FBE or Yellow Jacket
FBE or Yellow Jacket
(OP)
I am having some hard time justifying the selection of FBE coating system for diluent (diesel) and natural gas pipeline. These are 6” and 16” respectively. Operating temperatures are around 40 and 60C. Client is insisting on YJ for normal and YJ2K for crossing while I suggested Dual layer FBE (anti Corrosion + protective coat) and Dual layer FBE (anti corrosion + abrasion resistant overcoat) for crossings. These are System 2A and 2B respectively in CSA Z 245.20. The lines will have a cold bending out in the field and maximum would be 5D. Can someone suggest some rationales why one is better than the other under these circumstances? Soil could be slightly damp at some points but not very damp. There is a small hill too on the right of way. Burial depth is around 1.5 meters. There is no HDD on the right of way. Few road crossings and one small creek.
Please advise
Please advise





RE: FBE or Yellow Jacket
you must get smarter than the software you're using.
RE: FBE or Yellow Jacket
I think I know what you mean, but it is much better to assume responders don't know what your particular abbreviations and systems are than assume we do.
what are these additional coats on to of the FBE? The description is rather vague.
The issue with coatings is that if you prepare the base of the trench and supervise every last spoonful of back fill then anything is good enough. It sounds to me like your client has seen the reality maybe a little more often than you might have which is that neither is ever perfect, the contractor will often backfill even if you've told him not to unless some inspector is there to maintain progress and all it take sis one area of damage on a pipeline to create a hole.
Sure you'll have CP (I hope) and the ground may not be too bad, but for a line to last 25 years plus, what is the cost difference between the two spread over that sort of timescale?
BTW you can't cold bend to 5D or maybe you mean this is the smallest diameter hot bend - not clear.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: FBE or Yellow Jacket