GB/T 21648-2023Industrial dense woven wire cloth (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 replaces GB/T 21648-2008 "Metal Wire Braided Densified Mesh". Compared with GB/T 21648-2008, except for structural adjustments and In addition to editorial changes, the main technical changes are as follows.

a) The symbol of net weight per unit area is changed from rhoA to sigma (see 3.8, 3.9 of the 2008 edition);

b) Deleted MPW395/23, MPW255/36, MPW305/38, MPW315/40, MPW275/30, MPW240/51, etc. There are 17 specifications in total, 1 specification of MPW200/48 has been added, and the average size deviation of the mesh between warp wires and the large mesh size have been changed. Deviation range, average number of bright spots (see Table 1, 2008 version of Table 1);

c) Deleted MXW1430/4, MXW1280/4II, MXW1180/6, MXW685/11, MXW685/13, MXW650/14, MXW590/15, MXW80/101 and MXW80/118 have a total of 9 specifications, and a total of MXW790/5 has been added. Changed the large mesh size deviation range and the average number of bright spots (see Table 2, Table 2 of the 2008 version);

d) Deleted MBW1280/10, MBW790/13, MBW650/19-T, MBW790/20, MBW790/20-T, MBW650/21-T, MBW790/22-T, MBW650/25I-T, MBW650/25II-T, MBW475/29-T and MBW475/35-T, a total of 11 specifications. Changed the large mesh size deviation range and average number of bright spots (see Table 3, Table 3 of the 2008 version);

e) Changed the "Mesh Defect Marking" in Figure 5 (see 6.2, 6.2 of the 2008 edition);

f) Deleted MPW395/23, MPW255/36, MPW305/38, MPW315/40, MPW275/30, MPW240/51, etc. 17 specifications, MPW200/48 added, 1 specification in total, network thickness changed (see Table A.1, Table A.1 of the 2008 version);

g) Deleted MXW1430/4, MXW1280/4II, MXW1180/6, MXW685/11, MXW685/13, MXW650/14, MXW590/15, MXW80/101 and MXW80/118, with a total of 9 specifications. MXW790/5 has been added, with a total of 1 specification. grid, changed the network thickness (see Table A.2, Table A.2 of the 2008 version);

h) Deleted MBW1280/10, MBW790/13, MBW650/19-T, MBW790/20, MBW790/20-T, MBW650/21-T, MBW790/22-T, MBW650/25I-T, MBW650/25II-T, MBW475/29-T and MBW475/35-T, a total of 11 specifications. The nominal aperture size, absolute aperture, effective section ratio, and mesh thickness have been changed (see Table A.3, Table A.3 of the 2008 version).

This document is proposed and coordinated by the National Technical Committee on Particle Characterization and Sorting and Screen Standardization (SAC/TC168).

1 Scope

This document specifies the structural types, models, specifications, technical requirements, inspection methods, inspection rules, and standards for industrial metal wire woven dense mesh. Logging, packaging, transportation and storage.

This document is applicable to the forward weaving of metal wires with nominal pore diameters of 3µm~347µm and used for gas, liquid filtration and other media separation. Weave dense mesh (hereinafter referred to as dense mesh).

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 15602 Industrial sieving and screening terminology

GB/T 17492 Technical requirements and inspection of industrial metal wire mesh

JB/T 7860 Metal wire for industrial mesh

3 Terms and definitions

The terms and definitions defined in GB/T 15602 and the following apply to this document.