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I have existing boiler (4MMBtu/hr), and the condensate return from the Process side is going directly to Boiler Feed Water Tank. Plant is not in use since last couple of years and client is planning to start the plant. It is a small boiler so it doesnt have deaerator. The concern is from the...

I need to size the Emergency vent based on API 2000, however, the properties of the material is not known. It is non-flammable fluid but the properties of the material is not known. Can anyone suggest me the reference page where API-2000 / NFPA 30 states that one can assume Hexane and use the...

I have 5 SS and 1 FRP tank, and all of them are sharing common dike. All the tanks are indoor and materials are non flammable. All the tanks have conservative vent designed for pump in/out and thermal effect. It is not designed for emergency vent. I was planning to provide Emergency vent on...

I have ATM Fiberglass tank. I was wondeing if I need to provide Emergency vent for Fire case on Fiberglass tnak. Your insight/thoughts are welcome.

Pennpiper, I have already prepared the P&ID but I am not sure if 6" Steam and 4" condensate header can be used for small flow of 1500 lb/hr. As it is for a batch process, flow variation is big (1500 lb/hr to 13500 lb/hr). There will be cases where plant will require only 1500 lb/hr of steam.

My Steam requirement varies from 1500 lb/hr to 13500 lb/hr. Based on 13500 lb/hr flow I am considing 6" steam header and 4" condensate header. For 6" line and 1500 lb/hr flow I am getting velocity of 7 ft/sec which is lower side for the steam line sizing criteria. I was just wondring if I can...

I have steam/water Shell and Tube exchanger and my flowrate for steam is 6500 lb/hr and water is 55,000 lb/hr. I would like to have your inputs for the desired location for Water and Steam. As water flowrate is higher, I thought of placing the water at shell side.

I have an application to "Top offload" viscous chemical (1600cP) from the Rail car and the pump is located at the Grade. The elvation of the bottom of the rail car and highest point of the loading arm is 20ft. Is it possible to have gear Pump which unload the material without pressurizing the...

In my case, cold side Inlet T: 25C and outlet T: 45C, and Hot side Inlet T: 75C and outlet T: 55C. I checked that temperature approach is more than 10F (per article publisehd in cheresources.com); but LMTD for counter current flow comes 0. Do I have to consider parallel flow? Another...

Hi, I am performing exchanger design and found that my LMTD is zero as my heating and cooling flow are same. Does it mean that the design is not correct? Thanks!

For batch operation, Is it required to have minimum flow line for centrifugal pump? The pump is used intermitently to transfer the material.

API 650/12F

Greenche, Is it also applicable to API 2000?

I found following statement from one of the chemical engineering forum: "API2000 standard basically supports the following emergency vent exceptions: EXCEPTION #1: Emergency venting for fire exposure is not required if the tank is larger than 12,000 gallons US and...

For one of the storage tank (non flammable material- Flash pt >200F) has the capacity of 29000 Gallon (100,000 Liter). I have sized the normal vent for breathe in/out, which is atmospheric vent with bird screen. I would like to know if i have to design the Emergency vent for this tank for fire...