HG/T 3097-2006 Rubber seals - Joint rings for pipelines for hot-water supply up to 110℃ - Specification for the materials
1 Scope
This International Standard specifies requirements for materials used in vulcanized-rubber seals for hot potable and non-potable water supply (up to 110℃).
The different seal designations specified are defined according to seal type, seal application and the requirements for a particular seal (see Table 3).
General requirements for finished joint seals are also given. Any additional requirements called for by the particular application are specified in the relevant product standards, taking into account that the performance of pipe joints is a function of the seal material properties, seal geometry and pipe joint design. This Standard is intended to be used where appropriate with product standards which specify performance requirements for joints.
This Standard is applicable to joint seals for use with all pipeline materials, including iron, steel, clay, fibre cement, concrete, reinforced concrete, plastics and glass-reinforced plastics.
This Standard is applicable to elastomeric components of composite and non-composite seals. In the case of composite seals made from materials with hardnesses ranging from 76 IRHD to 95 IRHD, the requirements for elongation at break, compression set and stress relaxation apply only when the material participates in the sealing function or contributes to the long-term stability of the seal.
Joint rings made from cellular rubber materials or with enclosed voids as part of their design are not covered by this Standard.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 528-1998 Rubber, vulcanized or thermoplastic - Determination of tensile stress-strain properties (eqv ISO 37: 1994)
GB/T 1685-1989 Rubber, vulcanized or thermoplastic - Determination of stress relaxation in compression at ambient and at elevated temperatures (neq ISO 3384:1979)
GB/T 1690-1992 Rubber, vulcanized - Determination of the effect of liquids (neq ISO 1817:1985)
GB/T 2941-1991 Rubber - Standard temperatures, humidities and times for the conditioning environmental and testing of test pieces (eqv ISO 471: 1983)
GB/T 3512-2001 Rubber, vulcanized or thermoplastic - Accelerated ageing and heat resistance tests - Air-oven method (eqv ISO 188:1998)
GB/T 3672.1-2002 Rubber - Tolerances of products - Part 1: Dimensional tolerances (idt ISO 3302-1: 1996)
GB/T 5576-1997 Rubber and latices - Nomenclature (idt ISO 1629: 1995)
GB/T 6031-1998 Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD) (idt ISO 48: 1994)
GB/T 7757-1993 Rubber, vulcanized or thermoplastic - Determination of compression stress-strain properties (eqv ISO 7743:1989)
GB/T 7759-1996 Rubber, Vulcanized or thermoplastic - Determination of compression set at ambient elevated or low temperatures (eqv ISO 815: 1991)
GB/T 7762-2003 Rubber, vulcanized or thermoplastic - Resistance to ozone cracking - Static strain testing (neq ISO 1431-1:1980)
GB/T 9865.1-1996 Rubber, vulcanized or thermoplastic - Preparation of samples and test pieces - Part 1: Physical tests (ISO 4661-1: 1993)
GB/T 12829-1991 Rubber vulcanized - Determination of tear strength of small test pieces (Delft test pieces) (eqv ISO 816: 1983)
GB/T 17604-1998 Rubber - Recommendations for the workmanship of pipe joint rings - Description and classification of imperfections (idt ISO 9691:1992)
ISO 2285：2001 Rubber, vulcanized or thermoplastic - Determination of tension set under constant elongation, and of tension set, elongation and creep under constant tensile load
ISO 6914：2004 Rubber - Recommendations for the workmanship of pipe joint rings - Description and classification of imperfections
3 Classification
Five classes of materials for pipe joint seals are specified in Table 2. A nominal hardness shall be specified within the ranges in Table 1.
Foreword i
1 Scope
2 Normative References
3 Classification
4 Requirements
5 Testing
6 Quality assurance
7 Storage
8 Designation
9 Marking and labelling
Annex (Normative) Determination of splice strength
Annex B (Normative) Determination of compression set in hot water at 110℃ for seals manufactured from isobutylene-isoprene copolymers
Annex C (Informative) Quality assurance
Annex D (Informative) Guidance on storage of seals
Bibliography
