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.
Some standard content:
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 13307-91 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 Sizebzxz.net 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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