"file:///C:From: Rusty Pressnall
Sent: Thu Jul 16 11:16:40 2015
To: 'Jennifer Cline'
Cc: Jake Ehredt; Jason Clifford
Subject: RE: Molalla Force Main Repair
Importance: Normal
Now that we know what we’re dealing with, I can call the fab guys and see how fast they can do it.
Looks like the HDPE in the ground is 8” DIPS and 24” DIPS PE3408 DR11 which has a pressure rating of 160 PSI. Industry standard for HDPE currently is PE4710 which has a DR11 pressure rating of 200 PSI. We can design the new reducer accordingly.
Can we remove the 8” valve if we need to? Based on the lay length of the 24” tee, the 24” coupler, the 24x8” reducer and the 8” valve we may want to plan on being able to move the valve down the 8” line a foot or so in case we don’t have enough room between the existing tee and the new reducer. The only extra parts we would need are an 8” DIPS electrofusion coupler and gaskets.
Let me know if you think this would work,
R
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: Thursday, July 16, 2015 11:11 AM
To: Rusty Pressnall
Cc: Jake Ehredt; Jason Clifford
Subject: RE: Molalla Force Main Repair
Hi Rusty,
Do you have a good idea when you can schedule the repair. It is becoming more of a urgent need to get the lines up and running again for irrigation.
Regards,
Jennifer Cline, P.E.
City of Molalla
Public Works Director
O: 503.759.0218
F: 503.829.3676
From: Jennifer Cline [mailto:jcline@cityofmolalla.com]
Sent: Thursday, July 16, 2015 10:57 AM
To: Rusty Pressnall
Cc: Jake Ehredt
Subject: RE: Molalla Force Main Repair
Hi Rusty,
I spoke with Jake this morning. He informed me that the pressure leaving the plant from the effluent pump station is 105 psi. With a 25% FOS that would be 131 psi. However, I think I found the info you’re looking for. See attached, and let me know?
Also here are the measurements Jake made in the field today:
· 25.95” OD
· 9.10” OD
· 1.03” – from 90-deg “T” to 8” flange on valve
If you have any more questions that Jake can answer for you in the field, please feel free to call him at 1-971-241-7547.
Thanks,
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: Thursday, July 16, 2015 9:21 AM
To: 'Jennifer Cline'
Cc: 'Jake Ehredt'
Subject: RE: Molalla Force Main Repair
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