GB/T 34357-2017 in English

VALID

Non-destructive testing--Terminology--Terms used in magnetic flux leakage testing

Issued on:2017-09-29
Implemented on:2018-04-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $200.00
$194.00

Standard No:	GB/T 34357-2017
Document status:	VALID
Title in English:	Non-destructive testing--Terminology--Terms used in magnetic flux leakage testing
Title in Chinese:	无损检测术语漏磁检测
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-09-29
Implemented on:	2018-04-01
ICS Classification:	01.040.19-Testing (Vocabularies)
Chinese Classification:	J04-Basic standards and general methods
Professional Classification:	GB-National Standard
Related Keywords:	magnetic flux leakage testing magnetic flux leakage magnetic flux leakage detection magnetic flux leakage signal main magnetic flux testing
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《GB/T 34357-2017无损检测术语漏磁检测》由TC56（全国无损检测标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

Interpretation of GB/T 34357—2017 "Non-destructive Testing Terminology - Magnetic Flux Leakage Testing"

1. Background and significance of standard formulation

GB/T 34357—2017 is an important specification in the field of non-destructive testing, which mainly systematically defines magnetic flux leakage testing methods and related terms. The standard was proposed and coordinated by the National Technical Committee for Standardization of Non-destructive Testing, and the drafting units include many industry-leading testing equipment companies and universities.

As an important non-destructive testing technology, magnetic flux leakage testing has a wide range of applications in metal material defect detection. However, with the advancement of technology and the introduction of new methods (such as DC, AC, pulse magnetic flux leakage testing, etc.), the standardization of terms and definitions is particularly important to ensure uniformity and standardization within the industry.

2. Comparative analysis of standard frameworks

Standard dimensions	Magnetic flux leakage detection methods	Magnetization technology	Magnetic field measurement
Detection types	DC magnetic flux leakage detection (DC MFL), AC magnetic flux leakage detection (AC MFL), pulsed magnetic flux leakage detection (Pulsed MFL), etc.	Technical magnetization, local magnetization, overall magnetization, magnetic flux magnetization, induction magnetization, etc.	Leakage magnetic field measurement, magnetic field component analysis, probe sensitive direction, etc.
Core Terms	Residual MFL, Main Magnetic Flux Testing.	Saturation magnetization, unsaturated magnetization, combined magnetization.	Point magnetic probe, straight (arc) line magnetic probe, zero lift-off probe.
Technical Features	Applicable to different materials and defect types, with high sensitivity and high detection efficiency.	Combined use of multiple magnetization methods improves detection accuracy.	The angle between the probe sensitive direction and the crack direction directly affects the leakage magnetic induction intensity.

3. Implementation Suggestions

Technical Application Suggestions:

In actual testing, the appropriate magnetic flux leakage detection method (such as DC, AC or pulse) should be selected according to the characteristics of the material being tested and the type of defects.
For scenarios with high sensitivity requirements, it is recommended to use combined magnetization technology to improve detection efficiency and accuracy.
In terms of probe selection, the detection scheme should be optimized in combination with the angle between the crack direction and the scanning direction to ensure the maximum capture of the magnetic flux leakage signal.

System Optimization Suggestions:

Regularly calibrate the detection system to ensure the consistency of probe sensitivity and reduce errors caused by equipment aging or environmental factors.
Optimize the scanning overlap rate and spatial filtering technology to reduce the impact of blind spots on the detection results.
The Equi-spaced Interval Sampling (EIS) method is used to improve the uniformity and reliability of signal acquisition.

More samples: JC/T 2453-2018 JGJ 94-2008 YD/T 3934-2021

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