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GB/T 33488.3-2017 English PDF

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GB/T 33488.3-2017: Test method of pressure equipment of thermoplastics welded for chemicals -- Part 3: Radiographic examination
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Basic data

Standard ID GB/T 33488.3-2017 (GB/T33488.3-2017)
Description (Translated English) Test method of pressure equipment of thermoplastics welded for chemicals -- Part 3: Radiographic examination
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G94
Classification of International Standard 71.120; 59.100
Word Count Estimation 23,249
Date of Issue 2017-02-28
Date of Implementation 2017-09-01
Quoted Standard GB/T 19348.1; GB/T 19348.2; GB/T 19802; GB/T 23901.1; GB/T 23901.2; GB/T 26837; GB/T 33488.1; GBZ 117; JB/T 6220
Regulation (derived from) National Standard Announcement No. 4 of 2017
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 general requirements for the method of radiographic testing of plastic welding equipment for chemical industry; technical classification; testing preparation; adoption and inspection report. This standard is suitable for the use of polyethylene (PE), polypropylene (PP); polyvinyl chloride (PVC); acrylic eye-butadiene - styrene plastic (ABS) and modified polytetrafluoroethylene (PTFE) and other thermoplastics Pipe or sheet, and the use of hot air welding; extrusion welding; welding and hot melt welding process welding pressure vessel and pressure pipe welding joints of the radiation detection.

GB/T 33488.3-2017: Test method of pressure equipment of thermoplastics welded for chemicals -- Part 3: Radiographic examination


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Test method of pressure equipments of thermoplastics welded for chemicals - Part 3. Radiographic examination ICS 71.120; 59.100 G94 National Standards of People's Republic of China Test method for pressure - bearing equipment for plastic welding of chemical industry Part 3. Ray detection Part 3. Radiographicexamination 2017-02-28 released 2017-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Directory Preface III 1 Scope 1 2 normative reference document 1 3 Terms and definitions 1 4 General requirements 2 4.1 Personnel 2 4.2 Agency 2 4.3 Environmental conditions 2 4.4 Equipment and equipment 3 5 technical classification 3 6 Preparation for testing 3 6.1 Detection arrangement 3 6.2 Surface treatment 6 6.3 Marking 6 6.4 film lap 7 6.5 Image quality (IQI) 7 7 Adoption 7 7.1 Transparent arrangement 7 7.2 Tube voltage selection 8 7.3 Film system selection 9 7.4 Radiation beam adjustment 9 7.5 Measurement of the distance from the radiation source to the inspected position 7.6 Number of passes 9 7.7 film processing 9 7.8 Review requirements 9 7.9 film requirements 9 7.10 Image quality (IQI) sensitivity of the film 10 Quality Classification and Evaluation of Welds 8.1 defect type 10 8.2 Classification of quality levels General rules for quality grading Classification of circular defects Classification of Strike Defects 8.6 Comprehensive rating of defects 12 9 Test Report 12 Appendix A (informative) Image quality (IQI) sensitivity 13 APPENDIX B (informative) DN ≥100mm Method for determining the number of passages of butt welds Appendix C (informative) Radiation detection report format 18 Figure 1 sheet single-wall technology through the layout Figure 3 Figure 2 ring material single-wall technology through the layout Figure 4 Figure 3 Centering radiation source Single-wall circumferential technology Transparent arrangement Figure 4 Figure 4 Double-walled double-walled imaging of the elliptical technique Figure 5 vertical structure of double-walled double-walled imaging Figure 6 vertical technology through the single-walled vertical imaging system through Figure 5 Figure 7 eccentric placement of the radiation source of the single-wall technology through the layout Figure 5 Figure 6 Transverse arrangement of fillet on the same side of the fillet weld Figure 9 Corner welds for the placement of the radiation source on the opposite side of the weld Figure 10 Maximum X-ray tube voltage for permeation thickness (material mass density not less than 0.94 g/cm3) 8 Figure B.1 DN ≥ 100mm pipe docking seam penetration times Figure 16 Table 1 Defect assessment area 10 Table 2 does not count the number of points 10 Table 3 Calculation of round defect points Table 11 Table 4 Classification of circular defects 11 Table 5 Classification of Bar Defects 11 Table A.1 Linear IQI 13 Table A.2 Ladder Hole IQI 13 Table A.3 Linear IQI 14 Table A.4 Ladder Hole IQI 14 Table A.5 Linear IQI 14 Table A.6 Ladder Hole IQI 15 Table C.1 Radiation test report (RTReport) 18 for plastic welding system

