GB/T 29464-2023Steam-driven jet heat exchanger (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 29464-2012 "Two-phase flow jet heat exchanger". Compared with GB/T 29464-2012, except for structural adjustment In addition to rectification and editorial changes, the main technical changes are as follows:

a) Changed the definition of two-phase jet heat exchanger (see 3.1.1, 3.1 of the 2012 edition);

b) Change "loss of boosting ability" in the term definition to "unable to work stably" (see 3.1.3, 3.1.4, 3.1.8, 2012 edition 3.4, 3.9);

c) The maximum heating temperature rise, maximum inlet steam pressure, minimum water inlet pressure, maximum water inlet pressure, ejector heat transfer, and resistance coefficient have been added Terms and definitions (see 3.1.5, 3.1.9, 3.1.10, 3.1.11, 3.1.13, 3.1.18);

d) The structure description of the two-phase jet heat exchanger has been changed (see 4.3.1, 4.3.2, 4.4, 4.3.1, 4.3.2, 4.4 of the 2012 edition);

e) Some symbols and calculation formulas have been changed (see 3.2, 6.2, 6.3, 6.4, 6.1, 6.2, 6.3, 6.4 of the 2012 edition);

f) Added design description, performance check, system design, and operating parameters (see 6.1, 6.6, 6.7, 6.8);

g) Added the content of limit performance test (see 8.5.5).

1 Scope

This document specifies the materials, design, manufacture, inspection, acceptance and installation and use of two-phase flow ejector heat exchangers (hereinafter referred to as ejectors). Require.

This document is applicable to the fields of energy and power, petrochemical industry, refrigeration and air conditioning, central heating, domestic and production process hot water, etc.

Steam is the heat source, and the injector realizes heat exchange through the mixing of gas and liquid.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 150.1 Pressure Vessels Part 1: General Requirements

GB/T 150.4 Pressure Vessels Part 4: Manufacture, Inspection and Acceptance

GB/T 191 Packaging, storage and transportation icon marks

GB/T 699 High Quality Carbon Structural Steel

GB/T 700 carbon structural steel

GB/T 983 stainless steel welding rod

GB/T 1226 General pressure gauge

GB/T 3768 Acoustic sound pressure method Determination of sound power level and sound energy level of noise source using the simple method of enveloping the measuring surface above the reflecting surface

GB/T 3985 Asbestos rubber sheet

GB/T 4622 (all parts) spiral wound gaskets for pipe flanges

GB/T 5117 Non-alloy steel and fine grain steel welding rod

GB/T 5118 heat-strength steel welding rod

GB/T 5231 Processed copper and copper alloy grades and chemical composition

GB/T 5574 Industrial rubber sheet

GB/T 8163 seamless steel pipe for conveying fluid

GB/T 12232 General Valve Flange Connection Iron Gate Valve

GB/T 12233 General valve iron globe valve and lift check valve

GB/T 12238 Flange and Wafer Connection Elastic Seal Butterfly Valve

GB/T 13296 Boiler and Heat Exchanger Stainless Steel Seamless Tubes

GB/T 13384 General Technical Specifications for Packaging of Mechanical and Electrical Products

GB/T 14976 Stainless Steel Seamless Steel Tubes for Fluid Transmission

GB/T 19066 (all parts) metal corrugated composite gaskets for pipe flanges

JB/T 8803 bimetallic thermometer

NB/T 47008 Carbon steel and alloy steel forgings for pressure equipment

NB/T 47010 Stainless steel and heat-resistant steel forgings for pressure equipment