Topic: Bellingham - Pipeline Technology (Relief Valve)
NTSB Recommendation: Develop and issue guidance to pipeline operators on specific testing procedures that can be used to approximate actual operations during the commissioning of a new pumping station or the installation of a new relief valve and determine during annual tests whether a relief valve is functioning properly.
PHMSA Action:
Latest PHMSA Response: PHMSA letter to NTSB 11-10-05.
NTSB Status: CAA; 05-03-06
[NOTE: The attached documents are in PDF format, you can download a free viewer. If you have problems accessing the PDFs or the information, report your problem for further assistance.]