SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
(OP)
HI ALL.
IT'S MY PLEASURE TO JOIN THIS EXPERTISE FORUM.
i am not sure is my question in the right place or not.
I experince lately a frequent fialure of piping just below the ground surface and it threathens the plant operation. it would be appreciated if i can get help of how to inspect and repair.
thanks
IT'S MY PLEASURE TO JOIN THIS EXPERTISE FORUM.
i am not sure is my question in the right place or not.
I experince lately a frequent fialure of piping just below the ground surface and it threathens the plant operation. it would be appreciated if i can get help of how to inspect and repair.
thanks





RE: SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
RE: SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
What kind of pipe are you using. If steel - I am guessing rust!!
RE: SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek
RE: SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
BigInch is typically pinpointing our case which we got severe corrosion at that area and mostly found as exteranlly attacking all round the pipe just like a wide ring or corrosion.
normally, we used expoxy wrap during installation 20 years back, the time comes to have more effective protection. if any body can help of which protection would be more more effective for external protection.
RE: SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
See what you think of these,
http://solutions.3m.com/wps/portal/3M/en_EU/Corros...
"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek
RE: SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
2 part eopxy - such as SPC or Denso. These would be best. Only thing is they are not UV resistant, so at the interface and where the come above ground wrap over them with any UV resistant coating, or paint over with a UV resistant topcoat. If not covered, these will generally chalk at about 1 mil per year.
Vicous-elastic coating such as Viscotaq or Stopaq - wrap like a tape, but at soil to air interface where there are a lot of soil stresses highly recommend to put their outer composite wrap over top of this to help stop any movement / resist soil stresses
If you must use a tape wrap, then I recommend you look at Polyguard UV 350 or Tapecoat H50. These tapes are UV resistant, thicker, and resist soil stresses much better than a regular tape. You could go cheap and use a different tape, but if you do you will want to put the outer fiber wraps (example Denso Fiber-wrap) over top to resist soil stresses, coating movement (these wraps typically cure in water and are expensive, so you won't really save much money using a tape). If you use a tape remember to always wrap from the bottom going up, this way the overlaps face down and don't trap water.
You could even use shrink sleeves if you wanted to, most are UV resistant. Not the best for this application.
Remember anything but the eopxy is going to shield CP. I always recommend the eopxy first.
Proper surface preparation is the key, don't just stip the old coating and put the new coating on.
RE: SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION
RE: SOIL-AIR INTERFACE COOLING WATER PIPING CORROSION