This standard specifies the type, size, technical requirements, inspection methods, acceptance rules and marking, packaging, transportation and storage of pre-bent metal wire woven square hole mesh for industrial use with a basic mesh size of 2 to 125 mm. This standard is applicable to the screening of particles, and also to pre-bent metal wire woven square hole mesh for other purposes such as skeleton, support and protection. GB/T 13307-1991 Pre-bent metal wire woven square hole mesh GB/T13307-1991 Standard download decompression password: www.bzxz.net
This standard specifies the type, size, technical requirements, inspection methods, acceptance rules and marking, packaging, transportation and storage of pre-bent metal wire woven square hole mesh for industrial use with a basic mesh size of 2 to 125 mm. This standard is applicable to the screening of particles, and also to pre-bent metal wire woven square hole mesh for other purposes such as skeleton, support and protection.

National Standard of the People's Republic of China
Pre-bent metal wire woven square hole mesh
Industrial pre-crimped wire screens (square opening series)
GB/T 13307-91www.bzxz.net
This standard adopts 1S0 47833-1981 "Industrial metal wire screens and wire woven meshes - Guide for selection of mesh size and wire diameter combination - Part 3: Preferred combination of pre-bent or pressure welded wire mesh" Subject content and scope of application
This standard specifies the type, size, technical requirements, inspection methods, acceptance rules and marking, packaging, transportation and storage of industrial pre-bent metal wire woven square hole mesh with a basic mesh size of 2 to 125 mm. This standard is applicable to the screening of particles, and also to pre-bent metal wire woven square hole mesh (hereinafter referred to as pre-bent mesh) for other purposes such as skeleton, support and protection.
2 Reference standards
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) GB 2828
GB 8605
Metal wire for industrial mesh
3 Structural type, model and size
3.1 Structural type
Pre-bent mesh is made by pre-forming metal wire into a quilt shape, and then the warp and weft wires are regularly interwoven. Its types are divided into five types (see Table 1).
3.2 Size
The specifications of pre-bent mesh, the basic size of the mesh and the diameter of the metal wire should comply with the provisions of Table 2. National Technical Supervision and Administration Commission of the People's Republic of China on December 14, 1991, approved on October 1, 1992
Structural type code
GB/T 13307—91
Two-way bending
Wire braided mesh
One-way spacer bending
Wire braided mesh
Two-way spacer bending
Wire braided mesh
Tight (positioning>bend
Golden run wire braided mesh
Flat top bending
Golden original wire braided mesh
Main dimensions
R10 series
Basic mesh size
Supplementary dimensions| |tt||R20 case
R40/8 series
GB/T13307--91
Mesh arithmetic mean
Size deviation
Large mesh size
Deviation range
Wire diameter
Basic size
Associated area percentage
Main size
R10 series
Basic mesh size
Supplementary size
R20 Series
R40/3 Series
GB/T 13307--91
Continued Table 2
Mesh Arithmetic Mean
Size Deviation
Large Mesh Size
Deviation Range
Wire Diameter
Basic Size
Screening Area Percentage
Main Size
R1) Series
Basic Mesh Size
Supplementary Size
R20 Series
R40/3 Series
GB/T13307-- 91
Continued Table 2
Mesh Arithmetic Mean
Size Deviation
Large Mesh Size
Deviation Range
Wire Diameter
Basic Size
Screening Area Percentage
Main Size
R10 Series
Basic Mesh Size
Supplementary Size
R20 Series
R40/3 Series
GB/T 13307: 91
Continued Table 2
Mesh Arithmetic Mean
Size Deviation
Large Mesh Size
Deviation Range
21-~35
Wire Diameter
Basic Size
Screening Surface Percentage
Main Size
R10 Series
Basic Mesh Sizet
Supplementary Size
R20 Series
R40/3 Series
GB/T 1330791
Continued Table 2
Mesh arithmetic mean
Size deviation
Large mesh size
Deviation range
Wire diameter
Basic size
Sieve olefin area first fraction
Main size
R10 series
Mesh basic size
Supplementary size small
R20 series
R40/3 series
GB/T13307—91
Continued Table 2
Mesh arithmetic mean
Size deviation
Large mesh size
Deviation range
21~-35
Wire diameter
Basic size
Note: R10 series is preferred for basic mesh size, and R20 series is preferred. If necessary, R40/3 series can also be selected. 3.3 Product marking
3.3.1 Product series code
Weaving mesh (rigid)
Hole (square)
—Pre-bending (pre-forming)
3.3.2 Marking method
Screening area percentage
3.3.3 Marking example
GB/T 13307—91
GB13307
Standard number
Mesh width × mesh length [in meters (m)]
Structural type code (see Table 1)
Basic mesh size/wire diameter
Product series code
Example 1: The basic mesh size is 10 mm, and the wire diameter is 2.50 mm, mesh width 1200mm, mesh length 5000m, B2F material, A-type woven pre-bent mesh mark:
YFW 10/2.50-A-B2F-1.2X5 GB 13307 Example 2: The basic mesh size is 2.5mm, the wire diameter is 7.25mm, the mesh width is 1000mm, the mesh length is 25000mm, 1Cr18Ni9 material. R-type woven pre-bent mesh mark: YFW 2.5/1.25.B-1Cr18Ni9-1X2.5 GB 133074 Technical requirements
4.1 The wire material shall comply with the provisions of Table 2 of GB 8605. Other metal materials may also be used according to different uses. 4.2
The surface of the pre-bent mesh should be flat and clean, and should not have mechanical damage, rust spots and other defects. 4.3
The warp and weft of the mesh surface should be perpendicular to each other, and the allowable angle is 90°±2°. 4.4
The extended length of the metal wire at the edge of the mesh surface should be neat and consistent. No broken metal wire is allowed in the mesh surface.
