Support For Catalina Cylinders Clientele

The Department of Transportation (DOT) and Transport Canada (TC) require that a cylinder made in compliance with their specifications be marked on the crown with certain information. Over the years the format used by Catalina Cylinders and Catalina East Division to display these markings has changed a few times. Shown below is an example of the current crown marking stamped on the standard industrial gas I150 cylinders (150 cuft 2015 psi) manufactured by Catalina Cylinders, Garden Grove, CA. Under the example of crown marking is a list of each of the specific crown markings followed by a brief explanation of that marking. The information provided by the markings is the same, regardless of the different stamping formats used by Catalina Cylinders and Catalina East Division over the years.

Example of crown marking of an “I150” cylinder manufactured at Catalina Cylinders:

DOT-3AL2015..EBXXXXXXX M4002 07C08 I150 U18 TC-3ALM139

Marking		Description
DOT-3AL		The U.S. regulatory authority, the Department of Transportation (DOT), and specification, 3AL, to which the cylinder is manufactured in compliance(required mark).
2015		The service pressure “2015”, in pounds per square inch (psi), of the cylinder (required mark).
EBXXXXXXX		The serial number of the cylinder. The serial number prefix of “EB” is specific to the 150 cuft 2015 psi industrial gas cylinder, manufactured at Catalina Cylinders, Garden Grove, CA facility, followed by a seven digit number (required mark).
M4002		The DOT Manufacturers Number (M-Number) “M4002” issued to Catalina Cylinders, Garden Grove, California facility (required mark).
07C08		The original hydrostatic test date of the cylinder, month “07” followed by the year “08“, performed at the time of manufacture of the cylinder. The “C” represents the symbol of the Independent Inspection Agency (IIA) performing the inspection of and certifying the acceptance of the cylinder at the time of manufacture(required mark).
CATALINA		The name of the manufacturer of the cylinder.
I150		The cylinder identifier. Identifies the cylinder is designed for the industrial gas service “I” a capacity of 150 cuft “150” of gas charge, hence I150.
U18		The cylinder outlet thread designation as specified in CGA TB-16.
TC-3ALM		The Canadian regulatory authority, Transport Canada “TC”, and specification “3ALM”, to which the cylinder is manufactured in compliance (required mark).
139		The service pressure “139” (in bars) of the cylinder (required mark).

Catalina Cylinders recommends the following procedure for the valving of industrial gas cylinders.

1. 1. Inspect the inlet and outlet threads of the valve and the threads and o-ring
      gland of the cylinder for damage to the threads and o-ring area. If either
      the valve or cylinder has damage to the threads or the o-ring area, do not
      insert the valve into the cylinder.
   2. Inspect the cylinder threads and the cylinder internally verifying that
      the cylinder is free from any lubricants and contaminants. Do not proceed
      if you feel the cylinder may be contaminated.
   3. Catalina Cylinders recommends the insertion of a new buna-N o-ring when
      the old o-ring shows any sign of tearing or wear.

1. 1. Catalina Cylinders has found it easiest to place the o-ring on the valve
      and then insert the valve into the cylinder tightening the valve hand tight.
   2. Final tightening of the valve should be done with a calibrated torque wrench
      to the recommended torque value noted below:

1. Close the valve with no more than 1 lbf – ft torque.
2. Do not tamper with the safety device of the valve. The safety device of
   the valve should be rated at the test pressure of the cylinder.
3. Whenever replacing the safety device of a valve, Catalina Cylinders recommends
   that you always replace the safety device with a complete new safety device
   assembly.
4. Always verify that the cylinder is empty prior to attempting to replace
   the safety device of a valve.

Catalina Cylinders recommends the following procedure for the valving of industrial gas cylinders.

1. Inspect the inlet and outlet threads of the valve and the threads and o-ring gland of the cylinder for damage to the threads and o-ring area. If either the valve or cylinder has damage to the threads or the o-ring area, do not insert the valve into the cylinder.
2. Inspect the cylinder threads and the cylinder internally verifying that the cylinder is free from any lubricants and contaminants. Do not proceed if you feel the cylinder may be contaminated.
3. Catalina Cylinders recommends the insertion of a new buna-N o-ring when the old o-ring shows any sign of tearing or wear.

2. Catalina Cylinders has found it easiest to place the o-ring on the valve and then insert the valve into the cylinder tightening the valve hand tight.
3. Final tightening of the valve should be done with a calibrated torque wrench to the recommended torque value noted below:

1. Close the valve with no more than 1 lbf – ft torque.
2. Do not tamper with the safety device of the valve. The safety device of the valve should be rated at the test pressure of the cylinder.
3. Whenever replacing the safety device of a valve, Catalina Cylinders recommends that you always replace the safety device with a complete new safety device assembly.
4. Always verify that the cylinder is empty prior to attempting to replace the safety device of a valve.