GB/T 1047-2019_English: PDF (GB/T1047-2019)
Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
GB/T 1047-2019 | English | 75 |
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Pipework components -- Definition and selection of nominal size
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GB/T 1047-2019
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GB/T 1047-2005 | English | 70 |
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Pipework components -- Definition and selection of DN (nominal size)
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GB/T 1047-2005
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GB/T 1047-1995 | English | 199 |
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Nominal size for pipe components
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GB/T 1047-1995
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GB 1047-1970 | English | 199 |
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Nominal inside diameters for pipes and pipe line accessories
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GB 1047-1970
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Standard ID | GB/T 1047-2019 (GB/T1047-2019) | Description (Translated English) | Pipework components -- Definition and selection of nominal size | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | J15 | Classification of International Standard | 23.040.60 | Word Count Estimation | 6,631 | Date of Issue | 2019-03-25 | Date of Implementation | 2019-10-01 | Drafting Organization | China Machinery Productivity Promotion Center, Sinopec Engineering Construction Co., Ltd., China Metallurgical Jingcheng Engineering Technology Co., Ltd., China Machinery Guoneng Electric Power Engineering Co., Ltd., China Energy Construction Group Guangdong Electric Power Design and Research Institute Co., Ltd., Chaoda Valve Group Co., Ltd. Company, China Shipbuilding Industry Research Institute of Comprehensive Technology and Economics, Saint-Gobain Pipeline System Co., Ltd., East China University of Science and Technology | Administrative Organization | National Technical Committee for Standardization of Piping Accessories (SAC/TC 237) | Proposing organization | China Machinery Industry Federation | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | Standard ID | GB/T 1047-2005 (GB/T1047-2005) | Description (Translated English) | Pipework components. Definition and selection of DN(nominal size) | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | J15 | Classification of International Standard | 23.040.60 | Word Count Estimation | 4,427 | Date of Issue | 2005-01-13 | Date of Implementation | 2005-08-01 | Older Standard (superseded by this standard) | GB/T 1047-1995 | Adopted Standard | ISO 6708-1995; MOD | Drafting Organization | Mechanical Engineering Research Institute | Administrative Organization | National Standardization Technical Committee piping accessories | Regulation (derived from) | Announcement of Newly Approved National Standards No. 2, 2005 (No. 76 overall) | Proposing organization | China Machinery Industry Federation | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee | Summary | This standard specifies: DN-definition and series. This standard applies to: Use the DN identity as specified in the relevant standard piping components. | Standard ID | GB/T 1047-1995 (GB/T1047-1995) | Description (Translated English) | Nominal size for pipe components | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | J15 | Classification of International Standard | 23.040.90 | Word Count Estimation | 4,478 | Date of Issue | 1995/6/15 | Date of Implementation | 1996/2/1 | Older Standard (superseded by this standard) | GB 1047-1970 | Regulation (derived from) | Announcement of Newly Approved National Standards 2005 No. (No. 76 overall) 2 | Proposing organization | Ministry of Machinery Industry of the People Republic of China | Issuing agency(ies) | State Bureau of Technical Supervision |
GB/T 1047-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.60
J 15
Replacing GB/T 1047-2005
Pipework components -
Definition and selection of nominal size
(ISO 6708:1995, Pipework components -
Definition and selection of DN (nominal size), NEQ)
ISSUED ON: MARCH 25, 2019
IMPLEMENTED ON: OCTOBER 1, 2019
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Terms and definitions ... 4
3 DN series and selection ... 4
Annex A (Informative) Correspondence between nominal size (DN) and
NPS ... 6
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 1047-2005, Pipework components – Definition and
selection of DN (nominal size). Compared with GB/T 1047-2005, in addition to editorial
changes, the major technical changes are as follows:
-- it adds nominal sizes DN 550, DN 650, DN 750, DN 850, DN 950, DN 1050, DN
1150, DN 1300, DN 1700, DN 1900, DN 2100, DN 2300, DN 2500, DN 2700, DN
2700 and DN 2900 (see 3.1; Clause 3 of 2005 edition);
-- it adds the correspondence between nominal size DN and NPS (see Annex A).
This Standard was redrafted by referencing to ISO 6708:1995, Pipework components
– Definition and selection of DN (nominal size). This standard was nonequivalent to
ISO 6708:1995.
This Standard was proposed by the China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee 237 on
Pipeline Fittings of Standardization Administration of China (SAC/TC 237).
The drafting organizations of this Standard: China Productivity Center for Machinery,
Sinopec Engineering Incorporation, MCC Capital Engineering and Research
Incorporation Co., Ltd., China Sinogy Electric Engineering Co., Ltd., China Energy
Engineering Group Guangdong Electric Power Design Institute Co., Ltd., Chaoda
Valve Group Co., Ltd., China Institute of Marine Technology and Economy, Saint-
Gobain Pipework System Co., Ltd., East China University of Science and Technology.
The main drafters of this Standard: Li Junying, Feng, Zhao Yong, Wu Shiming, Lin
Qilve, Huang Tao, Qiu Xiaolai, Zhang Meiling, He Gen, Zhang Lanzhu.
The previous editions of the standard replaced by this Standard are as follows:
-- GB/T 1047-1970, GB/T 1047-1995, GB/T 1047-2005.
Pipework components -
Definition and selection of nominal size
1 Scope
This Standard gives the definition of DN (nominal size) of pipework components, and
specifies the nominal size series used for pipework components.
This Standard applies to pipework components which use the DN designation system.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
nominal size
An alphanumeric designation of size for components of a pipework system, which is
used for reference purposes. It comprises the letters DN followed by a dimensionless
whole number.
NOTE 1: This dimensionless number is directly related to the physical size, in millimetres, of
the bore or outside diameter of the end connections.
NOTE 2: The number following the letters DN does not represent a measurable value and
should not be used for calculation purposes except where specified in the relevant standard.
3 DN series and selection
3.1 The preferred DN values are as follows:
......
GB/T 1047-2005
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.60
J 15
Replacing GB/T 1047-1995
Pipework components - Definition
and selection of DN (nominal size)
(ISO 6708.1995, MOD)
ISSUED ON. JANUARY 13, 2005
IMPLEMENTED ON. AUGUST 01, 2005
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Definition ... 4
3 DN series ... 4
Pipework components - Definition
and selection of DN (nominal size)
1 Scope
This standard specifies the definition and series of DN (nominal size).
This standard applies to pipework components specified in the relevant
standards using the DN marking.
Note. Other size marking methods different from this standard can also be used,
such as the pipework components of threading, press fitting, socket welding or
butt welding, or the pipework components which are marked by NPS (nominal
pipe size), OD (outer diameter), ID (inner diameter) or G (pipe thread size
marking).
2 Definition
DN. Size marking for the combination of letters and numbers for piping system
components. It consists of the letter DN followed by a dimensionless integer
number. This number is directly related to the feature size such as the hole
diameter or outer diameter (in mm) of the end connector.
Note 1. Except as otherwise provided in the relevant standards, the number
after the letter DN does not represent the measured value and cannot be used
for calculation purposes.
Note 2. For those standards using the DN marking system, it shall give the
relationship between the DN and the size of the pipework components, such as
DN/OD or DN/ID.
3 DN series
The preferred DN values are as follows.
......
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