Sulfur hexafluoride

Summary：Sulfur hexafluoride is a colorless, odorless, non-toxic and non-corrosive compound. At normal temperature, it is gaseous and non-flammable gas, and it is a non-metallic oxide with good chemical stability. Due to its excellent chemical and thermal stability, it will not be decomposed at 500℃ under the condition of ensuring purity. Because of its excellent insulation performance and arc reduction ability, even in the arc instantaneous decomposition, ionization, but also can be quickly restored to the original stable state after arc reduction, so the use of its high chemical stability and excellent electrical insulation characteristics, widely used with the electrical industry and ultra-high voltage insulation materials. In addition, it has the characteristics of large heat transfer coefficient and good cooling effect.

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Description

Sulfur hexafluoride is widely used as insulating material and arc reducing medium of high and medium voltage electrical equipment. Antioxidant, weather tracer, refrigerant and heat carrier for metal smelting and manufacturing process. An insulating gas used in medicine for X-ray devices. It can also be used for basic scientific research of monocrystalline silicon.

Comet

specification	Implementation standard	Maximum pressure	SF6 Filling weight (Unit :kg)
4LSeamless cylinder	GB5099-94	12.5MPa	5
6LSeamless cylinder	GB5099-94	12.5MPa	8
8LSeamless cylinder	GB5099-94	12.5MPa	10
10LSeamless cylinder	GB5099-94	12.5MPa	12
12LSeamless cylinder	GB5099-94	12.5MPa	15
15LSeamless cylinder	GB5099-94	12.5MPa	20
25LSeamless cylinder	GB5099-94	12.5MPa	30
40LSeamless cylinder	GB5099-94	12.5MPa	50
43.3LSeamless cylinder	DOT3AA	2265Psi	50
48.8LSeamless cylinder	DOT3AA	2400Psi	50
500Welded cylinder	GB5100-2011	12.5MPa	600

Items		IEC60376(2005)	Index （GB/T12022-2014）	Enterprise internal control sulfur hexafluoride index
(SF6) Sulfur Hexafluoride purity (mass fraction)/10^-2 ≥		99.7	99.9	99.997
Air content（Mass fraction）/10-6 ≤		2000	300	10
CF4 Carbon Tetrafluoride content（Mass fraction）/10^-6 ≤		2400	100	1
C2F6 Hexafluoroethane content（Mass fraction）/10^-6 ≤		/	200	20
Octafluoropropane (C3F8) content（Mass fraction）/10^-6 ≤		/	50	1
Moisture content of H2O	Mass fraction/10^-6 ≤	25	5	2
Moisture content of H2O	Dew Point Dew point/℃ ≤	-36.0	－49.7	－49.7
Acidity(in HF) （Mass fraction）/10^-6 ≤		1.0	0.2	0.1
Acidity(in HF) （Mass fraction）/10^-6 ≤		1.0	0.2	0.1
Fluoride Hydrolysable Fluoride (in HF) content（Mass fraction）/10^-6 ≤		/	1	0.2
Mineral oil content（Mass fraction）/10^-6 ≤		10	4	2
Toxicity test		Non-toxic	Non-toxic	Non-toxic
Remarks	Inspection basis：GB/T12022-2014