Trenchless Pipe Lining

beachbum0286

Has anyone used this method before? I was wondering if it can fix sags in sanitary sewers? Thanks Zach

Gmads

I don't think traditional pipe bursting or pipe lining will fix a sag, but I don't have much experience with it - someone else here may know something different. But interestingly enough I was looking at this site a couple of days ago (www.advancedconstructionproducts.com) at a sewer line sag removal system. I'd be curious to see this in action or to hear any firsthand info.

Vermaraj

The systems I have seen use either air or water pressure to inflate the sleeve and activate an agent that bonds the liner to the pipe. Liner will follow slope of the original pipe.

From experience I can tell you that the liner method works well. We had it subbed out on a large industrial project with 20" concrete waste lines that are scoped 2x annually. Never had any problems with infiltration or leakage.

beachbum0286

Gmads, that sag removal system is pretty neat. The sag we need to remove is in ductile pipe, 22ft deep under 48" storm sewer. The inspectors must have it out for us because the sag is only 1/4 to 1/2 inch.

TMatt142

Liners won't fix a sag, but will prevent the pipe from collapsing. We had a sub come in and line two clay tile sanitary lines. They use some sort of resin with steam ( smelled good!) and it worked very well! That stuff hardens like concrete. Oh and hey.....If the mandrill won't pass......doesn't matter how little of a sag is in the line..

beachbum0286

the mandrill went through fine, the sag was found when the camera was sent through.

jdaviau

There is a company here in South Florida, that injects air or something else under the pipe, to raise the sagging section. What they inject depends on the pipe type and size. I haven't seen them do it, but they have fix a pipe run for us.

Grumpyplumber

For anyone who's ever wondered why plumbers are expensive...click that link.
That thing is impressive, but man, it's almost 6K!
Would come in handy in situations where you don't want to excavate concrete or pavement and you just so happen to get constant calls for sagging underground sewers.

415moto

what exactly is trenchless replacement?

What is the process for it? Ive seen trucks with it advertised and I always wondered about it.

Nacho

Hello all, Im responding to to the statements about pipeline sag-removal---1st, you cant remove a pipeline sag with a liner. A good sag mechine works with the use of air. Most companys that preform sag removal almost all use the same equipment. I know this because I have one. And in order to know weather you can or cant remove the sag you must first know the type of bedding used around the pipe. 2nd the water table, A high water table well help the pipe to rise when to start up your equipment.3rd howdeep is the pipeline. The deeper the pipe the harder its going to be to remove the sag. I have been removeing pipeline sags for over 5 years now and have learned alot in this area. along with rerounding and pipelining. If you should need some info on this subject please feel free to contact me at nacho2operate@gmail.com I travel all over the country working on pipeline sags and rerounding.

dayexco

i just dig em up

__________________
someday, i'll be as patient as Nick.

Dozerman56

Wow. 1/4 to 1/2"? What does the project specification say about tolerances? If it's not addressed, does the owner's standards book say anything about out of alignment? Failing that, OK guys, survey time, what's industry standard? I'd do a lot of research and probably demand they recalibrate their camera before I broke ground on any kind of repair for this non problem.

Nacho

More often than not if a sag is a 1/2 inch and less than 2foot long most inspectors wont even mention it in there reports. But a sag of this type can be removed by sending a rerounder through the line. Just slow the movement of the rerounder in the area of the sag. I have removed sags up to 10 feet long and 1inch deep useing a rerounder.

Cairncross

More often then not, the company selling this kind of service has worked-out a pricing strategy that charges you for the convenience of not digging it up.
The cost is typically just low enough to keep you from digging it up

__________________
wardellbuilders.com

dayexco

not when you live in south dakota...i can do a LOT of digging for mobilization costs alone. besides...if installed properly, you shouldn't have sags to beging with. i or my son watch every pipe being laid. and it's always been our opinion, the pipelayer should be the highest paid man on a pipe crew...

#1..he dictates the pace of the crew. you can have the nicest, newest, most productive equipment in the world...if you have a pooch in the ditch, it doesn't mean too much

#2.. the quality of what he does dictates whether you need the services of the pipe unsagger, or dig it up

__________________
someday, i'll be as patient as Nick.

rino1494

Looking for a new pipe layer Gene ??

__________________
Life is hard. It is harder when you are stupid

Uncle Sam wants YOU....to speak ENGLISH

PipeGuy

Some years back I went to work for a guy and one of the first things I did was restructure a pay scale that had been in place for generations. The restructuring included paying pipelayers an hourly wage that was only slightly little less than hoe operators (historically the highest paid hourly guy on the crew) and implementing a "per foot" bonus for flawlessly laid pipe that would, in the best instance, net them out at an hourly rate equal to that of the hoe operator. While it was received by most with considerable objection it had the desired effect - "re-work" costs declined dramatically; far in excess of the bonus expense.

A good pipelayer is priceless and should be paid accordingly. I've gone as far as to have one on salary.

__________________
Fortunately I keep my feathers numbered for...for just such an emergency. -Foghorn Leghorn

Nacho

Gene, where are you located.....I have been in the field going on 30 years now, I lay pipe ! repair ours pipelines ! also install pipeliners and do rerounding and sag-removal on others pipeline work.

Nacho

[quote=Cairncross;1121240]More often then not, the company selling this kind of service has worked-out a pricing strategy that charges you for the convenience of not digging it up.
The cost is typically just low enough to keep you from digging it up [/quote

Thats just how it works it will take you an operator a pipelayer and an excuvator to dig up and repair a sag... along with the cost back fill material and or repaveing.. I come in with none of these cost and charge you 2/3s of that cost and do the job in 1 to 2 days and leave. It pays to have a good pipelayer.