1 Scope
This standard specifies requirements and quality classification for testing personnel, testing equipment, technology and testing report with regard to magnetic particle testing and penetration testing.
This standard is applicable to quality testing and assessment of ship steel weld.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document applies.
GB/T 12604.3 Non-destructive Testing - Terminology - Terms Used in Penetrant Testing
GB/T 12604.5 Non-destructive Testing - Terminology - Terms Used in Magnetic Particle Testing
HB/Z 61-1998 Penetrant Testing
JB/T 6064 Non-destructive Testing - Blocks for Penetrant Testing
JB/T 6065 Standard test block for Magnetic Particle Flaw
JB/T 8290 Magnetic Particle Flaw Detectors
JB/T 9213-1999 Non Destructive Testing - Penetrant Testing - A Type Comparator Block
SH/T 0161-1992 Petroleum Products - Determination of Chlorinity
3 Terms
For the purpose of this standard, the terms and definitions established in GB/T 12604.3 and GB/T 12604.5 apply.
4 Testing Personnel
4.1 Personnel engaged in magnetic particle testing & penetration testing shall possess appropriate non-destructive testing technology qualification certificate of ship recognized by the China Classification Society.
4.2 Personnel preparing the technology document (such as technology card and/or technology specification) shall possess corresponding non-destructive testing technology qualification certificate of ship above Grade II.
4.3 Personnel verifying the magnetic particle testing & penetration testing technology document shall possess appropriate Grade III non-destructive testing technology qualification certificate of ship.
4.4 Visual acuity of the testing personnel shall be inspected once a year, his/her corrected visual acuity shall be equal to or better than 1.0, and free from color blindness and color weakness.
5 Testing Equipment
5.1 Metering equipment for the testing must be metrologically calibrated by the organization with legal qualification; the organization shall issue a calibration certificate and guarantee the metering within the validity.
5.2 Magnetic particle flaw detectors shall meet the requirements of JB/T 8290.
5.3 For AC magnetic yoke used in testing by yoke method, the lifting power acting at its maximum magnetic pole spacing shall be greater than 44N; and for DC magnetic yoke, the lifting power shall be greater than 177N.
5.4 Powder blower shall be able to spray vaporous dry magnetic particle and generate adequate compressed air flow, to blow away the magnetic particles on the tested surface that fail to form magnetic particle indication. Flow rate of the air sprayed out by the powder blower shall be adjusted necessarily according to the method specified by the manufacturer.
5.5 Magnetic ink spraying equipment shall be provided with stirrer or have corresponding capacity to make the magnetic ink at a uniform suspension state; and moreover, it can spray the magnetic ink to the tested surface with appropriate pressure.
5.6 Ultraviolet wavelength of black lamp is between 330~390nm, and its central wavelength is 365nm. Irradiance of ultraviolet 380nm to the filter plate surface of the black lamp shall not be less than 1000μW/cm3, and when supply voltage fluctuation of the black lamp is greater than ±10%, pressure stabilizer shall be installed.
5.7 Wavelength of ultraviolet irradiatometer is between 300~400nm, and its central wavelength is 365nm.
5.8 Wavelength of fluorescent brightness meter is between 430~520nm, and its central wavelength is between 500~520nm.
5.9 Ultraviolet irradiatometer, fluorescent brightness meter and illuminometer shall be verified annually by corresponding metering organization.
5.10 Ultraviolet irradiance of black lamp shall be inspected once a week.
5.11 Measuring range of illuminometer shall be greater than 1000lx.
5.12 Magnifier can magnify 2~10 times.
5.13 Verification and repair conditions of equipment shall have written record and it shall well kept as the equipment file.
6 Technology
Foreword I
1 Scope
2 Normative References
3 Terms
4 Testing Personnel
5 Testing Equipment
6 Technology
7 Testing Time
8 Classification of Flaw Indication
9 Quality Classification
10 Flaw Indication Record
11 Testing Report
Appendix A (Normative) Magnetic Particle Testing Technology
A.1 Scope
A.2 Magnetic Particle and Magnetic Ink
A.3 Weld Surface Requirements
A.4 Sensitivity Test Plate
A.5 Magnetization
A.6 Operation Cautions
A.7 Observation of Knock Mark
A.8 Demagnetization
A.9 Technical Documents
Appendix B (Normative) Penetration Testing Technology Method
B.1 Scope
B.2 Flaw Detection Agent
B.3 Standard Test Block
B.4 Technology
B.5 Technical Documents
Appendix C (Normative) Test Method for Penetration Testing Technology at Non-standard Temperature
C.1 General
C.2 Reference Block
C.3 Use of Reference Block
References
