GB/T 28712.6-2023Types and basic parameters of heat exchangers—Part 6: Air cooled heat exchanger (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 6 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 28712.6-2012 "Heat exchanger types and basic parameters - Part 6: Air-cooled heat exchangers" and is consistent with Compared with GB/T 28712.6-2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Added the basic parameters and arrangement pattern of finned tubes with a base tube outer diameter of 32mm (see 5.1.1);

b) Added the basic parameters and arrangement pattern of finned tubes with a base tube outer diameter of 38mm (see 5.1.1);

c) The finning ratio and the windward area ratio of the tube bundle for finned tubes with a base tube outer diameter of 32mm are increased (see 5.1.2.2);

d) Increased the fin ratio and the windward area ratio of the tube bundle for finned tubes with a base tube outer diameter of 38mm (see 5.1.2.3);

e) The outer surface area of the base tube and the number of heat exchange tubes of the tube bundle with an outer diameter of 32mm are increased (see 5.2.3.2);

f) The outer surface area of the base tube and the number of heat exchange tubes of the tube bundle with an outer diameter of 38mm are increased (see 5.2.3.2);

g) Added 6 specifications of architecture models (see 5.3);

h) Removed the restriction on the number of management processes (see 5.8 of the 2012 edition);

i) Deleted the dimensional drawing of the bolt hole locations of the frame bottom plate (see 6.1.4 of the 2012 edition);

j) Added the wind pressure value corresponding to the air volume in the fan parameter table (see 5.4);

k) The blade type in the basic combination parameters of the wind turbine has been deleted (see 7.4 of the 2012 edition).

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 needs for large-scale equipment and high-efficiency and energy-saving development. Through product design, production, use and standardization, etc.

The research and analysis has greatly expanded the types and basic parameters of fin tubes, tube bundles, frames, fans, louvers and other components in air-cooled heat exchangers. number. It promotes the efficient selection, construction, maintenance and exchange of such products, and is of great significance to the implementation of my country's "energy saving and emission reduction" strategy and the promotion of "green design". Positive meaning.

1 Scope

This document stipulates the types and fin tubes, tube bundles, frames, air-cooled heat exchangers (hereinafter referred to as "air coolers") of blast type and induced draft type. Types and basic parameters of machines, blinds and other components.

This document applies to air coolers used in the petroleum and chemical industries and similar air coolers in other industrial sectors.

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.

NB/T 47007 Air-cooled heat exchanger

3 Terms and definitions

The terms and definitions defined in NB/T 47007 and below apply to this document.

4 Types