GB/T 21873-2008 English PDF

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GB/T 21873-2008: Rubber seals -- Joint rings for water supply, drainage and sewerage pipelines -- Specification for materials
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21873-2008	299	Add to Cart	3 days	Rubber seals -- Joint rings for water supply, drainage and sewerage pipelines -- Specification for materials	Valid

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Basic data

Standard ID: GB/T 21873-2008 (GB/T21873-2008)
Description (Translated English): Rubber seals -- Joint rings for water supply, drainage and sewerage pipelines -- Specification for materials
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G43
Classification of International Standard: 83.140.50; 91.140.60; 91.140.80
Word Count Estimation: 13,171
Date of Issue: 2008-05-14
Date of Implementation: 2008-10-01
Adopted Standard: ISO 4633-2002, MOD
Regulation (derived from): National Standard Approval Announcement 2008 No.8 (Total No.121)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the requirements for the following pipelines vulcanized rubber seal materials: a) cold drinking water (50��C or less) supply pipe, b) drainage, sewage pipes and rainwater pipes (for continuous flow water temperature below 45��C, intermittent flow of water, the working temperature up to 95��C). This standard specifies the various seals identification code is based on the type of seals, purposes and requirements identified (see Table 3).

GB/T 21873-2008: Rubber seals -- Joint rings for water supply, drainage and sewerage pipelines -- Specification for materials

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Rubber seals. Joint rings for water supply, drainage and sewerage pipelines. Specification for materials ICS 83.140.50; 91.140.60; 91.140.80 G43 National Standards of People's Republic of China Rubber seals, drainage and sewage Pipelines Interface seal material specification (ISO 4633.2002, MOD) Posted 2008-05-14 2008-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts the International Standard ISO 4633.2002 "to the rubber seal, seal material drains Interface Specification" (English Chinese Version). This standard is based on ISO 4633.2002 re-drafted. Because of the special needs of our industry, this standard at the time of adoption of international standards has been modified. The technical differences between a single vertical line labeled In terms of knowledge involved in their page margin. And ISO 4633.2002 is a technical difference. --- Compression stress relaxation test method references the reference standard and the international standard ISO 3384.1999 is no correspondence between GB/T 1685-2008; --- References GB/T 2941-2006 is identical with ISO 23529.2004, the original international standard referenced in ISO 4661-1.1993 Has been ISO 23529.2004 is replaced; --- Compression stress relaxation using GB/T 1685-2008, thus deleting the ISO 4633.2002 4.2.7 third in the last Sentence and fifth paragraph is deleted. "If using ISO 3384. Continuous measurement device 5.2 in the first paragraph of 1999 were, So in 7d 100d and performance requirements specified in Table 2 are derived from the measured values \u200b\u200band 7d of the 100d "and" throughout the test period The test temperature should be kept within specified tolerances, and apply the appropriate test equipment continuous "because GB/T 1685-2008 is the use of non-continuous measurement device for continuous measurement of the narrative is not applicable; --- Ozone concentration by the "pphm" to "10-8." For ease of use, this standard also made the following editorial changes. --- Delete foreword international standards; --- "This International Standard" by "this standard." Appendix A of this standard is a normative appendix, Appendix B, Appendix C is informative appendix. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Rubber and rubber products sealing products Standardization Technical Committee Technical Committee (SAC/TC35/SC3) Centralized. This standard is mainly drafted by. Ma On Shan Grace Rubber Products Co., Ltd., Northwest Rubber Plastic Research and Design Institute, Zhejiang quality technology Supervision and Testing Institute, Ya Chang of Industry (Shenzhen) Co., Ltd. Participated in the drafting of this standard. Xingtai Rubber Factory. The main drafters of this standard. Supreme Court training, high Leong, Shen, Chen Weidong, high strength, Caoyuan Li, Shi Cun Zhou, Sun Xingming, Jin Jianguo. Rubber seals, drainage and sewage Pipelines Interface seal material specification

1 Scope

This standard specifies requirements for the following pipeline with a vulcanized rubber gasket material. a) cold drinking water (50 ℃ or less) supply pipe; b) drainage pipes, sewage pipes and rain water pipe (for continuous flow water temperature below 45 ℃; intermittent water flow, operating temperature Up to 95 ℃). This standard specifies the various seals identification code is determined according to seal type, purpose and requirements (see Table 3). The standard of the finished ring also provides general requirements, additional requirements for special purposes should be required to gauge the appropriate product standard set. Attention should be drawn that the seal material properties and performance of pipe joints work, structural geometry and the nipple ring has turn off. Where applicable, with the provisions of this standard shall tubing connection performance product standards used together. This standard applies to include cast iron pipe, steel, ceramic, asbestos cement pipes, cement pipes, reinforced concrete pipes, tubes and glass fiber reinforced plastic Plastic pipes and all pipe joint seals. Elastomer parts of this standard applies to the composite or non-composite rubber seals. For the hardness range of materials in 76IRHD ~ 95IRHD between composite seals, only the rubber seal or directly involved in the long-term stability when using tensile elongation requirements of seals, pressure Compression set and stress relaxation requirements. Interface seal a closed cell material as part of the ring and made within the scope of this standard.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 528-1998 vulcanized rubber or thermoplastic rubber tensile stress strain properties (eqv ISO 37.1994) GB/T 1685-2008 vulcanized rubber or thermoplastic rubber was measured at room temperature and high temperature compression stress relaxation GB/T 1690-1992 Test method for liquid-resistant vulcanized rubber (neq ISO 1817. 1985) GB/T 2941-2006 rubber physical test method for preparing and conditioning General procedures (ISO 23529.2004, IDT) GB/T 3512-2001 vulcanized rubber or thermoplastic rubber hot air and heat accelerated aging test (eqv ISO 188.1998) GB/T 3672.1-2002 Rubber Products tolerance - Part 1. Dimensional tolerances (idt ISO 3302-1.1996) GB/T 5576-1997 rubber and latex nomenclature (idt ISO 1629.1995) GB/T 6031-1998 Determination of vulcanized rubber or thermoplastic rubber hardness (10 ~ 100IRHD) (idt ISO 48.1994) GB/T 7759-1996 vulcanized rubber, thermoplastic rubber at room temperature, high and low temperature compression set determination (Eqv ISO 815.1991) GB/T 7762-2003 vulcanized rubber or thermoplastic rubber resistant to ozone cracking static tensile test (ISO 1431-1. 1989, MOD) GB /9871-2008 Determination of vulcanized rubber or thermoplastic rubber T-aging properties of tensile stress relaxation test (ISO 6914.2004, IDT) GB/T 12832-2008 Rubber crystallization effects by hardness measurements (ISO 3387.1994, IDT) GB/T 17604-1998 rubber pipe joint rings - quality advice and classification of defects (Idt ISO 9691.1992) ......

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