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McElroy Fusion Discussion
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PostPosted: February 29th, 2016, 12:53 pm 
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Joined: September 29th, 2009, 2:45 pm
Posts: 239
Hi,

I have a question regarding saddle fusion procedure.

Ref. following link, pg nos. 134 & 135:
http://www.lm.doe.gov/cercla/documents/ ... 428362.pdf

I was wondering how the "pressure" mentioned in this particular procedure (sidewall fusion of tapping tees) would be applied. e.g. heating pressure is 70 - 90 psi. if I were to apply "90 psi" pressure, what should the reading on my machine pressure gauge be?

Regards,

Inquisitive


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PostPosted: March 1st, 2016, 10:03 am 
This is a standard I am unfamiliar with. I'm not certain if they are referring to gauge pressure or interfacial pressure. I also have misgivings about the fact that they are recommending to keep that heating pressure for the entire heat time, which will displace a good portion of your molten material. For comparison, we typically fuse to ASTM F2620 which recommends and initial pressure to establish melt, then a complete heat time at 0 pressure. This can also be seen in PPI's TR-41 at this link: https://plasticpipe.org/pdf/tr-41_gener ... ng_gas.pdf (page 10 and 11).

In this case, I can't definitively answer what their standard is meaning. I would recommend contacting CSR Polypipe to ask for clarification.

Thanks.


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PostPosted: March 13th, 2016, 12:45 pm 
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Joined: September 29th, 2009, 2:45 pm
Posts: 239
Thanks a lot for the help, Jacob. Will look into the links you provided iA.


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