GB/T 14650-2025General specification for marine auxiliary boiler (English PDF)

Foreword

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);

1 Scope

This document specifies the classification, basic parameters, requirements, inspection rules, marking, packaging, accompanied documents, transportation and storage for marine auxiliary boilers (hereinafter referred to as "boilers"), and describes the corresponding test methods.

This document applies to the design, manufacturing, and acceptance testing of natural circulation steam boilers with design pressure not exceeding 2.5 MPa and water as working medium, as well as hot water boilers with water as the medium and an outlet temperature not exceeding 120°C.

2 Normative References

The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, subsequent amendments (excluding corrigenda) or revisions to these documents do not apply. For undated references, the latest version of the document (including all amendments) applies.

GB/T 699-2015 Quality carbon structural steels

GB/T 713.2-2023 Steel plates and strips for pressure equipment - Part 2: Alloyed steels with defined elevated temperature properties

GB/T 3087-2022 Seamless steel tubes for low and medium pressure boilers

GB/T 5312-2009 Seamless steel tubes of carbon and carbon-manganese qualities for shipbuilding

GB/T 11037 Test methods for strength and tightness of marine boilers and pressure vessels

GB/T 11038 Technical requirements for welding of pressure components of marine auxiliary boilers and pressure vessels

GB 13271-2014 Emission standard of air pollutants for boilers GB/T 13306 Plates

GB/T 14649 Test method for marine auxiliary boiler property

GB/T 24947 Water quality requirements for marine auxiliary boilers CB/T 3111 Marine auxiliary boiler - Low-lift safety valve CB/T 3752 Marine mechanical pressure type burner CB/T 3766 Steel flanges for exhaust pipes CB/T 3920 Marine auxiliary boiler - Finned tube CB/T 3921 Marine auxiliary boiler - Manhole device CB/T 3922 Manufacturing requirements for marine auxiliary boiler pressure components CB/T 3923 Marine auxiliary boiler - Handhole device CB/T 3967 Marine steam atomizing type burner

3 Terms and Definitions

The terms and definitions established in CB/T 3568.3, as well as the following, apply to this document.

7 Inspection Rules

8 Marking, Packaging, Accompanied Documents, Transportation and Storage

General Specification for Marine Auxiliary Boiler