Recent content by Nitzey

Thank you moltenmetal. That is what I needed to know. And good thought about the reducing tee; it just never occurred to me.

Okay, but what I want to do is to weld in pipe couplings (for quills, temperature probes, pressure gages) into the main process line. So, the question is: what schedule for the main process (2 and 2 1/2") line?

I am designing a plant to make emulsions. Much of the piping can be 2" and schedule 10 stainless steel welded pipe will be convenient for much of the piping. However, we have to feed three ingredients using quills and such things as an in-line pH meter needs to be installed. So, I need to...

Thanks for the replies. A mass meter is preferred here since the flow is very low and we are feeding it into an emulsion. pH shock is to be avoided for emulsions and I want to keep the flow as steady and as accurate as possible. I have checked with well known suppliers of glacial acetic acid...

We need to pump acetic acid into our process, but when I got the cost estimate for a mass flow meter, it was extremely high. It was so high because of the Hastelloy C needed for glacial acetic acid. So, what concentation can I feed without using an exotic stainless steel? 25% is not...

I talked to someone I know at a homogenizer manufacturer and here is what I got from our discussion. This company tends to use 15-5 PH in No. America but duplex ss in Europe (2205). Both are twice as strong as 316 ss. However, 15-5 PH is less corrosion resistant than 316 ss. They do make...

Operating temperature is only 70°C. The company offering the lowest cost is from India. Frankly, their offer is so low, it is amazing to me.

Thanks. What we are making is AKD (alkyl ketene dimer) dispersion in water, a paper chemical. Most AKD is made at 3000 psi, but some companies use much higher according to the homogenizer manufacturers. So, it would seem 316 ss is fine if we stick with a non-chloride formulation. The...

Thanks for the many replies. This is like the last piece of a puzzle (actually last thing in my cost estimate), and I sure would like to get something reasonable done soon. The company I work with has ties with a construction company, and they say they have erected lots of super markets...

Thanks for the reply. I have a lot of experience with homogenizers in chemical plants and all were either duplex stainless steel or precipitation hardened grades. Some were involved with hot applications including chlorides and I never heard directly of problems with the block. The company...

I am designing a chemical plant to be built in St. Petersburg, Russia. Due to the climate, we need to put this process in a building. I have been approached by an American builder of steel buildings who think they might be able to compete with local builders. However, they want me to tell...

I am reviewing bids from four companies for homogenizers. The homogenizer block represents 1/3rd the cost of the homogenizer, and is obviously of great importance. Three bids indicate duplex stainless steels, either 2205 or 2507, as the material of construction. The other company uses just...

Thanks for the good advice. This has been very helpful. What seems clear is that we should have all three metering pumps electronically controlled, and thus all will be 220 V, single phase.

Thanks for your reply. I really did not think this through before posting the question. I am the designer of this plant, which is a new plant at an existing site. 380 V, 3 phase, 50 Hz comes into this site now, but we need to add more power, and a new motor control center is needed. The...

I need to purchase metering pumps for a plant in St. Petersburg, Russia. One quote listed the motor as 220 V, single phase, while another had 220V, three phases? Which should it be?