GOST 6613-86 (text) free download

Non-compliance with GOST 6613-86 is punishable by law

GOST 6613-86 applies to woven wire mesh with square cells made of non-ferrous metals and their alloys , used to control and separate materials by particle size, filter liquids, gases and other purposes.

1. MAIN PARAMETERS AND DIMENSIONS

1.1. Grids according to manufacturing accuracy are divided into:
normal accuracy - N
high precision - B
control - K
The manufacturing accuracy and applicability of the grids are indicated in Table. one

Table 1

1.2. The nominal size of the side of the cells in the light, the diameter of the wire, the maximum deviations of the dimensions of the cells and the diameter of the wire of the grids must correspond to those indicated in Table. 2-4.
OKP codes are given in mandatory Appendix 1.

Table 2

Meshes of normal accuracy
Dimensions, mm

(Changed edition of GOST 6613-86 , Amendment No. 1)

Table 3

High Precision Meshes
Dimensions, mm

Table 4

Grids control
Dimensions, mm

1.3. The width of the grids must correspond to that indicated in the table. five.

T a b l e 5

1.4. The minimum length of the mesh segment must correspond to that indicated in Table. 6.

T a b l e 6

1.5. The number of cells, the open area and the mass of the meshes are indicated in the reference appendix 2.
An example of a symbol for a grid of normal accuracy of semi-tomp number 05:

Grid semi-tumpy 05 N GOST 6613-86.

2. TECHNICAL REQUIREMENTS

2.1. Grids must be manufactured in accordance with the requirements of GOST 6613-86 according to the technological documentation approved in the prescribed manner.
2.2. For the manufacture of grids of control, high and normal accuracy numbers 004-016, bronze wire of the BrOf 6.5-0.4 brand according to GOST 5017-74 should be used, for grids of numbers 0071-2.5 - wire from semi-tumbler grade L-80 according to GOST 15527-70.
Grids must be made of annealed wire.
(Revised edition, Rev. No. 1).
2.3. On the surface of the wire there should be no traces of broach, cracks that affect the size of the sides of the cells, as well as captivity, sunsets and scale.
Tempering colors are allowed.
2.4. In the manufacture of nets, plain and twill weave is used (drawing).

The types and order of weaving the grids must correspond to those indicated in Table. 7.

Table 7

For twill weave nets, it is allowed to use the wire of the nearest larger diameter as a weft, indicated in Table. 2, 3 and 4.
2.5. The grids should not have mechanical damage, breaks in wires longer than 10 mm, sharp bends that affect the size of the cells, sewn places and green corrosion spots.
2.6. The number and size of weaving defects for every 25 m2 should not exceed those indicated in Table. 8.
For nickel nets, the allowed number of weaving defects is increased by 25%.
2.7. The distance between defective areas (mechanical damage, wire breaks more than 10 mm long, overlaps, mesh sections that do not comply with Tables 2-4, 7, 8, etc.) along the length and width of the meshes must be at least:
100 mm - for mesh numbers 004-008;
300 mm - for mesh numbers 009-025;
500 mm - for mesh numbers 028-2.5.

Table 8

The total area of defective sections of the nets should not exceed 10% of the total area of the net in the roll.
(Revised edition, Rev. No. 1).
2.8. In the manufacture of nets on shuttleless mills, the ends of the weft wires in the edges must be cut off.

3. ACCEPTANCE RULES

3.1. To check the compliance of the grid with the requirements of GOST 6613-86 , acceptance tests are carried out.
3.2. Grids are presented for acceptance in batches. The batch must consist of nets of the same number and material and is issued with one quality document containing:

trademark or name and trademark of the manufacturer;
grid symbol;
test results (arithmetic mean and maximum cell size);
name of the wire material;
wire diameter, mm;
number of mesh segments in a roll;
the number of meters in each segment or roll;
stamp of technical control;
release date.

3.3. Grids are subjected to continuous control.
3.4. Upon receipt of unsatisfactory test results for at least one of the indicators, the corresponding section of the grid should be conditionally excluded from the total footage of the grid.

4. TEST METHODS

4.1. Tests and measurements must be carried out under normal climatic conditions in accordance with GOST 20.57.406-81.
4.2. Grids are checked on the control table or testing machine when rewinding the roll. Grids of numbers 004-056 are checked by translucence.
4.3. The dimensions of the sides of the cells in the light with the maximum deviation must be checked in places with the greatest deviations, but not less than in three places and not closer than 20 mm from the edges.
The dimensions of the sides of the cells in the light are measured separately for the warp and weft:
for grid numbers 004-045 - with a microscope with an eyepiece micrometer at a magnification of 50-120x with a scale division of 0.001 mm;
for grid numbers 05-2.5 - with a microscope at a magnification of 24-40x with a scale division of 0.01-0.05 mm.
4.4. The number of cells with maximum deviations from the nominal size is determined per 1 dm2 of the grid.
4.5. To determine the arithmetic mean size of the side of the cell in the light, the number of cells at a certain length is counted or the length of the section corresponding to a certain number of cells is measured.
The check is carried out in places with the greatest deviations, but not less than in three places and not closer than 20 mm from the edges.
The arithmetic average size of the side of the cell in the light (a) for the base and for the weft is determined by the formula

