GOST 9074-85

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  ГОСТ 9074-85

GOST 9074−85 Mesh slit on the coupling studs. Specifications (with Amendments No. 1, 2)

GOST 9074−85

Group В76

INTERSTATE STANDARD

MESH SLIT ON THE COUPLING STUDS

Specifications

Joined by pins slot cloths.
Specifications

ISS 77.140.65
OKP 12 7500
12 7700

Date of introduction 1987−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of metallurgy of the USSR

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 20.12.85 N 4447

3. REPLACE GOST 9074−71

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. The expiration time limit is removed by the Resolution of Gosstandart of the USSR from 08.04.91 N 456

6. EDITION with Amendments No. 1, 2 approved in November 1989, April 1991 (IUS 2−90, 7−91)


This standard applies to the grid slot is designed for classification, dewatering, filtration, washing, drying materials. Mesh is used in environments with pH from 1 to 14.

Slotted grid is a flat card with a smooth surface assembled from separate wire grate shaped, fastened the connecting rods, placed at a certain distance from each other perpendicular to the direction of the grate.

(Changed edition, Rev. N 1).

1. BASIC PARAMETERS AND DIMENSIONS

1.1. Meshes are divided as follows:

— the type section of the grate: 1, 2, 3, 4;

— for precision manufacturing:

normal exactly

high accuracy — P.

Types and dimensions of the cross section of the grate should match that shown on the devil.1 and in table.1.

Damn.1

_____________
* Dimensions for reference.

** According to agreement between manufacturer and consumer.

Table 1

In millimeters

1.2. The radius of the fillet between the working side of the grate and the sides must meet the specified in table.2 for the high alloy wire in the table.3 for low carbon and brass wire.

Table 2

In millimeters

Table 3

In millimeters

At the request of the consumer for grids with a gap up to 0.3 mm inclusive to 0.20 mm.

By agreement between the consumer and the manufacturer to mesh with a gap size of 0.5 and 0.8 mm wire diameter 4,0 mm 0,50 mm.

1.1, 1.2. (Changed edition, Rev. N 1, 2).

1.3. The dimensions of the grid should match those in hell.2 and in table.4.

Damn.2

Table 4

In millimeters

Notes:

1. The maximum and minimum length of the grid set based on the ratio of accepted center-to-center distances .

2. The width size of the grid includes the size of the side straps and nuts.

3. Size values are given for the manufacture of tools.

1.4. The slot width for the grids must be: 0,10; 0,12; 0,16; 0,20; 0,25; 0,30; 0,35; 0,40; 0,50; 0,60; 0,80; 1,00; 1,20; 1,40; 1,50; 1,60; 2,00; 2,50; 3,00; 4,00; 5,00; 6,00 mm.

1.3, 1.4. (Changed edition, Rev. N 2).

1.5. The inner diameter of the rings of the grate should be 8,0mm and 10,0mm for mesh of high accuracy and 8.0mm and 10.0mm for meshes normal accuracy.

(Changed edition, Rev. N 1).

1.6. (Deleted, Rev. N 2).

1.7. Limit deviation of the mesh width ±3 mm grids for increased accuracy and ±5 mm for meshes normal accuracy.

(Changed edition, Rev. N 1).

1.8. Limit deviation of the size of the gap shall be as given in table.6.

Table 6

Dimensions are in millimeters

1.9. Limit deviation of the size of the working part of the grate shall be as given in table.7.

Table 7

The working side of the grate

In millimeters

1.8, 1.9. (Changed edition, Rev. N 1, 2).

1.10. Maximum deviations in center-to-center distances in the grid mm, step:

1.11. (Deleted, Rev. N 1).

1.12. The sizes of side and additional straps must be chosen from GOST 4405 host 103:

At the request of the consumer side width and additional strips to 60 mm.

Examples of symbols

Mesh grate, type 1 brass brand L68 wire diameter 2.0 mm, gap 0.25 mm, normal precision:

Grid 1-L68−20−0,25 GOST 9074−85

Same with the grate-type 2 from high-alloy wire steel grade 08H18N10, with a diameter of 6.0 mm, with a gap of 3.0 mm high precision:

Grid 2−08X18H10−60−3,0-P GOST 9074−85

Same with the grate bars of the type 3 of low carbon wire, diameter 4.0 mm, gap 1.0 mm, normal precision:

Grid 3-NU-40−1,0 GOST 9074−85

Same with the grate type 4 of high-alloy wire steel grade 08H18N10, diameter 2.5 mm, gap 1.0 mm, normal precision:

Grid 4−08X18H10−25−1,0 GOST 9074−85

(Changed edition, Rev. N 1, 2).

2. SPECIFICATIONS

2.1. Mesh shall be manufactured in accordance with the requirements of this standard on technological regulations and drawings, approved in the prescribed manner.

2.2. For the manufacture of a wire grate mesh should be applied:

— wire of steel 08H18N10, 12H18N9, 12X18H9T, 12X18H10T 10H17N13M3T thermally processed by bright annealing or etched on the NTD;

— wire of steel grade 12X13 thermally treated oxidized according to GOST 18143;

— brass wire semi-hard, or soft alloys brands L63 and L68 GOST 1066;

— wire low-carbon steel 08KP; 10; 15; 20 for NTD.

