GB/T 28712.3-2023Types and basic parameters of heat exchangers—Part 3: U-tube heat exchangers (English PDF)

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 is Part 3 of GB/T 28712 "Heat exchanger types and basic parameters". GB/T 28712 "Heat exchanger type and basic This parameter has released the following parts.

---Part 1: Floating head heat exchanger;

---Part 2: Fixed tube plate heat exchanger;

---Part 3: U-shaped tube heat exchanger;

---Part 4: Thermosiphon reboiler;

---Part 5: Spiral plate heat exchanger;

---Part 6: Air-cooled heat exchanger.

This document replaces GB/T 28712.3-2012 "Heat exchanger types and basic parameters Part 3: U-shaped tube heat exchanger" and is consistent with Compared with GB/T 28712.3-2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) The nominal diameter range of U-shaped tube heat exchangers has been increased from 1200mm to 2600mm (see 5.1);

b) The nominal pressure range of the U-shaped tube heat exchanger has been increased from 6.4MPa to 10.0MPa (see 5.1);

c) The nominal length of heat exchange tubes in the nominal diameter range of U-shaped tube heat exchangers is increased from 1300mm to 2600mm, from 6000mm Expanded to 9000mm (see 5.1);

d) Added parameters for heat exchange tubes of non-ferrous metals such as nickel, zirconium and their alloys (see 5.2);

e) Added baffle spacing parameters for the nominal diameter range of U-shaped tube heat exchangers from 1300mm to 2600mm (see 5.3).

Introduction

GB/T 28712 "Heat exchanger types and basic parameters" aims to standardize the typical structural types of heat exchangers used in the energy industry, fully considering the installation In line with the development trend of large-scale installations, taking into account the product standards and construction level of my country's heat exchangers, the applicable range of parameters and their supporting dimensions are clarified. consider The functions, structures, and parameters of different heat exchangers are obviously different, and they are composed of six parts.

---Part 1: Floating head heat exchanger.

---Part 2: Fixed tube plate heat exchanger.

---Part 3: U-shaped tube heat exchanger.

---Part 4: Thermosiphon reboiler.

---Part 5: Spiral plate heat exchanger.

---Part 6: Air-cooled heat exchanger.

Heat exchanger type and basic parameter standards are of great significance to the realization of standardization, serialization, generalization and scale of heat exchangers in my country. righteous. For large-volume and wide-ranging heat exchanger products, the standardization of their structures and parameters can first promote the standardization of product construction, improve design quality, efficiency; secondly, it can save tools, tooling, material consumption and backlog in manufacturing and use; finally, it can facilitate users to select and use products.

Replacement, repair and interchange. In recent years, the construction of large-scale refining and chemical integration projects in our country has entered a period of rapid development. As a typical energy-consuming equipment The usage of heat exchangers has increased significantly; the large-scale installation has pushed the structural size of heat exchangers to new heights, and the demand for large-scale single equipment is increasing.

Outstanding; the construction and implementation of a large number of engineering projects has accumulated rich experience in design, manufacturing and engineering application for the construction of heat exchangers.

GB/T 151 "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 Applicable parameters have been significantly adjusted. To this end, it is necessary to revise the heat exchanger type and basic parameter standards to adapt to industry and standard development. exhibition needs.

This document focuses on the large-scale development needs of U-shaped tube heat exchangers. Through the environmental protection of product design, production, use and standardization, The research and analysis of this section has greatly expanded the types and basic parameters of U-shaped tube heat exchangers, and promoted the efficient selection and construction of this type of products.

Manufacturing, maintenance and exchange are of positive significance to the implementation of my country's "energy saving and emission reduction" strategy and the promotion of "green design".

1 Scope

This document specifies the type and basic parameters of U-shaped tube heat exchangers (hereinafter referred to as "heat exchangers").

This document is applicable to U-shaped tube heat exchangers with nominal diameters ranging from 300mm to 2600mm and nominal pressures not exceeding 10.0MPa. converter.

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 151 heat exchanger

NB/T 47065.1 Vessel supports Part 1: Saddle supports

3 Terms and definitions

The terms and definitions defined in GB/T 151 apply to this document.

4 Types