where for grid numbers 004-056:
l is the length of the section on which sequentially counted cells are located, equal to:
for mesh numbers 004-0063 - 2 mm,
for mesh numbers 0071-014 - 5 mm,
for mesh numbers 016-056 - 10 mm;
n is the number of cells sequentially counted in a section of length l ,
d is the wire diameter, mm;

for grid numbers 063-1;
l is the length of the section on which 30 cells sequentially counted in the corresponding direction are located, mm;
n is the number of sequentially counted cells, equal to 30;
d is the wire diameter, mm;

for grid numbers 1.25-2.5:
l is the length of the section on which 20 sequentially counted cells are located, mm;
n is the number of sequentially counted cells, equal to 20;
d is the wire diameter, mm.

The length of the section and the count of the number of cells are measured with a microscope:

for mesh numbers 004-0063 - at a magnification of 30-40x;
for grid numbers 0071-014 - at a magnification of 24-40x;
for mesh numbers 016-056 - with a textile magnifying glass at a magnification of 7-10x according to GOST 25706-83 or another equivalent tool;
for mesh numbers 063-2.5 - with a measuring ruler in accordance with GOST 427-75 with a division value of 1 mm.

4.6. The diameter of the wire is measured before threading on the loom.
A wire with a diameter of 0.03-0.10 mm is checked with an optimeter with a scale division of 0.001 mm or another equivalent instrument, with a diameter of 0.11-0.5 mm - with an MP 25 lever micrometer according to GOST 4381-80.
4.7. The width of the mesh is checked in three places of the mesh segment at a distance of at least 50 mm from its ends and in the middle, with a measuring ruler with a division value of 1 mm in accordance with GOST 427-75.
4.8. The length of the mesh segment is measured with a measuring ruler with a division value of 1 mm according to GOST 427-75.
4.9. The quality of the wire surface, the interlacing of the wires and the presence of weaving defects are checked visually.
4.10. The area of defective areas and the distance between them is measured with a measuring ruler with a division value of 1 mm according to GOST 427-75.
4.11. Defective areas of the grid should be marked with a soft pencil. It is allowed to mark weaving defects with a soft pencil.
4.12. The correctness of labeling and packaging is checked by external inspection.
4.13. The gross weight of the box is checked by weighing on a scale according to GOST 14004-68 with an error of not more than 1%.

5. MARKING, PACKAGING, TRANSPORT AND STORAGE

5.1. Grids must be wound with uniform tension in rolls with a diameter of not more than 190 mm on pipes made of aluminum alloys in accordance with GOST 18482-79 or pipes made of other materials that are not inferior in strength to aluminum and do not cause corrosion of grids, according to regulatory and technical documentation. It is allowed not to wind grids of numbers 04-2.5 of normal accuracy on the pipe (or rod).
5.2. The length of the net in a roll must be at least 3 m. The roll may consist of several sections of the net of the same number.
5.3. The mesh roll must be wrapped with paper in accordance with GOST 23436-83 and two-layer bituminous paper in accordance with GOST 8828-75 and tied in the middle and along the edges so as to ensure the safety of the mesh from unwinding.
Bronze nets are packed in paraffin paper according to GOST 9569-79 and two-layer bituminous paper according to GOST 8828-75 and tied up in the middle and along the edges.
It is allowed to pack in other paper, which ensures the safety of the mesh, according to the normative and technical documentation.
The mesh roll must be packed in a wooden box in accordance with GOST 16511-86 or other wooden boxes according to normative and technical documentation. The roll in the box must be fixed with the help of inserts in a horizontal position with the points of support on the protruding ends of the pipe.
Grids of numbers 04-2.5 of normal accuracy are allowed when transported by wagon shipments and not packed in containers in boxes.
At the request of the consumer, the mesh roll is packed in paper in accordance with GOST 23436-83 and PVC plasticized film in accordance with GOST 16272-79 or other film that ensures the safety of the quality of the mesh, according to regulatory and technical documentation.
5.4. Packing of nets intended for the regions of the Far North and hard-to-reach areas must be carried out in accordance with the requirements of GOST 15846-79.
5.5. The weight of the package must not exceed 80 kg. Consolidation of packages into transport packages is carried out in accordance with the requirements of GOST 21929-76 and GOST 24597-81.
5.6. Transport marking - in accordance with GOST 14192-77 with the application of handling signs "Caution, fragile", "Afraid of dampness", "Up, do not turn over".
5.7. Nets are transported by all types of transport in covered vehicles in accordance with the rules for the carriage of goods in force for this type of transport.
Grids are transported by rail in carloads or small shipments. Transportation in containers in accordance with GOST 18477-79 is allowed.
5.8 The conditions for transportation and storage of nets in terms of the impact of climatic factors must comply with the requirements of GOST 15150-69, hardness group 6.
Mesh storage conditions must comply with the requirements of GOST 15150-69, groupne rigidity 2.

APPENDIX 2
Reference

Number of cells, open area and mesh weight

The living section of the grid (P) is calculated by the formula

where d is the wire diameter, mm,
a is the size of the side of the cell in the clear, mm