GOST 3306-88

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  ГОСТ 3306-88

GOST 3306−88 Grid with square cells from steel corrugated wire. Specifications

GOST 3306−88
Group В76

INTERSTATE STANDARD

NETS WITH SQUARE CELLS FROM STEEL CORRUGATED WIRE

Specifications

Nets with square meshes from steel corrugated wire.
Specifications

ISS 77.140.65
OKP 12 7500, 7700 12

Date of introduction 1990−01−01

INFORMATION DATA

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

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 27.09.88 N 3275

3. REPLACE GOST 3306−70

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

5. Limitation of actions taken by Protocol No. 4−93 of the Interstate Council for standardization, Metrology and certification (ICS 4−94)

6. REISSUE

This standard applies to the grid with square cells of the pre-corrugated wire, designed for screening coal, oil shale, coke, ferrous and nonferrous metals, agglomerate, pellets, nonmetallic construction and other lump and granular materials, as well as for filtering.

1. BASIC PARAMETERS AND DIMENSIONS

1.1. Meshes are divided as follows:

— accuracy of the width of the cell in the light:

normal exactly

high accuracy — P;

— design:

CHR — partially corrugated weft wires have a bending slab in the ground weave and the warp wires are not fluted, not have a bend in the manufacture (Fig.1);

Damn.1

R — corrugated — wire warp and weft are of the bending slab in the ground weave (Fig.2);

Damn.2

CP — corrugated hard — wire warp and weft have the added curves of the fluting on the sides of the cell (Fig.3).

Damn.3

1.2. The nominal width of the cell in light and diameter of wire for warp and weft shall be as given in table.1.

Table 1

1.3. Permissible deviation from the nominal size of the cell in light should not be more than the values given in table.2.

Table 2

1.4. Mesh width should be 1000, 1250, 1500, 1750, 2000 mm. On demand of the consumer for meshes partially corrugated, the width should be up to 2500 mm with an intermediate gradation 100 mm.

Maximum deviation of the mesh width from the nominal shall not exceed the values given in table.3.

Table 3

In millimeters

Examples of symbols

Mesh corrugated, normal accuracy, N 13, wire of high-alloy steel grade 20X13, with a diameter of 3.0 mm:

Mesh P13−3,0−20X13 GOST 3306−88

The grid is partially fluted, high accuracy, N 3, made of carbon wire with a diameter of 1.4 mm:

Mesh PCRS-1,4 GOST 3306−88

Mesh hard corrugated, normal accuracy, N 70, from low carbon wire with a diameter of 8.0 mm:

Mesh CP 70−8,WELL 0 GOST 3306−88

2. TECHNICAL REQUIREMENTS

2.1. Mesh shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

2.2. Mesh shall be manufactured from wire raw on OST 14−4-210:

— carbon from steel grades 45, 50, 55;

— low carbon steel with a diameter of 8.0, 10.0 mm;

— high-alloy steel grades 12X18H9T, 12X18H10T, with a diameter of 0.9−6.0 mm, wire heat-treated high-alloy steel grades 20X13, 30X13 churchyard 18143 diameter of 0.9−6.0 mm wire vysokoergonomichnoy steel grade G12, with a diameter of 3−8 mm according to normative-technical documentation.

2.3. On the surface of the wire bending of the slab should not be cracked.

2.4. Turning and free movement of the individual wires in the grid are not allowed. For CR mesh from wire with diameter 1.0−1.3 mm for all steel grades and for belts of all designs and wire diameters from high-alloy steel grades allowed the overturning of separate wires in the amount of not more than two 1 mgrid.

2.5. The mesh should not be torn wires.

Allowed connection of the ends of the wires laying all overlap or lengthening the length of at least three cells. Connection vnahlestku or extension should be no more than one at the 1 mgrid. On the grid, made maps, one wire should be no more than one connection.

2.6. The ends of the warp and weft wires in the finished grid must be cut, and their length should not exceed:

It is possible to manufacture wire mesh with a diameter of more than 5.0 mm without trimming wires duck within the specified values.

2.7. Mesh the Czech Republic should be rolled into a coil. The coil may consist of several pieces of the grid with a length that is a multiple of the specified user.

