GB/T 29465-2023 English PDF (GBT29465-2023)

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GB/T 29465-2023: Flange of floating heat exchangers
GB/T 29465-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 23.040.60
CCS G 91
Replacing GB/T 29465-2012
Flange of Floating Heat Exchangers
ISSUED ON: SEPTEMBER 7, 2023
IMPLEMENTED ON: SEPTEMBER 7, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 6
4 Symbols... 7
5 Structural Type ... 7
6 Codes and Markings... 9
7 Selection Provisions ... 10
8 Basic Parameters ... 11
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document replaced GB/T 29465-2012 Shell Flange-Rear Head End of Floating Heat
Exchangers. Compared with GB/T 29465-2012, the major technical changes of this Document
area as follows besides the structural adjustments and editorial modifications:
a) Add the shell cover flange (see Clause 1 of this Edition);
b) Change the flange diameter specification of PN0.6MPa~2.5MPa; and increase to DN2600
(see Table 4 of this Edition; Table 3 of the 2012 Edition);
c) Change the flange diameter specification of PN4.0MPa; and increase to DN2000 (see
Table 4 of this Edition; Table 3 of the 2012 Edition);
d) Change the flange diameter specification of PN6.4MPa; and increase to DN1200 (see
Table 4 of this Edition; Table 3 of the 2012 Edition);
e) Add the basic parameters of the shell flange-rear head end of the series with the inner
diameter of the shell cover flange larger than the inner diameter of the shell flange-rear
head end by 150mm, 200mm and 250mm (see Table 4 of this Edition);
f) Add the structural type and basic parameters of the shell cover flange of the series with
the inner diameter of the shell cover flange larger than the inner diameter of the shell
flange-rear head end by 150mm, 200mm and 250mm (see 4.2 and Table 5 of this Edition).
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by and shall be under the jurisdiction of National Technical
Committee on Boilers and Pressure Vessels of Standardization Administration of China
(SAC/TC 262).
Drafting organizations of this Document: Shanghai Lanbin petrochemical Equipment Co., Ltd.;
Sinopec Engineering Incorporation; Sinopec Guangzhou Engineering Co., Ltd.; Shenyang
Institute of Special Equipment Inspection and Research; Sinopec Ningbo Engineering Co., Ltd.;
Lanzhou LS Heavy Equipment Co., Ltd.; Sinopec Nanjing Engineering Co., Ltd.; China Special
Equipment Inspection and Research Institute; Lanpec Technologies Limited; and Shanghai
Blue Ocean Science-Innovation Testing Co., Ltd.
Chief drafting staffs of this Document: Yu Xiao, Zhang Yingkai, Li Shuangquan, Luan Bo,
Zhao Leijiang, Li Yonghong, Zhu Juanjuan, Hao Yuanchuan, Zhao Sha, Yang Leijie, Chen
Zhiwei, Gu Yuezhang, Zhang Yanfeng, Liu Fulv, and Chen Zhanyang.
Introduction
GB/T 29465 Flanges of Floating Heat Exchangers aims to standardize the types and basic
parameters of flange of floating heat exchanger for the energy industry; fully considering the
development trend of large-scale devices; taking into account the flange standards and
construction levels of heat exchangers in China; and clarifying the applicable scope of
parameters and their supporting dimensions.
This Document is of great significance to the realization of standardization, serialization,
generalization and scale of flange of floating heat exchangers in China. For the standardization
of flange types and basic parameters of large-volume and wide-ranging flange of floating heat
exchangers, it can firstly promote product manufacturing standardization and improve design
quality and efficiency; secondly, it can save tools, tooling, material consumption and backlog
in manufacturing and use; finally, it is convenient for users to select, replace, repair and
interchange products. In recent years, the construction of large-scale refining and chemical
integration projects in China has entered a period of rapid development. The use of floating-
heat exchangers, which are typical energy-consuming equipment of the installation, has
increased significantly. The large-scale installation has pushed the structural size of the heat
exchanger to a new height, and the large-scale demand for single equipment has become
increasingly prominent. The construction and implementation of a large number of engineering
projects have accumulated rich experience in the design, manufacturing and engineering
application of flanges of floating heat exchangers. At the same time, GB/T151 Heat Exchanger
has also been revised accordingly, forming for the first time a comprehensive product standard
that comprehensively covers the typical structure of heat exchangers; and the applicable
parameters have been significantly adjusted. For this reason, the flange of the floating heat
exchanger needs to be revised to adapt to the development needs of the industry and standards.
This Document focuses on the large-scale development needs of flange of floating heat
exchangers. Through research and analysis of product design, production, use and
standardization, the types and basic parameters of flange of floating heat exchangers are greatly
expanded. It promotes the efficient selection, construction, maintenance and exchange of such
products; and has positive significance for implementing China's "energy saving and emission
reduction" strategy and promoting "green design".
Flange of Floating Heat Exchangers
1 Scope
This Document specifies the type, code and basic parameters of the shell flange-rear head end
and shell cover flange of floating heat exchangers.
This Document is applicable to carbon steel and low alloy steel flanges with a nominal pressure
of 0.6 MPa~6.4 MPa, an operating temperature of -40 ℃~450 ℃, and a corrosion margin of
no more than 3mm.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 151 Heat exchanger
GB/T 29463 (all parts) Gaskets used in tube-shell heat exchangers
NB/T 47020-2012 Type and Specification for Pressure Vessel Flanges
NB/T 47023-2012 Welding neck flange
NB/T 47024 Nonmetallic gaskets
NB/T 47025 Spiral wound gaskets
NB/T 47026 Double-jacketed gaskets
NB/T 47027 Stud bolts and nuts for body flange
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 151 apply.