GB/T 25757-2010 English PDF

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GB/T 25757-2010: Non-destructive testing -- Test methods of performance characteristics of automatic magnetic flux leakage testing systems for steel tubes
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25757-2010	169	Add to Cart	3 days	Non-destructive testing -- Test methods of performance characteristics of automatic magnetic flux leakage testing systems for steel tubes	Valid

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Basic data

Standard ID: GB/T 25757-2010 (GB/T25757-2010)
Description (Translated English): Non-destructive testing -- Test methods of performance characteristics of automatic magnetic flux leakage testing systems for steel tubes
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 19.100
Word Count Estimation: 7,744
Date of Issue: 2010-12-23
Date of Implementation: 2011-10-01
Quoted Standard: GB/T 12606
Regulation (derived from): National Standard Approval Announcement 2010 No.10 (Total No.165)
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 test content and test methods for seamless and welded steel pipe ferromagnetic (except submerged arc welded) automatic magnetic flux leakage detection systems overall performance. This standard applies to the use of comparative samples specified in this standard in the detection field conditions to test the overall performance of magnetic steel automatic leak detection system. This standard also applies to the end, or with thick steel pipe couplings, automated magnetic flux leakage detection system with comprehensive performance testing of oil pipes. Ferromagnetic flux leakage detection system automatically bars comprehensive performance testing can refer to this standard.

GB/T 25757-2010: Non-destructive testing -- Test methods of performance characteristics of automatic magnetic flux leakage testing systems for steel tubes

---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 methods of performance characteristics of automatic magnetic flux leakage testing systems for steel tubes ICS 19.100 J04 National Standards of People's Republic of China Non-destructive testing of steel tubes automatic magnetic flux leakage detection system Comprehensive Performance Test Method Issued on. 2010-12-23 2011-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

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, Hefei Simmel Detection Equipment Co., Ltd., Hefei University of Technology, Division of Haitai Detection Technology Co., Ltd. Hefei big test. The main drafters of this standard. HE Fu Yun, Ding Keqin, Chen Bin, Lin Shuqing, where arrows. Non-destructive testing of steel tubes automatic magnetic flux leakage detection system Comprehensive Performance Test Method

1 Scope

This standard specifies the test content ferromagnetism of seamless and welded steel pipe (except submerged arc welded) Automatic magnetic flux leakage testing of system performance And test methods. This standard applies to the use of the comparative samples specified in this standard under field conditions to test the detection of magnetic flux leakage pipe automatic detection system Fully Sealing properties. This standard also applies to thick ends or with steel pipe couplings, oil leakage magnetic detection system with automatic comprehensive performance test tube. Ferromagnetic steel bar automatic magnetic flux leakage testing system performance tests also can refer to this standard.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 12606 pipe magnetic flux leakage inspection method (GB/T 12606-1999, eqv ISO 9402. 1989, ISO 9598. 1989)

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Pipe automatic magnetic flux leakage detection system automaticmagneticfluxleakagetestingsystemsforsteeltubes MFL detection means after the ferromagnetic material is magnetized, inner and outer surfaces due to material defects or internal leakage magnetic field and the formation of defects on the surface, through Excessive leakage field to detect defects discovered a method for non-destructive testing of defects. Pipe automatic magnetic flux leakage detection system is divided in the circumferential direction (transverse) detector or axial (longitudinal) detecting means commonly used to two kinds of axial and circumferential Combining means in order to achieve the test results more comprehensive and accurate aim. 3.2 Degaussing demagnetize Ferromagnetic steel tubes in magnetic flux leakage detection system automatically by an axial magnetic field magnetization, the presence of residual magnetic field in the tube after leaving the detection system, Residual magnetic field pipe to eliminate the operation of said degaussing. Pipe automatic transverse magnetic flux leakage detection system is usually configured with degaussing device.

4 Test Conditions

4.1 pairs of test line requirements Since entering the pipe until it is fully automatic by magnetic flux leakage inspection system during its axis should be in a straight line. 4.2 Working speed detection system The test tube automated magnetic flux leakage detection system should be at normal operating speed, the operating speed of change can not exceed 10% test To record keeping magnetizing current, speed detection, signal gain, suspicious waste electrical signals and alarms sentenced equality argument. 4.3 Other test conditions Other test conditions shall comply with GB/T 12606 of. ......

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