GB/T 45323-2025 Coding rules for urban heating system identification English, Anglais, Englisch, Inglés, えいご
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ICS 91.140.10
CCS P 46
National Standard of the People's Republic of China
GB/T 45323-2025
Coding rules for urban heating system identification
城镇供热系统标识编码规则
(English Translation)
Issue date: 2025-02-28 Implementation date: 2025-09-01
Issued by the State Administration for Market Regulation
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Identification
5 Joint identification
6 Functional identification
7 Product identification
8 Implementation of identification coding
Annex A (Normative) System/building/structure classification index table
Annex B (Normative) Equipment/product classification index table
Annex C (Informative) Common system identification coding methods
Bibliography
Coding rules for urban heating system identification
1 Scope
This document specifies the identification, joint identification, functional identification, product identification and the implementation of identification coding for urban heating systems.
This document applies to the identification and coding of the following components of urban heating systems:
a) Heating sources without power generation;
b) Hot water pipe networks and steam pipe networks;
c) Heat network initial stations, heat exchange stations, pressure isolation stations, and booster pump stations;
d) Hot water users and steam users.
2 Normative references
This document contains no normative references.
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
identification
unique mark assigned to a physical object to distinguish it from other physical objects
3.2
code
symbol that identifies a physical object through a combination of characters and numbers arranged in a certain rule
3.3
notation
process of recording identification symbols or codes
3.4
identification character name
special character specified for the structure of identification codes
Note: Composed of uppercase English letters and numerical subscripts.
3.5
prefix
character located before the identification to distinguish the type of identification
3.6
coding index
document for retrieving the codes of identified objects, sorted by English letters
3.7
engineering subdivision code
code that further subdivides the engineering type code
4 Identification
4.1 Structure and composition
4.1.1 The identification of urban heating systems shall be a combination of joint identification, functional identification and product identification, coded hierarchically from Level 1 to Level 6. The identification structure is shown in Figure 1. The product identification may be omitted according to the actual situation of the identified object.
4.1.2 The joint identification shall consist of geographical location code and engineering type code.
4.1.3 The functional identification shall consist of engineering subdivision code, system/building/structure code and equipment/room code.
4.1.4 The product identification shall consist of product code and may be used in conjunction with the functional identification.
4.2 Identification prefix
4.2.1 The identification prefixes are shown in Table 1.
4.2.2 The use of identification prefixes shall be implemented in accordance with the following provisions:
a) The prefix shall not be omitted in design documents;
b) The prefix may be omitted during computer input.
4.3 Identification characters
4.3.1 Identification characters shall consist of Arabic numerals and uppercase English letters. Uppercase English letters I and O shall not be used. In this document, N represents Arabic numerals and A represents uppercase English letters.
4.3.2 The wildcard "*" represents any letter or number. It represents a letter when following a letter, and a number when following a number.
5 Joint identification
5.1 Structure and composition
5.1.1 The joint identification identifies geographical location and engineering type, with its usage form and specific content determined by system conditions and included in the engineering agreement.
5.1.2 The joint identification adopts a two-level coding system, whose structure and composition shall comply with Figure 2.
5.2 Coding
5.2.1 Geographic location code
5.2.1.1 The first six digits C1C2C3C4C5C6 of the geographical location code are the six-digit postal code, indicating the project's geographical location. For pipe networks crossing postal code areas, the upper-level postal code may be used.
5.2.1.2 The seventh digit C7 of the geographical location code is an additional code, used to subdivide the geographical location code, consisting of one digit. The additional code rules are as follows:
a) When the coding of engineering projects in the same postal code area is insufficient for subdivision, additional codes 1, 2, 3, …, 9 may be adopted after the postal code, indicating that the postal code area is divided into 1, 2, 3, …, 9 districts;
b) When there is no need to subdivide the geographical location code, C7 shall be 0.
