SIZE
(in)

DOT
No.

MG
INDUSRIEES

 BOC

AIR
PRODU
CTS

AIR
LIQUID

 SCOTT

 MATHESON

LIQUID
CARBONIC

 HIGH PRESSURE STEEL

9 × 60

3AA2400

300

300

A

49

K

1L

J

9 × 56

3AA2265

200

200

B

44

A

1A

H

3AA2015

8.5 × 31

3AA2015

80

80

C

16

B

2

M

6 × 24

3AA2015

35

30

D1

7

D

3

B

4.5 × 31

3AA2015

E

E

Med. E

Med. E

ER

-

E

4 × 20

3AA2015

10

12

D

3

D

4

D

10 × 56

3AA6000

3 HP

500

BX

44HH

-

1U

-

9 × 55

3AA3500

2 HP

-

BY

44H

-

1H

-

 HIGH PRESSURE ALUMINIUM

10 × 56

3AL2216

265AL

265AL

A(AL)

-

-

-

-

8 × 53

3AL2015

150AL

150A

B(AL)

30AL

AL

1R

AH

7 × 38

3AL2216

80AL

80A

-

-

BL

2R

A2

7 × 21

3AL2216

33AL

30A

D1(AL)

7AL

CL

3R

A3

4.5 × 15

3AL2015

9AL

9A

D1(AL)

-

-

-

-

 LOW PRESSURE STEEL

15 × 56

4AA480

400

-

AA

125

XG

1K

-

15 × 48

4BA240

359

-

A1

110

XL

1F

PC

12 × 48

8AL

380

5

A

70

XF

1B

L5

10 × 53

4BA300

65

55

A3

LP

XP

1J

SC

 NON-RETURNABLE CYLINDERS

2 × 15

3E1800

LB

LB

LB

LB

LB

LB

LB

2 × 16

3E1800

LX

7X

-

LBX

-

7X

RB

4 × 30

39NRC

DE

DE

-

DE

E

-

-

4.2 × 12.5

39NRC

DD

-

-

5EM

D

-

-

9 × 16.5

39NRC

DM3

212L

-

-

Scotty III

-

-

3 × 11

4B240

DM1

-

X100

4D

Scotty II

-

-

4 × 16.25

39NRC

DAL

-

-

8AL

Scotty IV EL

-

-

3 × 10.75

39NRC

DM2

-

-

7EOC

Mini-Mix

-

-

 This chart shows the most common types of cylinders.