GOST 10298-79

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  ГОСТ 10298-79

GOST 10298−79 Selenium technical. Technical specifications (with Changes 1−5 N)

GOST 10298−79

Group W51

INTERSTATE STANDARD

SELENIUM TECHNICAL

Specifications

Technical selenium. Specifications

ISS 77.120.99
GST 17 6982

Date of introduction 1981−01−01

Resolution of the USSR State Committee for standards from 23.11.79 N 4493 date of introduction is established 01.01.81

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

REPLACE GOST 10298−69

EDITION (November 2004) with Changes in N 1, 2, 3, 4, 5, approved in March 1982, June 1985, July 1990, September 1997, January 2004 (IUS 7−82, 9−85, 10−90, 12−97, 4−2004).


Change 4 N GOST 10298−79 taken by the Interstate Council for standardization, Metrology and certification (minutes N 11 dated 25.04.97)

The adoption of the changes voted:

Change No. 5 adopted by the Interstate Council for standardization, Metrology and certification (Protocol No. 23 of 22.05.2003)

For the adoption of the changes voted by national standardization bodies of the following States: AZ, AM, BY, GE, KZ, KG, RU, MD, TJ, TM, UZ, UA [codes alpha-2 at MK (ISO 3166) 004]


This standard applies to technical selenium, intended for the manufacture of glass, paints, enamels, pharmaceutical production, for obtaining pure selenium and other purposes, and also for selenium, intended for export.

1. TECHNICAL REQUIREMENTS

1.1. Technical selenium brands ST 0, ST 1 is manufactured in accordance with the requirements of this standard on technological regulations, approved in a prescribed manner according table.1.

Table 1

1.2. Chemical composition of selenium should conform to the standards specified in table.2.

Table 2

Notes:

1. At the request of the consumer, technical selenium normalized mass fraction of organic impurities and antimony.

2, 3. (Deleted, Rev. N 3).

4. For Selena brand ST 1 intended for export, the mass fraction of selenium should be not less than 99.5%.

1.1, 1.2. (Changed edition, Rev. N 2, 3).

1.3. (Deleted, Rev. N 3).

1.4. The particle size of the powdered particles of selenium should not exceed 1 mm; powdery selenium must not contain foreign inclusions and lumps.

At the request of the consumer, selenium, designed for pharmaceutical production, manufacture of paint, enamel, high quality glass should have a particle size of not more than 0,63 mm.

1.5. The particle size of powdered selenium, intended for export must be specified in the purchase order of foreign trade enterprises.

1.4, 1.5. (Changed edition, Rev. N 2).

2. SAFETY REQUIREMENTS

2.1. Technical selenium refers to moderately hazardous substances according to GOST 12.1.005−88 GOST 12.1.007−76.

Hazard class 3 according to GOST 12.1.005−88.

Inhalation of selenium causes disease of chronic bronchitis, toxic hepatitis, moderate emphysema, dyskinesia of the gall bladder, thyroid gland, gastrointestinal disorders, nervous disorders.

2.2. Maximum allowable concentration (Mac) of selenium in workplace air should not exceed 2 mg/maccording to GOST 12.1.005−88.

Analysis of air environment of industrial premises on the content of selenium should be carried out in accordance with the schedule approved in the prescribed manner.

(Changed edition, Rev. N 3).

2.3. Jobs for packaging, packing, unloading and sampling of selenium should be equipped with ventilation system ensuring the air environment in premises in accordance with the requirements of GOST 12.1.005−88.

2.4. For protection of respiratory organs working with selenium, you must apply the RPD FA-3 according to GOST 12.4.034−2001 or respirators type «Petal» SB-1 according to GOST 12.4.028−76.

2.5. Working with selenium should be provided with PPE according to the current «Standard industry standards of issue of clothing, footwear and protective equipment to workers and employees of the enterprises of nonferrous metallurgy».

2.6. Working with selenium should be provided with premises according to the current sanitary norms and rules for the third group of production processes; facilities for eating must be provided with hot water.

2.7. Individuals who come into contact with selenium, should undergo periodic medical examinations in accordance with the requirements of national health authorities.

