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What are iso standard pipe fittings

      ISO is an international standards organization whose members come from more than 100 countries in the world of national standards bodies, representing China in the ISO national body, the China Bureau of Technical Supervision (CSBTS). ISO and the International Electrotechnical Commission (IEC) are closely linked, China's participation in the national institutions are also IEC Bureau of Technical Supervision. ISO and IEC as a whole responsible for the development of a global consensus on the mandate of the international standards, ISO and IEC are non-governmental organizations which have developed the standard is essentially voluntary, which means that these standards must be a good standard, they are industry and services would bring benefits, so they consciously use these standards. ISO and the IEC is not a United Nations agencies, but they and the United Nations specialized agencies of the many technical liaison relationships. ISO and IEC, about 1,000 professional and technical committees and subcommittees , Member States to states to participate in these technical committees and sub-committee's activities.Standards cover a wide range, from the base of the fastener, bearing a variety of raw materials to semi-finished and finished products, its technical fields related to information technology, transportation, agriculture, health and the environment. Each working body has its own work plan, the Plan sets out the need for standard items (test method, terminology, specifications, performance requirements, etc.). ISO's main function is for people to reach a consensus on the development of international standards to provide a mechanism. The main institutions and operating rules are in a book entitled ISO / IEC technical work documents Guidelines may be prescribed, its technical structure of ISO has 800 technical committees and sub-committees, each of which has a chairman and a secretariat, the Secretary Department is served by the respective member states, at present the Secretary of State commitment to the work of members of the groups 30, the Secretariat and the ISO Central Secretariat based in Geneva, to maintain direct contact.
Through these working bodies, ISO has issued a 9200 international standards, such as the ISO metric thread, ISO A4-paper size, ISO containers series (95% of the world's shipping containers are in line with ISO standards), ISO film speed code, ISO's Open Systems Interconnect (OS2) Series (widely used in the information technology field), and the famous ISO9000 quality management standards. In addition, ISO with 450 international and regional organizations have liaison relationships in a standard, in particular with the International Telecommunication Union (ITU) have close contact. In the ISO / IEC international standards bodies outside the system a total of 28. Each agency to formulate in a particular area of international standards, usually they are under United Nations control. A typical example is the World Health Organization (WHO) .ISO / IEC developed 85% of the international standards, the remaining 15% from the 28 other international standards bodies to develop.
ISO through its 2856 technical institutions to carry out technical activities. One Technical Committee (TC) a total of 185, sub-technical Commission (SC) a total of 611, the Working Group (WG) 2022 in the Special Working Group 38. ISO technical body of the 2856 results of technical activities (products) is the "international standards." ISO has been to develop international standards for a total of more than 10.3 thousand, mainly related to all walks of life a variety of products (including services and products, knowledge products, etc.) specifications. ISO international standards drawn up in addition to the name of the specification, there are number, number format is: ISO + Standard No. + [bar + in standard No.] + colon + release era name (in square brackets in the contents of the optional ), such as: ISO8402: 1987, ISO9000-1: 1994 and so on, respectively, to a certain standard number. However, "ISO9000" do not mean a standard, but a family of standards collectively. According to ISO9000-1: 1994 definition: " 'ISO9000 family' is developed by the ISO/TC176 all international standards." What does TC176? TC176 that is the first ISO Technical Committee 176, which was established in 1980, stands for "quality assurance technical committee", in 1987 again changed its name to "Quality management and quality assurance technical committee." TC176 is responsible for developing technology, quality management and quality assurance standards. TC176 first country to introduce a standard is ISO8402: 1986, entitled "Quality - The term" on June 15, 1986 released. In March 1987, ISO has officially released the ISO9000: 1987, ISO9001: 1987, ISO9002: 1987, ISO9003: 1987, ISO9004: 1987 a total of five international standards, with the ISO8402: 1986, together referred to as "ISO9000 series of standards." Since then, TC176 again in 1990 published a standard, issued in 1991, three standards, issued in 1992, a standard issued in 1993, five criteria; in 1994 no other dissemination standards, but the
On the aforementioned "ISO9000 series standard" unified amended, respectively, replaced by ISO8402: 1994, ISO9000-1: 1994, ISO9001: 1994, ISO9002: 1994, ISO9003: 1994, ISO9004-1: 1994, and to develop a standard definition of TC176 for the "ISO9000 family." In 1995, TC176 has issued a standard number is ISO10013: 1995. So far, ISO9000 family a total of 17 criteria, see Appendix A.
For the above criteria, as an expert should be familiar with, as a business, simply choose one of the following three criteria:
1.ISO9001: 1994 "quality system design, development, production, installation and service quality assurance model";
2.ISO9002: 1994 "quality system of production, installation and service quality assurance model";
3.ISO9003: 1994 "quality system final inspection and testing of the quality assurance model."