Interpretation Response #PI-70-0101 ([Williams Brothers Engineering Co.] [Mr. C.C. McClure])
Below is the interpretation response detail and a list of regulations sections applicable to this response.
Interpretation Response Details
Response Publish Date:
Company Name: Williams Brothers Engineering Co.
Individual Name: Mr. C.C. McClure
Location State: OK Country: US
View the Interpretation Document
Response text:
PI-70-0101
June 30, 1970
Mr. C.C. McClure
Williams Brothers Engineering Co.
National Bank of Tulsa Building
Tulsa, Oklahoma 72103
Dear Mr. McClure:
This is in response to your letter of June 5, 1970, requesting interpretation of Section 195.124 dealing with the design of closures.
The section in question states that the pressure rating of the closure must be at least equal to the pressure rating of the pipe to which it is attached. Another way to state this would be that the pressure used in the design of the closure, on which the pressure rating of the closure is based, must be at least equal to the design pressure of the pipe to which it is attached.
In the examples set forth in your letter of June 5, 1970, the closure is rated at 1440 psig. If the design pressure of the pipeline is 1400 psig, then both your example b end c, would meet the intent of the regulations, since in both examples, the design pressure of the pipe is 1400 psig and the closure rating is "at least equal" to this pressure.
Please contact me if I can be of any further assistance in this matter.
Sincerely,
Signed
Frank E. Fulton
Chief, Technical Division
Office of Pipeline Safety