GB/T 12712-2023 English PDF

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GB/T 12712-2023: Technical management requirements for condensate recovery and automatic steam traps of steam heating system
Status: Valid

GB/T 12712: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12712-2023	349	Add to Cart	4 days	Technical management requirements for condensate recovery and automatic steam traps of steam heating system	Valid
GB/T 12712-1991	479	Add to Cart	3 days	requirements for supervision of recovery of condensate from steam heating system and technique of automatic steam traps	Obsolete

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Basic data

Standard ID: GB/T 12712-2023 (GB/T12712-2023)
Description (Translated English): Technical management requirements for condensate recovery and automatic steam traps of steam heating system
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: F01
Classification of International Standard: 27.010
Word Count Estimation: 18,192
Date of Issue: 2023-09-07
Date of Implementation: 2024-04-01
Older Standard (superseded by this standard): GB/T 12712-1991
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 12712-2023: Technical management requirements for condensate recovery and automatic steam traps of steam heating system

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 27.010 CCSF01 National Standards of People's Republic of China Replace GB/T 12712-1991 Condensate recovery and steam trap in steam heating system Technical management requirements Published on 2023-09-07 2024-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

PrefaceⅠ 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Principles of condensate recovery 2 5 Basic formula for hydraulic calculation of condensate pipeline 2 5.1 Calculation of friction coefficient 2 5.2 Specific pressure drop calculation 2 6 Technical requirements for condensate recovery system 2 6.1 System Division 2 6.2 System selection and determination 3 6.3 System application technical conditions 3 6.4 Other technical requirements of the system 5 7 Technical requirements for steam traps 6 7.1 Category 6 7.2 Setting 6 7.3 Selection Principle 6 7.4 Parameter determination 6 7.5 Installation 7 8 Management and Evaluation Requirements 8 8.1 System and personnel 8 8.2 Operation and Monitoring 8 8.3 Maintenance, care and overhaul9 8.4 Rating 9 Appendix A (informative) Recommended safety rate for steam trap selection 10 Appendix B (Informative) Steam Trap File Card 12 Appendix C (informative) Condensate recovery and usage ledger 13 Reference 14

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 12712-1991 "Technical Management Requirements for Condensate Recovery and Steam Traps in Steam Heating Systems" and is consistent with Compared with GB/T 12712-1991, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Added the terms and definitions of “steam trap equipment rate” and “steam trap sampling rate” (see 3.2, 3.3); deleted “open type” System", "Closed system", "Calculation of steam content in pipe sections", "Unit drainage method", "Group drainage method", "Actual working of steam traps" "Pressure", "Actual operating back pressure of steam trap", "Actual maximum operating back pressure of steam trap" terms and definitions (see 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10 of the.1991 edition); b) Changed the principle of condensate recovery (see Chapter 4, Chapter 5 of the.1991 edition); c) The technical requirements for the condensate recovery system have been changed and the technical requirements for the open system have been added (see Chapter 6, Chapter 6 of the.1991 edition) Chapter 8); d) The technical requirements for steam traps have been changed, and the classification of steam traps has been added (see Chapter 7, Chapter 7 of the.1991 edition, Chapter 9); e) Management and evaluation requirements have been changed, and system management requirements have been added (see Chapter 8, Chapter 10 and 11 of the.1991 edition); f) The appendix "Steam Trap Action Detection Method" has been deleted (see Appendix A of the.1991 edition). Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed and coordinated by the National Energy Basics and Management Standardization Technical Committee (SAC/TC20). This document was drafted by. China Institute of Standardization, Gansu Hongfeng Machinery Co., Ltd., Yinqiu Energy Saving Engineering Co., Ltd., Dalian China Zhi Precision Technology Co., Ltd., Newton Fluid Technology Co., Ltd., Fleur Antimony (Guangdong) Engineering Equipment Co., Ltd., China Energy Construction Group Tianjin Electric Power Construction Co., Ltd., PetroChina Jilin Chemical Engineering Co., Ltd. The main drafters of this document. Liang Xiuying, Guo Yudong, Li Bingcheng, Huang Ying, Shao Guijun, Chen Haihong, Wei Hong, Zhang Sinan, Wang Shuiyuan, Zhang Qingnian, Zhang Yifeng and Dai Guoxing. This document was first published in.1991 and this is the first revision. Condensate recovery and steam trap in steam heating system Technical management requirements

1 Scope

This document establishes the principle of condensate water recovery in steam heating systems, provides the basic formula for hydraulic calculation of condensate water pipelines, and stipulates the Technical requirements and management and evaluation requirements for the selection, installation and application of water recovery systems and steam traps. This document is applicable to the drainage and return of condensate water in steam heating systems with a nominal pressure not greater than PN40 and a medium temperature not greater than 350°C. Design, installation, commissioning and operation management of collection systems.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 150.1 Pressure vessels Part 1.General requirements GB/T 4272 General rules for thermal insulation technology of equipment and pipelines GB/T 12247 Steam trap classification GB/T 12250 Steam Trap Terminology, Symbols, Structural Length GB/T 12251 Steam trap test method GB/T 22654 Technical specifications for steam traps JB/T 11170 Condensate and exhaust steam closed recovery water pump device

3 Terms and definitions

The terms and definitions defined in GB/T 12247 and GB/T 12250 and the following apply to this document. 3.1 specificpressuredrop The resistance loss along the unit length of the condensate pipeline. 3.2 The actual number of steam traps installed accounts for the percentage of the number of steam traps that should be installed in the condensate recovery system. 3.3 Among the steam traps randomly inspected, the number of qualified steam traps accounts for the percentage of the total number of randomly inspected steam traps. 3.4 The percentage of qualified condensate mass actually recovered to the condensate mass that can be recovered. Note. The calculation period is generally one year. ......

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