For grids with the size of the gap to 0.3 mm inclusive shall apply steel wire, heat treated, bright annealing, extra accuracy on the other 14−4-1563 low carbon, high alloyed on the other 14−4-1571 and semi-solid or soft brass high precision wire according to GOST 1066.

Brand metal and alloy wire grate is set by the user. The use of grades of steel depending on the working conditions of slit grids is given in Annex 1.

2.3. The connecting pins are manufactured in diameters of 8.0mm and 10.0mm according to GOST 2590, GOST 7417 of steel grades:

— 20X13, 12KH18N9T, 08H18N10, 12H18N9, 12X18H10T 10H17N13M3T according to GOST 5949 for furnace bars of high-alloy wire;

— St3kp GOST 380 and rolled according to GOST 535, 10kp at the NTD for the grates of mild steel and brass.

Brand of steel connecting pins of high-alloy wire indicates the consumer; in the case of the absence of studs shall be made of steel grade 20X13.

By agreement between the consumer and the manufacturer is allowed to produce studs from other materials according to the current NTD.

2.2, 2.3. (Changed edition, Rev. N 1, 2).

2.4. The connecting studs shall bear on both sides thread M8, M10 according to GOST 24705. The tolerance of the thread — 8g according to GOST 16093.

The length of the studs should equal the width of the grid, with the exception of studs designed for packing that need to be 30−60 mm long.

2.5. Side and extra straps shall be made of carbon steel grades CT0 and St3kp GOST 380 and rolled according to GOST 535, and at the request of the consumer from a strip high-alloy steel grades 20X13, 12KH18N9T, 12KH18N10T 12KH18N9 and GOST 5949.

2.6. Mesh are made with additional straps (or without them), which are mounted along the wire grate, and with two extra straps set in the middle of the map. The distance between the additional bars shall be 150−250 mm, the distance between the two additional straps in the middle of the card not less than 20 mm.

On-Board and additional modules can act on working and non-working sides of the mesh, and set flush with the working or non-working sides of the mesh.

2.5, 2.6. (Changed edition, Rev. N 1).

2.7. The size of the straps accept the demand of the consumer, in the absence of requirements sets the size of the manufacturer.

2.8. To build the meshes used nut strength class 5 according to GOST 5915 with thread diameters M8, M10. The tolerance of the thread — 7N.

2.9. By agreement between the consumer and the manufacturer of the wire grate bars shall be manufactured with single lateral projections (Fig.3A) or with double lateral projections (Fig.3b).

Damn.3

The width of the ledge should be 2−3 mm. In mesh side tabs should be the same. The presence of lateral protrusions indicated by the consumer.

(Changed edition, Rev. N 2).

2.10. The length of the grid must be a multiple of the distance between the centers of the connecting pins.

2.11. Movement of individual elements in the finished grid are not allowed. Allowed the offset of the working surfaces of the grates with a wire relative to each other within 0.3 mm.

(Changed edition, Rev. N 2).

2.12. At the customer’s request the mesh can be manufactured in an unassembled form, while stipulate the completeness of the unfocused grids, connectors, studs, side straps, the screws and their sizes.

2.13. (Deleted, Rev. N 2).

2.14. The living section of slit grids is given in Annex 2. Theoretical weight of 1 mmesh of high-alloy and low-carbon wire mesh with a width of 1000 mm are shown in Annex 3.

3. ACCEPTANCE RULES

3.1. Mesh take parties. The party should consist of grids of the same type of the grate and the size of the gap, the same width and length, and the same material shall be furnished in one document about quality that contains:

is the trademark or name and trademark of manufacturer;

— the symbol grid;

the material of the pin;

— the length and width of the grid;

— number of grids (maps) of the party.

3.2. To check the average size of gap, size of the individual slits, dimensions of cross-sections of the wire grate (operator side, the height of the grate, the fillet radius between the working side of the grate and side-to-side), length and width of the grid bias of the working surfaces of the grates with a wire relative to each other, the inner ring diameter and center-to-center distance from party select 10% of the nets, but at least two cards.

3.1, 3.2. (Changed edition, Rev. N 1).

3.3. If unsatisfactory validation results of at least one of the indicators, it conducted a re-test of the doubled sample. The results of re-examination extends to the whole party.

4. CONTROL METHODS

4.1. Control the average of the size of the gap is carried out by measuring with a ruler the churchyard 427 total length of at least 10 steps for grids with a gap of 0.8 mm or at least 50 steps, with a gap to 0.6 mm inclusive by dividing the size obtained by the number of steps and subtract the actual size of the working part of the grate.

(Changed edition, Rev. N 1).

4.2. The width of an individual slit measuring probe according to NTD, a reading microscope of MPB-2, a caliper with a scale division on the Vernier is 0.05 mm according to GOST 166.

4.3. The actual size of the working part of the grate is measured with a micrometer according to GOST 6507или microscope readout type BCH-2 (Brinell magnifier) at NTD.

