GB/T 18689-2009 Agricultural irrigation equipment—Manually operated small plastics valves

GB/T 18689-2002 Agricultural irrigation equipment—Manually operated small plastics valves

GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 6031-1998 Rubber,vulcanized or thermoplastic—Determination of hardness (hardness between 10 IRHD and 100IRHD) ISO 7349:1983 ISO 7508:1985 ISO 8233:1988 ISO 8242:1989 ISO 8659:1989 ISO 9393-1:2004 GB/T 3512-2001 Rubber, vulcanized or thermoplastic—Accelerated ageing and heat resistance tests—Air-oven method GB/T 3512-2014 Rubber, vulcanized or thermoplastic—Accelerated ageing and heat resistance tests—Air-oven method GB/T 6111-2003 Thermoplastics pipes for the conveyance of fluids-Resistance to internal pressure—Test method GB/T 6111-2018 Thermoplastics piping systems for the conveyance of fluids—Determination of the resistance to internal pressure GB/T 7306.1-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 1:Parallel internal and taper external threads GB/T 7306.2-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 2:Taper internal and external threads GB/T 7759-1996 Rubber, Vulcanized or thermoplastic—Determination of compression set at ambient elevated or low temperatures GB/T 7759.1-2015 Rubber,vulcanized or thermoplastic—Determination of compression set—Part 1:At ambient or elevated temperatures GB/T 7759.2-2014 Rubber,vulcanized or thermoplastic—Determination of compression set—Part 2:At low temperatures 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 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 20201-2006 Mechanical joint fittings for use with polyethylene pressure pipes for irrigation purposes GB/T 12221-2025 Metal valves—Face to face,end to end,centre to face and centre to end dimensions

ISO 9911:2006