HDD River Crossing Design Factor
HDD River Crossing Design Factor
(OP)
I have a good program to design a steel pipeline HDD crossing of a waterbody, which considers the summation of all installation stresses and gives a thumbs up/thumbs down. My question is: What is the Design Factor (F) used to calculate operating MAOP/hydrotesting, once successfully in place and tied in. I looked at ASME B31.8 and it didn't specifically mention HDD crossings; just class locations, fab assemblies, , stations, etc.





RE: HDD River Crossing Design Factor
try:
TITLE 49--Transportation
Subtitle B--OTHER REGULATIONS RELATING TO TRANSPORTATION
CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
SUBCHAPTER D--PIPELINE SAFETY
PART 192--TRANSPORTATION OF NATURAL AND OTHER GAS BY PIPELINE: MINIMUM FEDERAL SAFETY STANDARDS
at:
h
good luck!
-pmover
RE: HDD River Crossing Design Factor
I understand you're saying that once the HDD is installed and tied in, it's just like the pipeline itself regarding the D.F. using P=2ST/D *FET. Best Regards.