4.4. The height of the grate, the inner ring diameter and center-to-center distance measured by Vernier caliper according to GOST 166.

4.5. (Deleted, Rev. N 1).

4.6. The offset of the working surfaces of the grates with a wire relative to each other is measured by a depth gauge of a caliper according to GOST 166 by setting his rod perpendicular to the axis of the wire grate.

4.7. The length and width of the mesh measured in any location on the map by the same elements (burner, bracket, stud) ruler according to GOST 427 or measuring tape according to GOST 7502.

4.8. The radius and the angle between the working side of the grate and side is controlled with the help of tool microscope BMI-1 according to GOST 8074.

4.9. The radius and the angle between the working side of the grate and sides, internal ring diameter, center-to-center distance provided by technology and controlled in the manufacturing process.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. The grid must be transported by packets according to GOST 26663, or in universal containers. The package must be formed from the sets, consisting of two nets laid surfaces to each other and held together with earrings packaging and special connecting studs with nuts. The step of fastening the earrings should not exceed 1 m.

The ends of the grids needs to packages, possibly through an boards in accordance with the devil.4. The cross-section dimensions of the boards 25x40, 25x70, 25x100 mm Length of boards equal to the width of the grid. When carload shipments, and the containers are allowed for transporting grids without trim the ends of boards.

Damn.4

The package dimensions shall not be less than 300x500 mm and not more than 2100x5100 mm. gross Weight of package — not more than 1000 kg. the Package should be tied with annealed wire with diameter 4.0−6.0 mm on the other 14−4-1563, GOST 3282 or packing tape (the graveyard 3560) with a thickness of 0.5−1.5 mm and a width of 20−30 mm. Step of the bindings should not exceed 1 m.

Allowed in a package of meshes forming one set consisting of three meshes, packaged according to claim 5.1.

Allowed laying of the mesh package on wooden bruski section not less than 80x100 mm.

(Changed edition, Rev. N 2).

5.2. Sets of meshes, manufactured not assembled should be Packed in wooden boxes type I according to GOST 10198 and type II according to GOST 2991.

The gross mass of the box according to GOST 10198 shall not exceed 1000 kg according to GOST 2991 must be from 55 to 110 kg.

. One set should be an indication belonging to the set.

5.3. Sets of meshes with size 1200x800 mm inclusive and wooden boxes according to GOST 2991 should be formed into transport packets in accordance with GOST 26663. Allowed the formation of packages without the use of pallets.

The strapping of packages produced according to claim 5.1.

5.4. Mesh transported to the far North and remote areas, at the customer’s request, Packed in boxes in the NTD. The drawer design shown in hell.5.

Damn.5

The dimensions of the box:

The gross mass of the box must not exceed 2000 kg for transportation of boxes without padding the ends of the nets boards in accordance with clause 5.1 mandatory.

5.3, 5.4. (Changed edition, Rev. N 2).

5.5. To each package or box shall be securely attached a label, which indicate:

is the trademark or name and trademark of manufacturer;

— the symbol grid;

— the length and width of the grid;

— the number of cards in the package.

(Changed edition, Rev. N 2).

5.6. Transport marking — according to GOST 14192. The arrangement of strapping is given on features.6.

Damn.6

5.7. The transportation grid must be carried out by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this type, and conditions of loading and fastening of cargoes, approved by the Ministry of Railways.

Transportation by rail produces carload, light-duty or small shipments.

In covered wagons grid over a length of 1880 mm transporterowych kits.

(Changed edition, Rev. N 2).

5.8. The storage grid in accordance with the terms 5 according to GOST 15150.

ANNEX 1 (recommended). The use of grades of steel wire grate depending on the working conditions of slit grids

ANNEX 1
Recommended

APPENDIX 1. (Changed edition, Rev. N 1).

ANNEX 2 (informative). The living section of slotted grids

ANNEX 2
Reference

Note. The living section () in percent is calculated by the formula

,

where is the slot width in light, mm;

 — the size of the working part, mm.

APPENDIX 3 (reference). Theoretical weight of 1 square meter grids of high-alloy wire mesh with a width of 1000 mm

APPENDIX 3
Reference

Theoretical weight of 1 mmesh of high-alloy wire
with a width of 1000 mm mesh

Notes:

1. In the numerator of the given theoretical weight of 1 mof a grid without additional brackets in the denominator — with additional straps.

2. The ground mesh consists of a mass of the grates, connectors, studs, straps and nuts.

3. A lot of mesh: brass wire is determined by multiplying the mass indicated in the table by a factor of 1.07.

4. For grids with a width of 250 mm and 500 mm weight of 1 mof the grid increase by 1.4 and 5 kg, respectively.

5. For grids with width 1500 and 2000 mm weight of 1 mof the grid be increased by 2 and 2.5 kg, respectively.

6. A lot of meshes in the intermediate widths find by interpolation.


APP 2, 3. (Changed edition, Rev. N 2).



The text of the document is verified by:
the official publication of the
Mesh metal. Types.
Specifications: Sat. Standards. -
M.: IPK Publishing house of standards, 2003