materials, and weld types of the pressure pipeline to be inspected, and carry out inspection of the pressure pipeline. The surface treatment meets the testing requirements; among them,
[0029] When the thickness of the workpiece is 6-15mm, the frequency of the linear array probe is 7.5MHz; when the thickness of the workpiece is 15-70mm, the frequ...
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Abstract
The invention discloses a method for applying a phased array technology to periodic inspection and rating of a pressure pipeline. The method comprises the following steps: determining a detection object, carrying out early-stage preparation, and carrying out surface treatment on the pressure pipeline to meet detection requirements; establishing a focusing rule according to the specification of thedetected pipeline and the welding seam size; calibrating detection parameters of the linear array probe, and making a curve; performing field detection: scanning the pressure pipeline welding joint by using the adjusted phased array detection system; analyzing the scanned image; measuring the length and the height of a defect, and determining the type of the defect; and completing safety condition grade evaluation according to the types, the lengths and the heights of the defects and the corresponding terms of pressure pipeline regular inspection rules and industrial pipelines. The method hasthe advantage of more accurate defect qualitative and quantitative detection, can quickly and accurately perform qualitative and height measurement on the buried defects in the pressure pipeline welding joint, and effectively solves the problem of deviation of pressure pipeline safety condition grade evaluation caused by inaccurate qualitative and quantitative detection.
Description
technical field [0001] The invention relates to a method for periodic inspection and rating of pressure pipelines. In particular, it relates to a method for applying phased array technology in the periodic inspection and rating of pressure pipelines. Background technique [0002] During the manufacture and installation of pressure pipes, welding defects will occur, and new defects will also appear during use, and some defects will expand during use. Defects in welded joints are directly related to the safe use of pressure pipelines. Therefore, "Periodic Inspection Rules for Pressure Pipelines-Industrial Pipelines" TSG_D7005-2018 stipulates that welding defects (undercuts, circular defects, strip defects, incomplete penetration, incomplete fusion) , wrong side) safety status classification method. [0003] Non-destructive testing is the most direct and effective method to find defects in welded joints of pressure pipelines and prevent accidents such as leakage, blasting and...
Claims
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IPC IPC(8): G01N29/06G01N29/30
CPCG01N29/0645G01N29/0654G01N29/30G01N2291/023G01N2291/0289G01N2291/105G01N2291/2675G01N2291/263
Inventor 陈勇刘春辉蒋仕良李涛王强王杜娟郭庆云王乐高丽岩吕驰杨胡荣曹德成
Owner CHINA PETROLEUM & CHEM CORP