DOL means Direct Online. Basically the motor starts within 1 to 2 seconds up to full speed and tends to draw about 6 times full load current for a few seconds. Fine if ypu are connected to a grid supply, but a big issue when connected to a generator when that 6 times current can result in an...
So what does your VFD run? that 20hp motor?
Do you have anything like a single line diagram or circuit diagram showing what is connected to what?
what is the usage / load profile? i.e. when running is the load fairly constant and mainly the pump or do you want the unit to run all the other...
It freaked me when I saw operating pressure > design pressure, but that's how PV design seems to work.
State a design pressure,
Do the design work to ASME VIII
From the design output with various minimum thicknesses back calculate the MAWP which can significantly higher than design...
My experience of such people is that one of the reasons they are "rich" is that they expect " other people" to pay for everything....
It's not chappaquiddick is it??
Well if that report is correct then it's starting to look like a deliberate act.
The anti yaw action may have masked shut down of one engine followed by the second.
But why would anyone do this at take off???
So what is the current arrangement?
Why not use a weldolet, or split tee?
Option B looks horri⁴ble in terms of stress concentration. And generally anything that just looks terrible usually is for strict engineering reasons.
Why does project specification require flanges?
Add more supports.
Pipe like this doesn't like point supports and long term has a tendency to creep and sag.
Also next time don't assume we all know Gernan codes and standards...
Application - you can estimate the quantities of oil gas and water in a single pipe.
Accuracy - varies widely depending on the metering technique used, the ratio of oil / water / gas and the vendor claims. You often find that a certain meter or vendor is good for one ratio of components, but...
I agree with the others - "API tank" is very vague.
Even then the vacuum collapse pressure is often very low, inches of water column.
So yes, outflow rate or condnesation of contents has a big impact on the pressure if it is only a bit blocked, but collapse happens more often thatn you might...
English is ok, but a drawing helps immensely to understand your issue as it doesn't make sense to me I'm afraid.
Details such as size, depth, location etc
The problem with any screen is that it can get easily clogged with bugs, spiders, rust, debris like leaves or plastic bags etc.
Hence you are well advised to also include a specific vacuum relief valve and vent valve to prevent tank collapse, especially when the fire pump kicks into life. API...
At flight idle the engines still generate electricity - that's how it works when you're queued up waiting for take off.
There's a lot of possible reasons why they either stopped being connected to the electrical bus and responded to an incorrect signal going to idle, but we're talking major...