GB/T 37842-2019 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 37842-2019 | English | 320 |
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Ball valves of thermoplastics materials
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GB/T 37842-2019: Ball valves of thermoplastics materials---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT37842-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.140.30
G 33
Ball valves of thermoplastics materials
(ISO 16135.2006, Industrial valves - Ball valves of thermoplastics materials,
MOD)
Issued on. AUGUST 30, 2019
Implemented on. MARCH 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative references... 6
3 Terms, definitions and symbols... 7
4 Materials... 12
5 Design... 13
6 Requirements... 16
7 Test method... 20
8 Inspection rules... 21
9 Marking, packaging, transportation and storage... 23
Appendix A (Informative) Type selection of multi-way ball valve... 25
Appendix B (Informative) Comparison between nominal outer diameter dn and
nominal diameter DN... 30
Appendix C (Informative) Purchasing Information... 31
References... 33
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard uses the redrafting method to modify and adopt ISO 16135.2006
"Industrial valves - Ball valves of thermoplastics materials".
Compared with ISO 16135.2006, this standard has the following structural
changes.
- In Terms and definitions, ADD "Symbols" (see 3.4);
- DIVIDE Chapter 4 "Requirements" of ISO 16135.2006 into "Materials",
"Design", "Requirements" of this standard (see Chapter 4 ~ Chapter 6);
- DELETE the content of 4.7.2 and 4.8 in ISO 16135.2006;
- DIVIDE Chapter 5 "Inspection procedure" of ISO 16135.2006 into "Test
method" and "Inspection rules" (see Chapter 7 and Chapter 8);
- DELETE Chapter 6 of ISO 16135.2006;
- COMBINE Chapter 7 "Marking" and Chapter 8 "Transport and storage" of
ISO 16135.2006 into "Marking, packaging, transport and storage" (see
Chapter 9);
- ADJUST Appendix B of ISO 16135.2006 to Appendix A (see Appendix A);
- ADD the comparison between the nominal outer diameter dn and the
nominal diameter DN (see Appendix B);
- ADJUST Appendix A of ISO 16135.2006 to Appendix C (see Appendix C).
Compared with ISO 16135.2006, the main technical differences of this standard
and the reasons are as follows;
- DELETE the pressure class (see Chapter 1); ADOPT metric units uniformly;
- Regarding normative references, this standard has adjusted the specific
technical differences, to adapt to China's technical conditions. The
adjustments are collectively reflected in Chapter 2 "Normative references";
the specific adjustments are as follows.
• USE GB/T 7306.1-2000 and GB/T 7306.2-2000 which equivalently adopt
international standards to replace ISO7-1.1994 (see 6.3.1.3);
• USE GB/T 12223-2005 which modifies and adopts international standard
to replace ISO 5211.2001 (see 5.3.2);
• USE GB/T GB/T 27726-2011 which modifies and adopts international
standard to replace ISO 9393-2.2005 (see 6.4);
• USE Appendix A of GB/T 28494-2012 which modifies and adopts
international standard to replace EN 12570.2000 (see 5.4.2);
• USE Appendix B of GB/T 28494-2012 which modifies and adopts
international standard to replace ISO 8233-1998 (see 7.8);
• USE Appendix C of GB/T 28494-2012 which modifies and adopts
international standard to replace ISO 8659.1999 (see 7.9);
• DELETE the ISO 228-1.2000, ISO 898-1.1999, ISO/TR 10358.1993, ISO
12092.2000, ISO 12162.1995, EN 558-1.1995, EN 558-2 that are not
cited in the standard.1995, EN 736-1.1995, EN736-2.1997, EN 736-
3.1999, EN 1092-1.2001, EN 1267.1997, EN 1759-1.2004, EN
12107.1997, EN 12266-1.2003 which are not cited in the standard;
• ADD reference to GB/T 2828.1-2012 (see 8.3.2);
• ADD reference to GB/T 2918-2018 (see 7.1);
• ADD reference to GB/T 8806-2008 (see 7.3);
• ADD reference to GB/T 17219 (see 6.11);
• ADD reference to GB/T 19278-2018 (see Chapter 3);
• ADD reference to GB/T 21300-2007 (see 7.10);
• ADD reference to GB/T 30832-2014 (see 7.6);
- ADD the shell material requirements of the "polyphenylene ether
(PPO/PPE), polyphenylene sulfone (PPSU), polyamide (PA)" (see 4.1);
- MODIFY the requirements of 4.1.2.2c) in ISO 16135.2006; CHANGE it into
that according to the definition of terms in GB/T 19278-2018, provide the
dimensional requirements of clearway valves, full bore valves, reduced
bore valves (see 6.3.2);
- INCREASE the number of cycles of fatigue strength of ball valves with dn <
63 mm from 5000 to 15000; the number of cycles of fatigue strength of ball
valves with dn ≥ 63 mm is 5000, which is consistent with ISO 16135.2006
(see 6.9).
