This standard specifies the terminology and general use, tolerances, technical requirements and inspection methods for industrial wire screens used for screening and filtering. This standard applies to pre-bent or pressure-welded wire screens that conform to ISO 4783-3, and whose materials are high-strength steel, stainless steel or other materials. This standard does not apply to industrial wire screens and wire woven nets that meet ISO 4783-2 "Guide to the selection of mesh size and wire diameter combinations for industrial wire screens and wire woven nets Part 2 Preferred combinations of wire woven nets" (see GB/T 5330 Industrial metal wire textile square hole screens GB/T 18850-2002 Technical requirements and inspection of industrial wire screens GB/T18850-2002 standard download decompression password: www.bzxz.net
This standard specifies the terminology and general use, tolerances, technical requirements and inspection methods for industrial wire screens used for screening and filtration. This standard applies to pre-bent or pressure-welded wire screens that meet ISO 4783-3, and the materials are high-strength steel, stainless steel or other materials. This standard does not apply to industrial wire screens and wire woven nets that meet ISO 4783-2 "Guide to the selection of mesh size and wire diameter combinations for industrial wire screens and wire woven nets Part 2 Preferred combinations of wire woven nets" (see GB/T 5330 Industrial Metal Wire Textile Square Hole Screen

ICS.73.120
National Standard of the People's Republic of China
GB/T18850-2002
idtIS014315：1997
Industrial wire screens
Technical requirements and inspection
Industrial wire screens--Technical requirements and testing2002-10-11 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on 2003-05-01
GB/T18850—2002
This standard is equivalent to ISO14315:1997 "Industrial wire screens Appendix A of this standard is a suggestive appendix.
This standard was proposed by the China Machinery Industry Federation, Technical Requirements and Inspection".
This standard is issued by the National Technical Committee for Standardization of Screen Screening and Particle Sorting Methods. The drafting unit of this standard: Mechanical Science Research Institute, State-owned Factory 540. The main drafters of this standard: Yu Fang, Song Ruxuan, Wu Guochuan. GB/T18850—2002
ISO Foreword
ISO (International Organization for Standardization) is a joint organization of standard groups (ISO member countries) in various countries around the world. The work of drafting international standards is usually undertaken by ISO technical committees. Each international organization, government and private sector that ISO cooperates with also participates in the drafting of standards. ISO also works closely with the International Electrotechnical Commission (IEC) in the field of electrotechnical standardization. Draft international standards adopted by the technical committee are subject to a vote by member states. Publication as a formal standard requires at least 75% of member states to vote in favor.
International standard ISO14315 was developed by the Industrial Wire Screens Subcommittee of the ISO/TC24/SC3 Technical Committee on Screens, Sieving and Other Particle Sorting Methods. National Standard of the People's Republic of China
Industrial Wire Screens wwW.bzxz.Net
Technical requirements and inspection
Industrial wire screens--Technical requirements and inspection testing1 Scope
GB/T18850—2002
idtISO14315:1997
This standard specifies the terms and general use, tolerances, technical requirements and inspection methods for industrial wire screens used for screening and filtering. This standard applies to pre-bent or pressure-welded wire screens that conform to ISO4783-3, and whose materials are high-strength steel, stainless steel or other materials.
This standard does not apply to wire screens that conform to ISO4783-2 "Industrial wire screens and wire woven meshes Guide to selection of mesh size and wire diameter combination Part 2 Preferred combination of wire woven mesh (see GB/T5330 Industrial wire woven square hole screen). 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T10611--1989 Industrial mesh size series (eqVISO2194:1972) G B/T5330.1-2000 Guide to the selection of mesh size and wire diameter combination for industrial metal screens and wire woven nets (egvISO4783-1:1989)
5 Industrial metal wire
JB/T7860-1995
ISO) 4783-2:1989 Guide to the selection of mesh size and wire diameter combination for industrial metal screens and wire woven nets Part 2: Preferred combinations of wire woven nets ISO4783-3:1981
3 Definitions ||tt| |Guide to the selection of mesh size and wire diameter combinations for industrial wire screens and wire weavings Part 3: Preferred combinations of pre-bent or pressure-welded wire screens This standard uses the following definitions.
3.1 Mesh size w
The distance between two adjacent warp or weft wires measured in the middle of the projection plane (see Figure 1). 3.2 Wire diameter d
The diameter of the wires in a wire screen (see Figure 1). NOTE: The wire diameter may vary slightly during the production of the wire screen. 3.3 Pitch P
a) The distance between the centers of adjacent wires. b) The sum of the nominal mesh size w and the wire diameter d (see Figure 1). Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on October 11, 2002, and implemented on May 1, 2003
GB/T18850—2002
Mesh size
3.4 ​​Warp
All metal wires distributed and arranged in the vertical direction
In manufacturing, the screen
3.5 Weft
All metal wires distributed and arranged in the horizontal direction
In manufacturing, the screen
3.6 Mesh size per unit length
In a given unit
3.7 Screening area ratio
a) The number of meshes counted continuously in a row of the entire screen
b) Basic mesh
After the wire diameter and hole path
, the percentage of all mesh areas to the screening area. The percentage of the square of P
U and the basic hole spacing P
rounded to an integer:
........
3.8 Screen type
The way in which the warp and weft threads are pre-rolled or framed to form a screen [see Table A1 in Appendix...(1)
A (suggestive appendix)].
3.9 Stability of industrial wires
The stability of wire mesh is mainly determined by the tension formed by the interweaving and interlocking of the warp
and the weft
Note: It is affected by the ratio of the tensile strength
d of the material and the type
3.10 The mass per unit area
is calculated by the following formula:
Where: d-
wire diameter, mm;
mesh size, mm;
influence of forming depth
coefficient of variation of mesh type (see Table AI in Appendix A); material density, kg/m (see Table A2 in Appendix A). a
Note: Formula (2) gives the mass calculated per unit area (kg/m*), while the actual value may be smaller, with a deviation within 3%. 3.11 Major defects
Product defects that seriously affect the mesh size or the surface quality of the mesh. 4 Technical requirements
(2)
For the technical requirements on mesh size, metal wire and mesh size and wire diameter combination of metal wire screen, please refer to GB/T10611, GB/T5330.1JB/T7860 and ISO4783-3. 2
4.1 Wire diameter tolerance
GB/T188502002
Before weaving, the wire diameter tolerance shall be as specified in JB/T7860. The weaving process usually causes the wire to deform, thus affecting its wire diameter. After weaving, the wire diameter tolerance is not specified and the wire diameter shall be measured as specified in 5.1. 4.2 Mesh size tolerance
The mesh size tolerance is given in Table 1.
Note: The subscript letter "s" is used to indicate industrial wire screen. 4.2.1 Tolerance Y.: The arithmetic mean size Y of the mesh is the tolerance of the arithmetic mean of the mesh size measured and calculated in the warp and weft directions. The arithmetic mean deviation of the actual mesh size should not exceed the basic size ± Y.
4.2.2 Tolerance X.: The maximum value of the mesh size CHINA
X. The value is the maximum letter allowed by all mesh sizes to deviate from the basic size and the actual size. According to experience, due to the single mesh
mesh basic size
63w125
16
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