The 2013 annual meeting of ISO/TC2 (International Organization for Standardization/Fasteners Technical Committee) was held on October 14-18 in UNM, France (French Mechanical Engineering and Rubber Industry Standardization Association), and the French National Standardization Association AFNOR was the meeting. Host. The ISO/TC2 Fastener Secretariat Mr Brahimi and Mr Fautras hosted a five-day ISO meeting. Nearly 42 representatives from 12 countries including China, Germany, the United States, France, the United Kingdom, Italy, Australia, Japan, Switzerland, Sweden, Canada, and South Korea (listed) participated in the ISO/TC2 Technical Committee and sub-technical committees SC7 and SC12. Conference on Standardization of Fasteners for SC14, TC2 and Working Group WG13.
My delegation consists of five representatives of the head of the National Fastener Standardization Technical Committee (SAC/TC85) Ding Baoping. This is the sixth ISO/TC2 fastener international standardization that China has participated in since its participation in the annual meeting in Paris in 2005, the annual meeting in Sweden in 2007, the annual meeting in Switzerland in 2010, the annual meeting in Japan in 2012, and the annual meeting in Sydney in 2012. Working meeting. The technical committees present at the meeting are full members (P members are voting countries) and observers (O members are those who have a right to speak). China participates in the full-time meeting of the ISO/TC2 Technical Committee this year as a P member.
The ISO fastener standard is the most demanding and widest standard in international trade. In particular, the fastener basic technical standard should be regarded as the general representative standard of the “Metal Fastener Standardâ€. The world's metric and inch countries attach great importance to and strive to obtain a voice and the right to formulate ISO fastener standards, and strive to convert ISO standards or equivalent adoption as their national standards. The United States attached great importance to the fact that a strong delegation led by IFI Executive Chairman Joe Goeenslade attended the annual meeting. China has always attached great importance to the ISO fastener standardization work, pay close attention to and follow the development direction, dynamics and trends of international fastener standardization work. China's fastener standardization work is synchronized with the development of international standards. Practice has proved that the implementation of the adoption of ISO standards is very important and necessary for upgrading the technical level of China's fastener standards and international standards, and is a basic national policy of China.
I. Overview of the ISO/TC2 meeting
   During the five-day meeting, the participating experts carefully listened to and reviewed the ISO/TC2/SC7 “Basic Standards†of ISO/TC2 “Fasteners†technical committees; ISO/TC2/SC11 “Metric Externally Threaded Fastenersâ€; ISO/ TC2/SC12 "Metal Threaded Fasteners"; ISO/TC2/SC14 "Metal Fastener Surface Plating"; ISO/TC2/WG13 "Non-Threaded Fasteners and Pads" documents and draft standards. The criteria for reviewing revisions and reviews during the past year were: ISO/WD 3269, ISO/CD 16288, ISO/WD 6157/1, 6157/2, 6157/3; ISO/CD 1891/2, 1891/3 1891/4, ISO/PWI 4042, ISO/CD 898/3, ISO/PWI 2320; other related standards are also considered: ISO 4759/3, 272, 3508, 4759/3, 4755, 7378, 8991 Standard texts and proposals such as 8992, 2320, and 15065, the meeting was carefully and enthusiastically discussed and reviewed on a case-by-case basis. As a Member State of P, China also reviewed various text clauses, proposals and agendas. The delegation issued opinions and proposed amendments based on China’s experience and experience in fastener standardization work, and conducted a delegation of opinion on the relevant deliberations. Voted and approved by the experts of the participating countries, especially the German Secretary General of the ISO International Fasteners Secretariat. The meeting decided to set up the WG3 Gasket Working Group to develop the draft standard of ISO/WD 898/3 "Carbon Steel and Alloy Steel Fasteners Mechanical Properties Part III Flat Gaskets and Similar Stamping Pads", China as the new working group of seven One of the members of the country will send experts to participate in the work early next year.
From the formulation, voting to issuance of ISO standards is a very serious and lengthy work, going through PWI (pre-stage), NP (proposal stage), WD (preparation stage), CD (committee stage), DIS (reporting) Seven stages, including the draft phase, FDIS (approval phase) and ISO (publishing phase). After completing the work in the CD phase, the International Standardization Technical Committee Secretariat will submit the FDIS review draft to the ISO Central Secretariat for approval. For example, the revised version of the ISO 4042/PWI "fastener fastener plating" standard reviewed this year began in 2004 and is the tenth edition of the manuscript submitted for review.
Second, the main content of this meeting
1. The Secretariat proposes to amend the draft standard of ISO/WD 3269 "Fasteners - Acceptance inspection". The draft standard requirements are used in conjunction with the ISO 16426 "Fastener Quality Assurance" standard, and the AQL qualified quality level (AQL) is proposed. And the concept of limit quality (LQ), cancel the appendix B in the original standard "the basic guidance and interpretation of this standard", in the acceptance inspection of fasteners for the first time, the number of acceptable acceptances is "zero" (C=0) Quality defect requirements, inspection levels refer to ASME B18.18:2011 "fastener quality assurance" and ASTM F1470 "Guidelines for the mechanical properties and functional sampling inspection of fasteners" in the test level A, B and The specification of C, the fastener size and the mechanical properties of the quality specified in the draft remain unchanged, and the draft standard emphasizes and re-proposes the relationship between the inspection lot and the number of samples. Most representatives believed that the provisions in the draft standard would be further revised and discussed. Representatives from France, Australia, China and Sweden proposed changes to the quantitative relationship between the inspection lot and the sample. The author believes that if the newly revised ISO/WD 3269 standard is passed, the implementation of the test acceptance number is “O†concept, and the quality requirements are greatly improved, which may have certain impact on the production and export trade of fasteners in China. China will closely follow the continued development of the international dynamics of the standard.