This standard has made the following editorial changes.
- MODIFY the standard name to "Ball valves of thermoplastics materials";
- Specifications and sizes are expressed by the nominal outer diameter dn
(see Chapter 1);
- This part incorporates the revised content of ISO 16135.2006/FD Amd 1,
which revised the derating factor fr. The clauses involved in these revisions
have been marked by the vertical double line (||) on the outer margin of the
margin. (See Table 1 in 4.3.2).
Please note that some of the contents of this document may involve patents.
The issuing agency of this document is not responsible for identifying these
patents.
This standard was proposed by the China National Light Industry Council.
This standard shall be under the jurisdiction of the National Standardization
Technical Committee for Plastic Products (SAC/TC 48).
The main drafting organizations of this standard. Shanghai Sanshan Xinbang
Technology Co., Ltd., Beijing Building Materials Inspection and Research
Institute Co., Ltd. (National Water-saving Appliance Product Quality
Supervision and Inspection Center), Shijiazhuang Development Zone Zhongshi
Testing Equipment Co., Ltd., Chengde Precision Testing Machine Co., Ltd.,
Zhejiang Zhongcai Pipeline Technology Co., Ltd., Yonggao Co., Ltd., Wenzhou
Runxin Machinery Manufacturing Co., Ltd., Zibo Jielin Plastic Pipe Co., Ltd.,
Nansu Building Materials Plastic Products (Shenzhen) Co., Ltd., Cangzhou
Mingzhu Plastic Co., Ltd., Shanghai Baidie Pipe Industry Technology Co., Ltd.,
Baolu Qixing Pipe Industry Co., Ltd., Guangdong Liansu Technology Industrial
Co., Ltd., Zhejiang Xinda Plastic Pipe Fitting Co., Ltd.
The main drafters of this standard. Zhu Liping, Li Yanjun, Dang Xiaogang, Wang
Xinhua, Wang Baiti, Huang Jian, Yuan Hailin, Xue Yanchao, Wang Wenbi, Yang
Jian, Chai Gang, Xu Hongyue, Li Tongyi, Wang Lijun, Zhang Xuehua.
Ball valves of thermoplastics materials
1 Scope
This standard specifies the terms, definitions and symbols, materials, design,
requirements, test methods, inspection rules, signs, packaging, transportation
and storage of ball valves of thermoplastics materials (hereinafter referred to
as ball valves).
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
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 (AQL) (ISO 2859-1.1999, IDT)
3 Terms, definitions and symbols
The terms and definitions as defined in GB/T 19278-2018 as well as the
following terms and definitions apply to this document.
4 Materials
The selection of materials for other components such as seals, stems, balls
shall ensure that the performance of the ball valve meets the requirements
specified in Chapter 6; these materials shall not adversely affect the
performance of the ball valve.
5 Design
The wall thickness of pressure-bearing parts such as shells and balls can be
calculated with reference to GB/T 150.3-2011.It shall be greater than the wall
thickness of pipes of the same material, same pipe series and the same
specifications; meanwhile it shall meet the requirements of 6.4, 6.5, 6.9.
6 Requirements
When the pressure difference is equal to the nominal pressure PN, the torque
value of the ball valve fully opened or fully closed shall not be greater than the
nominal value given by the manufacturer.
The ball valve used to transport drinking water shall meet the requirements of
GB/T 17219.
7 Test method
Measure according to GB/T 8806-2008.The minimum flow area is calculated
according to the measured size.
Carry out the fatigue strength cyclic test of the opening & closing of the ball
valve according to Appendix C of GB/T 28494-2012; meanwhile it shall meet
the following requirements.
8 Inspection rules
Appearance, color and size shall be judged according to Table 7.If there is one
non-conformity in the hygiene requirements of the ball valve used to transport
drinking water, it is judged as an unqualified batch (or product).
9 Marking, packaging, transportation and storage
During loading, unloading and transportation, the ball valve must not be
exposed to the sun, rain, stain, heavy pressure, thrown or damaged.
The ball valve shall be stored indoors and away from heat sources.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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