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DOT 4BW CYLINDERS

There are many different sizes of cylinders available at KSC/CCAFS. All share a common heritage in with the original NASA-designated 30-gallon fuel version. DOT4BW refers to the Department of Transportation design specification under which these containers fall. They are all similar to a propane tank. All are covered by various exemptions to existing DOT specifications primarily due to being constructed of 304L stainless steel - which is not currently an authorized material for this classification of containers.

The KSC/CCAFS cylinder fleet normally stay in our area but can be transported cross-country when required to support NASA missions. Additional 55 and 120 gallon cylinders are available from DESC DFSP and are routinely available to all NASA, DOD and commercial programs at KSC/CCAFS.

Hydrazine Family Fuel DOT4BW cylinders
Cylinder Size
5-gallon
Model A
30-gallon
35-gallon
55-gallon
(2 models)
120-gallon
(2 models)
Height 24.5" 44.5" 39" 50" or 50.5" 49.5" or 66"
Diameter 12" 18" 22" 22" 36" or 30"
Tare Weight 45 lbs 135 lbs 265 lbs 300 lbs or 405 lbs 760 lbs or 785 lbs
Gross Weight
Full w/N2H4
83 lbs 362 lbs 530 lbs 717 lbs or 822 lbs 1670 or 1695
Fluid Capacity
with 10% ullage
4.5 gallons 27 gallons 31.5 gallons 49.5 gallons 108 gallons
Quantity 12 25 4 100+ 60+
Connections 0.5" KC male
DOT Special Permit
DOT-SP-XXXXX
11378 11378 11580 11173 or 11580 11173 or 11580
MAWP 225 psig 225 psig 300 psig 300 psig or 500 psig 300 psig or 500 psig
Operating Pressure Full vacuum to MAWP
PRV None
Approved Fluids Hydrazine family fuels and their solutions
Other Features Built-in dip leg. Normally place cylinder on scale to determine content.
N2O4 oxidizer DOT4BW cylinders
Cylinder Size
5-gallon
Model C
30-gallon
55-gallon
120-gallon
 
Height 23.5" 40.5" 60.5" 68.5"  
Diameter 12" 21" 20.5" 30"  
Tare Weight 93 lbs 340 lbs 465 lbs 835 lbs  
Gross Weight
Full w/N2O4
147 lbs 665 lbs 1,062 lbs 2,139 lbs  
Fluid Capacity
with 10% ullage
4.5 gallons 27 gallons 49.5 gallons 108 gallons  
Quantity 4 25 10+ 15+  
Connections 0.5" KC male 0.5" KC male 0.5" KC male 0.5" KC male  
DOT Special Permit
DOT-SP-XXXXX
11580 11383 11580 11580  
MAWP 500 psig 300 psig 500 psig 500 psig  
Operating Pressure Full vacuum to MAWP
PRV Setting None
Approved Fluids N2O4 and its solutions (blends of N2O4 and nitric acid in water)
Other Features Built-in dip leg. Normally place cylinder on scale to determine content. The lid is removable to reduce weight by 53 lbs during operations (must be in place for transport).


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