YB/T 4157-2007 High temperature lever shut-off butterfly valve

GB/T 1047-2005 Pipework components—Definition and selection of DN (nominal size) GB/T 1048-2005 Pipework components—Definition and selection of PN GB/T 1184-1996 Geometrical tolerancing—Geometrical tolerance for features without individual tolerance indications GB/T 12221-2005 Metal valves—Face to face,end to end,center to face and center to end dimensions GB/T 13927-1992 Pressure testing for general purpose valves GB/T 13927-2008 Industrial valves—Pressure testing GB/T 13927-2022 Industrial valves—Pressure testing GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB/T 3077-1999 Alloy structure steels GB/T 3077-2015 Alloy structure steels GB/T 5117-1995 Carbon steel covered electrodes GB/T 5117-2012 Covered electrodes for manual metal arc welding of non-alloy and fine grain steels GB/T 5118-1995 Low alloy steel covered electrodes GB/T 5118-2012 Covered electrodes for manual metal arc welding of creep-resisting steels GB/T 699-1999 Quality carbon structural steels GB/T 699-2015 Quality carbon structure steels GB/T 700-1988 Carbon structural steels GB/T 700-2006 Carbon structural steels GB/T 8110-1995 Welding wires for gas shielding arc welding of carbon and low alloy steels GB/T 8110-2008 Welding electrodes and rods for gas shielding arc welding of carbon and low alloy steel GB/T 8110-2020 Wire electrodes and weld deposits for gas shielded metal arc welding of non alloy and fine grain steels GB/T 9119-2000 Slip-on-welding plate steel pipe flanges with flate face or raised face GB/T 9124-2000 Specification for steel pipe flanges GB/T 983-1995 Stainless steel covered electrodes GB/T 983-2012 Covered electrodes for manual metal arc welding of stainless and heat-resisting steels GB/T 984-2001 Hardfacing electrodes for shielded metal arc welding GB/T 985-1988 Basic forms and sizes of weld grooves for gas welding manual arc welding and gas-Shielded arc welding GB/T 985.1-2008 Recommended joint preparation for gas welding,manual metal arc welding,gas-shield arc welding and beam welding GB/T 985.2-2008 Recommended joint preparation for submerged arc welding GB/T 985.3-2008 Recommended joint preparation for gas-shield arc welding on aluminium and its alloys GB/T 985.4-2008 Recommended joint preparation for welding on clad steels YB/T 036.11-1992 Metallurgical equipment manufacturing general technical specification for welded parts YB/T 036.16-1992 Metallurgical equipment manufacturing general technical requirements for heat treatment parts YB/T 036.17-1992 Metallurgical equipment manufacturing general technical requirements for machined parts YB/T 036.21-1992 Metallurgical equipment manufacturing general technical requirements for packaging YB/T 036.3-1992 Metallurgical equipment manufacturing general technical requirements for cast steel parts YB/T 036.17-2025 Metallurgical equipment manufacturing general technical requirements Part 17: Cutting machined parts