Industrial wire woven square hole screen (GB/T5330-2003) standard

GBT 5330-2003_Industrial woven metal wire cloth (square opening series).
Implementation date: 2004-06-01. Replacement: GB/T 5330-85 (1985).

1 Scope
This standard specifies the weaving type, model, specification, marking, technical conditions, test methods, inspection rules and markings of industrial metal wire woven mesh for screening and filtering. This standard applies to metal wire
woven square hole screens for solid particle screening, liquid and gaseous material filtration and other industrial purposes. This standard
applies to industrial metal wire woven square hole screens with a basic mesh size of 0.02 to 16.0 mm.
2 Normative references The clauses in the following documents become the clauses of this standard through reference to the standard.
For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. The latest version of any undated referenced document shall apply to this standard. GB/T 699 High-quality carbon structural steel GB/T 4239 Cold-rolled stainless steel and heat-resistant steel strip GB/T 5231 Chemical composition and product shape of processed copper and copper alloy GB/T 10611 Industrial screen mesh size series
3 Weaving type, model and specification
3.1 Weaving type Industrial metal wire woven square hole mesh is plain weave (see Figure 1) and twill weave (see Figure 2).
3.3 Specifications are expressed in terms of basic mesh size and wire diameter (see Table 1).
3.4 The marking shall be indicated by model, specification, weaving type and the number of this standard. Example: The industrial metal wire plain weave square hole screen with a basic mesh size of 1.00 mm and a wire diameter of 0.3555 mm is marked as: GFW 1.00 /0.355 (plain weave) GB /T5330-2003, and the industrial metal wire twill weave screen is marked as: GFW0.063 /0.045 (twill) GB / T 5330 -2003
4 Technical requirements
4.1 1 The combination of the basic mesh size W, the arithmetic mean mesh size deviation, the large mesh size deviation range, and the wire diameter d shall be selected in accordance with GB/T 10611 and comply with the provisions of Table 1.
4.2 According to the special needs of the particle size of natural materials (such as grain, oil, etc.), the specifications in Table 2 may be selected.
4.3 The basic size and limit deviation of the metal wire diameter shall comply with the provisions of Table 3.
4.4 The number of large mesh holes allowed: not more than 5%. 4.5 Metal wire
4.5.1 The metal wire material shall be soft brass, tin bronze, stainless steel and carbon structural steel after heat treatment.
a) The chemical composition of brass shall comply with H62, H65, H68 and H80 in GB/T5231.
b) The chemical composition of tin bronze shall comply with QS n6.5-0.1, QS n 6.5-0.4 in GB/T5231.
c) The chemical composition of stainless steel shall comply with the austenite type in GB/T 4239.
d) The chemical composition of carbon structural steel shall comply with 10, 08F and 10F in GB/T 699. Other metal materials may 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
Metal Wire Screen
4.6.1 The wire mesh should be plain woven (see Figure 1). According to different needs, twill weave can also be used (see Figure 2). 4.6.2
The mesh surface should be flat, clean, tightly woven, and free of mechanical damage and rust. Warp joints are allowed, but they should be well woven. Table 1 Basic mesh size, mesh arithmetic mean size deviation, large mesh size deviation range and metal wire diameter matching (see original standard) Table 2 Basic mesh size supplementary size, mesh arithmetic mean size deviation, large mesh size deviation range and metal wire diameter matching (see original standard) Table 3 Metal 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 weft, serious sparse and dense channels, large cracks, serious curling of the mesh surface, mesh tilt deviation, serious mechanical damage, warp and weft interweaving firmness not meeting the requirements, etc. However, general weaving defects are allowed, such as single broken wire, weft nest, weft nose, small loose wire, small skipped wire, wrong twist, slightly uneven mesh surface, slight curling, spot oil stains, small debris woven into the mesh and slightly wavy edges. The limit requirements for general weaving defects shall comply with the provisions of Table 4. Table 4 Size and number of weaving defects Basic mesh size w/mm 16.0≥w≥1 1＞w≥0.25 0.25＞w≥0.125 0.125＞w≥0.063 w≤0.063 The number of point defects such as broken wire, weft nose, small skipped wire and small loose wire (length not exceeding 30 mm) shall not exceed (pieces/m?) 5 10 12 18 20
4.6.4 Curling of metal mesh: The metal wire screen may have part of the mesh curling phenomenon. For screens with mesh size greater than or equal to 0.18 mm, the natural curl diameter of the 1m length of the screen should be greater than 80 mm; for screens with mesh size less than 0.18 mm, the natural curl diameter of the 1m length of the screen should be greater than 60 mm.
4.6.5 Mesh tilt requirements: The non-verticality of the warp and weft of the screen in the weaving width should not be greater than 4°.
