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Interpretation Response #07-0217 ([Advance Engineered Products, Ltd.] [Mr. Rattan Bahia])

Below is the interpretation response detail and a list of regulations sections applicable to this response.

Interpretation Response Details

Response Publish Date:

Company Name: Advance Engineered Products, Ltd.

Individual Name: Mr. Rattan Bahia

Country: CA

View the Interpretation Document

Response text:

February 25, 2008

Mr. Rattan Bahia

Advance Engineered Products, Ltd.

144 Henderson Drive,

Regina, SK. Canada S4N 5P7

Ref. No. 07-0217

Dear Mr. Bahia:

This responds to your November 15, 2007 letter and follow-up telephone conversations requesting clarification of the general design requirements for structural integrity of specification DOT cargo tank motor vehicles under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Your questions are paraphrased and answered as follows:

Q. May the test in § 178.347-1(d)(9)(iv) pertaining to evaluating the strength of a weld seam in a bulkhead be used to satisfy the requirements for calculating the maximum design stress of a cargo tank specified in § 178.345-3(a)(3)?

A. No. The physical test required to determine the strength of a weld seam in a bulkhead under § 178.347-1(d)(9)(iv) in and of itself is not appropriate for the calculation of the maximum design stress for conditions described in paragraphs (b) and (c) of § 178.345-3.

Q. Is § 178.345-3(b) applicable only to cargo tanks that are designed, constructed, and certified to Section VIII of the ASME Code?

A. No. Section 178.345-3(b) applies to all cargo tanks built to Specification DOT 406, DOT 407, and DOT 412 requirements.

I hope this information is helpful. Please contact us if you require additional assistance.


John A. Gale

Chief, Standards Development

Office of Hazardous Materials Standards

178.345-3, 178.347-1

Regulation Sections

Section Subject
178.345-3 Structural integrity
178.347-1 General requirements