GB/T 28712.5-2023Types and basic parameters of heat exchangers—Part 5: Spiral 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 5 of GB/T 28712 "Heat exchanger types and basic parameters". GB/T 28712 has released the following part.

---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 28712.5-2012 "Heat exchanger types and basic parameters - Part 5: Spiral plate heat exchangers" and is consistent with Compared with GB/T 28712.5-2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

---The applicable nominal pressure of the non-detachable spiral plate heat exchanger is changed from no more than 2.5MPa to no more than 3.0MPa; the maximum nominal pressure The nominal diameter is increased from 2000mm to 2500mm; the maximum nominal heat exchange area is changed from 200m² to 350m² (see section Chapter 1, Chapter 1 of the 2012 edition);

---The applicable nominal pressure of the detachable spiral plate heat exchanger is changed from no more than 1.0MPa to no more than 3.0MPa; the maximum nominal pressure The diameter is increased from 1200mm to 2500mm; the maximum nominal heat exchange area is changed from 90m² to 350m² (see Chapter 1, Chapter 1 of the 2012 edition);

---Deleted the basic parameter combinations with lower energy efficiency levels in Table 1, Table 2, Table 4 and Table 5 (see 5.4 of the 2012 version);

---Added table 3 (2.5MPa < PN <= 3.0MPa) basic parameter set of carbon steel and low alloy steel spiral plate heat exchangers Together, Table 6 (2.5MPa < PN <= 3.0MPa) basic parameter combination of austenitic stainless steel spiral plate heat exchanger (see 6.4);

---Increased the structural dimensions of PN1.6MPa inverted cone flat cover (see 7.2).

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.

Based on current product standards and industry common needs, this document focuses on expanding the applicable scope of spiral plate heat exchanger types and parameters, providing The corresponding matching dimensions have been introduced, and the basic parameters of some low-energy-efficiency products have been deleted to comply with the development requirements of large-scale equipment and energy-saving in various fields. requirements to meet the urgent needs of industrial upgrading and development; through the completeness and normative expansion of standard data, combined with the principle of energy conservation and consumption reduction, the promotion of The digitalization and green development of the industry and improving the level of standardization have a positive role in promoting.

1 Scope

This document specifies the types and basic parameters of non-detachable and detachable spiral plate heat exchangers.

This document applies to applications where the nominal pressure is not greater than 3.0MPa, the nominal diameter is not greater than 2500mm, and the nominal heat exchange area is not greater than 350m² Non-detachable and detachable spiral plate heat exchanger.

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 150.3-2011 Pressure vessel Part 3 design

NB/T 47048-2015 Spiral plate heat exchanger

3 Terms and definitions

The terms and definitions defined in NB/T 47048 apply to this document.

4 Symbols

The following symbols apply to this document.

A---Nominal heat exchange area, unit is square meter (m2);

AY---effective heat exchange area, refer to NB/T 47048-2015, unit is square meter (m2);

AT---spiral channel cross-sectional area, unit is square meter (m2); b---spiral channel spacing, unit is millimeter (mm);

Do---the outer diameter of the inverted cone flat cover of the detachable spiral plate heat exchanger, in millimeters (mm);

DN---Nominal diameter, based on the outer diameter of the spiral body, in millimeters (mm); d---Helix center diameter, unit is millimeter (mm); dn---Nominal diameter of nozzle, unit is millimeter (mm);

H---Helix plate width, unit is meter (m); h---The height of the inverted cone flat cover circular ring rib, in millimeters (mm); h1---The welding height of the inner and outer cones, in millimeters (mm); k---the positioning size coefficient of the inverted cone flat cover circular ring bar;

Lt---The length of the spiral channel, in meters (m); l---The positioning size coefficient of the inner and outer cones of the inverted cone flat cover; PN---Nominal pressure, unit is MPa;

Rc---The calculated radius of the detachable spiral plate heat exchanger, in millimeters (mm);