The arithmetic mean size deviation of the mesh and the deviation of the large mesh size should comply with the provisions of Table 2, and the number of large meshes should not exceed 10% of the number of meshes in the measurement area. 4.71
4.8The diameter deviation of the metal wire should comply with the provisions of Table 1 of GB8605. 4.9The number of mesh weaving defects per 10 m should comply with the provisions of Table 3. The number of defects in the mesh section greater than or less than 10 m should be converted according to the number ratio specified in Table 3.
Basic mesh size change
-16~25
2-2. 65 ~ 8. 5
2. 00 ~2. 65
The total amount of skipped threads, broken wefts and wefts not exceeding 500 mm in length shall not exceed
pieces/10m2
The overlap size shall not exceed 3~5 mesh
The number of basic mesh sizes shall not exceed
pieces/10m2
4.10 The width of the mesh is 900, 1000, 1250, 1600.2100mm. Other widths of mesh can also be manufactured according to the negotiation between the two parties, and the deviation shall comply with the provisions of Table 4.
Basic dimensions of two holes
GB/T 13307—91
4.11 Pre-bent mesh is supplied in blocks or rolls, the method of which is negotiated by both the supplier and the buyer. 5 Test method
5.1 The quality of the mesh surface shall be visually observed, and defects and scrapped parts shall be clearly marked. 5.2 The verticality of the warp and weft of the mesh surface shall be checked with an angle meter. 5.3 The mesh size shall be measured under the following conditions: At the midpoint of the opposite side of the mesh (Figure 1):
b.Distance from the measuring part to the edge of the mesh;
When the basic mesh size is ≤16mm, it should not be less than 20mm; when the basic mesh size is w>16m, it should not be less than 3 (+). Limit deviation of the width of the reading
c. When measuring, the basic mesh size u16mm should use a measuring tool with a graduation value not less than 0.05mm, and the basic mesh size u>16mm should use a measuring tool with a graduation value not less than 0.5mm or a vernier caliper with a reading value not less than 0.1mm. 5.3.1 When measuring the mesh, first find the large mesh by visual inspection, and then measure it with the corresponding instrument or measuring tool. The calculation of the number of large meshes, for the basic mesh size u≤16mm, it should be measured on a 200mm×200mm mesh surface, and for the basic mesh size>16mm, it should be ensured that 5 basic mesh sizes can be measured continuously on each side. 5.3.2 The inspection of the arithmetic mean size of the mesh should be carried out at the place where the mesh size deviation is the largest, and two points should be measured in the longitude and latitude directions respectively. The connecting lines between the points shall not be parallel to the longitude and latitude directions.
Measurement length: for the basic mesh size w≤16mm, take the length occupied by 10 consecutive meshes; for the basic mesh size w>16 mm, take the length occupied by 5 consecutive meshes. The arithmetic mean size of the mesh is calculated according to the following formula: Where: yuan=α-arithmetic mean size of the mesh, mm; 1-measurement length, mm;
-number of mesh holes in the measurement length, tt||d-diameter of the metal wire, mm.
w-/n-d
5.4 The mesh width is measured with a measuring tool with a graduation value of not less than 0.5mm. 5.5 The deviation of the metal wire diameter is measured with a measuring tool with a graduation value of 0.01mm. The measurement should be not less than 5 points, and the average value is taken as the measurement value.
6 Acceptance rules
GB/T 13307 --91
6.1 Pre-bent mesh products can only leave the factory after being inspected and qualified by the inspection department of the manufacturer. The user has the right to re-inspect the delivered products. 6.2 Pre-bent mesh products adopt the general inspection level II specified in GB2828, single sampling and double sampling plans for acceptance inspection. The batch range of each inspection item and the corresponding sampling plan are shown in Table 5. 6.3
Sampling plan
Inspection items
Mesh support half-mean size deviation
Large mesh efficiency
Same width deviation
Verticality of warp and weft wires
Metal wire diameter deviation
Number of false strips
Number of jumpers
Number of overlaps
Number of broken wefts
Broken yarns on the mesh
6.4 Instructions for use
Batch range
151~280
281~500
5011~1209
1201~3200
151~280
281~500
501~1 200
1 201 3 200
Regardless of batch
First sample
Second sample station
Number of judgments
Qualified quality level
6.4.1 The batch range of towels in Table 5 is calculated based on 1m2 of unit product. For batch ranges greater than 3200m, it shall be determined separately. The mesh calculation average size deviation and the number of large meshes shall be based on the sample size specified in the scheme. It shall be carried out in the warp and weft directions respectively. 6.4.2 If any of the indicators is unqualified, the batch shall be deemed as an unqualified batch. Marking, packaging, transportation and storage
7.1 Marking
GB/T 13307-91
The finished product shall be accompanied by a product certificate, which includes: product name;
net product mark;
quantity;
production date:
quality inspection department stamp;
manufacturer name and trademark.
Each outer packaging surface shall be marked with:
product name;
net product mark,
manufacturer name:
net weight and gross weight:
ex-factory date;
packaging storage and transportation graphic mark.
7.2 Packaging
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 supply and demand parties. 7.2.2 The outer packaging of the finished product can be made of wooden boxes or other packaging materials. 7.2.3 Each outer packaging must be accompanied by documents such as the product certificate. 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.3 Each outer package should be accompanied by a product certificate 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.3 Each outer package should be accompanied by a product certificate 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.
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