Thank you BigInch. Everything I found so far leads me to believe I will have frictional forces also applied to the anchor consisting of weight of pipe incl water x length of pipe x friction factor. This would add another 50# x 2000 ft x .3 = 30,000# to the load of the anchor. The structural...
BigInch, can you let me know what the forces are at the anchors if this is my arrangement? I am having trouble wrapping my brain around your proposed anchor system which appears to let the pipe free float with exception of directly below the roadway joint.
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Thank you everyone for your great input to this problem. In regards to BigInch's reply I think my problem may be in having the 2,000 foot of pipe between anchors. The friction force of this is 2000ftx50#/ft*.3= 30,000#. I used .3 because of steel on steel roller supports which are every 15...
The pipe is 8" schedule 40 steel. Is there a chart for maximum buckling load for pipe? I googled and can't find one and don't have a structural engineer in house to ask. The bellows force came from the vendor catalog sheet for 8" expansion joint @ 150 psi. I am thinking of starting at 500...
Do you think the fact that the bridge is steel and therefore should expand at somewhat of the same rate that the pipe may actually slide very minimally over the guides and rollers so that friction may not be that great. The bridge would essentially move with the pipe and the support locations...
I have a 6000 foot above grade crossing for a new water line on a steel bridge. Due to tight constraints and aesthetics we are using bellows type joints. The pipe is 8 inches in diameter and is at 150 psi. I am wondering what the anchor forces will be if I have 2,000 feet between anchors with...
I have Trane Trace but I have never used it to figure out exhaust fan cooling only airflows. The interior temperature setpoint is always set to 72F for cooling which always gives some conduction load. If I set the interior setpoint to 104F with supply air set to 94F, then I get some crazy...
I have a 1,000 SF electrical room, with some transformers, panelboards, etc that is a free standing building. All four sides and the roof are exterior. I have close to 40,000 btuh of heat load due to internal equipment but my question is if I want to keep the room below 104F with an ambient of...
Just to close the loop on this. I called the compressor manufacturer and they informed me that SCFM to them means standard conditions at their test criteria. Their standard conditions is 100 psi. No wonder it is confusing when we have different companies having different terminology for SCFM!
I think it is the vendor literature that is confusing. It states 3,000 cfm free air delivery and 150psi working pressure. It is a 800HP compressor, so I think they mean 3,000 cfm of 150psi air. If it were standard conditons then it would only be 294 cfm at 150 psi.
I posted this in the pipes forum and they directed me here..
It I have a compressed air continuous plant demand of 15,000 scfm at 30 psig, can I serve this with an IR compressor rated for 3,000 cfm free air delivery at 150 psig with a pressure regulator to 30 psig? I am confused as to what the...
Thanks Cry and SAK. I ran the energy model and I was only getting a 2% savings with the VFDs so it is not worth it. I was surprised to see that I was also breaking even on the energy wheel tonnage savings vs what it costs to run the erw motor. The OA is only 1800 cfm as cry guessed, so I...
These are pretty small air handlers, no more than 2,000 cfm each. I am not sure that the outside air will drop much when the ahu speed ramps down, but I do have to submit for LEED Silver and I want to make sure it is correct. What do you think about having a pressure independent VAV box on the...
Can I have a constant speed DOAS system serving 10 air handlers that have variable frequency drives? Will the outdoor airflow rate remain the same throughout all operating points of the air handler fan? I'm assuming it won't since the pressure in the mixing box will change and I would need...
bimr...the pond in question is a stormwater retention pond that at times can be dry so I think the submerged diffuser would not be a good option since if there was no water cover it would shoot at a high velocity.
