Serial Number Prefixes of SCUBA Cylinders

US / Canadian Cylinders
Note: The current serial number prefix system was implemented in 1993. Cylinders manufactured prior to September 1993 did not have serial number prefixes specific to the different cylinder types. The serial number prefixes of these cylinders began with “A” through “D”.

3000 psi SCUBA Cylinders

Part
Name

S/N
Prefix

Fill

S/P
(psi)

Capacity
(cu ft)

S6

BV

AIR

3000

6.0

S13

AZ

AIR

3000

13.0

S17

AY

AIR

3000

17.0

S19

CB

AIR

3000

19.0

S30

BS

AIR

3000

30.0

S40

BI

AIR

3000

40.0

S53

AX

AIR

3000

53.0

S63

BJ

AIR

3000

63.1

S67

AR

AIR

3000

67.0

S80

AS

AIR

3000

77.4



3300 psi SCUBA Cylinders

Part
Name

S/N
Prefix

Fill

S/P
(psi)

Capacity
(cu ft)

C60

CE

AIR

3300

60.0

C80

T

AIR

3300

77.4

C100

AA

AIR

3300

100.0

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