Foreword

GB/T 33488 "Chemical plastic welding system with pressure equipment inspection method" is divided into four parts. - Part 1. General; Part 2. Appearance inspection; Part 3. Ray detection; - Part 4. Ultrasonic testing. This part is part 3 of GB/T 33488. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This section is proposed by the China Petroleum and Chemical Industry Association. This part is headed by the National Standardization Technical Committee for Nonmetallic Chemical Equipment (SAC/TC162). This part of the drafting unit. Xinjiang Uygur Autonomous Region Special Equipment Inspection and Research Institute, Changchun City Product Quality Supervision and Inspection Institute, Guangzhou special Pressure Equipment Testing Institute, Harbin Boiler and Pressure Vessel Inspection and Research Institute, Xi'an Plastic Dragon Welding Equipment Co., Ltd., Sichuan Institute of Technology, Wenzhou Fausta Youli Fluid System Co., Ltd., Ningbo Special Equipment Inspection and Research Institute, Jilin Province Rongfa Special Equipment Inspection Co., Ltd., Wenzhou Zhao Fulong Limited. The main drafters of this part. Li Qiang, Tian Bo Yang, Li Maodong, Zhang Jianping, Zhao Feng, Zeng Tao, Xiao Yugang, Chen Hu, Dong Haicheng, Chen Guolong. Test method for pressure - bearing equipment for plastic welding of chemical industry Part 3. Ray detection

1 Scope

This part of GB/T 33488 specifies the general requirements for the method of radiographic testing of plastic welding equipment for chemical industry, technical classification, inspection Preparation, adoption and inspection report. This part is suitable for use with polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene plastic (ABS) and Modified PTFE (PTFE) and other thermoplastic pipe or sheet, and the use of hot air welding, extrusion welding, welding and hot melt welding process welding Of the pressure vessel and the pressure pipe welding joints of the radiation detection.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 19348.1 Non-destructive testing - Industrial radiographic film - Part 1. Classification of industrial radiographic film systems GB/T 19348.2 Non-destructive testing of industrial radiographic films Part 2. Control of film processing using a reference method GB/T 19802 Non - destructive testing - Minimum requirements for industrial radiography GB/T 23901.1 Non-destructive testing - Photographic film backgrounds - Part 1. Determination of the image quality index of linear image quality GB/T 23901.2 Non-destructive testing - Photographic film backgrounds - Part 2. Determination of image quality index GB/T 26837 Non - destructive testing instruments Fixed and mobile industrial X - ray inspection machines GB/T 33488.1 Test methods for pressure welding equipment for plastics used in chemical industry - Part 1. General Standard for Radiation Protection for Industrial X - Ray Inspection JB/T 6220 Non - destructive testing instrument - Density tester for radiographic testing

3 terms and definitions

The following terms and definitions apply to this document. 3.1 Nominal thickness nominalthickness The nominal thickness of the weld metal base of the weld, which does not require manufacturing tolerances. 3.2 Through the thickness of penetratedthickness Radiation beam through the material through the nominal thickness, multi-layer irradiation for the beam through the layers of materials, the sum of the nominal thickness. 3.3 Weld surface to film distance from welding to-filmdistance The distance between the radiating side surface of the subject and the film is measured along the centerline of the beam.

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