HG 21592-1995 Glass tube liquid level indicator standard series and technical requirements (PN 1.6) (With preparation notes)

ANSI B16.5 GB/T 1220-1992 Stainless steel bars GB/T 1220-2007 Stainless steel bars GB 150-1998 Steel pressure vessels GB/Z 150-2025 Guide for magnetizing behaviour of permanent magnets GB/T 150.1-2011 Pressure vessels—Part 1:General requirements GB/T 150.1-2024 Pressure vessels—Part 1:General requirements GB/T 150.2-2011 Pressure vessels—Part 2:Materials GB/T 150.2-2024 Pressure vessels—Part 2:Materials GB/T 150.3-2011 Pressure vessels—Part 3:Design GB/T 150.3-2024 Pressure vessels—Part 3:Design GB/T 150.4-2011 Pressure vessels—Part 4:Fabrication,inspection and testing,and acceptance GB/T 150.4-2024 Pressure vessels—Part 4:Fabrication,inspection and testing,and acceptance GB/T 1527-1997 Drawn tube of copper and copper alloys GB/T 1527-2006 Drawn tube of copper and copper alloys GB/T 1527-2017 Drawn tube of copper and copper alloys GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB/T 196-2003 General purpose metric screw threads—Basic dimensions GB/T 196-2025 General purpose metric screw threads—Basic dimensions GB/T 197-2003 General purpose metric screw threads—Tolerances GB/T 197-2018 General purpose metric screw threads—Tolerances GB/T 3077-1999 Alloy structure steels GB/T 3077-2015 Alloy structure steels GB/T 308-2002 Rolling bearings—Steel balls GB/T 308.1-2013 Rolling bearings—Balls—Part 1:Steel balls GB/T 308.2-2010 Rolling bearings—Balls—Part 2:Ceramic balls GB/T 3323-1987 Methods for radiographic inspection and classification of radiographs for fusion welded butt joints in steel GB/T 3323-2005 Radiographic examination of fusion welded joints in metallic materials GB/T 3323.1-2019 Non-destructive testing of welds—Radiographic testing—Part 1:X-and gamma-ray techniques with film GB/T 3323.2-2019 Non-destructive testing of welds—Radiographic testing—Part 2:X-and gamma-ray techniques with digital detectors GB/T 3880-1997 Aluminium and aluminium alloy rolled sheet GB/T 3880.1-2006 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 1:Technical conditions of delivery GB/T 3880.1-2012 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 1:Technical conditions of delivery GB/T 3880.1-2023 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 1:Technical conditions of delivery GB/T 3880.2-2006 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 2:Mechanical properties GB/T 3880.2-2012 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 2:Mechanical properties GB/T 3880.2-2024 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 2:Mechanical properties GB/T 3880.3-2006 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 3:Tolerances on forms and dimensions GB/T 3880.3-2012 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 3:Tolerances on forms and dimensions GB/T 3880.3-2024 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering—Part 3:Tolerances on forms and dimensions GB/T 3985-1995 Asbestos-rubber sheets GB/T 3985-2008 Compressed asbestos fibre jointing GB/T 4237-1992 Hot rolled stainless steel sheets and plates GB/T 4237-2007 Hot rolled stainless steel plate, sheet and strip GB/T 4237-2015 Hot rolled stainless steel plate,sheet and strip GB 4457.3 GB/T 5231-2001 Wrought copper and copper alloys chemical composition limits and forms of wrought products GB/T 5231-2012 Designation and chemical composition of wrought copper and copper alloys GB/T 5231-2022 Designation and chemical composition of wrought copper and copper alloys GB/T 6170-2000 Hexagon nuts,style 1 GB/T 6170-2015 Hexagon nuts,style 1 GB/T 65-2000 Slotted cheese head screws GB/T 65-2016 Slotted cheese head screws GB 6654-1996 Steel plates for pressure vessels 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 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 93-1987 Single coil spring lock washers--Normal type GB/T 93-2025 Fasteners—Single coil spring lock washers—Normal type HGJ 223-1992 Technical specification for welding copper and copper alloys HGJ 46 HGJ 47 JB/T 1692-1991 umbrella hand wheel JB 2536 JB 8 JB/T 4709 JC 67 QB 776