TECHNICAL LIQUID OXYGEN

GOST 6331-78 (CN of FEA code 280 440 0000)

Liquid oxygen is co-product of receiving of liquid nitrogen from atmosphere air by low-temperature rectification technique. It is applied after its gasification for flame machining of metals and other technical purposes.

Specifications	Commercial-Grade Oxygen		Medically pure oxygen
	First Grade	Second Grade
Volume fraction of oxygen, % no less than	99,7	99,5	99,5
Acetylene content	Non-availability
Carbon dioxide volume in 1 dm3of liquid oxygen, sm3 at 20 ºС and 101,3 Kpa (760 mm hg.), no more than	2,0	3,0	3,0
Oil content	Non-availability
Carbon dioxide content	Unnormalized		Must pass the test by i. 3.6
Gaseous acid and alkalis content	Unnormalized		Must pass the test by i. 3.7
Content of ozone and other gases-oxygen carriers	Unnormalized		Must pass the test by i. 3.8
Content of moisture and mechanical impurities	Must pass the test by i.3.9 test
Odour	Unnormalized		Non-availability

Safety Requirements: liquid oxygen is non-toxic, incombustible, in explosive, however, being a strong oxygen carrier it abruptly increases ability of other materials combustion. Wood, paper, asphalt, carbon saturated by liquid oxygen have ability to detonate. In a case of contact with open parts of skin it causes freezing injury and afflicts the conjunctiva.

Packaging: filled in special, cryogenic and motor-vehicle tanks assigned for storing and trucking of cryogenic products. The unloading is carried out in specially designated places.

Transportation: by all modes of transport (railroad, motor-vehicle) in accordance with traffic activity regulations of dangerous goods. During transportation the cisterns which are filled by liquid oxygen have to be fixated so it can not shift and don’t expose to impacts. Cryogenic vessels are transferred in vertical position.