The minimum length of a piece of the mesh roll shall be not less than 1000 mm.

Mesh P and CP are made in the form of rectangular cards with a length up to 5000 mm, and at the request of the consumer — length of more than 5000 mm.

Limit deviation of the length of the piece of mesh in roll or card — ±50 mm.

2.8. Each roll of netting should be tied low carbon wire diameter 1.8−2.5 mm according to GOST 3282 or OST 14−4-210 in three places — the middle and edges.

Packaging nets, transported to the far North and the districts equated to them, — according to GOST 15846.

2.9. Roll weight is 300−1500 kg. At the customer’s request coil weight should not exceed 80 kg.

2.10. The grid formed in the packages of rolls or cards according to GOST 19041 and GOST 24597.

The mass of the package shall not exceed 1500 kg. as a means of packaging the used wire rod with a diameter of 6.5 mm for OST 14−15−193 or tape according to GOST 3560. The package linked in at least two places.

2.11. To every roll or package must be attached to the 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 or rolls in the package or pieces of the mesh roll.

2.12. Transport marking under GOST 14192.

2.13. The living section and the theoretical weight of 1 mmesh is given in app.

3. ACCEPTANCE

3.1. Mesh take parties. The party should consist of a grid of the same design, of the same number, size and material shall be furnished in one document about quality that contains:

is the trademark or name and trademark of manufacturer;

— the symbol grid;

— the length and width of the mesh roll or card;

— the number of cards or rolls;

the total number of mesh in square meters.

3.2. To check for broken wires and cracks on the surface of the wire, the wire diameter, number of perevarivaniu and connections wires, the width of the cell in the light, the length and width of the grid from party select 10% of the grid, but at least two cards or two rolls.

3.3. If unsatisfactory validation results of at least one of the indicators, it conducted a re-verification at twice the number of cards or rolls. The results of re-examination extends to the whole party.

4. TEST METHODS

4.1. Wire diameter is measured with a micrometer according to GOST 6507 to the manufacture of wire and on the exposed ends of the wire in the grid. Tolerance on wire diameter check before the production of the grid.

4.2. Absence of cracks on the surface of wire in the bends of the corrugations is determined visually in the process of slab and on the surface of the wires in the grid. If there is disagreement in the assessment of the presence of cracks, use a magnifying glass IF-3−10GOST 25706.

4.3. The absence of broken wires, the number of perevarivaniu and connections of the wires in the grid is determined visually.

4.4. The width of the cell in the light is determined separately in the direction of weft and warp as the average results of three measurements in three places of the grid distant from the edges of the canvas not less than 100 mm. a Straight line connecting any two measurements must not coincide with the direction of weft and warp.

The width of the cell (mm), calculated by the formula

,

where  — the length of the plot on which located consecutively counted cells from the start of the first wire to the start of the last, mm.

 — the number of measured cells is equal to 15 for the nets NN 1, 6 to 10 N = 10 for meshes from N 12 to N 25, which is 5 for nets from N to N 32 100;

is the actual diameter of wire, mm.

The length of the measuring ruler according to GOST 427. Final result for the width of the cell in light should be the arithmetic mean of three measurements in each direction.

4.5. The width and length of the mesh measured at the ends of the wires. Measure the width of the line of the churchyard 427 or measuring tape according to GOST 7502, the length of the ruler according to GOST 427, GOST roulette 7502или the counter. The length of the protruding ends of the warp and weft wires measured with a ruler churchyard 427.

4.6. The diameter of the cell in the light, the length of the protruding ends of the warp and weft wires, the wire diameter, the mesh width is measured partially patterned on the outer layer of the mesh roll.

Absence of cracks on the surface of wire in the bends of the corrugations, broken wires, the number of perevarivaniu and connections of wires are checked in the manufacturing process of the grid.

5. TRANSPORTATION AND STORAGE

5.1. The mesh is transported by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species. Stowage and securing of cargoes transported by rail, must comply with the technical conditions of loading and fastening of cargoes, approved by the Ministry of Railways.

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

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

APPLICATION (reference). The living section and the theoretical weight of 1 square meter grid

APP
Reference

The living section and the theoretical weight of 1 mof the grid

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