7/24/2019 GAS CHANGE C4 TO C3

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1]. PROCEDURE FOR CHANGING BUTANE TO PROPANE TANK :

CASE : 1 / Changing all tank t! C".

Consider initially with 3no tanks propane and 1 tank to Butane and we want to change all tanks to propane.

OBJECTIVE : BT!"E #$!%% BE &'(E& !"& )!# C$!")E T$E T!"* TO (+O(!"E.

I"ITI!%%, : C3 In "o -3 / 0 tanks and C0 in "o.0 tank.

I"!%%, : C3 in "o 1-3/0 tanks.

(+OCE&+E: STEP: 1 .#(!+)I") !"& 2!+'I")STEP.# . )!# EC$!")ESTEP." .COO%I") T$E T!"*

STEP: 1 .#(!+)I") !"& 2!+'I")

1. Connect a hose to the li4uid 5ani6ols on either side and line up the 7al7es acoordingly with the

intention o6 du5ping the 7apour 6ro5 "o.3 tank.

-. #et "o.1 / - co5pressors on hot gas 5ode.se -nos co5pressers 6or a sinle tank 6or sparging

and heating .3. &raw C0 7apors 6ro5 "o.3 tank to the co5pressures "o.1 / - and return the hot gases to the

sa5e tank 8y the hot gasline.

0. this will heat up the li4uid generate 7apor and 8uild up pressor.9. 2hen the pressure reaches to .-8ars open the li4uid 5ani6old 7al7e 8y -9; and release the gas

till the pressure reaches to .1-8ars.

change is not a continuous process. 2e will ha7e to 8uild up the pressure in "o.0

tank and when there is a pressure di66rence a8out .98ars 8etween "o.3 and "o.0 tanks then only

the 7apour 7ale to the "o.3 tank shall 8e opened.9. Through out the this gassing operation the (ropane ? Butane shall 8e checked at 7atoius heights at

regular inter7als using the TOC!'ETE+.

ceed the cooling rate 8y 19 OC?hr.0. !6ter cooling the "o.3 tank trans6er the re4uired 4uantity o6 the coolent 6ro5 other tanks 8y

using the hot gas line.