GB/T 27891-2011 Carbon steel press-fittings

GB/T 700-2006 Carbon structural steels GB/T 1682-1994 Rubber, vulcanized—Determination of low-temperature brittleness(single test piece method) GB/T 1804-2000 General tolerances for linear and angular dimensions without individual tolerance indications GB/T 3091-2008 Welded steel pipes for low pressure liquid delivery GB/T 10125-1997 Corrosion tests in artificial atmospheres—Salt spray tests GB/T 13912-2002 Metallic coatings—Hot dip galvanized coatings on fabricated iron and steel articles—Specifications and test methods GB/T 15256-1994 Rubber, vulcanized—Determination of low-temperature brittleness(multiple test piece method) CB/Z 343-2005 GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods 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 531-1999 Rubber—Determination of indentation hardness by means of pocket hardness meters GB/T 531.1-2008 Rubber,vulcanized or thermoplastic—Determination of indentation hardness—Part 1:Duromerer method(Shore hardness) GB/T 531.2-2009 Rubber,vulcanized or thermoplastic—Determination of indentation hardness—Part 2:IRHD pocket meter method GB/T 1685-1982 Rubber, vulcanized—Determination of stress relaxation in compression at normal and at elevated temperature GB/T 1685-2008 Rubber,vulcanized or thermoplastic—Determination of stress relaxation in compression at ambient and at elevated temperatures GB/T 1685.2-2019 Rubber,vulcanized or thermoplastic—Determination of stress relaxation in compression—Part 2:Testing with temperature cycling 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 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 5720-1993 Test methods for rubber O rings GB/T 5720-2008 Test methods for rubber O-rings GB/T 5721-1993 General rules of identification, packaging, transportation and storage for rubber sealing products 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 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 12829-2006 Rubber,vulcanized or thermoplastic—Determination of tear strength of small test pieces (Delft test pieces) GB/T 191-2025 Graphical symbols marking for handling and storage of packages