GB/T 13295-2019 PDF English
US$1495.00 · In stock · Download in 9 secondsGB/T 13295-2019: [Including 2021XG1] Ductile iron pipes, fittings and accessories for water or gas applications Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 13295: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 13295-2019 | English | 1495 |
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[Including 2021XG1] Ductile iron pipes, fittings and accessories for water or gas applications
| Valid |
| GB/T 13295-2013 | English | RFQ |
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13 days
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Ductile iron pipes, fittings and accessories for water or gas applications
| Obsolete |
| GB/T 13295-2008 | English | RFQ |
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14 days
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Ductile iron pipes, fittings and accessories for water or gas applications
| Obsolete |
| GB/T 13295-2003 | English | RFQ |
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14 days
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Ductile iron pipes, fittings and accessories for water or gas applications
| Obsolete |
| GB/T 13295-1991 | English | RFQ |
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6 days
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(Centrifugal casting ductile iron pipe)
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 13295-2019
GB/T 13295-2019: [Including 2021XG1] Ductile iron pipes, fittings and accessories for water or gas applications
---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/GBT13295-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.10; 23.040.40
H 48
Replacing GB/T 13295-2013
Ductile iron pipes, fittings and accessories for water or gas
applications
(ISO 2531.2009, Ductile iron pipes, fittings, accessories and their joints
for water applications, MOD)
[Including 2021XG1]
Issued on. DECEMBER 10, 2019
Implemented on. APRIL 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Technical requirements... 13
4.1 General... 13
4.2 Pressure, wall thickness and dimensional requirements... 16
4.3 Material characteristics... 23
4.4 Coating and linings for pipes... 24
4.5 Marking... 26
5 Leaktightness requirements... 27
5.1 Pipes and fittings... 27
5.2 Flexible joints... 27
5.3 Flanged joints as cast, screwed, welded and adjustable... 29
6 Test methods... 32
6.1 Dimensions... 32
6.2 Straightness of pipes... 33
6.3 Tensile test... 33
6.4 Brinell hardness... 35
6.5 Works leaktightness test of pipes and fittings... 36
6.6 Coating and linings... 37
7 Type tests... 38
7.1 General... 38
7.2 Leaktightness of joints to internal pressure... 38
7.3 Leaktightness of joints to outer pressure... 39
7.4 Leaktightness of joints under negative internal pressure... 40
7.5 Leaktightness of joints to cycle pressure... 40
7.6 Tightness and mechanical stress of flanged joints... 41
8 Factory inspection and quality certificate... 42
8.1 Inspection and acceptance... 42
8.2 Batch rules... 42
8.3 Sampling quantity... 42
8.4 Quality certificate... 42
9 Tables of dimensions... 43
9.1 Socket and spigot pipes... 43
9.2 Flanged pipes... 46
9.3 Fittings for socketed joints... 46
9.4 Fittings for flanged joints... 85
Appendix A (Informative) Comparison of chapter numbers of this Standard and chapter
numbers of ISO 2531.2009... 102
Appendix B (Informative) Technical differences between this Standard and ISO
2531.2009 and their reasons... 105
Appendix C (Informative) Allowable pressure... 110
Appendix D (Informative) Dimensions of preferred pipe pressure classes... 113
Appendix E (Normative) Pipe wall thicknesses, diametral stiffness and diametral
deflection... 115
Appendix F (Informative) External anti-corrosion... 123
Appendix G (Informative) Internal anti-corrosion... 125
Appendix H (Informative) Safety factors... 127
Appendix I (Normative) Quality assurance... 128
Appendix J (Informative) Condenser cylinder... 129
Bibliography... 132
No. 1 Amendment [2021XG1]... 132
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 13295-2013, Ductile iron pipes, fittings and accessories
for water or gas applications; compared with GB/T 13295-2013, the major technical
changes are as follows.
-- Modify the description of some terms and definitions;
-- Extend the scope of application of pressure classified pipes to specifications below
DN2600;
-- Add relevant requirements for ductile iron pipes, DN2800 and DN3000;
-- Modify the zinc layer spray weight requirements for pressure classified pipes;
-- Add the requirements for the type test of leaktightness of joints to cycle pressure;
-- Adjust the wall thickness level of socket tee with single support and socket tee
with flanged branch in fittings to K12.
