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I have been assigned a task to investigate possibility of "dry" load testing a 40 ton water chiller. The evaporator and condenser water piping to the chiller is being worked on and to avoid any surprises from a decade old shut down of chilled water plant and to do corrective maintenance work in...

I have to look into possibilty of dry load testing of a York chiller of a chilled water plant that has been shut down for ten years. Work is being done on piping and valves. To do work in parallel and to save time,if the 40 ton chiller can be load tested without introducing water in the...

Gas nitriding is performed in an atmosphere of Ammonia and dissociated ammonia (Hydrogen and Nitrogen) at high temperature (500-555 deg C).Is Hydgrogen embrittlement a problem during nitriding.If not why? Some references will be appreciated.

I want to know what type of pressure is the partial pressure of gas in Nitriding potential = (pNH3)/(pH2)^3/2. I mean is it static, dynamic or total pressure. Also how this pressure can be measured in a nitriding furnace for on line control of Nitriding potential. Link to references will be...

I wnated to know about the phenomenon of porosity formation in compound (white layer)of gas nitridied samples. Suitable references will be appreciated.

Hi, I am looking forward to find a reference that can answer the question whether there is a link between the characteristics of microstructure (white layer and general)to cooling rate at the end of a two stage gas Nitriding cycle. Any help will be greatly appreciated.

I am making a test cycle matrix for H-13 tool steel case- hardening using gas nitriding process.I need to know four possible values of nitriding potentials and three possible cylce times for a two stage Floe process that can result in suitable hardness values.Can anybody help or guide me to a...

I want to do circulation fan selection for a Gas nitriding furnace modification.I am looking for retention time of gases for different materials during heating/nitriding cycles of two stage Floe process.Can anybody help?

I want to get a quatitative measurement of hardness in the total case of a Nitrided specimen so that I can draw a profile and compare specimens on the basis of their hardness profile resulting from different Nitriding potentials and Furnace temperatures. Can anybody guide me?

I am looking for a Book named "A source book on Nitriding" published by ASM.It was a 1973 edition.I got an opportunity to look at it but does not know how to get one(Old or latest edition) for myself. Can anybody help?

I have heard people saying "When flow increases presssure decreases".I cannot understand it as, I believe that Pressure=Force/Area and when flow increases pressure should increase because force will increase. Please help.

What is leak detection valve?How its setting is specified like 1 G.R.H?

I want to know when Internal Floating roofs,External floating roofs and fixed roofs are used in Petroleum storage tanks.What is the selection criteria.Also what is the selection criteria for using different types of roof seals like Vapour mounted etc.

Dear Briand2 Can you show me the working of Pressure regulating valve with a drawing

How does apressure regulating valve works?How it lowers the pressure of 4500psi to about 15 psi in a scott air pack