- Main body design standard
ISO 10434
Core positioning: oil and gas industry bolted bonnet steel gate valve technical specifications, equivalent to the API 600 standard content.
Scope of application:
Pressure level: Class 150~2500 (PN 16~420);
Diameter range: DN 15~600 (NPS ½~24);
Applicable media: oil, natural gas, steam and other high-temperature and high-pressure fluids.
Technical requirements:
mandatory full diameter flange end design (a few reduced diameter need special marking);
seat sealing surface need Surfacing welded carbide to enhance wear resistance;
valve body materials need to comply with the ASTM/EN cast and forged steel standards.
ISO 5996
Design and manufacturing requirements for cast iron gate valves for low-pressure water and steam systems.
- The supporting general standards
Structure length
ISO 5752: Specifies the structure length of flanged valves to ensure pipeline compatibility.
Connection end standard
ISO 7005: flange connection size specification (equivalent to EN 1092, ASME B16.5).
Actuators
ISO 5210/5211: Specification of drive interfaces for multi-turn/partial-turn valves (e.g. electric actuators).
- The test and inspection
Seal and strength testing
ISO 5208: General method of pressure testing of industrial valves, covering the strength of the shell, high and low pressure sealing test.
Fire safety
ISO 10497: Valve fire test requirements (equivalent to API 607).
- Typical application scenarios
Oil and gas pipelines: ISO 10434 gate valves are widely used in high-pressure main lines of oil and gas transmission, refining and chemical plants;
Industrial water systems: ISO 5996 cast iron gate valves are suitable for low-pressure water supply and drainage networks;
Drive control scenarios: ISO 5211 standard interface gate valve suitable for automation control systems.
