OK, you lowered the power requirement, but does this not in some way reduce process efficiency, since you are wasting a large portion of the blower energy input?
I would like to weight in here, since at least I have some experience with roots blower driving a chemical process (oxidation).
1. We had no VFD at all, and the blower was belt-driven, but as I recall sheave ratio was in the form of a speed up ratio.
2. Out objective was to push as much air as...
@Chumpes
Yes, if the SI units are employed, then everything is based upon second, meter, kilogram (not gram). Moles are Avogadro's number of atom or molecule, represents that mass in grams, i.e. carbon is exactly 12 g/mole,if all the atoms were 12C.
Yes, gram mole is a mole. Yes 1000 moles is...
I do not have a copy of API 581 or API 581 RPI(risk protocol inspection?)
I am not going to spend $900 to have it.
In performing these calculations, one must have familiarity with the units of measure involved.
R= 8.31447, refers to the value of the ideal gas constant with units of...
@Chumpes - yes you are correct. Oxygen in that range can and will contribute to corrosion. We are talking about "deep" produced water here, and I suspect
it does not meet the definition of de-oxygenated water. With the chemistry of the original poster's water, there had better not be much...
A quick search yields ample product support from Emerson-Rosemount. What did they say when you telephoned them?
pressure transmitter family
Surely you can access a copy of the manual, and look at the "troubleshooting" section.
It does sound to me that you have a blockage over the element(s)...
You do not have to apologize to me, especially when pointing out such a glaring misquote on my part. I knew better than that!
I am the one that is sorry. Thanks for bringing it to my attention, asleep at the wheel once again.
Any exemplar of the Japanese made parts to compare with?
I would do my best to find out the elemental composition if at all possible, and this might be done non-destructively with a PMI gun (except for carbon steels, these typically will not be able to distinguish).
Link
There is clearly no...
I believe your first assessment (exposure to seawater, and/or salt air) is the correct one - general corrosion with some pitting may be evident.
You accepted this shipment?
It appears to be case closed, based on the reports of high residual stress from deep drawing, and propagated cracks appearing to run parallel to axis, not hoop.
SCC will most definitely take place in 316SS when there is high heat stress (as in cooking on a high temperature burner, with little or...
If you still have some of the lower Al content stock, work up a part or two (coupons) for fine polish, and also work up a part or two or three of the 0.004% Al current stocks, and polish these up also in precisely the same way, same duration, etc.
Put a hickey on each part, or a stamp mark...
I reviewed the analysis you linked to. You state it is a sealed produced water system. Are you certain there is nil oxygen content in the water at the point of origin? I would suggest at least one further test, and that would be ORP. Based on the TDS, species, and the pH, an ORP value for no...
Whatever the limits are, with free water and that much sulfur, you can make a safe bet this is sour, and needs treatment to prevent cracking corrosion of the steel.
