PVC heating box/blanket manufacturer

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Please remember that the OP was specifically asking about manufacturered heat blankets. I posted my pic simply to bring a smile to everyone's morning. I suspect the torch pic was posted in a similar humor.

We've hashed out the 'identified' issue in other threads, and I see no reason to revisit it here.

Has anyone tried cooking lunch with a 'hotbend?' :D
 
iwire said:
In my opinion a homemade PVC bender is an NEC violtion.
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The manufacturers bought & paid for that section of code. I have done hundreds of bends with heat guns & torches that met the radius guidelines with no kinks or burns. None of big brother's business how I did it.
 
jmellc said:
The manufacturers bought & paid for that section of code. I have done hundreds of bends with heat guns & torches that met the radius guidelines with no kinks or burns. None of big brother's business how I did it.
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Are you surprised they have not made a bender for flexible conduits also? And require all field bends use such a device?
 
iwire said:
In my opinion a homemade PVC bender is an NEC violtion.
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hey! that ammo can is clearly identified for the purpose.....:happyyes:

"Field bends shall be made only with bending equipment identified for the purpose."

it doesn't say a manufactured device. it says equipement identified for the purpose.

so, stencil "conduit bender" on the ammo can, and let's move on.....
actually, if you had steel skate wheels on an ammo can..... just like a manufactured
bender, charcoal would be an excellent source of heat....

anyone remember the ethylene glycol bazooka benders? greenlee used to make them...
 
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iwire said:
In my opinion a homemade PVC bender is an NEC violtion.
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If the installer has used a homemade heater will you as an inspector fail the inspection? and make them tear out concrete slab to redo PVC conduit using only approved equipment?

Sometimes it doesn't make sense to follow the law down to the dot. It is like getting a moving violation because you went 1/2 a mile over the speed limit.
 
kwired said:
Are you surprised they have not made a bender for flexible conduits also? And require all field bends use such a device?
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I have seen a bending device for PVC that supposedly requires no heating. Some type of spring that you insert into conduit, then bend with a hand bender. I don't see how it could work without cracking the pipe. Saw the device in supply house but haven't talked to anyone who had one.
 
iwire said:
Our shop has at least two of them.

We do a lot of site work and the Hot bends are much easier than dragging around a hot box and generator to run it.
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I assume this uses a standard 20 lb propane tank?
 
jmellc said:
I have seen a bending device for PVC that supposedly requires no heating. Some type of spring that you insert into conduit, then bend with a hand bender. I don't see how it could work without cracking the pipe. Saw the device in supply house but haven't talked to anyone who had one.
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I have seen them too, and often wondered about them. Some of the PVC I have been getting lately, I would think wouldn't just crack, it would literally shatter if you bend it without heating it. Can't seem to even cut it with PVC cutter lately without it breaking. Supply houses have been stocking brands I've never heard of past few years instead of Carlon, Cantex, or other well known brands that have always cut with no problems.

jmellc said:
I assume this uses a standard 20 lb propane tank?
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IIRC when I was looking at their site, it uses 8 lb an hour. If bending a lot of large pipe 20 lb tank is likely not lasting very long.
 
jmellc said:
I have seen a bending device for PVC that supposedly requires no heating. Some type of spring that you insert into conduit, then bend with a hand bender. I don't see how it could work without cracking the pipe. Saw the device in supply house but haven't talked to anyone who had one.
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http://www.thepipeviper.com

We have one sitting in our shop that some salesman must have dropped off as a demo, I don't think anyone has used it yet though....
 
kwired said:
I have seen them too, and often wondered about them. Some of the PVC I have been getting lately, I would think wouldn't just crack, it would literally shatter if you bend it without heating it. Can't seem to even cut it with PVC cutter lately without it breaking. Supply houses have been stocking brands I've never heard of past few years instead of Carlon, Cantex, or other well known brands that have always cut with no problems.



IIRC when I was looking at their site, it uses 8 lb an hour. If bending a lot of large pipe 20 lb tank is likely not lasting very long.
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We used some that is made in the Eastern part of the State last week. No one complained.

The last Carlon 2 1/2 we used had a different OD mid stick then the end. That made me real happy trying to get it into a coupling, during that 65 mph breeze we had a few weeks ago.

Tailpipe of truck works. Fresh off the highway preferably.
 
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ptonsparky said:
We used some that is made in the Eastern part of the State last week. No one complained.

The last Carlon 2 1/2 we used had a different OD mid stick then the end. That made me real happy trying to get it into a coupling, during that 65 mph breeze we had a few weeks ago.

Tailpipe of truck works. Fresh off the highway preferably.
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Another "hot box" that works is a weed burner on larger pipe, but a favorite in a pinch is a Milwaukee heat gun.
 
jmellc said:
Yes, that is what I saw. The 90 degree bends the guy made on the video are way too sharp for conduits though.
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From the site:

? Use with Eye Protection.

Apparently there is a risk of pipe shattering.

? No need for a pvc cutter. Also for plastic EMT.

I think you still need a cutter, just don't need to cut before installing pre made elbows. Not sure accurate placement of the bend is going to happen if just bending over the knee like in the video, vs. using a fixed shoe that will give consistent results every time.

What the hell is "plastic EMT" I thought the "M" stood for metallic?
 
kwired said:
What the hell is "plastic EMT" I thought the "M" stood for metallic?
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358.2 Definition.

Electrical Metallic Tubing (EMT). An unthreaded thin- wall
raceway of circular cross section designed for the physical
protection and routing of conductors and cables and for
use as an equipment grounding conductor when installed
utilizing appropriate fittings. EMT is generally made of steel
(ferrous) with protective coatings or aluminum (nonferrous).

hm. aluminum EMT? that's news to me. never seen it.

i think the "plastic emt" was thought up by a marketing
genius who stood too close to the slinky.
 
kwired said:
I will only say what I said previously in this thread, you do not "bend" the pipe with the heater. If the CMP's intention was to not use methods for heating that are not identified for the purpose then they did a very poor job of wording that. I have never seen a "bender" for PVC, only "heaters" intended for preparing to bend.

End of my input on this (probably not, someone will say something I will feel I must respond to:)). It has been hashed on this forum before, someone maybe can find link to the thread.
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EXACTLY!!!!

Bending and heating are NOT the same. And I recall this from before, as well, maybe more than once.

FWIW, I heat my PVC with a heat gun. It works great but you have to keep clear of the hot end after you turn it off for a while.
 
iwire said:
The NEC says this ...


Field bends shall be made only with bending equipment identified for the purpose.
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I do ask those that disagree with my opinion what exactly those words in the NEC mean?
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Well, since 'identified' is defined as 'Recognizable as suitable for the specific purpose.....' even if they were talking about heating, not bending, there is no requirement for the equipment in question to be listed, marked or approved. Pretty much, the rule says if it looks like it will work OK, then it's legal.
 
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