(Changed edition, Rev. N 5).

3. ACCEPTANCE RULES

3.1. Selenium take parties. The party should consist of Selena, one brand, one type and decorated by one document on quality.

The document about quality should contain:

is the trademark or name and trademark of manufacturer;

— brand selenium;

— the batch number;

— the weight of the batch;

— number of places;

— the result of the analysis;

— date of issue;

— the designation of this standard.

(Changed edition, Rev. N 2).

3.2. To determine the chemical composition of the granulated selenium in selected samples from each packaging unit of the party, if there are less than twenty. In the presence of the party for more than twenty packaging units samples are taken from each second of the packaging units.

To determine the chemical composition of selenium in the bars take 10% of the ingots from each batch.

(Changed edition, Rev. N 3).

3.3. To check the quality of powdery selenium requirements of this standard from the party taking the sample according to table.3.

Table 3

3.4. In selenium, derived from products of copper and Nickel production, the content of lead, arsenic and mercury monitored in each of the 30th party.

3.4. Mass fraction of aluminum determined in each batch.

(Added, Rev. N 2).

3.5. The inspection for inclusions and lumps are subjected to each batch.

3.6. If unsatisfactory results of the analysis at least one indicator thereon, a second test at twice the sample taken from the same batch. The results of repeated tests apply to the entire party.

4. TEST METHODS

4.1.Sampling and sample preparation

4.1.1. Spot samples from granular selenium taken by a mechanical sampler or manually robotbrain probe. Each packaging unit selected at the two spot samples. Spot samples are combined. The mass of the joint sample shall not exceed 0.5% of the batch weight. Spot samples taken from bars by drilling through at three points evenly spaced on the diagonal plane of the ingot, or chipping pieces of selenium from different parts of the ingot. Sampling from powdered selenium is carried out according to GOST 23148−98.

The manufacturer is allowed to conduct sampling from the batch of powdered selenium before packaging into packaging units, the number of point samples and the mass of the combined samples should correspond to GOST 23148−98.

The manufacturer is allowed to conduct sampling from the liquid metal before the granulation of selenium in the beginning, middle and end of filling.

(Changed edition, Rev. N 3).

4.1.2. Spot samples are combined, thoroughly mixed, reduce kvantovanie or grooved divider to the mass of 1 kg, crushed and sieved through a sieve with mesh 1 or 1K according to GOST 6613−86. The sieved sample is mixed again, cutting at least 200 g, crushed and sieved through a sieve with a mesh 016К or 016 to GOST 6613−86, divide into parts, one of which was sent for analysis and the other stored in tightly closed cans or in sealed plastic bags, sealed, for 6 months in case of disagreements in quality assessment.

On each jar or bag should be attached label stating:

— the name of the manufacturer;

— the product name;

— batch number;

— dates of sampling and preparation of samples;

the designation of the present standard.

(Changed edition, Rev. N 2, 3).

4.1.3. To determine the particle size of powdered selenium from the combined sample to emit sample of weight 0.5 kg.

4.2. Chemical composition of selenium is determined according to GOST 20996.0−82 — GOST 20996.12−82 or GOST 16273.0−85, GOST 16273.1−85.

The differences in the definition of mass fractions of impurities in technical selenium determination is carried out according to GOST 20996.2−82 — GOST 20996.4−82, GOST 20996.6−82 — GOST 20996.8−82, GOST 20996.10−82, GOST 20996.11−82.

(Changed edition, Rev. N 2).

4.3. Allowed to perform analysis of selenium and other impurities methods of ensuring the accuracy of the determination within the limits prescribed by GOST 20996.0−82 — GOST 20996.12−82, GOST 16273.0−85, GOST 16273.1−85.

4.4. To determine the particle size of powdered selenium in the sample is sieved through sieves with meshes 1K 063К according to GOST 6613−86.

It is possible to use sieves with meshes of 1, 063 according to GOST 6613−86.

(Changed edition, Rev. N 1, 2, 3).

4.5. Check of appearance of selenium is carried out by inspection of the product without the use of magnifying devices.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Each ingot shall be cast or embossed brand selenium.

