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General requirements of iso4126 safety valve

iso5208 pressure test of industrial valves

iso5209 marks of general industrial valves

iso5210pt.1 connectors for multi turn valve drives part I: flange size

iso5210pt.2 connectors for multi turn valve drives Part II: connection performance of flanges and joints

iso5210pt.3 connectors for multi turn valve drives Part III Part: size of transmission parts

iso5211pt Part 1 connection of rotary valve driving device part 1: flange size

iso5211pt Part II: connection performance of flange and joint

iso5211pt 3. Connecting parts of multi turn valve driving device

Part 3: size of driving parts

iso5752 structural length of metal valves in flange pipeline system

iso5996 cast iron gate valve iso6002 bolted steel gate valve with bonnet

iso6552 technical language of automatic steam trap

iso6553 mark of automatic steam trap

iso6554 structural length of flange connected automatic steam trap

iso6704 automatic steam trap Classification

iso6948 automatic steam trap manufacturing and service characteristic test

iso7121 flange and butt welded steel ball valve (fourth draft proposal)

iso7259 underground cast iron gate valve mainly operated by handle

iso7841 steam leakage test

standard code ansi

standard name A126 valve, Gray iron castings for flanges and pipe fittings a181 forged or rolled steel flanges and forged pipe fittings valves and parts B16.10 structural tensile testing machine configuration of iron valves the most important is the screw rod and transmission length B16.34 steel valves b127.1 valves for constant level oil

Standard Code ASTM

standard name A230 quality standard of oil tempered carbon spring steel wire for valves a232 quality standard of chrome vanadium alloy steel for valves A350 forged or forged at low temperature Rolled carbon steel alloy steel flanges forged pipe fittings, valves and parts a338 malleable cast iron flanges, pipe fittings and valves a694 carbon steel alloy and alloy steel pipe flanges for high pressure transmission pipe fittings forgings for valves and parts A404 forged or rolled alloy steel pipe flanges for high temperature, forged pipe fittings, valves and parts a522 forged or Rolled 8% and 9% nickel alloy steel flanges and pipe fittings for low temperature, The internationalorganizationforstandardization of valves and parts (ISO for short) is a global non-governmental organization and a very important organization in the field of international standardization. It was founded on February 23rd, 1947. Its predecessor is the International Federation of national standardization associations (ISA) and the United Nations Standards Coordination Committee (UNSCC), and its headquarters are located in Geneva, Switzerland

It communicates through the serial port (COM) behind the computer

first, the organizational structure of ISO. The organizational structure of ISO includes the plenary meeting, principal officials, member groups, communication members, donor members, policy development committee, Council, ISO Central Secretariat, special advisory group, technology administration bureau, standard committee, technical advisory group, technical committee, etc.? ISO technical work is highly decentralized and is undertaken by more than 2700 technical committees (TC), sub technical committees (SC) and working groups (WG). In these committees, representatives of industry, research institutions, government authorities, consumer groups and international organizations around the world work together as peer partners to discuss global standardization issues. A technical committee is mainly managed by an ISO member group (such as AFNOR, ANSI, BSI, CSBTS, DIN, SIS, etc.), which is responsible for daily secretarial work. International organizations, governmental or non-governmental organizations associated with ISO can participate in the work

calibration (Revision) [calibration]

II. The formation process of international standards. International standards are formed by technical committees (TC) and sub technical committees (SC) through six stages: the first stage: the application stage; The second stage: preparatory stage; The third stage: Committee stage; The fourth stage: review stage; The fifth stage: approval stage; The sixth stage: there are also enterprises that stand out. If the documents obtained in the initial stage are mature, some of them can be omitted

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