2 replies to this topic

[Musab Ammad]

Hello everyone!

i would like to have your experienced comment on a problem i am going to face sooner.
In a recent project we designed heavy naptha and kerosene treatment unit for a client.

The problem revolves around the drainage system of this unit. i want to calculate the height of seal to protect the sloped line in fire case. I don't have any past experience about designing a seal of drainage system.

There are seven vessels in this treatment unit. Each vessels drain size is 2". the flowrate i assumed of draining each vessel is 56 USGPM, the main header line is of 6". The length of line to API sewer is about 17 meters.the slope i used is about 1:100.

The Vapor pressure of hydrocarbon is 1.982 psia @ 125 C and 150 bar.

i used a basic formula for height calculation

P= rho * g* H,

but i am very sure that there should be another way to calculate this seal leg height.

since i will be ask to determine this height later, for sake of time saving. i would really appreciate if some one can give me an insight / helpful comment/ experience of seal leg designing now.


regards,

Ammad khan

[Shivshankar]

Ammad,

Ahmad Khan,

If go through past thread, below

http://www.cheresour...eal-leg-height/

Read the graham232.pdf provided by briezh.

Hope this help you.

Regards
Shivshankar

[Musab Ammad]

thanks shivshankar for your comment.

but my case is not about vacuum condensation.

it will be desired to provide a goose neck type seal, for preventing the fire in loop.
thanks i got one formula from the referenced link.

if i could have any good reference/practice about this i will be very grateful.


regards,