5.2. Powdered and granular selenium must be Packed in polyethylene bags (5Н4) according to the GOST 17811−78 or single or double bags of polyethylene film according to GOST 10354−82. The film thickness for double bagging must be at least 0.060 mm, single — not less than 0,120 mm.

Filled with selenium polybag brewed sealed seam and placed in a bag packaging tissue N 5 or N 6 according to GOST 5530−81* or of packaging materials of other types, ensuring the safety of products. The outer bag is bonded or attached to it a label stating the brand of selenium and batch number. When packing bags in boxes are allowed to attach a label to each container location.
________________
* On the territory of the Russian Federation GOST 5530−2004. — Note the manufacturer’s database.

Allowed packaging of powdered selenium in galvanized steel drums (IA2) of type BTPBaccording to the GOST 5044−79 with sealed seams. On top of powdered selenium should be closed paraffined paper GOST 9569−79*, the cover drum must be soldered to the body across the generatrix.
________________
* On the territory of the Russian Federation GOST 9569−2006. — Note the manufacturer’s database.

Bars of selenium should be wrapped in wrapping paper according to GOST 515−77, GOST 2228−81или GOST 8273−75.

Bags with powdered selenium or wrapped bars of selenium should be Packed in wooden boxes of types III, IV, V and VI according to GOST 5959−80 or types II-1, II-2 according to GOST 2991−85 or type I-1 according to GOST 10198−91, or in specialized containers SK 3−1,5 at the NTD.

In the boxes type I-1 on the side and end walls, bottom and lid set braces. The cross section of the planks of the bottom and their location should be sufficient for the forks of a forklift truck.

The spaces between the bars should be filled with paper or other material that prevents contamination of selenium.

Supplied for long-term storage of powdered selenium, Packed in galvanized steel drums, placed in a wooden box according to GOST 18573−86 or wooden crates according to GOST 12082−82.

The net mass of selenium in the drawer or drum should not exceed 50 kg.

By agreement with consumer it is permitted to place bags with selenium in boxes with a gross mass not exceeding 400 kg.

Net weight of powdered selenium supplied for long-term storage, must not exceed 40 kg.

By agreement with consumer it is permitted to use another container made according to normative documentation approved in the established order.

(Changed edition, Rev. N 4, 5).

5.3. Transport marking of the containers is carried out according to GOST 14192−96 with application of additional data:

— the product name and brand;

— trademark or name and trademark of manufacturer;

— batch number;

weight gross and net;

— date of issue;

the designation of the present standard.

(Changed edition, Rev. N 1, 2, 5).

5.4. For Selena supplied for long-term storage, labelling burn or applied directly to the container stenciled with indelible paint.

(Changed edition, Rev. N 4).

5.5. Selenium technical all species not classified according to GOST 19433−88 and does not belong to dangerous goods.

(Added, Rev. N 5).

5.6. Selenium is transported by all types of transport in covered vehicles in accordance with cargo carriage regulations applicable to transport of this species.

Selenium is transported in containers according to GOST 20435−75 or GOST 15102−75, or in specialized containers in NTD or in batches GOST 26663−85.

The weight of one package should not exceed 1250 kg. package Dimensions do not exceed values given in GOST 24597−81:

length — 1240 mm width — 840 mm, height — 1350 mm. Means of fastening a steel packing tape according to GOST 3560−73 dimensions up to the thickness 1,5 mm and width 30 mm, thickness of 1.5 mm and a width of 30 mm. Package weight not exceeding 200 kg are allowed to fasten a ribbon thickness of 1 mm and a width of 20 mm.

(Changed edition, Rev. N 1, 2, 3, 5).

5.7. Selenium should be stored indoors, safe in the fire relation.

Under specified storage conditions properties of selenium during storage does not change.

(Changed edition, Rev. N 3).

6. MANUFACTURER’S WARRANTY

6.1. The manufacturer guarantees the conformity of selenium requirements of this standard if the purchaser respects the conditions for transport and storage.

6.2. Warranty period of storage of selenium in an unheated warehouse for five years, heated or eight years from the date of manufacture.

6.3. (Deleted, Rev. N 3).