This Standard uses the redraft method to revise and adopt ISO 2531.2009 Ductile iron
pipes, fittings, accessories and their joints for water applications.
Compared with ISO 2531.2009, this Standard makes many adjustments in structure.
Appendix A gives a comparison list in chapter numbers between this Standard and ISO
2531.2009.
There are technical differences between this Standard and ISO 2531.2009; the terms
which are involved in these differences have been marked by a vertical single line (|)
on the outer page margins. Appendix B gives a list of technical differences between this
Standard and ISO 2531.2009 and their reasons for reference.
This Standard makes the following editorial changes.
-- Change the standard name to Ductile iron pipes, fittings and accessories for water
or gas applications.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee on Iron
and Steel of Standardization Administration of China (SAC/TC 183).
Drafting organizations of this Standard. Xinxing Ductile Iron Pipes Co., Ltd., Saint
Gobain Piping System Co., Ltd., China Metallurgical Information and Standardization
Institute, Suns Pipelines Company Limited, Anhui Hengsheng Science & Technology
Development Group Co., Ltd., North China Municipal Engineering Design & Research
Institute Co., Ltd., China Metallurgical Construction Research Institute Co., Ltd.
Main drafters of this Standard. Li Chengzhang, Li Jun, Shen Yong, Wang Song, Sun
Shu, Hou Jie, Fu Jian, He Gen, Ding Baohua, Wang Liangmei, Dong Jianzhong, Li
Huacheng, Zhou Yan, Wang Jingyu, Liu Yanxue, Dong Li, Wang Qi, Wang Junjie, Ye
Weihe, Li Jianwu, Li Xiaoliang.
The previous version – replaced by this Standard – of the standard is.
-- GB/T 13294-1991;
-- GB/T 13295-1991, GB/T 13295-2003, GB/T 13295-2008, GB/T 13295-2013.
Ductile iron pipes, fittings and accessories for water or gas
applications
1 Scope
This Standard specifies the terms and definitions, technical requirements, test methods,
dimensions and tolerances, inspection rules and quality certificate for ductile iron pipes,
fittings, accessories and their joints for water or gas applications, which are processed
by any type of casting process or assembled from cast iron parts; this Standard also
gives the type test requirements for joint components.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 41-2016, Hexagon nuts, style 1 - Product grade C (ISO 4034.2012, MOD)
GB/T 95, Plain washers - Product grade C (GB/T 95-2002, ISO 7091.2000, IDT)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
Ductile iron castings, other than pipes, which allow for line deflection, direction
changes, branching, caliber changes, and joint type changes.
4 Technical requirements
Flanged joints shall be designed to comply with GB/T 17241.6 or ISO 7005-2.Bolts
and nuts shall comply, as a minimum, with the requirements of GB/T 5780-2016 and
GB/T 41-2016, property class 4.6 and 5 respectively.
5 Leaktightness requirements
The leaktightness of joints to external pressure shall be type tested as specified in 7.3;
the joints shall exhibit no visible leakage when subjected to a shear load, expressed in
newtons, not less than 30 times the nominal diameter, DN. The test pressure shall be
not less than 0.2 MPa.
6 Test methods
The inner diameter is measured by using suitable equipment such as templates and other
tools to measure twice at a right angle to each other on the cross section at or above 200
mm from the end face, and calculating the average value of the two measurement results,
or by using a go-no-go gauge for inspection.
The straightness is usually visually inspected. In case of dispute, the following method
shall be adopted for inspection.
7 Type tests
The test assembly shall consist of two pipes or fittings with flanges of the same
specification, which shall be assembled using the bolts and washers specified by the
manufacturer.
8 Factory inspection and quality certificate
The inspection and acceptance of ductile iron pipes and fittings is carried out by the
manufacturer’s technical quality supervision department.
When the product leaves the factory, a product quality certificate shall be attached, and
the certificate shall at least include the following contents.
9 Tables of dimensions
The structure diagram of the double-socket 90° (1/4) bend is shown in Figure 8,
and the dimensions of the double-socket 90° (1/4) bend shall comply with Table 19.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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