Interpretation Response #12-0236 ([Dynetek Industries Ltd.] [Mr. Stefan Frey])
Below is the interpretation response detail and a list of regulations sections applicable to this response.
Interpretation Response Details
Response Publish Date:
Company Name: Dynetek Industries Ltd.
Individual Name: Mr. Stefan Frey
Country: CA
View the Interpretation Document
Response text:
December 18, 2012
Mr. Stefan Frey
Head of Service and Systems Management
Dynetek Industries Ltd.
4410 46 Avenue SE
Calgary, AB T2B 3N7
Canada
Ref. No.: 12-0236
Dear Mr. Frey:
This is in response to your October 23, 2012 email requesting clarification of the requirements for filling DOT specification cylinders under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically you asked if a cylinder may be filled in excess of the marked service pressure.
A cylinder may be filled to a pressure in excess of the marked service pressure (1) in accordance with § 173.302a(b); or (2) to compensate for certain factors, such as heat of compression, high ambient temperature, or changes in elevation, provided the pressure in the cylinder at 21°C (70 °F) does not exceed the marked service pressure. Except as otherwise provided in § 173.301a(d), the pressure in a cylinder may not exceed 5/4 times the service pressure at 55 °C (131 °F).
I hope this information is helpful. If you have further questions, please do not hesitate to contact this office.
Sincerely,
Delmer Billings
Senior Regulatory Advisor
Standards and Rulemaking Division
173.302a