"file:///C:From: Rusty Pressnall
Sent: Thu Jul 16 09:20:34 2015
To: 'Jennifer Cline'
Cc: 'Jake Ehredt'
Subject: RE: Molalla Force Main Repair
Importance: Normal
Hi Jennifer,
I don’t see anything on the docs you sent that gives us a clue as to the design pressure. Can you talk to your engineering people and see what pressure rating they need? The two most common types of HDPE are DR17 (125 PSI) and DR11 (200 PSI) but depending on what pressure the system was designed for it could be from DR32.5 (63 PSI) to DR7.3 (317 PSI).
If you can find a print line on the pipe it would be helpful but it’s old enough it may be long gone. The only other thing we could do is to disassemble some part of the system to get the wall thickness of the HDPE and work the pressure rating out from there.
Let me know how I can help,
Rusty
Rusty Pressnall | Service Manager
HD Fowler Company | Bellevue Branch
Phone: (425) 748-5348
Fax: (425) 641-8885 | Cell: (425) 449-9701
From: Rusty Pressnall
Sent: Wednesday, July 15, 2015 6:30 PM
To: Jennifer Cline
Cc: Jake Ehredt
Subject: RE: Molalla Force Main Repair
Hi Jennifer,
I’ll take a look at the design data tomorrow when I get to the shop (too hard to see on my little screen at home).
Based on the new pics I’m guessing the tee and reducer were built as one unit at the fitting manufacturer and not put together in the field. We may not be able to blame the contractor. J
Based on the color of the backing ring on the 8”, I’m guessing it’s IPS instead of DIPS (IPS is usually red, DIPS is usually blue). We should still put an OD tape on it to confirm.
I’ll get back to you after I look at the docs you sent relating to the design pressure for my best guess.
Thanks,
Rusty
Rusty Pressnall | Service Manager
HD Fowler Company | Bellevue Branch
Phone: (425) 748-5348
Fax: (425) 641-8885 | Cell: (425) 449-9701
From: Jennifer Cline [mailto:jcline@cityofmolalla.com]
Sent: Wednesday, July 15, 2015 4:32 PM
To: Rusty Pressnall
Cc: Jake Ehredt
Subject: RE: Molalla Force Main Repair
Hi Rusty,
Jake is still working on getting the measurements from your email today. We should have those to you sometime tomorrow morning.
Also I have included the Design Data information. It appears the other pipe used for this line is C-905. I also am sending the contract provisions for the HDPE. I hope this will provide enough information to determine the needed pressure rating.
Regards,
Jennifer Cline, P.E.
City of Molalla
Public Works Director
O: 503.759.0218
F: 503.829.3676
From: Rusty Pressnall [mailto:rustyp@hdfowler.com]
Sent: Wednesday, July 15, 2015 9:33 AM
To: 'Jennifer Cline'
Subject: RE: Molalla Force Main Repair
Hi Jennifer,
When your guys get the pipe between the 90 and the reducer exposed, we need to get an OD tape on both pipe sizes. I noticed the drawing says 24” DIPS which is fairly uncommon around here, usually we use IPS pipe.
24” DIPS is 25.80” OD, 24” IPS is 24.00” OD.
8” DIPS is 9.05” OD, 8” IPS is 8.625” OD.
It’s important to verify what the pipe OD’s are and what the pressure rating needs to be so we can have everything built correctly.
Thanks,
Rusty
Rusty Pressnall | Service Manager
HD Fowler Company | Bellevue Branch
Phone: (425) 748-5348
Fax: (425) 641-8885 | Cell: (425) 449-9701
From: Jennifer Cline [mailto:jcline@cityofmolalla.com]
Sent: Tuesday, July 14, 2015 10:28 AM
To: Rusty Pressnall
Subject: Molalla Force Main Repair