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CECS: 7094 Radiographic Inspection Standard for Metal Fusion Welding in Building Installation Engineering CECS70:94
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CECS : 7094
Standard Name:CECS: 7094 Radiographic Inspection Standard for Metal Fusion Welding in Building Installation Engineering CECS70:94
CECS: 7094 Radiographic Inspection Standard for Metal Fusion Welding in Building Installation Engineering CECS70:94 CECS:7094 Standard download decompression password: www.bzxz.net
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CECS:70: 94 CECS 71 : 94 Standard of China Association for Standardization of Engineering Construction Standard of Radiography for Metal Melting Weld Seamoving Installation Engineering STANDARD OF INSPECTION AND MEASUREMENT OF RAYPHOTOGRAPHING FOR METAL MELTING WELD SEAMOFBUILDING INSTALLATION ENGINEERING CODE OF VISUAL INSPECTION AND ACCEPTANCE FOR SITE WELD OF ENGINEERING CONSTRUCTIONChina Planning Press Standard of China Association for Standardization of Engineering Construction Standard of Radiography for Metal Melting Weld Seamoving Installation Engineering CECS 70 : 94 Welding on construction site Visual inspection specification CECS 71:94 Editor: Structural Welding Committee of China Association for Engineering Construction Standardization Approval unit: China Association for Engineering Construction Standardization Approval date: December 26, 1994 China Planning Press 1995 Beijing China Association for Engineering Construction Standardization Standard Metal fusion welding of building installation engineering Radiographic inspection standard CECS70:94 Welding on construction site Visual inspection specification CECS71:94 China Association for Engineering Construction Standardization Editor-in-chief of Structural Welding Committee (Address: 4th Floor, Building C, Guohong Building, No. 11, Mugundi Beilijia, Xicheng District, Beijing ) (Postal code: 100038 Tel: 6390641363906414) Issued by Beijing Branch of Xinhua Bookstore Printed by World Knowledge Printing Factory 850×1168 mm 1/323.25 sheet 80,000 words First edition in January 1996, second printing in November 2001, print run 10101-16100 copies Unified book number: 1580058·321 Price: 7.00 yuan The two standards "Standard for Radiographic Inspection of Metal Fusion Welds in Building Installation Engineering" and "Specifications for Visual Inspection of Welding at Construction Sites in Engineering Construction" edited by the Structural Welding Committee of the China Association for Engineering Construction Standardization have been reviewed and approved by relevant experts after extensive consultation with relevant units. The "Radiographic Inspection Standard for Metal Fusion Welding Seams in Building Installation Engineering" (CECS70:94) and "Visual Inspection Specification for Welding at Construction Sites" (CECS71:94) are now approved as the standards of the China Association for Engineering Construction Standardization. In the process of implementing these two standards, it is hoped that all units will carefully summarize their experience and pay attention to accumulating data. If any modification or supplement is found, please send your opinions to the Structural Welding Committee of the China Association for Engineering Construction Standardization (Address: Management Cadre College of the Ministry of Chemical Industry, Shijiazhuang City, Hebei Province, Postal Code: 050031). China Association for Standardization of Engineering Construction December 26, 1994 Total Contents Standard for Radiographic Inspection of Metal Fusion Welds in Building Installation Engineering:bzxz.net Standard for Visual Inspection of Welds at Construction Sites of Engineering Construction CECS71:94(75) CECS 70:94 Standard of China Association for Standardization of Engineering Construction Standard for Radiographic Inspection of Metal Fusion Welds in Building Installation Engineering STANDARD OF INSPECTION AND MEASUREMENT OF RAYBUILDING INSTALLATION ENGINEERING China Engineering Construction Standardization Association Standard Metal Fusion Welding Seams in Building Installation Engineering Radiographic Inspection Standard CECS70:94 Editor: China Engineering Construction Standardization Association Structural Welding Committee Approval Unit: China Engineering Construction Standardization Association Approval Date: December 26, 1994 2 General provisions Conditions of radiographic testing units Conditions of radiographic testing staff Working procedures for radiographic testing 2.4 Number of welds to be tested by radiography Location of welds to be tested by local radiography Conditions to be met for welds to be tested by radiography Radiographic process 3, 14 Choice of radiation source energy Radiographic quality grade Classification and selection of films· Intensifying screens Image quality indicators (radiographs) Symbols and codes used in marking Exposure curve Transillumination method Geometric conditions Position and number of image quality indicators·· Placement of positioning marks and identification marks Darkroom cassettes and their placement Shielding of useless rays and scattered rays· Photographic operation Darkroom processing of films and film observation and weld quality grading 4.1 Darkroom processing of films Quality of film (8)||tt| |4.3 Film observation 4.4 Photographic film weld quality assessment 4.5 Steel fusion weld quality classification 4.6 Steel pipe fusion weld butt joint weld quality classification (30) Test report, handling of unqualified and controversial films, spot check of test work..…(36) 5.1 Test report 5.2 Handling of unqualified films 5.3 Handling of controversial films 5.4 Spot check of radiographic test work Construction site radiography Phase protection Appendix A Appendix B Fusion welding butt joint penetration thickness Calculation of effective focus size Appendix C Quality classification of aluminum fusion welding Appendix D Appendix E Quality classification of titanium fusion welding Treatment methods for expanding the assessment area Additional instructions Appendix: Explanation of clauses 1.0.1 This standard applies to radiographic inspection of metal fusion welding seams in building installation engineering and maintenance engineering. 1.0.2 When implementing this standard, the provisions of relevant national standards and professional standards shall also be observed. 1.0.3 When confirming the use of this standard in technical documents or contracts, all provisions of this standard shall be implemented. If only part of the provisions of this standard are adopted in radiographic inspection work, it cannot be regarded as the implementation of this standard. General Provisions 2.1 Conditions for Radiographic Inspection Units 2.1.1 Inspection units shall meet all of the following conditions to be qualified to engage in radiographic inspection of construction and installation projects. 2.1.2 Have X-ray or other radiation sources that can be used at the construction site and fully meet the maximum penetration thickness requirements of the inspected workpieces, film processing darkroom facilities, and film observation facilities. 2.1.3 Have photographers and film assessors engaged in radiographic inspection, of which at least two photographers and one film assessor should obtain the corresponding work qualifications. 2.1.4 Units engaged in radiographic inspection that falsify records and reports shall not engage in radiographic inspection at the construction site before conducting an inspection and formulating improvement measures. 2.2 Conditions for radiographic inspection personnel 2.2.1 Personnel engaged in radiographic inspection shall undergo systematic training before work and must master the relevant technical knowledge of the radiographic inspection work they are engaged in and the basic knowledge of metal melting welding in construction and installation projects. 2.2.2 Radiographic inspection personnel must hold a work qualification certificate corresponding to their work and issued by a national authorized department. Foreign-related projects should obtain the radiographic inspection qualification certification stipulated in the contract. 2.2.3 The vision of film reviewers should be checked once a year, and the corrected vision should not be less than 1.0. It is required that a group of printed letters with a height of 0.5mm and a spacing of 0.5mm can be read at a distance of 400mm. 2.2.4 Radiographic inspection personnel must comply with the provisions of this standard. If any fault is found, 8 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.