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Hello all, I'm hoping someone would we willing to help me out with the following calculation: I need to calculate the heat transfer through a "barrier" that is used to mitigate a possible silane jet fire. The barrier consists of two layers of expanded galvanized metal that forms a convoluted...

Hi all, Recently I've been doing some research on what the average salary would be for someone like me in the Bay Area. I'm a U.S. resident with a foreign degree equivalent to BS Me. I worked some years prior to my move to the U.S., but for this exercise I'm not even counting these years. So...

Hello all, I need to calculate the deflection in a PFA pipe with double containment in PVC. I also need the stress on the PVC containment, assuming zero stresses on the PFA tubing. I can calculate the deflection of one pipe, based on single span beam, but, since we're dealing with "double"...

Hello, How can one estimate the Lethal Concentration of a mixture, for example: 5% Diborane in Nitrogen (5%B2H6/N2) For the explosive limits (LEL,...), I understand i need to use Le Chatelier's principle: reciprocal of the sum of the mole fraction / LEL proportion. Can I use the same...

hello everyone, i'm working on a list of pipe materials for which i need to find the roughness values, for use in a pressure loss calculator. I've done quite some research, including here, and i was surprised to see that: A. It's hard to find that kind of info B. Values are different, depending...

Good morning everyone, does anybody know if the use of compressed air, for activating diaphragm valves, in a solvent room is somehow regulated? Typically, we'd use compressed air for diaphragm valves, but in a solvent room, we might want to use nitrogen instead, to avoid a mixture of air with...

Hello all, I'm a new user with CAEpipe (demo version), and already I have a question regarding the materials that can be used in CAEPipe. It seems there are no libraries available for plastics like PVC, or PVDF. I contacted the tech support, and I was told they don't supply non-metallic piping...

Hello everyone, I am trying to solve an excel table problem, and after research I find myself stuck and am hoping for some experts' help. I have a table showing data for Pipe Loop dimensions for thermal expansion. In the first column, I have the pipe sizes. The rows contains deflection data...

Hello, I read in the IFC (2003) that asphyxiant, irritant and radioactive gases are not regulated by the IFC. Can someone please help me understand why, and where i'd need to look for storage requirements for these kind of gases? Thanks! Process - Piping ing - EiT

Hello all, I have been reviewing the inside storage requirements for gases in a semiconductor facility (H-5), chapters 18, 27, and all the hazard specific ones (IFC 2003). It seems to me that all gases, meaning the ones regulated by IFC, can be stored inside a H-5 room. Rooms have specific...

Hello, I have a water system with a huge NPSHr, compared to the NPSHa. I can't do much about the NPSHa, so i need to somehow reduce my NPSHr. I'm wondering what the effect would be on the NPSHr of adding a second pump in the line, in serie with the first one, somewhere halfway the end. Any...

Hello, i' ve been trying to find a specification for nitrogen usage in a fab that has requirements for max argon concentrations. So far i wasn't able to find a reference to argon impurity for nitrogen. Does anyone have a suggestion? The fab is a semiconductor one. Thanks! Process - Piping ing - EiT

Hello all, does any of you have any concerns/thoughts re: the storage and distribution of 35% liquid CaCl2? I have this installation with pvc pipes going from a truck loading station to a storage tank and from there to the workshops. I don't have much information, and from what i could find on...

Hello all, I'm an Industrial Engineer from Belgium, recently moved to the Bay Area. I understand that one has to pass two exams, in order to be a licensed engineer here. I am preparing for the FE exam in October, but I was wondering about my title. If I mention that it's a Belgian (European)...

thread731-143459 Hello all, it's been a while since my post thread731-143459, where I explained I was about to move to the US. Well I did that, I married my American girlfriend, and am now waiting for my Employment Authorization Document. Which should arrive any day now. I hope! Anyway, I...

Hello all, With the new Macintel computers from Apple, i was wondering if Mac users will be able to run Autocad on their computers (at last). Anyone with an opinion on this? Thanks! Draftsman - Designer Industrial Piping

Hello all! As an Industrial Engineer from Belgium, I'm about to move to the US in a few months. I've been reading this forum for a while now, and it appears to me that there are lots of different kind of Engineers out there. Or people calling themselves Engineer. Here's how it works in Belgium...

Hello everyone. We, here in the design office (piping design, chemical plant), are having a discussion about the use of colors in Piping & Instrumentation Diagrams. Some wants to use a different color, and layer, for each piping line (process, air, cooling water, raw water, nitrogen, steam...

Hi everyone! I just got some drawings emailed. They all have a cad extension (example.cad). I can't open them with autocad. Can anyone help me open them? Thanks! Draftsman - Designer Industrial Piping

Hello everyone! In a few months, I will be moving from Belgium to California, where I will marry my American fiancee. So I will enter the country on a K1-Visa, and will get a work permit after the wedding, possibly earlier. I'm an Industrial Engineer in Electro-mechanics (4 years, Master), so my...