GB/T21648-2008 National Standard (GB) for Metal Wire Weaving Dense Mesh Quality Standard Introduction

GB/T21648-2008 Metal Wire Weaving Dense Mesh National Standard (GB) Introduction

Metal Wire Woven Mesh

This standard adopts ISO 4783.1:1980 <<Industrial wire screens and wire meshes - Guide to the selection of mesh size and wire diameter combinations - Part 1: General>>.

1 Main content and scope of application

This standard specifies the types and sizes of metal wire woven dense mesh, technical requirements, inspection methods, acceptance rules, and marking, packaging, transportation and storage.

This standard applies to metal wire woven dense mesh for gas, liquid filtration and other media separation.

2 Reference standards

GB 5330 Industrial wire woven square hole screen

GB 8605 Industrial metal wire

GB 10611 Industrial mesh size series

3 Structural type and size

3.1 Structural type

The structure of the metal wire woven dense mesh has two types: plain weave (as shown in Figure 1) and twill weave (as shown in Figure 2).

3.1 Size

The specifications, main parameters and dimensions of the metal wire woven dense mesh shall comply with the requirements of Table 1.

Table 1

3.2 Marking

3.3.1 Model compilation method

3.3.1.1 Model compilation method of plain dutch weave mesh

MP-W-XX

M stands for Microgroove Code

P stands for plain weave code

W stands for network code

XX represents the specification code

3.3.1.1 Model compilation method for twill dense mesh

M X － W － XX

M stands for Microgroove Code

X represents the double twill weave code

W stands for network code

XX represents the specification code

3.3.2 Marking method

□ － □/□ － □ － □ □

Model Warp diameter /Weft diameter Material mesh width, m Standard number

3.3.3 Tagging Examples

Example 1: Warp diameter 0.40 mm, weft diameter 0.28 mm, mesh width 1000.0Crl8Nil9 material, plain weave wire woven dense weave mark:

NPW 80-0.40/0.28-0Crl8Nil9-1 JB/T 5979-92

Example 2: Warp diameter 0.050mm, weft diameter 0.032, mesh width 1000mm, H80 material, twill weave dense mesh mark:

MXW 789-0.050/0.032-H80-1 JB/5979-92

4 Technical requirements

4.1 Metal materials shall comply with the requirements of Table 2. Other metal materials may also be used depending on the application.

4.2 The wire diameter and roundness tolerance shall comply with the requirements of Table 1.

4.3 The weft density and its limit deviation shall comply with the requirements of Table 1.

4.4 The average mesh size deviation between the warp wires, the large mesh size deviation range and the number of radial large meshes shall comply with the requirements of Table 1.

4.5 Metal wire mesh should be supplied in rolls. Each roll can be composed of one or more sections. The same specifications and materials must be the same in the same roll. The minimum length of each section should comply with the requirements of Table 2.

Table 2

4.6 The mesh width is 800, 1000, 1250, 1600, 2000 mm. Other mesh widths can also be manufactured based on negotiation between the two parties, and the deviation should not exceed 2% of the width.

4.7 The surface of the mesh should be flat and clean, the weft threads should be closely arranged without gaps, and there should be no mechanical damage or rust spots.

4.8 The mesh weaving defects shall comply with the requirements of Table 3.

table 3

5 Test methods

5.1 Net products should be inspected on a frosted glass inspection table with a uniform light source.

5.2 The quality of the mesh surface should be observed visually or with the aid of a 5-25x microscope. Defective and scrapped parts should be clearly marked.

5.3 The measurement of warp and weft thread diameter deviation and roundness tolerance should be inspected in accordance with regulations.

5.4 The weft density shall be measured under the following conditions:

a. Within the mesh surface 10 mm from the edge:

b. Select 0.01~0.05mm;

c. Measure length;

For MPW 28~120, the measuring length is 5mm;

For MPW 140~180, the measuring length is 8mm;

For MPW 200~MXW 600, the measuring length is 2mm;

For MXW 630~1250, the measuring length is 1mm.

5.5 The arithmetic mean size of the wire mesh holes and the maximum mesh size should be measured using a 0.01~0.05mm measuring tool and measured at the mesh end.

5.6 The number of large mesh sizes is measured on a 200mm×200mm mesh.

5.7 The web width and web segment length shall be measured using a measuring tool with a graduation value of not less than 1 mm.

6 Inspection Rules

6.1 Products must be inspected by the manufacturer’s technical inspection department and issued a certificate of conformity before leaving the factory.

6.2 Products should be submitted for inspection in rolls. If a roll contains several segments, each segment must be inspected.

6.3 Inspection items include:

a. Weaving type;

b. Warp wire diameter and mesh size between radial wires;

c. Weft diameter and weft density;

d. Net quality;

e. Network width, network length and quantity;

7. Marking, packaging, transportation and storage

7.1 Logo

7.1.1 The finished product should be accompanied by a product certificate, which should include:

a. Product name and mark;

b. quantity;

c. Date of manufacture;

d. Stamp of the quality inspection department;

e. Manufacturer's name and trademark;

7.1.2 Each outer packaging should be marked with:

a. Product name and mark;

b. Manufacturer's name;

c. Net weight and gross weight;

d. Date of manufacture;

e. Pictorial signs for packaging, storage and transportation.

7.2 Packaging

7.2.1 The inner packaging of the finished product should be made of moisture-proof paper and other materials that do not affect the surface quality of the net product, which can also be determined by negotiation between the purchaser and the buyer.

7.2.2 The outer packaging of the finished product must be accompanied by product certificates and other accompanying documents.

