GB/T 45323-2025 in English
VALIDCoding rules for urban heating system identification
- Issued on:2025-02-28
- Implemented on:2025-09-01
- File Format:PDF
- Delivery:Via email within 8 business days
$582.00
| Standard No: | GB/T 45323-2025 |
| Document status: | VALID |
| Title in English: | Coding rules for urban heating system identification |
| Title in Chinese: | 城镇供热系统标识编码规则 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 8 business days |
| Issued on: | 2025-02-28 |
| Implemented on: | 2025-09-01 |
| ICS Classification: | 91.140.10-Central heating systems |
| Chinese Classification: | P46-Heat supply and heating engineering |
| Professional Classification: | GB-National Standard |
| Related Keywords: | joint identification → function identification → product identification
urban heating system identification introduction analysis identification structure system a subdivision code + system code + equipment joint identification |
| Related Topics: | town
|
《GB/T 45323-2025城镇供热系统标识编码规则》由TC455（全国城镇供热标准化技术委员会）归口，主管部门为住房城乡建设部。
Introduction
Analysis of the core framework of the standard
| Identification type | Coding level | Component elements | Application scenarios |
|---|---|---|---|
| Joint identification | Level 2 | Geographic location code + project type code | Cross-regional pipe network system |
| Functional identification | Level 3 | Project subdivision code + system code + equipment code | Internal equipment of thermal power station |
| Product identification | Level 1 | Product classification + number | Independent equipment such as valves/instruments |
Key Technical Points
4.1 Identification Structure System
A six-level tree-like coding structure is adopted: Joint identification → Function identification → Product identification, among which:
- Heat source system shall give priority to using Class E engineering type code (E001-E999)
- Pipeline system is classified by L/W/Y, with additional 7-digit postal code positioning
- Thermal power station adopts the special coding segment S951-S959
5.2 Joint identification coding rules
| Code segment | Length | Encoding rule | Example |
|---|---|---|---|
| C1-C6 | 6 digits | Postal code | 100010 |
| C7 | 1 digit | Regional subdivision code (0-9) | 2 |
| U1 | 1 digit | Engineering type letter code | W |
| U2-U4 | 3 digits | Sequence number | 001 |
Implementation recommendations
8.2 Key points of project agreements
- Establish a coding index file to manage S4S5 system numbers
- Use a special code of Y+three-digit building number for the tertiary pipe network
- Equipment labels should include complete prefix symbols (such as #, =)
Analysis of standard evolution
Compared with the old version of the specification, the 2025 version has the following major improvements:
- Added new energy heat source classifications such as heat pump station (04) and solar station (05)
- Refine the floor coding rules for building-type thermal power stations (ZSB)
- Supplement the electronic identification requirements for IoT devices
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