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 Post subject: sidewall fusion
PostPosted: August 16th, 2006, 3:52 pm 
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if you are doing sidewall fusion on 4" DR17 PE pipe on a sidewinder what would be your proper heat setting and fusion pressure?


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PostPosted: August 16th, 2006, 3:52 pm 
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Ray, The temperature for sidewall fusion is alway 500 deg F. on the surface of the heater adapters.
Now comes the other parameter, What are you trying to sidewall fuse, a tapping tee, a service saddle, or a branch saddle? This will make a difference in the force you use to achieve melt and fusion. Force to fuse is 30 pounds per square inch of the fitting base in contact with the main.
The PPI procedure for sidewall fusion is to apply twice the fusion pressure to extablish the melt pattern, once a 100% pattern has been established, drop the pressure to 0 (Zero)and maintain heater contact with the fitting and main for a period of time, depending on the size of the fitting base (20-60 seconds) then remove the heater and apply the calculated fusion pressure. Maintain this pressure through the entire cooling cycle. Wait 20 minutes for rough handleing or tapping the main.


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PostPosted: August 16th, 2006, 3:52 pm 
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terry, I'm welding a 2 inch service saddle onto the 4" pipe.


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PostPosted: August 16th, 2006, 3:52 pm 
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Again we have two options. Is it a round base or a rectangular base? This will determine the surface contact area. I will give you both.
Round base 2" branch saddle would require 160psi to establish melt, soak at zero for 20-40 seconds, Fuse at 80psi.
Rectangular base would be 180 to establish melt, soak at zero for 20-40 seconds, fuse at 90psi.
Fitting Mfg are now labeling the fittings with their recommended fusion forces. It can be found in the lower right hand corner of the lable on each fitting. If your fitting was made recently look for their recommended forces on the label.
Hope this helps


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