GOST 9870-61

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  ГОСТ 9870-61

GOST 9870−61 galvanized wire Nails for asbestos cement roofing. Specifications (with Amendments No. 1, 2)

GOST 9870−61
Group В78

INTERSTATE STANDARD

GALVANIZED WIRE NAILS FOR ASBESTOS CEMENT ROOFING

Specifications

Galvanized wire nails for asbestos cement roofing. Specifications

ISS 77.140.65
OKP 12 7100

Date of introduction 1962−07−01

APPROVED by the Committee of standards, measures and measuring devices under Council of Ministers of the USSR on 30 September 1961 date of introduction is established 01.07.62

Limitation of actions taken by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)

EDITION (February 2009) with Amendments No. 1, 2 approved in September 1976, November 1980 (10−76 IUS, IUS 2−81)

This standard applies to wire galvanized flat-head nails used for fixing asbestos cement roofing sheets.

1. ASSORTMENT

1. The design and dimensions of nails shall be as specified in the drawing and in the table.

mm

Example of designation of the nails, diameter 4 mm, length 90 mm:

Nails 4х90 GOST 9870−61

(Changed edition, Rev. N 2).

2. TECHNICAL REQUIREMENTS

2.1. Nails shall be manufactured in accordance with the requirements of this standard from raw bright low carbon steel wire according to GOST 3282−74.

2.2. Zinc coated nails must be continuous, without gaps, cracks and bulges that are visible without using the magnifying devices.

Permitted at the terminals and base surfaces of the heads of the nails are coated with zinc traces from the clips and from the split dies, and also a slight longitudinal risks.

2.3. Zinc coating heads of the nails must withstand two one-minute immersion in a solution of copper sulphate.

2.4. Maximum deviation from alignment of the stud and nail heads shall not exceed 1 mm.

2.5. Not allowed on nails neocasa alsecco.

2.6. Wedge angle — according to GOST 283−75.

2.7. Theoretical mass of nails specified in the application.

Sec. 2. (Changed edition, Rev. N 2).

2A. ACCEPTANCE RULES

2A.1. Nails take parties. The party should consist of nails of one size and are the same document about quality that contains:

the name of the manufacturer;

the symbol of the nails;

the date of shipment;

the weight of the batch net.

2A.2. Nails for testing should be selected randomly from different places of the party. The sample volume should not exceed 0.5% of the batch, but not less than 40 pieces To check the continuity of the zinc coating from party select 10 pieces of nails.

2A.Z. The party is accepted if the sample number of nails with deviations from the requirements of this standard do not exceed 5%. If the sample number of nails with deviations from the requirements of this standard will be more than 5%, the test is carried out at twice the number of nails. The results of repeated checks apply to the entire party.

Sec. 2A. (Added, Rev. N 2).

3. CONTROL METHODS

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

3.2. The uniformity of zinc coating test by immersion.

3.2.1. The essence of the method

The method is based on the immersion of nails in a solution of copper sulphate.

3.2.2. Reagents and materials

Solution of copper sulphate, prepared by dissolving one part by weight of crystalline copper sulphate according to GOST 4165−78 in five weight parts of distilled water and neutralized with an excess of freshly precipitated hydrate of copper oxide. After neutralization the solution should be filtered. The density of the neutralized solution must be 1,114−1,116 g/cm.

3.2.3. Preparing for the test

Before diving into the solution to remove dirt and grease samples were washed with alcohol, gasoline or benzene. If the samples are washed with gasoline to produce an additional rinse them with distilled water and wipe to remove moisture.

Valid number of samples for test in the same solution of copper sulphate with a volume of 200 ml should not exceed 10.

3.2.4. Testing

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

3.2.5. Processing of the results

If after double dipping in a solution of copper sulphate on the surface of the nail heads will be the areas covered with copper, which, when wiping the sample with cotton wool or a clean cloth, then the specimen is considered to fail the test. Consider the nails without the use of magnifying devices.

4. PACKING, MARKING, TRANSPORTATION AND STORAGE

4.1. Packing, marking, transportation and storage — by GOST 283−75.

Sec. 3, 4. (Changed edition, Rev. N 2).

APPLICATION (reference). THEORETICAL MASS OF NAILS

APP
Reference

APP. (Changed edition, Rev. N 1, 2).