Rob Roy rigid conduit

[bobbymari]

Anyone familiar in bending methods of Rob Roy type coated rigid pipe or are there any? City calling for this pipe and we will need a few offsets. I've used it but only for stub ups never had to put a bend in it, if to big of a deal they'll just have to let me go with rigid I can bend and wrap with 50 kcmil tape

 

[don_resqcapt19]

You can often bend it with the next larger size shoe or bender. If you are using a bender where the pipe slides on a fixed part of the bender, you may have to do something to make sure that the fixed part of the bender does not dig into the coating on the pipe.

 

[bobbymari]

You can often bend it with the next larger size shoe or bender. If you are using a bender where the pipe slides on a fixed part of the bender, you may have to do something to make sure that the fixed part of the bender does not dig into the coating on the pipe.

actually shouldve posted question better, yea I know about larger shoe actually lookin for tips to avoid digging into coating thanks

 

[masterinbama]

On a bender without rollers like a chicago, I split a larger piece of pipe and make a saddle for the Rob Roy to nest in.

I might add if you own a 300 or 535 style machine spend the money for the 3 jaw chuck inserts for it. They will save you tons of money not having to repair the coating. RIDGID part # 97365 about $130.

 

[bobbymari]

On a bender without rollers like a chicago, I split a larger piece of pipe and make a saddle for the Rob Roy to nest in.

I might add if you own a 300 or 535 style machine spend the money for the 3 jaw chuck inserts for it. They will save you tons of money not having to repair the coating. RIDGID part # 97365 about $130.

thanks gonna try these

 

[eHunter]

A few links with tips and tricks about working Robroy.
I have found that bends in larger diameter Robroy over 3" and greater than 45 degree bends are very difficult without wrinkling the tubing and or destroying the coating even with a chicago style bender. Carefully selected diameters and lengths of PVC conduit split lengthwise makes some cheap and easy protective shims or jaws to be used with clamps, wrenches and benders. When using benders use a suitable larger shoe to fit the outer diameter of the shim. This usually works reasonably well without damaging the coating. Working Robroy in cold temps seems to make the coating more easily damaged. Pre-formed ells and offsets are available from Robroy. Touchup coating is also available, but it is not cheap.
For me it takes a buttload of patience and a lot of good luck.
Good luck and let us knoiw how it works out.

http://www.plastibond.com/Products.cfm written instructions are in the catalog near the end.
http://www.plastibond.com/installation.cfm video
http://www.ien.com/article/correct-installation-pvc/7630
http://ecmweb.com/content/pvc-coated-conduit-and-fitting-installation-practices

 

[bobbymari]

A few links with tips and tricks about working Robroy.
I have found that bends in larger diameter Robroy over 3" and greater than 45 degree bends are very difficult without wrinkling the tubing and or destroying the coating even with a chicago style bender. Carefully selected diameters and lengths of PVC conduit split lengthwise makes some cheap and easy protective shims or jaws to be used with clamps, wrenches and benders. When using benders use a suitable larger shoe to fit the outer diameter of the shim. This usually works reasonably well without damaging the coating. Working Robroy in cold temps seems to make the coating more easily damaged. Pre-formed ells and offsets are available from Robroy. Touchup coating is also available, but it is not cheap.
For me it takes a buttload of patience and a lot of good luck.
Good luck and let us knoiw how it works out.

http://www.plastibond.com/Products.cfm written instructions are in the catalog near the end.
http://www.plastibond.com/installation.cfm video
http://www.ien.com/article/correct-installation-pvc/7630
http://ecmweb.com/content/pvc-coated-conduit-and-fitting-installation-practices

thanks to all will post how it went when completed. also how much was wasted:happysad::slaphead:

 

[petersonra]

Unless you are going to do a lot of it, your best bet might be to forgo bending as much as possible by using pre-made pieces.

You can also coat them yourself if you want, or send in pieces to get coated, but that is not something you might want to do.

Incidentally, while it is not exactly on topic, I have been told that there are some people using heat shrink tubing as a covering for this type of application. Just slide it on after the fact and shrink it.

 

[eHunter]

Unless you are going to do a lot of it, your best bet might be to forgo bending as much as possible by using pre-made pieces.

You can also coat them yourself if you want, or send in pieces to get coated, but that is not something you might want to do.

Incidentally, while it is not exactly on topic, I have been told that there are some people using heat shrink tubing as a covering for this type of application. Just slide it on after the fact and shrink it.

I believe you are referring to products from Raychem. This product has a fairly good track record of subterranean pipe corrosion control and has been successfully used by utilities and the oil and gas industry for years.
https://www.google.com/search?num=1...2-4j2j2.8.0.les;..0.0...1c.1.6.hp.MAPlwhFA_50

 

[Cmdr_Suds]

Check with the local rep and see if they give special training. I was involved with a project years ago and got sent to their plant for a tour. If I remember correctly, they have benders they would be more than willing to sell you.