wrapping and coating of under ground pipelines
wrapping and coating of under ground pipelines
(OP)
Hi guys,
How to confirm whether wrapping and coating is required or cathodic protection is required for a under ground pipeline.
regards
Ashok
How to confirm whether wrapping and coating is required or cathodic protection is required for a under ground pipeline.
regards
Ashok





RE: wrapping and coating of under ground pipelines
As to cathodic, there are generally regulatory requirements for protection. For pipe that doesn't come under a regulatory requirement, company policies often require protection. Absent that, then it comes down to engineering judgement. I operated a non-regulated gathering system for a company without a policy. I looked at the protected pipelines in the area and opted for not installing cathodic protection, but I required test leads to be attached to any steel pipe that crossed someone else's steel pipe. I had those test leads evaluated annually and never had a stray current problem--maybe because of the quality of my coatings? If I had it to do over I would make the same call.
David
RE: wrapping and coating of under ground pipelines
zdas, The lack of corrosion may have had something to do with the remoteness of the typical unregulated gathering system and perhaps also a soil with low activity levels. My old system didn't have one high voltage wire within 50 miles of it.
I would recommend that BEFORE you make a decision about about how you will handle corrosion, or not handle it at all, it would be far better to do a stray current survey and have your soils along the route analyzed too. Nothing worse than finding out after only a short time that what you thought was your steel pipe really looks more like the kitchen sponge. If you need some ideas about how to do that, contact these guys http://www.corrpro.com/
"We have a leadership style that is too directive and doesn't listen sufficiently well. The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.liv
RE: wrapping and coating of under ground pipelines
RE: wrapping and coating of under ground pipelines
"We have a leadership style that is too directive and doesn't listen sufficiently well. The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward CEO BP
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.liv
RE: wrapping and coating of under ground pipelines
However, I deal mostly with water resources projects and rarely see cathodic protection being used. Wrapped, bagged, coated, bonded joints maybe and sometimes test stations for the larger, higher risk projects - but CP is probably only used in about 0.01% of public - water resources projects (at least in the western US).
RE: wrapping and coating of under ground pipelines
Steve Jones
Materials & Corrosion Engineer
http://www.oilandgaspeople.com/cv/11499664
http://www.linkedin.com/pub/8/83b/b04
RE: wrapping and coating of under ground pipelines
Thank you guys for your prompt replies.
Regards
Ashok