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GB/T 14650-2025: General specification for marine auxiliary boiler
Status: Valid GB/T 14650: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 14650-2025 | English | 279 |
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3 days [Need to translate]
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General specification for marine auxiliary boiler
| Valid |
GB/T 14650-2025
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| GB/T 14650-2005 | English | 239 |
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General specification for marine auxiliary boiler
| Valid |
GB/T 14650-2005
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| GB/T 14650-1993 | English | 239 |
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General specification for marine auxiliary boiler
| Obsolete |
GB/T 14650-1993
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Basic data | Standard ID | GB/T 14650-2025 (GB/T14650-2025) | | Description (Translated English) | General specification for marine auxiliary boiler | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | U41 | | Classification of International Standard | 47.020.20 | | Word Count Estimation | 14,135 | | Date of Issue | 2025-08-29 | | Date of Implementation | 2026-03-01 | | Older Standard (superseded by this standard) | GB/T 14650-2005 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 14650-2025: General specification for marine auxiliary boiler---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/GBT14650-2025
ICS 47.020.20
CCSU41
National Standard of the People's Republic of China
Replaces GB/T 14650-2005
General technical requirements for marine auxiliary boilers
Released on August 29, 2025
Implementation on March 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 14650-2005 "General Technical Specifications for Marine Auxiliary Boilers". Compared with GB/T 14650-2005, this document
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The scope of application of the standard has been changed (see Chapter 1, Chapter 1 of the.2005 edition);
b) Added “Terms and Definitions” (see Chapter 3);
c) The classification by medium has been changed and the classification by circulation mode has been deleted (see Chapter 4, Chapter 4 of the.2005 edition);
d) The basic parameters table of auxiliary boilers has been modified (see Table 1, Table 1 of the.2005 edition);
e) Added auxiliary boiler composition requirements (see 5.1.1);
f) Added environmental conditions such as ambient temperature and relative humidity (see 5.1.2.1);
g) Added the strength calculation requirements for auxiliary boilers (see 5.1.2.2);
h) The requirements for selecting the nominal diameters of auxiliary boiler heads and tube sheets have been deleted (see 4.2.1.5 of the.2005 edition);
i) Added feed water and boiler water quality requirements for auxiliary boilers (see 5.1.2.5);
j) The minimum boiler water level requirement has been changed (see 5.1.2.6, 4.2.1.4 of the.2005 edition);
k) Changed the external wall temperature requirement for auxiliary boilers in continuous operation (see 5.1.3.8, 4.2.1.12 of the.2005 edition);
l) Added safety protection and alarm requirements for auxiliary boilers (see 5.1.7.6);
m) Added the selection requirements for auxiliary boiler flue gas inlet and outlet flanges (see 5.1.8.3);
n) Added material requirements for main pressure components of auxiliary boilers (see 5.2);
o) The requirements for butt welds of auxiliary boiler T-joints have been modified (see 5.3.1, 4.2.1.6 of the.2005 edition);
p) The thermal efficiency requirements for boilers have been changed (see 5.4.4, 4.1.2 and 4.1.3 of the.2005 edition);
q) Added "Inspection Rules" (see Chapter 7);
r) Added transportation requirements for auxiliary boilers (see 8.4).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed and coordinated by the National Technical Committee for Standardization of Marine Machinery (SAC/TC137).
This document was drafted by. China Shipbuilding Industry Corporation Comprehensive Technology and Economic Research Institute, Qingdao Marine Boiler Factory Co., Ltd., Yueyang Yuan
Da Thermal Energy Equipment Co., Ltd., Nantong Ocean Shipping Equipment Co., Ltd., Hitemaster (Nantong) Boiler Co., Ltd., Qingdao Kaineng Environmental Protection Technology Co., Ltd.
Technology Co., Ltd., Zhangjiagang Hailu Shazhou Technology Co., Ltd.
The main drafters of this document are. Wei Huaxing, Guan Yuling, Chen Weiyu, Liu Sheng, Lu Weidong, Xiao Bin, Ran Hongbo, Xu Suhua, Zhang Lingang, Song Huanhuan,
Ji Yan, Li Jing, Ji Jing, Wang Bo, Fang Guodong, Wang Qi, Kang Minghong, Xiao Guangxing, Huang Liping, and Wang Jinyang.
This document was first issued in.1993, revised for the first time in.2005, and this is the second revision.
General technical requirements for marine auxiliary boilers
1 Scope
This document specifies the classification and basic parameters, requirements, inspection rules, marking, packaging, random documentation of marine auxiliary boilers (hereinafter referred to as boilers).
The relevant test methods are described.
This document is applicable to natural circulation steam boilers with a design pressure not exceeding 2.5 MPa and a working medium of water, as well as natural circulation steam boilers with a working medium of water and an outlet pressure of
Design, manufacture and acceptance of hot water boilers with a temperature not exceeding 120°C.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 699-2015 High-quality carbon structural steel
GB/T 713.2-2023 Steel plates and strip for pressure equipment Part 2.Non-alloy steels and alloy steels with specified temperature properties
GB/T 3087-2022 Seamless steel tubes for low and medium pressure boilers
GB/T 5312-2009 Carbon steel and carbon manganese steel seamless steel tubes for ships
GB/T 11037 Test methods for strength and tightness of marine boilers and pressure vessels
GB/T 11038 Technical specifications for welding of pressure components of marine auxiliary boilers and pressure vessels
GB 13271-2014 Boiler Air Pollutant Emission Standard
GB/T 13306 Signage
GB/T 14649 Performance test method for marine auxiliary boilers
GB/T 24947 Water quality requirements for marine auxiliary boilers
GB/T 31117 Safety Technical Requirements for Marine Auxiliary Boilers
GB/T 34426.1 Marine boilers and pressure vessels Part 1.Performance requirements
GB/T 34427-2017 Economic Operation of Marine Oil-fired Boilers
CB/T 3111 Marine Auxiliary Boiler Micro-Opening Safety Valve
CB/T 3347 Technical requirements for paint, insulation and packaging of marine auxiliary boilers
CB/T 3348 Technical requirements for the assembly of shell-type auxiliary boilers for ships
CB/T 3568.3 Marine Machinery Terminology Main and Auxiliary Boilers
CB/T 3596 Marine auxiliary boiler membrane water wall
CB/T 3597 Marine Auxiliary Boiler Header
CB/T 3752 Marine Mechanical Pressure Burners
CB/T 3766 Exhaust pipe steel flange
CB/T 3920 Marine auxiliary boiler threaded pipe
CB/T 3921 Manhole device for auxiliary boilers on board ships
CB/T 3922 Manufacturing requirements for pressure components of marine auxiliary boilers
CB/T 3923 Handhole device for auxiliary boilers on ships
CB/T 3967 Marine Steam Atomizing Burners
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