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 Post subject: Hot tapping connection
PostPosted: August 16th, 2006, 3:37 pm 
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Joined: August 16th, 2006, 2:05 pm
Posts: 137
Is there a replaceable plastic extension that comes on the Hot tap tool where the fusion to the hot tap tee takes place? Also, can this process be done with the electrofusion process?


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PostPosted: August 16th, 2006, 3:37 pm 
The McElroy Hot Tap Tools consist of a custom machined gland fitting with a factory butt fused length of pipe. This pipe is specified to match the type of pipe the customer will be using in the field. I believe this is the “extension” to which you are referring. You shouldn't have to replace the extension on the hot tap tool. When you remove the tool from service, you should always cut the tool at the bead between the “extension” and the ball valve. With this procedure, the next time you fuse the tool together to make-up the proper length, the old fusion bead will be removed in the face-off. The small difference in length can be accommodated in the total make-up length of the tool at the next hot tap.
The following link contains an excellent animation showing how the process works:
http://www.mcelroymfg.com/fusion/flash/hottap.htm

Once the tool has been used several times, you can bring the tool back to its original length by butt fusing another, shorter extension nipple to the tool. The tool would now contain two butt fused joints, the original factory joint and the new joint you have added. Be sure to use the same type of pipe with which the tool was originally purchased. If you have removed the pipe completely from the machined glad fitting (in other words, the tool no longer contains the factory butt fusion joint), you will need to return the tool to the factory to be rebuilt. McElroy does NOT recommend using Hot Tap Tools with an electrofusion make-up.

Be sure to read the manual for the Hot Tap Tools at:
http://services.mcelroymfg.com/manuals/224901.pdf


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 Post subject:
PostPosted: August 16th, 2006, 3:38 pm 
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Joined: August 16th, 2006, 2:05 pm
Posts: 137
Mark you don't have to send the entire tool in for renewal, just the gland fitting. In fact you can just purchase a new gland fitting and replace the old one yourself. The reason we don't recommend the use of electrofusion is the make up length is somewhat critical, and by using electrofusion couplings you would have to replace the gland fitting after one or two uses.
As a side note you don't have to use a ball valve, you can use a squeeze off tool. But we feel you have more positive control using the hot tap tool with a ball valve


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