D.O.T. Hydrotesting

Do you have a RIN (Retesters Identification Number)? Are you able to test low pressure DOT cylinders? The following is a guide to get a RIN number. For further reference refer to CFR 49 Subpart C Section (180.201-180.215). You can order the book or go to the web site. The web site link is on our feedback page.

Steps to obtain an RIN number.

1. Write a letter to the DOT requesting a
Retesters Identification Number. Include a statement as to what type of cylinders you will be testing and what type of testing you will be performing. (Such as: modified hydrostatic testing by proof pressure testing or visual inspection, or full hydrostatic testing in a water jacket.) The letter should be addressed to:

Associate Administrator for Hazardous Materials Safety
U.S. Department of Transportation
Washington, DC 20590-0001

2. You will receive an application form and instructions to have an inspection of your retest facility performed by an independent inspection agency approved by the U.S. Department of Transportation. Upon successfully completing the inspection of your facilities and determination of your qualifications, the inspector will write a report to the RSPA.

3. The RSPA will issue a retesters identification number which is valid for 5 years from the date of issuance, and may be renewed upon application to RSPA. Note: Applications for renewal must be submitted at least 50 days prior to expiration.
The Independent Inspection Agency Report
In order for the RSPA to act favorably on your application for a retesters identification number, you will have to have a letter of recommendation from an independent inspector. Call one or more of the approved inspection agencies and talk to them about conducting an inspection of your facilities. Inquire about the items they will inspect and the cost of the inspection and report.
The following is a list of equipment and documentation which should be in your possession:

1. Your hydrostatic test equipment should be in accordance with the requirements set forth in pamphlet C-1 of the Compressed Gas Association.

2. You must be able to prove the accuracy of the equipment. That is, you must have a calibration system in place. For pressure gauges you can use either a Master gauge or a deadweight tester.

3. It is recommended that you have copies of and be familiar with the latest revision of the following:
CGA C-1 Methods of Hydrostatic Testing of Compressed Gas Cylinders
CGA C-6 Standards for Visual Inspection of Compressed Gas Cylinders
CFR 49 Subpart C Section (180.201-180.215)

Other Considerations

1. Keep written records of all hydrostatic tests. See log sheets in CGA- pamphlet C-1 for examples.
2. All Cylinders subjected to a hydrostatic test should also be given a visual examination. (internal and external)
3. Never attempt to retest a cylinder marked with an "E" number or "SP" number unless, you have a copy of the "Exemption" or "Special Permit". This is the most common citation issued to cylinder retesters by the Enforcement Division of the DOT.

National Fire Protection Association, 1 Batterymarch Park, Quincy, Ma. 02269-9101 PH.800-344-3555
Compressed Gas Association, 1725 SW Jefferson Davis Hwy, Arlington, Va 22202-4102, PH.703-412-0900
Superintendent of Documents , Attn: New Orders, PO Box 371954, Pittsburgh, Pa. 15250-7954, PH. 202-512-1800