DOT4BW Cylinders


There are many different sizes of cylinders available at KSC/CCAFS. All share a common heritage in with the original NASA-designed 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 local area but can be transported cross-country when required to support NASA missions.

Hydrazine Family Fuel DOT4BW cylinders
Cylinder Size
5-gallon
Model A
30-gallon
55-gallon
(2 models)
120-gallon
(2 models)
Height 24.5" 44.5" 50" or 50.5" 49.5" or 66"
Diameter 12" 18" 22" 36" or 30"
Tare Weight 45 lbs 135 lbs 300 lbs or 405 lbs 760 lbs or 785 lbs
Gross Weight
Full w/N 2 H 4
83 lbs 362 lbs 717 lbs or 822 lbs 1670 or 1695
Fluid Capacity
with 10% ullage
4.5 gallons 27 gallons 49.5 gallons 108 gallons
Quantity -Notes 1 & 2 12 25 5 5
Connections 0.5" KC male
DOT Special Permit
DOT-SP-XXXXX
11378 11378 11173 or 11580 11173 or 11580
MAWP 225 psig 225 psig 300 psig 300 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.
N 2 O 4 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/N 2 O 4
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 -Notes 1 & 2 2 25 5 6
Connections 0.5" KC male
DOT Special Permit
DOT-SP-XXXXX
11580 11383 11580 11580
MAWP 500 psig 300 psig 300 psig 300 psig
Operating Pressure Full vacuum to MAWP
PRV Setting None
Approved Fluids N 2 O 4 and its solutions (blends of N 2 O 4 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).

Note 1: Quantity listed represent total numbers of cylinders in NASA/KSC inventory. Due to maintenance and fleet optimization actual quantity in service is less.

Note 2: 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

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