GB/T5330-2003Industrial wire woven square hole screen
2024-07-25 13:40:57
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GB/T5330-2003Industrial wire woven square hole screen
1 Scope
This standard specifies the weaving type, model, specification, marking, technical conditions, test method, inspection rules and marking of industrial metal wire mesh used for screening and filtering.
This standard applies to metal wire woven square mesh for screening of solid particles, filtering of liquids and gases, and other industrial purposes .
This standard applies to industrial metal wire woven square hole mesh with a basic mesh size of 0.02 to 16.0 mm.
2 Normative references
The clauses in the following documents become clauses of this standard through reference in the standard. For all referenced documents with dates, all subsequent amendments (excluding errata ) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all referenced documents without dates, the latest versions are applicable to this standard.
GB/T 699 High Quality Carbon Structural Steel
GB/T 4239 Stainless steel and heat-resistant steel cold-rolled strip
GB/T 5231 Chemical composition and product shape of processed copper and copper alloys
GB/T 10611 Industrial sieve mesh size series
3 Weaving type, model and specification
3.1 Weaving type
Industrial wire woven square hole mesh is plain weave (see Figure 1) and twill weave (see Figure 2).
Specification 3.3
It is expressed by the basic mesh size and wire diameter (see Table 1).
3.4 Marking
Indicated by model, specification, weaving type and number of this standard.
Example:
Industrial wire plain weave square hole screen is marked as:
GFW 1.00 /0.355 (plain weave) GB /T5330-2003
Industrial wire twill woven screens are marked as:
GFW0.063 /0.045 (twill) GB / T 5330 -2003
4 Technical requirements
4.1 1 The mesh basic size W, mesh arithmetic mean size deviation, large mesh size deviation range, and wire diameter d should be matched according to
GB/T 10611 is selected and complies with the requirements of Table 1.
4.2 According to the special requirements of the particle size of natural materials (such as grain, oil, etc.), the specifications in Table 2 may be selected.
4.3 The basic dimensions and limit deviations of wire diameter shall comply with the requirements of Table 3.
4.4 Number of large mesh holes allowed: no more than 5%.
4.5 Metal Wire
4.5.1 The metal wire materials are heat-treated soft brass, tin bronze, stainless steel and carbon structural steel.
a) The chemical composition of brass shall conform to H62, H65, H68 and H80 in GB/T5231 .
b) The chemical composition of tin bronze shall conform to QS n6.5 – 0.1, QS n 6.5 – 0.4 in GB/T5231 .
c) The chemical composition of stainless steel should adopt the austenite type in GB/T 4239.
d) The chemical composition of carbon structural steel shall conform to 10F, 08F and 10F in GB/T 699.
Other metal materials can also be used according to different uses.
4.5.2 The surface of the metal wire should be smooth, without cracks, peeling, oxide scale, or heavy oxidation color.
4.6 Wire mesh
4.6.1 The wire mesh should be plain woven (see Figure 1). Depending on the requirements, twill woven (see Figure 2) may also be used.
4.6.2 The mesh surface should be flat, clean, tightly woven, and free from mechanical damage and rust. Warp thread joints are allowed, but they should be well woven.
Table 1. Mesh basic size, mesh arithmetic mean size deviation, large mesh size deviation range and metal wire diameter matching (see original standard)
Table 2 The combination of mesh size supplementary size, mesh arithmetic mean size deviation, large mesh size deviation range and wire diameter (see original standard)
Table 3 Wire diameter and deviation (see original standard)
4.6.3 Weaving defects: Metal wire mesh is not allowed to have serious weaving defects, such as holes, half-cut wefts, serious sparse and dense paths, large cracks, serious curling of the mesh surface, mesh tilt exceeding tolerance, serious mechanical damage, warp and weft interweaving firmness not meeting the requirements, etc. However, general weaving defects are allowed, such as single broken wires, weft nests, back noses, small loose wires, small jumpers, wrong twists, slightly uneven mesh surface, slight curling, dot-shaped oil stains, small debris woven into the mesh, and slightly wavy edges. The limit requirements for general weaving defects should comply with the provisions of Table 4.
Table 4 Size and number of weaving defects
Basic mesh size w/mm | Broken wire, back nose, small jump wire, small loose wire (length not exceeding 30 mm) The number of point defects is no more than (pieces /m²) |
16.0≥w≥1 | 5 |
1＞w≥0.25 | 10 |
0.25＞w≥0.125 | 12 |
0.125＞w≥0.063 | 18 |
w≤0.063 | 20 |
4.6.4 Curling of metal mesh: The metal wire mesh may partially curl. For meshes with a mesh size greater than or equal to 0.18 mm, the natural curling diameter of the mesh surface of 1 m in length should be greater than 80 mm; for meshes with a mesh size less than 0.18 mm, the natural curling diameter of the mesh surface of 1 m in length should be greater than 60 mm.
4.6.5 Mesh inclination requirement: The non-verticality of the warp and weft wires of the screen in the weaving width should not be greater than 4°.
4.6.6 The interweaving points of the warp and weft wires of the metal wire screen should be tight and firm, and no obvious looseness or displacement is allowed. For specific specifications, the requirements for the firmness of the screen should be implemented according to the agreement between the supply and demand parties.
4.7 The mesh width is 800mm, 1000mm, 1250mm, 1600mm and 2000mm. Other mesh widths can also be manufactured as required.
4.8 Wire mesh should be supplied in rolls. Each roll can consist of one section or a maximum of three sections. The meshes in the same roll must be of the same specification, material and weaving type.
The standard roll length of wire mesh is 25m and 30.5m. The minimum length of the minimum mesh segment in each roll should comply with the provisions of Table 5, and can also be supplied according to the mesh segment length required by the user.
