GOST 8774-75

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  ГОСТ 8774-75

GOST 8774−75 Lithium. Specifications (with Amendments No. 1, 2, 3, 4)

GOST 8774−75

Group W51

INTERSTATE STANDARD

LI

Specifications

Lithium. Specifications

OKP 70 2653

Date of introduction 1977−01−01

Promulgated by decree of the State Committee of standards of the USSR Council of Ministers dated 12 may 1975 N 1252

By the decree of Gosstandart of the USSR from 17.07.91 N 1262 removed the limitation of the validity period

REPLACE GOST 8774−58

EDITION with Amendments No. 1, 2, 3, 4, approved in December 1981, October 1985, December 1989, July 1991 (ICS 3−82, 1−86, 4−90, 10−91).


This standard applies to lithium, obtained by the method of electrolysis used for the production of active catalysts in industrial synthesis, as a degasifier, a modifier and as an additive to alloys of non-ferrous metals to reduce their density, increase resistance against corrosion and improve the mechanical characteristics of alloys and specifies requirements for lithium, izgotovleniu for the needs of the national economy and exports.

The requirements of this standard are mandatory.

(Changed edition, Rev. N 2, 3, 4).

1. TECHNICAL REQUIREMENTS

1.1. Lithium made in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

Lithium are made in the form of ingots brands LE-1, LE-2.

1.2. Chemical composition of lithium must conform to the standards specified in table.1.

Table 1

Note. By agreement with the consumer allowed the mass fraction of sodium in Marche LE-1 is not more than 0.005%.

2. ACCEPTANCE RULES

2.1. Li attended parties. The party should consist of lithium one brand and feature a document about quality that contains:

trademark or the name and trademark of manufacturer;

the name of the metal;

brand lithium;

batch number;

number of seats in the party;

the results of chemical analysis;

the date of manufacture of lithium;

stamp of technical control Department;

the designation of this standard.

The mass of lithium in one batch should not exceed 1500 kg.

(Changed edition, Rev. N 2).

2.2. To control the chemical composition of lithium from each batch sampled.

2.3. If unsatisfactory results of the analysis of at least one of the indicators, a second analysis doubled the number of samples taken from the same batch.

Results re-analysis apply to the entire party.

3. METHODS OF ANALYSIS

3.1. The selection of spot samples is carried out by pouring the liquid lithium after filling each second (tenth — when the mass of the ingot is less than 0.5 kg) of the mold in the form of stainless steel or cut a sample from each of the second (tenth, with weight less than 0.5 kg) solid ingot of stainless steel knife. For the combined sample spot samples of lithium was placed in a crucible, melted and poured into the mold. The mass of the joint sample shall be not less than 200 g.

3.2. The combined sample of lithium cut into four equal parts by the two perpendicular diameters and to reduce the average sample weight of not less than 100 g, taking the metal from opposite parts of the cut ingot.

3.3. An average sample is divided into two equal parts and placed in a clean, dry glass jars with glass ground stoppers or screw caps or banks from any sheet. Banks pre-pour the drained kerosene or transformer oil GOST 982−80, or a mixture of the liquid paraffin according to GOST 23683−89 and drained of transformer oil in 1:1 ratio.

3.4. Cutting, the average sample at PP.3.2 and 3.3 is carried out in an atmosphere of air or argon at a humidity of not more than 0.2 g/m.

3.5. On each jar with the sample labeled indicating:

names of the metal;

batch number;

the date of sampling;

stamp of technical control Department;

designation of this standard.

(Changed edition, Rev. N 2).

3.6. One sample sent to the laboratory for analysis. The second sample shall be kept at the factory for three months from the date of shipment of the lithium party in case of disagreements in the assessment of the quality of the metal.

3.7. Chemical composition of lithium metal is determined according to GOST 8775.0−87-GOST 8775.4−87.

(Changed edition, Rev. N 3).

4. PACKING, MARKING, TRANSPORTATION AND STORAGE

4.1. Lithium metal Packed in bag of polyethylene film GOST 10354−82, which is pre-put in special sealed steel container with a capacity of up to 160 DMmade according to normative-technical documentation. A plastic bag sealed by welding, a metal container filled with argon according to GOST 10157−79 to excess pressure not more than 0,07 MPa (0,7 kgf/cm). Lithium ingots are Packed in drums for God.1, manufactured in accordance with the requirements of GOST 5044−79, pour a mixture of melted paraffin according to GOST 23683−89 and drained transformer oil GOST 982−80 in the ratio 1:1. The seams of the drums probailout.

Damn.1

Damn.1

The weight of one ingot of lithium should not exceed 5 kg. net Weight of one piece of product in the party should be no more than 100 kg.

4.2. The surface of the drums, tin plate, coated with vaseline by GOST 5774−76 or other lubricants used for preservation, and packaged in wooden boxes according to GOST 2991−85 or steel drums, the shape and size of which is given in hell.2 and table 2, using as the packaging material of the fabric according to GOST 5530−81 or GOST 30090−93 or parchment GOST 1341−97.

Damn.2

Damn.2

Table 2

Allowed to pack lithium in containers agreed with the customer.

4.1, 4.2. (Changed edition, Rev. N 4).

