Parameter: Standard: IEC376-71 Sulfur hexafluoride (SF6) % : 99. 9 min Air% : 0. 03 max Carbon Tetrafluoride (CF4) % : 0. 04 max Moisture / ppm: 3 max Acidity (as HF) / ppm: 0. 3 max Hydrolyzable Fluoride (as HF) / ppm: 0. 5 max Mineral Oil / ppm: 4 max Toxicity: Non-toxic Packing: Cylinder (50kg SF6 gas in a cylinder) Specification SerialTypeNominalWaterNominalDesignlengthWeightMaterialCarry outNoworkingtestVolumeOuterWallforstandardPressurePressureDiaThicknesscylinder1CNP20-40-279A2033.4407.62798905630CrMoGB172582CNP20-50-279A2033.4507.6108066.530CrMo3CNP20-60-279A2033.4607.612707730CrMo4CNP20-70-279A2033.4707.6146087.530CrMo5CNP20-80-279A2033.4807.616509830CrMo6CNP20-90-279A2033.4907.61840108.530CrMo7CNP20-30-232A2033.4306.42329604430CrMo8CNP20-40-232A2033.4406.4122053.530CrMo9CNP20-50-232A2033.4506.414806430CrMo10CNP20-55-325A2033.4559.032595578.530CrMo11CNP20-60-325A2033.4609.0102083.530CrMo12CNP20-65-325A2033.4659.010908930CrMo13CNP20-70-325A2033.4709.011509430CrMo14CNP20-80-325A2033.4809.0127010530CrMo15CNP20-90-325A2033.4909.0142011630CrMo