I'm trying to size a fluid buffer or surge protector for a small hard piped manifold which has a 1500psi output regulator and a number of small valves.
We've experienced (in the past) regulator jacking (rapid open/close cycle) when there isn't enough fluid capacitance in the circuit between the...
I'm doing some reading on the TMI incident.
There were human factors at play, but a critical pilot operated relief valve was also faulted. I've seen this noted in many reports (Rogovin report) as well as all over the net and unfortunately also Wikipedia which everyone references.
What I don't...
The way it's done in work class ROVs is with a pair of bare wires connected to a low power shorting circuit. They're placed in the low points in the electronics housing and send an alarm to operators when they're tripped (by sea water)
It's very simple, but very effective. Leaks are usually...
For ASTM A240 thick, hot rolled, annealed plate UNS S31603 (316L)
What material issues may cause a properly run ASTM E8 to report an estimated Elastic Modulus (Youngs) significantly lower than expected? (28-31Mpsi)
What testing issues may cause a good piece of material to show a very low...
I understand the 50/50 split. Our trouble as I understand it (I'm in my design silo, and mfg engr is in their silo), that if you start with 49% ferrite in base material, then weld it, you'll certainly increase the ferrite in the HAZ. It may still top out at 55% but we've bought into a hard 50%...
I have my own question.....
We've been trying to put together a weld repair procedure for duplex for a while. Well, not trying, but just suffering without one.
A metallurgist consultant recommended that above other criteria, we must ensure that we have no more than 50% ferrite in the HAZ. (We...
This is more of a survey than a specific question.
I'm curious about preferred material selection for subsea use. In my experience most companies have a small pallet of approved choices for various applications. This pallet is developed over the course of multiple projects, with input from...
Nylon can be permeable does absorbs a lot of water compared to other materials. A lot more so than urethane or UHMW for instance. Most overmolding I've seen for subsea is done with urethane or gre.
"large" 11-13", blind sealing bores. The addition from current is usually under .010, but I understand we'll be making an undercut and building up so we don't cut through the fusion zone when finishing.
Hey, I was the one asking the questions, remember?
I'm looking for input from people who use or have used laser cladding to reclaim or rebuild parts. I have a large high dollar 316L weldment with some sealing bores on it. During final machining or testing the tolerances were blown out of spec.
We want to add 316 or something even better perhaps...
After receiving the part we started cutting our finished geometry. We didn't attempt to work harden by strain or machining stress. The parts are domes of about 18" round so support or shipping isn't a likely source of trouble.
304 is pretty cheap stuff anyway, but from some sources its even cheaper and quality can be a problem. We've had some bad experiences working with products of China, Russia, and some other questionable areas. If your going to buy products from there you're at risk and should increase...
Actual load testing on the part. Prior to and afterward it spent several hours on the CMM. The part is yielding.
Can Nitronic 60 store residual stress? That's question 1. Question 2 is how can I get rid of it?