4.3. For long term storage lithium metal is Packed in reels, manufactured in accordance with the requirements of GOST 5044−79, are placed in steel drums according to claim 4.2. Net weight of one packing place in the party should be no more than 70 kg.

Permitted lithium metal packaging in bags made of polyethylene film GOST 10354−82, which is pre-put in steel drum with a capacity of 100 DMwith a size according to the GOST 5044−79 with a double bottom and the walls of the bag with metal brew, the drum is filled with a mixture of melted paraffin according to GOST 23683−89 and drained transformer oil GOST 982−80.

(Changed edition, Rev. N 2, 4).

4.4. At every place the shipping container must be tagged according to GOST 14192−96 with application of additional data:

names of the metal;

brand lithium;

batch number;

the date of manufacture.

designation of this standard;

manipulation signs: «Protect from heat», «Protect from moisture», «hermetically Sealed package», «Top»;

sign of danger according to GOST 19433−88, class 4, division 4.3.

Identification tags should be protected with plastic covers. For long term storage of the markings on the metal drum is applied a waterproof paint.

4.5. (Deleted. Izm. N 1).

4.6. Li transporterowych all types of transport in covered vehicles, in accordance with the rules of transportation of hazardous cargoes effective for this transport. At the air transport net mass of the goods per package must not exceed 10 kg.

4.7. (Deleted. Izm. N 1).

4.8. Lithium should be stored and kept in warehouses I and II degree of fire resistance at a temperature not exceeding 40 °C and relative humidity not more than 85%. The room should be constantly firefighting and absent water and steam communication. Temporary storage of lithium on the bridges and open areas is prohibited. In the process of storage is necessary at least once a year to make a sample inspection of the containers.

5. MANUFACTURER’S WARRANTY

5.1. The manufacturer guarantees the conformity of lithium present standard requirements provided the consumer observes rules of transportation and storage prescribed by this standard.

Warranty period lithium is set 5 years from the date of manufacture of the product.

6. SAFETY REQUIREMENTS

6.1. In production, selection and cutting of samples, loading, unloading, storage and transportation of lithium metal are required to comply with safety standards in the chemical industry when working with alkali metals.

6.2. Lithium ignites from the water. Work with lithium in the atmosphere of moist air refers to a category of explosive. When burning lithium thick smoke aerosols condensation of lithium and its compounds. The ignition temperature of the lithium in air to 640 °C. the combustion Temperature lithium 1300 °C.

6.3. In the case of fire extinguishing lithium it should be conducted by personnel equipped with insulating oxygen apparatus (type IP-54, KIP-8, etc.).

6.4. To extinguish burning lithium used powdered technical potassium chloride according to GOST 4568−95 the humidity of the powder is not more than 1%, dry graphite powder according to GOST 7478−75, an inert gas (argon) according to GOST 10157−79. When large amounts of burning lithium is necessary to use the car powder extinguishing according to GOST 12.4.009−83.

6.5. Lithium is not volatile and is not dangerous after inhalation injury.

The main danger for the human body are the products of the combustion of lithium, which belong to the class of extremely hazardous compounds (1 class of hazard, GOST 12.1.007−76). The aerosol products of combustion of lithium have a sharp irritant, causing destruction of the mucous membranes of the eyes and respiratory tract, as well as obmetochnymi effect on the body.

The maximum allowable concentration of aerosol products of combustion of lithium 0.02 mg/m.

6.6. It is necessary to control the air of the production zone on the content of aerosols of lithium and its compounds, as well as to take measures for the prevention of pollution lithium external environment: waste water and exhaust air.

6.7. Casting the molten lithium must be made in a steel mold, pre-dried and heated to a temperature of 50−70 °C.

6.8. Under the terms of the transportation of lithium and containers from under him belong to the category of inflammable from water substances. The vehicle must be equipped with fixed or primary fire extinguishing means.

6.9. Clothing and footwear should be issued according to the norms of the USSR State Committee for labour and social Affairs and Presidium of the all-Union Central Council of trade Unions «Typical branch norms of free issue of workwear, footwear and protective equipment».

6.10. When working with molten lithium should apply an additional safety device — a mask-40.

6.11. For respiratory protection in the atmosphere aerosols of lithium and its compounds it is necessary to use dust protection respirator type «petal» according to GOST 12.4.028−76.

6.12. To protect the organs of sight in the atmosphere of aerosols of lithium and its compounds it is necessary to use sealed protective goggles according to GOST 12.4.013−85*.
________________
* On the territory of the Russian Federation GOST R 12.4.013−97.

6.13. In contact with the body of molten lithium, you should immediately remove it with a dry swab, and then within 5−10 min plentifully to wash the affected area with water. After the water treatment the affected area to neutralize 2−3% solution of boric acid or lubricated with ointment against burns, apply a dry dressing and contact the clinic.

6.14. When injected lithium into the eyes, immediately remove it with a cotton swab or cotton cloth, then rinse with a jet of 1−2% boric acid solution or pure water. A stream of water direct from the outer corner of the eye (from the temple) to the inside (toward the nose). Rubbing the eyes should not be.

After first aid the victim should be rushed to medical institution for rendering medical assistance.

APP. (Deleted. Izm. N 1).