GB/T 26334-2023 Fittings for installation of gas meters

GB/T 26334-2010 Fittings for installation of diaphragm gas meters

GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 9124.1-2019 Steel pipe flanges—Part 1:PN designated GB/T 9125.1-2020 Fasteners for steel pipe flange joints—Part 1:PN designated GB/T 10125-2021 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 30789.3-2014 Paints and varnishes—Evaluation of degradation of coatings—Designation of quantity and size of defects,and of intensity of uniform changes in appearance—Part 3:Assessment of degree of rusting HG/T 20606-2009 GB/T 196-2003 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 528-1998 Rubber,vulcanized or thermoplastic—Determination of tensile stress-strain properties GB/T 528-2009 Rubber,vulcanized or thermoplastic—Determination of tensile stress-strain properties GB/T 531.2-2009 Rubber,vulcanized or thermoplastic—Determination of indentation hardness—Part 2:IRHD pocket meter method GB/T 1690-1992 Rubber, vulcanized-Determination of the effect of liquids GB/T 1690-2006 Rubber,vulcanized or thermoplastic—Determination of the effect of liquids GB/T 1690-2010 Rubber,vulcanized or thermoplastic—Determination of the effect of liquids GB/T 1958-2004 Geometrical product Specifications(GPS)—Geometrical tolerance—Verification prescription GB/T 1958-2017 Geometrical Product Specifications(GPS)—Geometrical tolerance—Verification 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 6031-1998 Rubber,vulcanized or thermoplastic—Determination of hardness (hardness between 10 IRHD and 100IRHD) GB/T 6031-2017 Rubber,vulcanized or thermoplastic—Determination of hardness(hardness between 10 IRHD and 100 IRHD) 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 7307-2001 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the 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 7762-2003 Rubber, vulcanized or thermoplastic—Resistance to ozone cracking—Static strain test GB/T 7762-2014 Rubber,vulcanized or thermoplastic—Resistance to ozone cracking—Static strain testing GB/T 196-2025 General purpose metric screw threads—Basic dimensions