GB/T 18691.1-2011 Agricultural irrigation equipment—Irrigation valves—Part 1:General requirements

GB/T 18691.2-2011 Agricultural irrigation equipment—Irrigation valves—Part 2:Isolating valves GB/T 18691.3-2011 Agricultural irrigation equipment—Irrigation valves—Part 3:Check valves GB/T 18691.4-2011 Agricultural irrigation equipment—Irrigation valves—Part 4:Air valves GB/T 18691.5-2011 Agricultural irrigation equipment—Irrigation valves—Part 5:Control valves

GB/T 18691.1-2021 Agricultural irrigation equipment—Irrigation valves—Part 1:General requirements

GB/T 18689-2009 Agricultural irrigation equipment—Manually operated small plastics valves GB/T 18691.2-2011 Agricultural irrigation equipment—Irrigation valves—Part 2:Isolating valves GB/T 18691.3-2011 Agricultural irrigation equipment—Irrigation valves—Part 3:Check valves GB/T 18691.4-2011 Agricultural irrigation equipment—Irrigation valves—Part 4:Air valves GB/T 18691.5-2011 Agricultural irrigation equipment—Irrigation valves—Part 5:Control valves ISO 7005-3 GB/T 1047-1995 Nominal size for pipe components GB/T 1047-2005 Pipework components—Definition and selection of DN (nominal size) GB/T 1047-2019 Pipework components—Definition and selection of nominal size GB/T 9114-2000 Hubbed screwed steel pipe flanges with raised face GB/T 9114-2010 Hubbed screwed steel pipe flanges GB/T 10125-1997 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2012 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 10125-2021 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 12220-1989 General purpose industrial valves—Marking GB/T 12220-2015 Industrial valves—Marking GB/T 12221-1989 Metal valves for use in flanged pipe systems—Face-to -face and centre-to-face dimensions GB/T 12221-2005 Metal valves—Face to face,end to end,center to face and center to end dimensions GB/T 17241.1-1998 Synoptic table for cast iron pipe flanges GB/T 17241.1-2024 Cast iron pipe flanges—Part 1:PN designated GB/T 17241.2-1998 Cast iron pipe blank flanges GB/T 17241.2-2024 Cast iron pipe flanges—Part 2:Class designated GB/T 17241.3-1998 Hubbed threaded cast iron pipe flanges GB/T 17241.4-1998 Hubbed slip-on-welding and hubbed socket welding cast iron pipe flanges GB/T 17241.5-1998 Loose hubbed cast iron pipe flanges for lapped pipe end GB/T 17241.6-1998 Integral cast iron pipe flanges GB/T 17241.6-2008 Integral cast iron flanges GB/T 17241.7-1998 Specifications for cast iron pipe flanges GB/T 18252-2000 Plastics piping and ducting systems—Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation GB/T 18252-2008 Plastics piping and ducting systems—Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation GB/T 18252-2020 Plastics piping and ducting systems—Determination of the long-term hydrostatic strength of thermoplastics materials in pipe form by extrapolation GB/T 18688-2002 Agricultural irrigation equipment—Pressure losses in irrigation valves—Test method GB/T 18688-2012 Agricultural irrigation equipment—Pressure losses in irrigation valves—Test methed GB/T 18688-2023 Agricultural irrigation equipment—Pressure losses in irrigation valves—Test method GB/T 21873-2008 Rubber seals—Joint rings for water supply,drainage and sewerage pipelines—Specification for materials GB/T 12221-2025 Metal valves—Face to face,end to end,centre to face and centre to end dimensions GB/T 21873-2025 Rubber seals—Joint rings for water supply,drainage and sewerage pipelines—Specification for materials

ISO 9635-1:2006