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CJ/T 217-2013 English PDF (CJT217-2013)

CJ/T 217-2013 English PDF (CJT217-2013)

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CJ/T 217-2013: Compound quick air inbreathe-release valve for water supply pipeline

This Standard specifies the term and definition, structure style, product model, materials, requirements, test methods, inspection rules, marks, product specification, product packaging, storage and transportation of compound quick air inbreathe-release valve for water supply pipeline (hereinafter referred to as air inbreathe-release valve). This Standard applies to the air inbreathe-release valve of nominal size of DN15~DN300, nominal pressure of not more than PN25, and water temperature of 0~40 degree-Celcius for water supply pipeline.
CJ/T 217-2013
ICS 91.140.01
P 41
INDUSTRY STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replaces CJ/T 217-2005
Compound quick air inbreathe-release valve for
water supply pipeline
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ISSUED ON. APRIL 27, 2013
IMPLEMENTED ON. OCTOBER 1, 2013
Issued by. Ministry of Housing and Urban-Rural Development of the
People's Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Structural type ... 7
5 Product model ... 8
6 Materials ... 8
7 Requirements ... 8
8 Test methods... 11
9 Inspection rules ... 13
10 Mark and product instructions ... 15
11 Packing, storage and transportation ... 15
Appendix A ... 16
Appendix B ... 18
Appendix C ... 20
Appendix D ... 21
Appendix E ... 26
Appendix F ... 27
Foreword
This Standard is drafted according to the rules specified in GB/T 1.1-2009. The Standard is an amendment to CJ/T 217-2005 Compound Quick Air
Inbreathe-Release Valve for Water Supply Pipeline. This Standard, in comparison with CJ/T 217-2005, has the major technical changes as follows.
?€? Modify the scope of application for nominal size, nominal pressure and water temperature in Chapter 1;
?€? Modify the introduction paragraph. And change the normative references in Chapter 2;
?€? Add the terms and definitions of floating body, floating body module, large intake and exhausted hole, and small intake and exhausted hole;
?€? Modify the terms and definitions of "air pressure when closing of air inbreathe-release valve";
?€? Delete the section materials in the Chapter "Requirements?€?. And create a new chapter for the materials;
?€? Add the copper alloy as valve body materials;
?€? Add the carbon structural steel as part materials;
?€? Add the exhaust volume parameters of nominal size for DN15~DN50 in Table 2; ?€? Add the requirements - installing a protective cover outside the air intake and exhaust passage in-between the valve body and valve bonnet;
?€? Add the content of inspection items in previous Table 4 "Inspection and Test Items". And revise and edit it as Table 3 "Inspection Items";
?€? Modify the presentation form of sampling inspection. And delete the previous Table 3 "Sampling Table for Ex-factory Test Sample";
?€? Modify the previous Figure 1 of monolithic structure style for air inbreathe-release valve TO Figure A.1a). Remove the structure diagram out from the main body, and incorporate it into Appendix A;
?€? Add the Figure A.1c) Basic structure style in Appendix A "Air Inbreathe-Release Valve of Threaded Connection";
?€? Add the specifications and quantity of curve of intake and exhaust volume in Figure A.1 of previous Appendix A. And change the Appendix A to Appendix C;
?€? Delete the previous Appendix C, and incorporate the Figure C.2 in previous Appendix C into Appendix F;
?€? Delete the Section "Test Report" in previous Chapter 9;
?€? Delete the "Test Report Card" in previous Appendix E. And change the previous Appendix D to Appendix E;
?€? Modify the content of Chapter 5 "Product Model". And incorporate 5.1 and 5.2 into Appendix B;
?€? Delete the B.1 "Calculate the Exhaust Volume Measured by the Law of
Conservation of Mass" in previous Appendix B. Incorporate the previous B.2 "Calculate the Exhaust Volume Measured by orifice plate" into Appendix D. And add the calculation Formula of pressure differential between inlet pressure and outlet pressure when the air inbreathe-release valve releases.
The Standard takes reference to the compilation of ANSI/AWWA C512-2004 Air-release, Air/vacuum, And Combination Air Values For Waterworks Service.