7.3 Transportation and storage

7.3.1 Rain and moisture protection measures should be taken during transportation.

7.3.2 It should be stored in a dry and non-corrosive place.

GB/T21648-2008 Metal Wire Weaving Dense Mesh National Standard (GB) Introduction

Metal Wire Woven Mesh

This standard adopts ISO 4783.1:1980 <<Industrial wire screens and wire meshes - Guide to the selection of mesh size and wire diameter combinations - Part 1: General>>.

1 Main content and scope of application

This standard specifies the types and sizes of metal wire woven dense mesh, technical requirements, inspection methods, acceptance rules, and marking, packaging, transportation and storage.

This standard applies to metal wire woven dense mesh for gas, liquid filtration and other media separation.

2         Reference standards

GB 5330 Industrial wire woven square hole screen

GB 8605 Industrial metal wire

GB 10611 Industrial mesh size series

3 Structural type and size

3.1 Structural type

The structure of the metal wire woven dense mesh has two types: plain weave (as shown in Figure 1) and twill weave (as shown in Figure 2).

3.1 Size

The specifications, main parameters and dimensions of the metal wire woven dense mesh shall comply with the requirements of Table 1.

Table 1

3.2 Marking

3.3.1 Model compilation method

3.3.1.1 Model compilation method of plain dutch weave mesh

MP-W-XX

M stands for Microgroove Code

P stands for plain weave code

W stands for network code

XX represents the specification code

3.3.1.1 Model compilation method for twill dense mesh

M X － W － XX

M stands for Microgroove Code

X represents the double twill weave code   

W stands for network code

XX represents the specification code

3.3.2 Marking method

□ － □/□ － □ － □ □

Model Warp diameter /Weft diameter Material mesh width, m Standard number

3.3.3 Tagging Examples

Example 1: Warp diameter 0.40 mm, weft diameter 0.28 mm, mesh width 1000.0Crl8Nil9 material, plain weave wire woven dense weave mark:

NPW 80-0.40/0.28-0Crl8Nil9-1 JB/T 5979-92

Example 2: Warp diameter 0.050mm, weft diameter 0.032, mesh width 1000mm, H80 material, twill weave dense mesh mark:

MXW 789-0.050/0.032-H80-1 JB/5979-92

4 Technical requirements

4.1 Metal materials shall comply with the requirements of Table 2. Other metal materials may also be used depending on the application.

4.2 The wire diameter and roundness tolerance shall comply with the requirements of Table 1.

4.3 The weft density and its limit deviation shall comply with the requirements of Table 1.

4.4 The average mesh size deviation between the warp wires, the large mesh size deviation range and the number of radial large meshes shall comply with the requirements of Table 1.

4.5 Metal wire mesh should be supplied in rolls. Each roll can be composed of one or more sections. The same specifications and materials must be the same in the same roll. The minimum length of each section should comply with the requirements of Table 2.

Table 2

4.6 The mesh width is 800, 1000, 1250, 1600, 2000 mm. Other mesh widths can also be manufactured based on negotiation between the two parties, and the deviation should not exceed 2% of the width.

4.7 The surface of the mesh should be flat and clean, the weft threads should be closely arranged without gaps, and there should be no mechanical damage or rust spots.

4.8 The mesh weaving defects shall comply with the requirements of Table 3.

table 3

5 Test methods

5.1 Net products should be inspected on a frosted glass inspection table with a uniform light source.

5.2 The quality of the mesh surface should be observed visually or with the aid of a 5-25x microscope. Defective and scrapped parts should be clearly marked.

5.3 The measurement of warp and weft thread diameter deviation and roundness tolerance should be inspected in accordance with regulations.

5.4 The weft density shall be measured under the following conditions:

a. Within the mesh surface 10 mm from the edge:

b. Select 0.01~0.05mm;

c. Measure length;

For MPW 28~120, the measuring length is 5mm;

For MPW 140~180, the measuring length is 8mm;

For MPW 200~MXW 600, the measuring length is 2mm;

For MXW 630~1250, the measuring length is 1mm.

5.5 The arithmetic mean size of the wire mesh holes and the maximum mesh size should be measured using a 0.01~0.05mm measuring tool and measured at the mesh end.

5.6 The number of large mesh sizes is measured on a 200mm×200mm mesh.

5.7 The web width and web segment length shall be measured using a measuring tool with a graduation value of not less than 1 mm.

6 Inspection Rules

6.1 Products must be inspected by the manufacturer’s technical inspection department and issued a certificate of conformity before leaving the factory.

6.2 Products should be submitted for inspection in rolls. If a roll contains several segments, each segment must be inspected.

6.3 Inspection items include:

a. Weaving type;

b. Warp wire diameter and mesh size between radial wires;

c. Weft diameter and weft density;

d. Net quality;

e. Network width, network length and quantity;

7. Marking, packaging, transportation and storage

7.1 Logo

7.1.1 The finished product should be accompanied by a product certificate, which should include:

a. Product name and mark;

b. quantity;

c. Date of manufacture;

d. Stamp of the quality inspection department;

e. Manufacturer's name and trademark;

7.1.2 Each outer packaging should be marked with:

a. Product name and mark;

b. Manufacturer's name;

c. Net weight and gross weight;

d. Date of manufacture;

e. Pictorial signs for packaging, storage and transportation.

7.2 Packaging

7.2.1 The inner packaging of the finished product should be made of moisture-proof paper and other materials that do not affect the surface quality of the net product, which can also be determined by negotiation between the purchaser and the buyer.

7.2.2 The outer packaging of the finished product must be accompanied by product certificates and other accompanying documents.

7.3 Transportation and storage

7.3.1 Rain and moisture protection measures should be taken during transportation.

7.3.2 It should be stored in a dry and non-corrosive place.