GOST 23782-96

• gost-23782-96.pdf (143.61 KiB)
  ГОСТ 23782-96

GOST 23782−96 spongy Titanium. The method of determining the fractional composition

GOST 23782−96

Group B59

INTERSTATE STANDARD

TITANIUM SPONGE

The method of determining the fractional composition

Sponge titanium. Method for determination of fractional composition

ISS 77.120*
AXTU 1809

____________________

* In the index «National standards» in 2007.
ISS 77.120 and 77.120.50. — Note the manufacturer’s database.

Date of introduction 2000−07−01

Preface

1 DEVELOPED by the Interstate technical Committee for standardization MTK 105; Ukrainian scientific-research and design titanium Institute

SUBMITTED to the State Committee of Ukraine for standardization, Metrology and certification

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 9 dated April 12, 1996)

The adoption voted:

3 Resolution of the State Committee of the Russian Federation for standardization and Metrology dated 19 October 1999 No. 353-St inter-state standard GOST 23782−96 introduced directly as state standard of the Russian Federation from July 1, 2000.

4 REPLACE GOST 23782−79

1 Scope

This standard specifies a method for determining the fractional composition of titanium sponge according to GOST 17746.

Method involves sieving the sample through a set of sieves, weighing the individual fractions and calculating their percentage.

2 Normative references

The present standard features references to the following standards:

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

GOST 6613−86 Grids wire woven with square cells. Specifications

GOST 17746−96 spongy Titanium. Specifications

GOST 23780−96 spongy Titanium. Methods of sampling and sample preparation

3 General requirements

3.1 Sampling carried out in accordance with GOST 23780.

3.2 the Size of fractions is determined in accordance with GOST 17746.

4 measuring instruments and auxiliary devices

Drum noise with the angle of inclination of 3° — 5° and a rotation speed of 16−20 Rev/min.

Vibrating screen with tilt angle of 5° — 10° swing frequency 400−500 swings/min.

The mechanical scramblers:

— automatic sieve granulator of AGR-2, «Rotap», etc.

— sieves with wire meshes at 3306 GOST and GOST 6613.

— sieve sheet with square and round holes (Appendix A).

The periodicity of testing sieves — 200 definitions. Check to be not less than 30 of sieves, placed diagonally. If more than 10% of the tested holes have deviations in excess of 5% of the nominal size, the sieve for further use are unsuitable.

Technical scale with a relative error of weighing is not more than 0.1%.

Capacity of aluminum alloy, titanium or stainless steel for food storage screening, shovels, brushes.

5 procedures for measuring

5.1 determination of the mass fraction fractions of titanium sponge was carried out on a drum roar. Determination of the mass fraction fractions (12+5) mm and less hold on the drum or rumble or vibration on a mechanical shaker.

5.2 titanium Sponge served on the screening evenly, avoiding overloading of the sieves. The feed rate of titanium sponge on the drum screen (75±25) kg/min, the vibration — (30±10) kg/min.

5.3 the resulting sieving fractions of titanium sponge is placed in containers and weighed to the nearest 0.1%.

6 Processing of measurement results

6.1 the underflow and overflow samples, %, calculated by the formulas:

; (1)

, (2)

where , is the mass of the bottom and top product, respectively, kg;

 — the total mass of all fractions obtained after sieving.

7 the Permissible error of measurement

The difference between parallel determinations of the appropriate fractions should not exceed 2 abs.%.

8 qualifications

To perform work under this standard allows technicians with qualification not below 3-rd category with III qualifying group with electrical.

Annex a (mandatory). Requirements for the control sheet to sit

APPENDIX A
(required)

A. 1 Control sheet sieve shall be manufactured with square or round holes, staggered (see figure A. 1).

Figure A. 1 — layout of the holes on the leaf city

Figure A. 1 — layout of the holes on the leaf city

A. 2 sides of the square holes and the diameters of the round holes and center-to-center distance (pitch) shall be as specified in figure A. 1 and table A. 1.


Table A. 1

In millimeters

A. S Sieves shall be manufactured from stainless steel sheet according to the drawings approved in the prescribed manner.