This Standard was proposed by Standard Rating Institute of Ministry of Housing and Urban-rural Development.
This standard shall be under jurisdiction of Municipal Water Supply and Drainage Standardization Technical Committee of the Ministry of Housing and Urban-rural Development.
This Standard is drafted by. Guangdong Yongquan Valve Science and Technology Co., Ltd., Guangdong Zhude Industrial Co., Ltd., and Beijing Yongquan Tengda Valve Science and Technology Co., Ltd.
The main drafters of this Standard. Chen Jianming, Liang Jianlin, Cheng Yuanjun, Wu Baimin, Pan Qingxiang, and Chen Yanming.
The previous version of the standard replaced by this standard is as follows. ?€? CJ/T 217-2005.
Compound quick air inbreathe-release valve for water
supply pipeline
1 Scope
This Standard specifies the term and definition, structure style, product model, materials, requirements, test methods, inspection rules, marks, product specification, product packaging, storage and transportation of compound quick air inbreathe-release valve for water supply pipeline (hereinafter referred to as air inbreathe-release valve). The Standard applies to the air inbreathe-release valve of nominal size of DN15~DN300, nominal pressure of not more than PN25, and water temperature of 0??C~40??C for water supply pipeline.
2 Normative references
The articles contained in the following documents become part of this standard when they are quoted herein. For the dated documents so quoted, only the dated versions apply to this document. For undated reference documents, the latest versions (including all corrections) apply to this Standard.
GB/T 196 General purpose metric screw threads?€?Basic dimensions
GB/T 197 General purpose metric screw threads?€?Tolerances
GB/T 700 Carbon structural steels
GB/T 1047 Pipework components--Definition and selection of DN(nominal size) GB/T 1048 Pipework components--Definition and selection of PN
GB/T 3098 (All parts) Mechanical properties of fasteners
GB/T 3280 Cold rolled stainless steel plate sheet and strip
GB/T 6739-2006 Paints and varnishes - Determination of film hardness by pencil test
GB/T 7306.2 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads--Part 2. Taper internal and external threads
GB/T 8923-2008 Preparation of steel substrates before application of paints and related products
GB/T 9286-1998 Paints and varnishes-Cross cut test for films
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB/T 12220 General purpose industrial valves???Marking
GB/T 12225 General purpose industrial valves??? Specification of copper alloy castings
GB/T 12227 General purpose industrial valve - Specification of spheroidal graphite iron castings
GB/T 13927 Industrial valves - Pressure testing
GB/T 17241.6 Integral cast iron pipe flanges
GB/T 17241.7 Specifications for cast iron pipe flanges
GB/T 21873 Rubber seals - Joint rings for water supply drainage and sewerage pipelines - Specification for materials
JB/T 308 Valves model designation method
JB/T 7928 General purpose industrial valve - Delivery specification
3 Terms and definitions
For the purpose of this standard, the following terms and definitions shall apply. 3.1
Compound quick air inbreathe-release valve for water supply pipeline
The air intake and exhaust device equipped with large and small intake and exhausted holes. It can quickly exhaust the air when the pipeline is filled by water. It can quickly intake the air when negative pressure is generated in the pipeline. It can discharge the small amount of air gathered in pipeline under the normal working state. It can automatically close the valve after exhaust.
3.2
Exhaust volume
The gas volume exhausted outward by air inbreathe-release valve, in unit of time. 3.3
Pressure differential of inlet and outlet when closed by drained air
When air inbreathe-release valve exhausts large amount of gas, the floating body will block the large intake and exhausted hole. It causes the difference between valve inlet pressure and outlet pressure when the air inbreathe-release valve is closed. 3.4
Inlet pressure of air release valve
The sum of static pressure at the pressure-measuring section of air inbreathe-release valve inlet AND the gas kinetic energy of unit volume.
3.5
Pressure diffe...

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