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I'm looking at an existing thermal relief valve and trying to calculate a relief load for it. (The client doesn't have this information). The valve is on the cooling water (tubeside) side of a shell and tube exchanger. The case I'm examining is a blocked exit of the cooling water, while the...

I'm looking at Perry's 7th Ed., Table 2-5, Vapor Pressure of Liquid Water from 0 to 100°C. Is this a typo? 33.2°C, Pvap = 38.155 mmHg 33.3°C, Pvap = 38.369 mmHg 33.4°C, Pvap = 33.584 mmHg (Should this be 38.584??) 33.5°C, Pvap = 38.801 mmHg 33.6°C, Pvap = 39.018 mmHg 33.7°C, Pvap = 39.237 mmHg...

Are there any guidelines anywhere that would say if it's alright to exceed flange ratings in an upset case? My client has installed a new pump, and we are designing a vessel that goes downstream of the pump. In order to set the design pressure of this vessel, I've investigated two cases. One...

I had originally specified a small vessel (filter shell) with a design pressure of 150psig and a design temperature of 350°F, but after looking more closely at the specified pump and the PSV loads, I realized that the design temperature and pressure might need to be changed. I changed the...

Does anyone know how to repeat rows at the bottom of each printed page in Excel? I have a 412 character text string that I want to be repeated on the bottom of each page, but the footer will only allow me to use 255 characters. If I could somehow insert an image file into the footer, I could...

I've been looking for some data on MDEA viscosity at low temperatures. As of yet, the lowest temperature that I have found any data for is 32°F. I want some data so that I can show the need for steam tracing piping through which pure, or almost pure, MDEA flows. The ambient temperature can...

When sizing a PSV, there are a number of cases that one must consider. Blocked exit is just one of them. I am looking at the blocked exit case for sizing a relief valve on a trayed amine absorber. The feed is a header system in which a few streams combine before flowing into the absorber. Of...

I'm a chemical engineer who's always been interested in applying chemical engineering thinking towards things in the body. I took a few classes in college that gave me a "biomedical" specialty within chemical engineering, but my current job has nothing to do with bio stuff. Anyway, I...

Anyone know of a website that lists API Pump specs such as A-8, S-1, S-6, etc. and what each of them means? I know that one of these designations basically specifies all materials in a pump, but I do not know what each spec means. When we do equipment lists, we show things like "Carbon...

Can anyone let me know some companies that make eductors/ejectors other than Schutte & Koerting, Penberthy and Jacoby-Tarbox? If possible, could I get a phone number and/or website address? Thanks Canoman

Does anyone know of a good method to calculate the quality of steam leaving the disengagement space of a waste heat boiler? The boiler recovers heat from reactor effluent and produces steam to cool the process gas. I am looking for a method on how to figure out how much water is entrained in...