Detail of SY/T 4109-2005

Introduction of SY/T 4109-2005

This standard specifies four non-destructive testing (NDT) methods (including radiographic testing, ultrasonic testing, magnetic particle testing and penetration testing) and their quality grading. Radiographic (X or γ) testing is applicable to the testing and mass grading of the circumferential butt joints of pipelines (made from low carbon steel, low alloy steel and other metal materials with 2mm~50mm wall thickness) for long-distance and collective transport of oil and gas or at the oil and gas stations. Ultrasonic testing is applicable to the testing and mass grading of the circumferential butt joints of pipelines (made from carbon steel, low alloy steel and other metal materials with 2mm~50mm wall thickness and 57mm ~1400mm pipe diameter) for long-distance and collective transport of oil and gas or at the oil and gas stations; it is not applicable to the testing of the butt joints between elbow and straight pipe, hubbed flange and straight pipe as well as return elbow and straight pipe. The magnetic particle testing is applicable to the testing and acceptance of the welding joint surface and near surface imperfection of ferro magnetic pipelines for long-distance and collective transport of oil and gas or at the oil and gas stations as well as of steel storage tanks under normal pressure. The penetration testing is applicable to the testing and acceptance of the welding joint surface opening imperfection of pipelines for long-distance and collective transport of oil and gas or at the oil and gas stations as well as of steel storage tanks under normal pressure. This standard is not applicable to either the NDT of industrial and public pipelines, or the NDT of the fabricating weld joints of oil and gas pipelines.

Contents of SY/T 4109-2005

Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 General Requirements 4.1 Application Principles 4.2 Responsibility of Testing Organization (Department) 4.3 NDT Process Specification 4.4 Testing Personnel 4.5 Duties of Personnel in Charge of NDT 5 Radiographic Testing 6 Radiation Protection 7 Radiographic Testing Personnel 8 Radiographic Testing Equipment, Apparatus and Material 8.1 Selection of Ray Source and Energy 8.2 Film and Intensifying Screen 8.3 Image Quality Indicator (IQI) 8.4 Shield of Useless Ray and Scattered Ray 8.5 Recognition System 8.6 Film Viewing Illuminator and Film Evaluation Room 8.7 Nigrometer and Density Comparison Strip 9 Surface Condition 10 Radiographic Testing Technique 10.1 Radiography Mode 10.2 Geometric Condition 11 Exposure and Exposure Curve 11.1 Exposure 11.2 Exposure Curve 12 Film Processing 13 Negative Film Evaluation 13.1 Evaluation Requirements 13.2 Negative Film Quality 13.3 Evaluation 14 Radiographic Testing Quality Grading 14.1 Quality Grading Criteria 14.2 Imperfection Grading 15 Radiographic Testing Report 16 Ultrasonic Testing 17 Ultrasonic Testing Personnel 18 Flaw Detector, Probe and System Performance 18.1 Flaw Detector 18.2 Probe 18.3 System Performance of Ultrasonic Flaw Detector and Probe 19 Calibration and Recheck 19.1 Calibration 19.2 Recheck of Detector and Probe System 20 Ultrasonic Test Block 21 Preparation Before Testing 21.1 Testing Surface 21.2 Couplant 21.3 Probe Selection 21.4 Fabrication of Distance-Amplitude Curve 22 Testing 23 Quality Grading of Butt Joint 23.1 Quality Grading 23.2 Imperfection Evaluation and Testing Result Grading 24 Ultrasonic Testing Report 25 Magnetic Particle Testing 26 Magnetic Particle Testing Personnel 27 Magnetic Particle Testing Facility, Equipment and Material 27.1 Facility 27.2 Equipment 27.3 Magnetic Particle, Carrier Liquid and Magnetic Suspension 27.4 Calibration 27.5 Safety Protection of Magnetic Particle Testing 28 Site Operation of Magnetic Particle Testing 28.1 Tested Surface Preparation 28.2 Test Timing and Range 28.3 Magnetic Particle Testing Technique 29 Recheck of Magnetic Particle Testing 30 Standards for Acceptance of Magnetic Particle Testing 30.1 Classification and Record of Magnetic Particle Indication 30.2 Evaluation of Related Magnetic Particle Indication 31 Magnetic Particle Testing Report 32 Penetrant Testing 33 Penetration Testing Personnel 34 Testing Materials 35 Penetration Test Block 36 Safety Protection of Penetration Testing 37 Operation on Penetration Testing Site 37.1 Testing Time 37.2 Surface Requirements 37.3 Basic Steps 37.4 Operation Requirements 38 Recheck of Penetration Testing 39 Standard for the Acceptance of Penetration Testing 39.1 Classification of Indication Marks 39.2 Result Evaluation 40 Record and Report of Penetration Testing Appendix A (Informative) Testing Method of Probe Main Parameters Appendix B (Informative) Adjustment of Instrument Scanning Line Appendix C (Normative) DAC Curve Drawing Appendix D (Normative) Application of Reference Block and Testing Sensitivity of Root Imperfection (Incomplete Penetration) Appendix E (Informative) Determination of Loss Difference of Surface Sound Energy Appendix F (Normative) Testing Method under Non-standard Temperature Appendix G (Informative) Report Form