4.6.6 The interlacing points of the warp and weft wires of the metal wire mesh should be tight and firm, and no obvious looseness or displacement is allowed. For specific specifications, the requirements for the firmness of the mesh 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. Metal wire mesh with other mesh widths can also be manufactured according to needs.
4.8 Metal wire mesh should be supplied in rolls, and each roll of mesh can be composed of one section or a maximum of three sections. The mesh in the same roll must be of the same specification, the same material, and the same weaving type. The standard mesh roll length of the metal wire mesh is 25m and 30.5m. The minimum length of the minimum mesh segment in each roll of mesh 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 Segment length Basic mesh size/mm 16.0～8.50 8.00～0.630 0.600～0.100 0.095～0.040 0.038～0.025 Segment length (min/m) 2.0 2.5 2.5 2.5 1 5 Test method
5.1 The wire mesh is tested on a frosted glass inspection table with a uniform light source below. Mesh sizes larger than 1.00mm are allowed to be tested on an inspection table without a light source background.
5.2 When testing large mesh sizes, the measurement should be accurate. The precision of the measuring device should be at least 2.5μm or 1/10 of the middle deviation of the mesh size, whichever is larger.
5.3 Inspection of weaving quality: Observe with the naked eye or with a 5-25 times magnifying glass. Defects 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) For mesh size of 16.0 mm to 4.00 mm, use a steel ruler with a graduation value of 0.5 mm or a vernier caliper with a graduation value of 0.1 mm.
b) For mesh size of 3.75 mm to 2.80 mm, use 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) For mesh size of 2.65 mm to 0.071 mm, use a microscope with a graduation value of 0.01 mm to 0.05 mm and a magnification of 20 times to 40 times or a projector.
d) For mesh size of 0.063 mm to 0.02 mm, use a microscope with a graduation value of 0.01 mm to 0.05 mm and a magnification of 35 times to 100 times or a projector.
5.5 The number of large meshes of the sieve with mesh size less than 1mm is measured on the 100 mmX 100 mm mesh surface; the number of large meshes of the sieve with mesh size greater than or equal to 1mm is measured on the 200 mmX200 mm mesh surface.
5.6 Inspection of the arithmetic mean size of meshes: Three locations should be measured in the warp and weft directions at the location where the mesh size deviation is the largest, and the connecting lines between the locations shall not be parallel to the warp and weft directions. The measurement location can be selected arbitrarily, but it should be no less than 20 mm away from the edge of the mesh. Table 6 Measuring length and number of mesh holes Basic mesh size/mm 16.0～0.40 0.375～0.15 0.14～0.071 0.067～0.02 Measuring length L/mm 10 mesh holes in continuous distribution Length occupied by the spacing between 5 mm holes Measuring the number of mesh holes on a length of 5 mm Measuring the number of mesh holes on a length of 3 mm Measuring the number of mesh holes on a length of 2 mm Measuring the number of mesh holes n/piece The number of mesh holes n on the measuring length L can be measured with a steel ruler with a graduation value of 0.5 mm or a 25x reading microscope. For mesh holes smaller than 0.5 mm, an optical longitude and latitude density meter or a magnifying glass with a magnification of 5 to 25 times can be used to measure the number of holes on the fixed length mesh.
5.7 Inspection of the surface quality of metal wire: Observe with the 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. For wire diameters 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 Width and length of mesh: 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 The metal wire screen shall be submitted for inspection in rolls. If a roll contains several sections, each section must be inspected.
a) Weaving quality of metal wire mesh;
b) Arithmetic mean size of mesh holes;
c) Size and quantity of large mesh holes;
d) Diameter and material of metal wire;
e) Width, length and quantity of mesh.
7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Metal wire mesh should be accompanied by a product certificate, which should indicate:
a) Product name;
b) Metal wire mesh mark;
c) Weaving type;
d) Metal wire material;
e) Width, length, quantity and quality of mesh;
f) Inspection results;
g) Inspection date and stamp of the inspector;
h) Manufacturer's name.
7.1.2 The outer packaging should indicate:
a) Product name;
b) Metal wire mesh mark;
c) Total mass, kg;
d) Manufacturer's name;
e) Words or signs such as "Handle with care" and "Prevent moisture".
7.2 Packaging
7.2.1 The metal wire mesh should be wound on a straight and dry mandrel, and wrapped with moisture-proof paper or other packaging materials inside and outside. It can also be wound without a mandrel according to different needs.
7.2.2 The outer packaging of the metal wire mesh can be a dry box, box or other packaging material (the mass of each piece should generally not exceed 80 kg). When the user has requirements, it can also be negotiated by the supply and demand parties.
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, and should not be stored when the inner packaging is damaged. This standard is proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Sieving and Particle Inspection Method Standardization Committee.