2. The ISO/TC2/SC7 Fastener Basic Technical Committee presented the discussion paper of ISO/CD 16228 "Fasteners-Inspection documents fastener certification document format", which is in EN 10204:2005 "Metal Product Inspection Certificate Format" On the basis of the standard, the quality certificate certificate for fasteners such as bolts, screws, studs, nuts, washers, pins, rivets, etc. is divided into: F2.1 - fastener conformity declaration (namely certificate), F2. 2——The quality of the fastener conforms to the inspection certificate of the manufacturing quality (certificate for non-specific delivery batch), F3.1—the inspection report certificate for the supply of the supplier (equivalent to 3.1B of EN 10204) Certificate mode) and F3.2 and F3.3 - Certificates of inspection report issued by a third party for the provided batch. It is also clear that ISO 16228's quality certificate is to be used in conjunction with ISO 3269 and ISO 16426. The requirements for delivery fasteners include: material, mechanical and physical properties, surface coating and dimensions and threading requirements.
Four types of certification templates are provided in the draft standard “Appendix Aâ€: F2.1 – ISO 4032 Nut Compliance Certificate; F2.2 – ISO 7089 Flat Gasket Certificate; F3.1 – ISO 4014 Bolt Certificate of ISO 898-1 mechanical performance requirements, ISO 15977 hollow core rivet inspection certificate template. After discussion by the participants and deliberation by the participating experts, it was agreed to set up an expert working group to further improve, refine and abbreviate the standard texts, and form a DIS review draft for review.
3. The meeting discussed ISO/WD 898/3 "Mechanical properties of fasteners made of carbon steel, alloy steel and stainless steel — Part 3: Washers, and similar punched fasteners at the WG3 Working Group meeting in Milan, Italy, March 2013. With specified property classes, the mechanical properties of carbon steel and alloy steel fasteners, the third part of the flat pad and similar stamping pad, the draft standard is a series of standards for the mechanical properties of ISO 898 fasteners. It refers to the DIN and ASTM standards for the first time to propose the performance relationship between the gasket and the bolt, the mechanical performance parameters, and the technology for testing the chemical composition, hardness and mechanical properties of the gaskets such as flat gaskets, springs, discs, internal and external serrations. Parameter requirements and methods, after discussion, the stainless steel gaskets in the original manuscript were removed to ISO 3506. The French representative also proposed a clock law rating mark for the gasket according to the method of ISO 898/1. First draft. The meeting decided to set up seven national WG3 gasket working groups. China Hangzhou Spring Washer Co., Ltd. will participate in the working group meeting in Milan in early 2014 as a representative of China, and further modify the draft standard to submit the next annual meeting to improve the ISO 898 fastening. A series of standards for mechanical properties.
4. The meeting discussed ISO/WD 1891 three fastener terminology series standards: ISO/WD 1891/2 "Fasteners — Terminology — Part 2: Vocabulary and definitions for coatings terminology for fastener plating", ISO/WD 1891/ 3 "Fasteners — Terminology — Part 3: Mechanical properties and testing fastener mechanical terminology", ISO 1891/WD /4 "terminology for controls, inspection, delivery, acceptance and quality of fasteners. Fastener production process control, Standard texts for the terminology of inspection, delivery, acceptance inspection and quality, and agree to transfer to the DIS for review as soon as possible. It is required to add Chinese, Italian, Japanese, Spanish and Swedish languages ​​to the existing standard nouns in English, French, German and Russian. This will be the first time that Chinese characters have appeared in the international fastener standards.
5. The meeting was hosted by Mrs Fautras and Mr Brahimi on the fourth day of the meeting. The participants spent more time discussing ISO/TC2/SC14 technical committee members' ISO/PWI 4042 (10th draft) "Fasteners — Electroplated The revision of coatings for fasteners, the new terminology and related codes for coating thickness and coating, the first new and clear specification of the torque of the post-plating thread inspection on the thread gauge, for galvanizing fastening The importance of the anti-hydrogen embrittlement (EHE) and the requirements of the dehydrogenation treatment, review "the minimum corrosion resistance time parameter of the plating layer (data of neutral salt spray test - white corrosion, red rust)", newly proposed The technical requirements for post-plating purification, surface sealing, topcoat and post-plating lubrication are proposed by France and the United States and are recommended in accordance with the parameters of the gap between the thickness of the coating and the thread in ASTM F1941. The standard has certain changes and differences from the technical content and terms of the existing ISO 4042:1999 version. In "Appendix B", the mechanism of hydrogen embrittlement (EHE) and the technical measures against hydrogen embrittlement after fastener surface treatment were analyzed in detail. The meeting also listened to Korean technical experts on fasteners. The test uses the introduction of the mechanical quick test method.
At the same time, the meeting also considered it necessary to reconfirm the ISO 10684 "fastener hot-dip galvanizing" standard.
6. According to the annual meeting ISO/TC2, there are a large number of fastener products and basic standards that need to be reviewed. ISO/TC2 also notified the ISO revision number, the newly issued fastener standard name and quantity, and the next work progress time. table. In a few days of meetings, the Chinese delegation representative Ding Baoping on behalf of China fully expressed China's opinions and positions, and played a role in international standardization activities, which substantially enhanced China's position in international fastener standardization. The meeting finally passed all the resolutions of this year's meeting and it was a complete success. The meeting also decided that the next annual meeting of ISO/TC2 will be held in October 2014 in Milan, Italy.
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