GB/T 21874-2008 (English Version) PDF

Standard No.: GB/T 21874-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 21874-2008

Scope: This standard specifies the general requirements for finished seal rings. Additional requirements required for a particular application shall be specified in the corresponding product standard. It should be noted that the working performance of the pipe joint is related to the performance of the sealing ring material, the geometry of the sealing ring and the structure of the pipe joint. This standard is applicable to thermoplastic elastomer sealing ring materials for the following pipelines: a) sewage pipes used in buildings (for intermittent flowing water, the working temperature can reach 95 ℃); b) buried drainage pipes and sewage pipes (for continuous For flowing water, the operating temperature is below 45°C; for intermittent flowing water, the operating temperature can reach 95°C); c) Rainwater pipes.

GB/T 21874-2008 Referenced Document

GB/T 1685-2008 Rubber,vulcanized or thermoplastic.Determination of stress relaxation in compression at ambient and at elevated temperatures*， 2008-05-15 Update
GB/T 1690-1992 Rubber, vulcanized-Determination of the effect of liquids
GB/T 17604-1998 Rubber--Recommendations for the workmanship of pipe joint rings--Description and classification of imperfections
GB/T 2941-2006 Rubber. General procedures for preparing and conditioning test pieces for physical test methods
GB/T 3512-2001 Rubber,vulcanized or thermoplastic--Accelerated ageing and heat resistance tests-Air-oven method
GB/T 3672.1-2002 Rubber-Tolerances of products--Part 1: Dimensional tolerances
GB/T 528-1998 Rubber, vulcanized or thermoplastic--Determination of tensile stress-strain properties
GB/T 6031-1998 Rubber, Vulcanized or thermoplastic--Determination of hardness (hardness between 10 IRHD and 100IRHD)
GB/T 7759-1996 Rubber, Vulcanized or thermoplastic--Determination of compression set at ambient elevated or low temperatures
GB/T 7762-2003 Rubber,vulcanized or thermoplastic--Resistance to ozone cracking--Static strain test

2008 GB/T 21874-2008 Elastomeric seals.Requirements for materials for pipe joint seals used in water and drainage applications.Thermoplastic elastomers