Interpretation Response #PI-78-007 ([Brown & Root, Inc.] [Mr. Billy M. Hazlegrove])
Below is the interpretation response detail and a list of regulations sections applicable to this response.
Interpretation Response Details
Response Publish Date:
Company Name: Brown & Root, Inc.
Individual Name: Mr. Billy M. Hazlegrove
Location State: TX Country: US
View the Interpretation Document
Response text:
Mr. Billy M. Hazlegrove
Design Engineer
Marine Technology Development
Brown & Root, Inc.
P.O. Box 3
Houston, Texas 77001
Dear Mr. Hazlegrove:
We are responding to your letter of January 30, 1978, regarding the test pressure required for a gas "pipeline and riser assembly" installed at an offshore platform. As you point out, Section 192.619(a) (2) (ii) would necessitate a higher test pressure for the riser portion of the assembly if a single maximum allowable operating pressure (MAOP) is to be established. It would be incorrect, therefore, to test the whole assembly only to 1.25 times the proposed MAOP.
You indicate that it may be possible to conduct a preinstallation strength test on the riser portion of the assembly so that the pipeline portion would not have to be designed to withstand a higher test pressure. If so, depending on the factual circumstances involved, such a test may be permissible under the provision of Section 192.505(e).
Sincerely,
Cesar DeLeon
Acting Director
Office of Pipeline
Safety Operations