Table 5 Network segment length
Basic mesh size/mm | Segment length (min/m) |
16.0～8.50 | 2.0 |
8.00～0.630 | 2.5 |
0.600～0.100 | 2.5 |
0.095～0.040 | 2.5 |
0.038～0.025 | 1 |
5 Test methods
5.1 The wire mesh is tested on a frosted glass test bench with a uniform light source below. Mesh sizes greater than 1.00 mm are allowed to be tested on a test bench without a light source background.
5.2 When inspecting large mesh sizes, the measurements should be carried out accurately. The precision of the measuring device should be at least 2.5 μm or 1/10 of the mean deviation of the mesh size, whichever is greater.
5.3 Inspection of weaving quality: Observe visually or with a 5-25x magnifying glass. Defective and scrapped parts should be clearly marked.
5.4 Inspection of large mesh size: First, find the large hole by visual inspection, and then use the corresponding instrument or measuring tool to measure the size, but the distance from the edge of the mesh should not be less than 20mm. The distance between the midpoints of the opposite sides of the mesh should be measured (see Figure 3). It is recommended to use the following corresponding measuring instruments or measuring tools for measurement.
a) The mesh size is 16.0 mm to 4.00 mm, measured with a steel ruler with a graduation value of 0.5 mm or a vernier caliper with a graduation value of 0.1 mm.
b) The mesh size is 3.75 mm to 2.80 mm, measured with a vernier caliper with a graduation value of 0.05 mm or a microscope with a graduation value of 0.05 mm and a magnification of 20 times to 40 times, or a projector.
c) The mesh size is 2.65mm to 0.071mm, measured with a microscope with a graduation value of 0.01mm to 0.05mm and a magnification of 20 times to 40 times, or with a projector.
d) The mesh size is 0.063mm ~ 0.02mm, measured with a microscope with a graduation value of 0.01mm ~ 0.05mm and a magnification of 35 times to 100 times, or with a projector.
5.5 The number of large mesh holes of a sieve with a mesh size less than 1 mm is measured on a 100 mm x 100 mm mesh surface; the number of large mesh holes of a sieve with a mesh size greater than or equal to 1 mm is measured on a 200 mm x 200 mm mesh surface.
5.6 Inspection of the arithmetic mean size of mesh: Three locations should be measured in the longitude and latitude directions at the location where the mesh size deviation is the largest. The connecting lines between the locations should not be parallel to the longitude and latitude directions. The measurement location can be selected arbitrarily, but it should be no less than 20 mm from the edge of the mesh.
Table 6 Measurement length and number of meshes
Basic mesh size/mm | Measuring length L/mm | Number of flea detection meshes n/piece |
16.0～0.40 | Length occupied by 10 mesh spacings distributed continuously | |
0.375～0.15 | Number of mesh holes on a 5 mm length side | |
0.14～0.071 | Measure the number of mesh holes on a length of 3 mm | |
0.067～0.02 | Measure the number of mesh holes on a length of 2mm |
The number of mesh holes n on the length L can be measured with a steel ruler with a graduation value of 0.5mm or a 25x reading microscope. If the mesh size is less than 0.5mm, an optical longitude and latitude density meter or a magnifying glass with a magnification of 5x to 25x can be used to measure the number of mesh holes on a fixed length.
5.7 Inspection of surface quality of metal wire: Observe with eyes.
5.8 Inspection of wire diameter: The average value of not less than 5 warp wires and 5 weft wires shall be measured respectively. Use a micrometer with a graduation value of 0.01mm or a projector with a graduation value of 0.01mm~0.05mm and a magnification of 20 times~40 times. If the wire diameter is less than 0.140mm, use a micrometer with a graduation value of 0.001mm~0.005mm or a projector with a graduation value of 0.001mm~0.005mm and a magnification of 35 times~100 times.
5.9 Net width and length: Measure with a ruler with a graduation value of 1mm.
6 Inspection rules
6.1 The metal wire screen shall be inspected by the technical inspection department of the manufacturer in accordance with Chapter 4 and Chapter 5 of this standard.
6.2 Metal wire screens should be submitted for inspection in rolls. If a roll contains several sections, each section must be inspected.
a) Wire mesh weaving quality;
b) the arithmetic mean mesh size;
e) Large mesh size and quantity;
d) wire diameter and material;
e) Network width, network length and quantity.
7 Marking, packaging, transportation and storage
7.1 Logo
7.1.1 The metal wire screen should be accompanied by a product certificate, which should indicate:
a) Product name;
b) wire mesh marking;
c) weaving pattern;
d) wire material;
e) Network width, network length, quantity and quality;
f) test results;
g) Inspection date and seal of the inspector;
h) Name of manufacturer.
7.1.2 The outer packaging should indicate:
a) Product name;
b) wire mesh marking;
c) total mass, kg;
d) Name of manufacturer;
e) Words or signs such as “Handle with care” and “Prevent moisture”.
7.2 Packaging
7.2.1 The wire screen should be wound on a straight and dry core shaft and wrapped inside and outside with moisture-proof paper or other packaging materials. It can also be wound without a core shaft according to different needs.
7.2.2 The outer packaging of the metal wire mesh can be dry boxes, boxes or other packaging materials (the weight of each piece should generally not exceed 80 kg).
When required, it can also be negotiated between the supply and demand parties.
7.3 Transportation and storage
7.3.1 Measures should be taken to prevent rain and moisture during transportation.
7.3.2 It should be stored in a dry and non-corrosive place and must not be stored when the inner packaging is damaged.
This standard was proposed by the China Machinery Industry Federation.
This standard is under the jurisdiction of the National Committee for Standardization of Screening and Particle Testing Methods.
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