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I have a Western Digital external hard drive that exits the sleep mode for no apparent reason when nobody is using the computer. What can cause this?

Can anyone tell me how to calculate the MAWP for an 8:1 ellipsoidal head?

What is meant by the "pressure equivalent" of a flange?

Has anyone encountered A325 bolts from China with red stains. Do you know anything about what is causing this problem?

In our network the computers tend to "hang up" sporadically betwen 1:00 and 2:00. This problem started about a month ago. What could be causing this?

ASME VIII says to use Fig.UG-29.2 to determine the maximum allowable unsupported length (gap) for a ring, but it does not say how many gaps are allowed. Is this figure supposed to be the total allowable gap for all gaps? We want to install the ring as two halves and there would be two gaps.

Can saddle rings also be used as vacuum rings?

How do you calculate the required thickness of a tank shell or head under external pressure from steam in a dimple jacket.

What is used for the allowable hoop stress with seismic loading in a filament wound vertical FRP tank?

What is used for the allowable hoop stress in a filament wound vertical FRP tank?

For FRP tanks, what is the difference between a type one laminate and a type 2 laminate?

For FRP tanks, what is the difference between a type one laminate and a type two laminate?

Does anyone know the allowable stress, modulus of elasticity, coefficient of thermal expansion, and Poisson's ratio for A992 at 660 F?

We will have a vessel containing a suspension of solids in water at 340 F (103 psig). We want to depressurize the tank to 1 atmosphere. This will cause 13.5% of the water to flash. We are concerned about losing solids out the vent due to the vigorous flashing. What is the best way to...

I want to circulate a solids suspension in water through an external heat exchanger and back into the tank. The temperature will gradually increase from 190 F to 340 F with a final pressure of 103 psig in the tank. How can I pump (circulate) the suspension at it's boiling point and high pressure?

What construction code covers horizontal fiberglass tanks?

I am trying to determine what is meant by "coefficient of structural stability" and "coefficient of structural resistance". What are acceptable values for these?

I am trying to determine what is meant by "coefficient of structural stability" and "coefficient of structural resistance". What are acceptable values for these?

If you have two rings at the same location on a tank shell, one on the inside and one on the outside, do you add the inertias of them?

I want to plot data on an Excel chart using VBA. In Quickbasic there is a "Line" statement that can be used, e.g., Line (10,10)-(20,20). Is there anything similar to this in VBA?