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Dear Rao,

Basically Ammonia is a refrigerant. It is

still used as a refrigerant for commercial refrigeration plants . The occurrence

of ice formation is due the Joule’s Thomson effect “ Whenever

a gas under pressure is allowed to pass through an orifice it falls in

temperature”.

There must some condition existing where there

may be a throttling valve provided so that it act as a orifice. At up stream side

the pressure may be high , as the multiple ammonia gas cylinders are connected,

& at down stream side it is comparatively low ,as lower pressure is required

( a process requirement.).

Tell me whether the ice formation is on

pipeline after control valve? If so then the control valve act as a throttling

valve / orifice. If the ice formation immediately after the cylinders connected

to the pipelines then the cylinder regulator is acting as a orifice.

The solution to avid the ice formation is

to provide strong cold insulation like thermacol, etc & balance the

pressures ( upstream & downstream ) to avoid the throttling effect.

Regards,

Vishwanath

Kapshikar

Safety Engineer

Mobile:

Address :

Saudi Arabian Fabricated

Metals Industry Co. Ltd.

P.O.Box 328

Al-Khobar

Saudi Arabia 31952

Tel.:

03-882 7068 / 7235 ,Fax: 03-882 5193

E-Mail: vishwanath.kapshikar@...,

Website: www.safami.com

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Dear Moderator pls.

unsubscribe me from the group.

MKS

[Guest guest]

Sorry hit the unsubscribe button by accident I never wanna do that!!!! Laurie

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