Galvanized nails for asbestos-cement roofing GOST 9870-61

⇦⇦⇦ Price in the price list (upper left). The specifications for nails are described below.

STATE STANDARD OF THE UNION OF THE SSR

GALVANIZED WIRE NAILS FOR ASBOCEMENT ROOFING

TECHNICAL CONDITIONS

GOST 9870-61

USSR STATE COMMITTEE ON STANDARDS

Moscow

STATE STANDARD OF THE UNION OF THE SSR

Approved by GOST 9870-61 by the Committee of Standards, Measures and Measuring Instruments under the Council of Ministers of the USSR on September 30, 1961. The deadline for introduction is set

from 01.07.62

Checked in 1985. By the Decree of the State Standard of May 15, 1985 No. 1354, the validity period was extended

until 01.01.96

GOST 9870-61 applies to flat-head galvanized wire nails used for fastening asbestos-cement roofing sheets.

1. ASSORTMENT

1. The design and dimensions of the nails must comply with those indicated in the drawing and in the table.

mm

An example of a symbol for nails with a diameter of 4 mm, a length of 90 mm:

Nails 4´90 GOST 9870-61

(Revised edition, Rev. No. 2).

2. TECHNICAL REQUIREMENTS

2.1. Nails must be made in accordance with the requirements of this standard from heat-treated light-colored low-carbon steel wire in accordance with GOST 3282–74.

2.2. The zinc coating of the nails must be continuous, without gaps, cracks and thickenings visible without the use of magnifying devices.

Zinc-plated traces from clamps and split dies, as well as slight longitudinal risks, are allowed on the rods and supporting surfaces of the nail heads.

2.3. The zinc coating of the nail heads must withstand two one-minute immersions in a copper sulphate solution.

2.4. The maximum deviation from the alignment of the rod and the nail head should not exceed 1 mm.

2.5. Unremoved notching is not allowed on the nails.

2.6. Pointing angle - according to GOST 283-75.

2.7. The theoretical mass of nails is indicated in the reference appendix.

Sec. 2. (Changed edition, Rev. No. 2).

2a. ACCEPTANCE RULES

2a.1. Nails are accepted in batches. The batch must consist of nails of the same size, and is issued with one quality document containing:

name of the manufacturer;

symbolic designation of nails;

shipment date;

batch net weight.

2a.2. The nails to be tested shall be selected at random from different locations in the lot. The sample size should be no more than 0.5% of the batch, but not less than 40 pieces. To check the continuity of the zinc coating, 10 pieces are selected from the batch. nails.

2a.3. The batch is considered accepted if the number of nails in the sample with deviations from the requirements of this standard does not exceed 5%. If in the sample the number of nails with deviations from the requirements of this standard is more than 5%, then a test is carried out on twice the number of nails. The recheck results apply to the entire lot.

Sec. 2a. (Introduced additionally, Amendment No. 2).

3. CONTROL METHODS

3.1. Control of the appearance and size of nails - according to GOST 283-75.

3.2. The uniformity of the zinc coating is checked by immersion.

3.2.1. Method Essence

The method is based on immersing nails in a solution of copper sulfate.

3.2.2. Reagents and materials

A solution of copper sulfate prepared by dissolving one weight part of crystalline copper sulfate according to GOST 4165–78 in five weight parts of distilled water and neutralized with an excess of freshly precipitated copper oxide hydrate. After neutralization, the solution must be filtered. The density of the neutralized solution should be 1.114–1.116 g/cm3.

3.2.3. Preparing for the test

Before immersion in a solution to remove dirt and grease, the samples are washed with alcohol, gasoline or benzene. If the samples are washed with gasoline, then they are additionally rinsed with distilled water and wiped to remove moisture.

The allowable number of samples for testing in the same solution of copper sulfate with a volume of 200 ml should not exceed 10.

3.2.4. Conducting a test

Immerse the samples in a solution of copper sulfate. The nail heads must be in the solution at a depth of at least 100 mm in a stationary state, not in contact with each other, with the walls and bottom of the vessel. The temperature of the copper sulfate solution during the test shall be (18 ± 2) °C. Samples should be immersed for 60 s. After each immersion in the solution, the nails are washed with distilled water and wiped with a clean cloth.

3.2.5. Results processing

If, after double immersion in a solution of copper sulfate, there are areas on the surface of the nail head covered with copper that do not come off when the sample is wiped with cotton wool or a clean cloth, then the sample is considered to have failed the test. Nails are examined without the use of magnifying devices.

4. PACKAGING, LABELING, TRANSPORT AND STORAGE

4.1. Packing, marking, transportation and storage - in accordance with GOST 283-75.

Sec. 3 and 4. (Revised edition, Rev. No. 2).

APPENDIX
Reference

THEORETICAL WEIGHT OF NAILS according to GOST 9870-61

(Changed edition, Rev. No. 1, 2).