GB/T 17241.1-2024 Cast iron pipe flanges—Part 1:PN designated

GB/T 17241.2-2024 Cast iron pipe flanges—Part 2:Class designated

GB/T 17241.1-1998 Synoptic table for cast iron pipe flanges GB/T 17241.2-1998 Cast iron pipe blank flanges 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 17241.6-2008 Integral cast iron flanges GB/T 17241.7-1998 Specifications for cast iron pipe flanges

GB/T 152.4 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 1048-1990 Nominal pressure for pipe components GB/T 1048-2005 Pipework components—Definition and selection of PN GB/T 1048-2019 Pipework components—Definition and selection of nominal pressure GB/T 1348-1988 Spheroidal graphite iron castings GB/T 1348-2009 Spheroidal graphite iron castings GB/T 1348-2019 Spheroidal graphite iron castings GB/T 6060.1-1997 Roughness comparison specimens—Cast surfaces GB/T 6060.1-2018 Surface roughness comparison specimen—Part 1:Casting surface 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 9439-1988 Grey iron castings GB/T 9439-2010 Grey iron castings GB/T 9439-2023 Grey iron castings GB/T 9440-1988 Malleable iron castings GB/T 9440-2010 Malleable iron castings GB/T 12716-2002 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on the threads GB/T 12716-2011 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads