An old engineer once told me, "Rob, your job as a technical expert in the organisation is to give the technically correct answer. Let the managers worry about the money". That's still a motto I live by today.
I don't know much about UAN, but I understand that when it is not properly cared for...
I don't think I understand that question.
In my jurisdiction, the EPA guidelines would spell out the ammonia vapour restrictions.
You would give the client a range of options from lined carbon steel to intrinsically corrosion resistant materials and costs. An indication of the life cycle...
Thanks for the replies.
After trawling standards and codes, I figured that wind assisted wave action wasn't a huge issue. So it's reassuring to get your replies. Naturally, so long as the tank was designed to structurally withstand design wind loads and remains fit for purpose, this tank should...
Hi Folks,
Currently tyre kicking API 650 and various forums regarding whether there might be any specific issues to be concerned about in respect of wind generated waves inside a 100 ft diameter, 48ft high, all welded carbon steel open topped tank. The tank construction is circa 1960 with the...
Hi ET peers.
We have a circa 1960 B&W D type package boiler with some serious issues and need to do some fitness for service calcs on the (severely corroded) floor tubes. They are listed as 3.25"OD x 6WG BS3059/13 tubes, assumed to be carbon steel.
Unfortunately much of the original original...
Thanks XL83NL.
I'll give that link a look later on.
We tend to run a retensioning step once a critical hot flange has come up to temperature. It's not a perfect or even ideal approach, but in terms of seat of the pants maintenance engineering, it's held our 24hr production operation in good...
...well now that you put it like that, that makes a lot of sense! [smile]
If the service provides some stress relief, it won't be possible to reliably predict the reduction in strength of each bolt, rendering assumptions and calculations unreliable.
Thanks TVP.
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Hi Folks.
There seems to be fewer bolt queries in this forum than in the materials forum, but I figure I should ask a bolting question in the right forum first up, so hopefully you can help me out.
In looking through a company engineering spec regarding bolting and flanges, it conspicuously...
"Bicycle wheels weigh ~ nothing.
Motorcycle wheels have more mass."
...would be my argument too. It would seem to be so obvious that I can't believe two motorcycle related wiki entries have this glaring error... I was hoping to get something more concrete before registering on Wiki and pointing...
Just how much contribution does the spinning rear hoop provide to motorcycle stability? The current version of the wiki on motorcycle and bicycle dynamics says that it's not much, however it is referencing two bicycle papers, which are hardly ideal motorbike analogs with respect to rear wheel...
BigInch, yep, that is fully understood and is correct practice for a time based degradation mechanism. The question is where you can't determine a defect/degradation mechanism!
SJones, that report seems like exactly what I'm looking for. It's just downloaded. I'll be getting a coffee and...
Folks,
My plant is in the middle of an RBI review program.
The regulatory regime is a self regulating safety case based environment where we are held accountable to our own engineering judgement.
We see some great opportunities to apply long internal inspection intervals on critical process...
Why is there a water level in an air receiver drum?
At our plant, drums with no liquid service automatically get exemption from having a fire case considered for SV sizing.
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"Life! No one get's out of it alive."
"The trick is to grow up without growing old..."
Apologies for cross posting, but I wanted to get an operators point of view on the question below. Cheers.
I've had a question from a manager, asking what I thought about parallel slide valves in HC isolation service.
I don't think they're a good idea in HC services since they are only leak...
Thanks for your comments gents. I believe we have one of these valves in storage and a need to replace an inservice valve... so I suspect there's a cost motive and also a testing the boundary motive in the manager's question.
The type of valve is as described in the pdf at this link...
