GB/T 28705-2012 English PDF

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GB/T 28705-2012: Non-destructive testing -- Test method for pulsed eddy current testing
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 28705-2012	299	Add to Cart	3 days	Non-destructive testing -- Test method for pulsed eddy current testing	Valid

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Basic data

Standard ID: GB/T 28705-2012 (GB/T28705-2012)
Description (Translated English): Non-destructive testing -- Test method for pulsed eddy current testing
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 19.100
Word Count Estimation: 13,125
Quoted Standard: GB/T 9445; GB/T 11344; GB/T 12604.6; JB/T 4730.3
Regulation (derived from): National Standards Bulletin No. 24 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the cover without removing the case of a large area of wall thinning caused by corrosion detection of pulsed eddy current testing methods. This standard is applicable to the detection of carbon steel, low alloy steel and other ferr

GB/T 28705-2012: Non-destructive testing -- Test method for pulsed eddy current testing

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Non-destructive testing. Test method for pulsed eddy current testing ICS 19.100 J04 National Standards of People's Republic of China Pulsed Eddy Current Non-destructive testing methods Issued on. 2012-09-03 2013-03-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard non-destructive testing by the National Standardization Technical Committee (SAC/TC56) and focal points. This standard was drafted. China Special Equipment Inspection and Research Institute, Huazhong University of Science and Technology, Edson (Xiamen) Electronics Co., Ltd., Jiangxi pot Academy furnace inspection of pressure vessels, Hebei Province, boiler and pressure vessel supervision and Inspection Institute, Nanjing Institute of boiler and pressure vessel testing, manufacturing National Engineering Research Center of Digital Equipment, Shanghai Research Institute of Materials, Anhui Chinese high-tech Development Co., Ltd., Shandong Branch McNair Engineering Unit Limited testing. Drafters of this standard. Shen Tian Gong, Wuxin Jun, Lin Shuqing, Shi Kun, Jimmy Lam, Kang Yihua Huang Chen, Xu Zhiyuan, Zhou Yufeng, Hu Zhi, An Kejian, Wang Lina, Yecheng, Wu accounted stability, Hu Bin, Kehai, Jinyu Fei, Li atlas, Liang Yumei. Pulsed Eddy Current Non-destructive testing methods

1 Scope

This standard sets out without removing the covering layer of the wall thickness due to corrosion thinning large area for detecting pulsed eddy current inspection Measuring method. This standard applies to detect the thickness of carbon steel, low alloy steel and other ferromagnetic material is 3mm ~ 65mm, the thickness of the cover layer 0 ~ 200mm, a temperature of -150 ℃ ~ 500 ℃ in the member, and no less than the diameter of the pipe or tube of 50mm. This standard does not apply to pitting, pits and other local wall thickness caused by thinning and crack detection type defects. This standard does not establish the evaluation criterion, specific criteria by the detection and users of mutual consultation. This standard does not fully given when the safety requirements for testing, the use of this standard to establish appropriate safety obligation of the parties prior to detection And protection guidelines.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 9445 NDT personnel qualification and certification GB/T 11344 NDT contact ultrasonic pulse echo thickness measurement method GB/T 12604.6 Terminology for nondestructive testing Eddy current testing JB/T 4730.3 Non-destructive testing of pressure equipments - Part 3. Ultrasonic testing

3 Terms and Definitions

GB/T 12604.6 defined and the following terms and definitions apply to this document. 3.1 Overlay coating In bonding, adsorption, wrapped, twisted, or other forms of mosaic covering the surface of the subject matter, such as paints, plastics, asphalt, rock wool, foam, Filament wire mesh, cement, carbon (glass) fiber, and other marine life. Cover layer generally consists of coating, insulation and protective layers and other industrial equipment used composition. 3.2 Bending point bendingpoint In double logarithmic coordinates, pulsed eddy current detection signal waveform transition from straight segments to curve segments turning point. 3.3 The characteristic time characteristictime And the time corresponding to the bending point, characterize eddy diffusion from the surface of the subject member to the bottom of the time, and its size is proportional to the magnetic permeability detection element, Conductivity and thickness of the square. 4. Summary The basic principle of pulsed eddy current testing method is shown in Figure 1. Through with a single rectangular pulse or square wave current excitation coil emits a magnetic ......

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