Does anyone have references that propose reasonable minimum criteria (e.g., maybe a tabulation of ##,#### hours by pump type, or in general). Thanks!!!
I am looking for financial risk model(s) that would support go/no-go design analysis financial spending decisions during design to avoid/mitigate construction and/or operational cost risks for hard to quantify risks. Is anyone aware of tools of this nature.
I am looking for information on industry recommended minimum L-10 bearing life for motor bearings as a function of application/service/duty (i.e., pump applications mostly). I expected that HI or API might have something on this but I seem to have come up relatively empty handed. I'd be grateful...
Hi all,
I am contemplating starting an electronic, cloud based, company internal shared engineering resources library (i.e., handbooks, journal articles, manufacturer's written recommendations, etc.) to facilitate access to the most relevant industrial resources in our niche area.
I am...
I am looking for any position papers or references that make a case for the recommended text and leader color to use when identifying existing conditions on classic contract physical plans (hard copy). The context is municipal engineering contract drawings where new/existing/demo need to be...
I am writing to inquire if anyone has any experience (or is aware of any) where the HI 9.8 pump bay divider walls have been constructed out of any material other than cast-in-place concrete. The standard is silent on the material and width of these features. I've always made them out of concrete...
Hi all,
Brainstorming some ideas for a pump station to permit pump downsizing pumps (ideally with minimal future work) in the future when a new larger force main comes on line.
Scenario: Pump station capacity expansion that operates on an existing undersized force main (FM) line (currently...
Out of personal curiosity, I am hoping to track down a list or database of the largest pumps and largest pump stations (of each kind, e.g., water/wastewater/storm water/etc.) in the world. I have googled around rather unsuccessfully for this. I am putting this question out to eng-tips.com to...
Hi,
I need to size some lines for a vacuum system for a critical service. The pressure range is from 0 to 24 inches of Mercury vacuum (in Hg V). I have looked through a number of different resources to identify the right equations to use for pressure drop in vacuum lines and performed some...
I am looking for any/all information and/or data on flow straightening devices for pump inlet piping flow conditioning.
HI 9.6.6, E.2 (informative, not part of the standard) indicates that in some instances where the required pump inlet straight length of piping cannot be achieved, flow...
I am looking for information on what instrumentation and testing criteria would apply to physical model studies for centrifugal pump inlet piping.
For pump inlet piping conditions that do not comply with the requirements of HI 9.6.6 the standard appears to allow for a physical model study to...
I am looking for geometric vertical headroom clearance rules of thumb for rigging pumps into/out of a space via a monorail equipped with an electric hoist and trolley.
More specifically, how much room is necessary between the top of the equipment to be rigged over and the bottom of the hook...
I am looking for operation and maintenance information/feedback on rotary screw compressors in a specific but simple/common application.
I have an oil free application where a rotary screw compressor will need to charge a 1,000 gallon receiver tank about twice (2) per day with 100 psig...
I am looking for information on what instrumentation and testing criteria would apply to physical model studies for centrifugal pump inlet piping.
For pump inlet piping conditions that do not comply with the requirements of HI 9.6.6 the standard appears to allow for a physical model study to...
I am writing to ask for rules of thumb on how to estimate level of effort in hours for the preparation of reports (e.g., think stormwater management plans, etc.).
We have not previously prepared these types of reports for our client however they provide standard operating procedures and...
I am looking for good sources of information on proven treatment technologies for combined sewerage overflows (CSOs). I would be grateful for any conceptual level sources of information that anyone is willing to point out. Thank you.
I am writing to request feedback on what technical criteria can/should be used to define when CFD and physical scale modeling of pump station wet wells should be performed versus when it is not necessary.
Without any problems, I have designed and built dozens of relatively small capacity pump...
The purpose of this query is to request practical feedback regarding any the detriments associated with running a progressing cavity positive displacement pump’s suction at a vacuum that exceeds what the pump’s mechanical seal is rated for. I understand that under a vacuum (in excess of the...
I would like to start/purchase/run an engineering consulting design business. In order to shortcut the upstart period, I have encouraged me to consider purchasing an existing business. In an attempt to identify listings of existing engineering consulting design firm businesses for sale, I have...
I am writing to ask for feedback from others in regards to what they have experienced in regards to requirements for signing and sealing change order drawings.
I am a PE working on a construction project. The construction bid documents were signed and sealed. The Conformed documents (i.e...
