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XB/T 619-2015Chemical analysis methods of ion type rare earth ore - Determination of total rare earth ion phase (English PDF)

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Issued by

Ministry of Industry and Information Technology of the People's Republic of China

Level / Type

National · Recommended

Issue date

December 20, 2011

Implementation date

July 1, 2012

Scope

XB/T 619-2015 (Chemical analysis methods of ion type rare earth ore - Determination of total rare earth ion phase) is available as an English-translated PDF.

XB/T 619-2015 — This Standard specifies the "test conditions, contrast samples, test items, test methods, and minimum standards for performance indicators that should be achieved for automatic eddy current flaw-detection system of steel tubes (it is generally composed by eddy current flaw detector, detection coil, magnetic saturation device AND mechanical transmission device)" AND content of test report.

This Standard applies to comprehensive performance's test of steel-tube-through-type OR rotating steel pipe/flat coil type automatic eddy current flaw-detection system.

For comprehensive performance's test of steel rod automatic eddy current system, or magnetic flux leakage detection system, AND automatic eddy current flaw-detection system for steel tube and other magnetic flux leakage detection system for steel tube, this Standard can be used for reference during the usage.

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Document preview — XB/T 619-2015

National Standard of the People's Republic of China

ICS: 77.040.20
Classification: H 26

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

Foreword...3
1 Scope...4
2 Normative references...4
3 Terms and definitions...5
4 Test conditions...5
5 Contrast sample...5
6 Test items and methods...6
7 Test report...9

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces YB/T 4083-2000.Compared with YB/T 4083-2000, the main

technical changes are as follows.

- Modified the "the eddy current flaw detector must get assay approval from relevant

department" to be "the eddy current flaw detector shall be calibrated" (see 4.1);

- Added making requirements for the contrast samples of rotating steel pipe/flat coil

eddy current flaw-detection systems (see 5.1);

- Added the test for circumferential sensitivity's difference (fluctuation of

circumferential sensitivity) of rotating steel pipe/flat coil eddy current flaw-detection

system (see 6.2);

- Added the stipulation for test report (see 7).

This Standard was proposed by China Iron and Steel Association.

This Standard shall be under the jurisdiction of the National Technical Committee of

Steel Standardization (SAC/TC183).

Drafting organizations of this Standard. Central Iron & Steel Research Institute,

EDDYSUN (Xiamen) Electronic Co., Ltd. AND China Metallurgical Information and

Standardization Institute.

Main drafters of this Standard. Zhang Jianwei, Fan Hong, Zhang Ke, Lin Junming,

Shen Haihong, Ma Guohua, Zhang Wenjie, Jia Huiming AND Dong Li.

This Standard replaces the previous standards as follows.

- YB/T 4083-1992, YB/T 4083-2000.

Measurement Method of Comprehensive

Properties for Automatic Eddy Current

Flaw Detection System for Steel Tubes

1 Scope

This Standard specifies the "test conditions, contrast samples, test items, test methods,

and minimum standards for performance indicators that should be achieved for

automatic eddy current flaw-detection system of steel tubes (it is generally composed

by eddy current flaw detector, detection coil, magnetic saturation device AND

mechanical transmission device)" AND content of test report.

This Standard applies to comprehensive performance's test of steel-tube-through-type

OR rotating steel pipe/flat coil type automatic eddy current flaw-detection system. For

comprehensive performance's test of steel rod automatic eddy current system, or

magnetic flux leakage detection system, AND automatic eddy current flaw-detection

system for steel tube and other magnetic flux leakage detection system for steel tube,

this Standard can be used for reference during the usage.

2 Normative references

The following documents are essential to the application of this document. For the

dated documents, only the versions with the dates indicated are applicable to this

document; for the undated documents, only the latest version (including all the

amendments) are applicable to this standard.

GB/T 7735 Steel Tubes - The Inspection Method on Eddy Current Test

GB/T 12604.6 Non-destructive Testing - Terminology - Terms Used in Eddy Current

Testing

YB/T 143 Measurement Method of the Error of Signal Amplitude for Eddy Current

Flaw Detectors

YB/T 145 Die Casting and Size Measurement Method of Artificial Defects on the

Reference Sample Pipes

circumferential sensitivity)

6.2.1 Eddy current flaw-detection system for steel-tube-through type coil

Adjust the flaw-detection system to the normal flaw-detection state; according to the

speed of the normal flaw-detection, adjust the sensitivity; use the contrast sample

shown in Figure 1 to make the three artificial holes in the middle part just alarm, and

record the dB value of the gainer or attenuator, at this time; adjust the sensitivity of the

flaw-detection, and record the dB value when the 3 artificial holes begin not to alarm.

The maximum difference between them is the difference of circumferential sensitivity.

The absolute value of this difference shall not be greater than 3dB. For the steel tube

whose outer diameter is greater than or equal to 100mm, this absolute value shall not

be greater than 4dB. Perform the test for 3 times consecutively, and if the results of the

3 times are not the same, the worst value shall be taken.

6.2.2 Eddy current flaw-detection system for rotating flat coil

For the flaw-detection system, whose probe is in rotating type and whose steel tube

can move forward in straight line, use the contrast sample shown in Figure 2 to let the

artificial defects in middle part go through the flaw-detection system repeatedly. Firstly,

set 0° position for the sample at will; adjust the sensitivity of device's each channel;

record gainer's or attenuator's dB value when the artificial defect just alarms. For the

rotating sample, when it is at 120° and 240° position, use the same method to test and

record the dB value when the artificial defect just alarms. The subtraction of the two

dB values which differ by most is the difference of circumferential sensitivity. The

absolute value of this difference shall not be greater than 3dB. For the steel tube whose

outer diameter is greater than or equal to 100mm, this absolute value shall not be

greater than 4dB. Perform the test for 3 times consecutively for each channel, and if

the results of the 3 times are not the same, the worst value shall be taken.

6.2.3 Eddy current flaw-detection system for rotating steel tube

For the flaw-detection system, whose probe is fixed and whose steel tube can move

forward in a spiral, AND for the flaw-detection system, whose probe can move forward

along the axial direction of the steel tube and whose steel tube can spin on the spot,

THEN, use the contrast sample shown in Figure 2 to let the artificial defect in middle

part go through the flaw-detection system repeatedly. Perform the test for three times

consecutively; when the 3 artificial defects in middle part just alarm, record gainer's or

attenuator's dB value; adjust the sensitivity of flaw-detection; when the 3 artificial

defects in middle part just not alarm, record gainer's or attenuator's dB value. The

difference between them is the fluctuation of circumferential sensitivity. The absolute

value of this difference shall not be greater than 3dB. For the steel tube whose outer

diameter is greater than or equal to 100mm, this absolute value shall not be greater

than 4dB. Perform the test for 3 times consecutively, and if the results of the 3 times

are not the same, the worst value shall be taken.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 9 pages — is available in the English PDF.

Referenced standards

Normative references

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