3 replies to this topic

[kyo2355]

Stripper BTM pump is running at 300'C. That's why we should warm-up pump in order to switch pump.

Now the arrangement of warm-up line is quite different with general ones.

Its composition is same. It has restriction orifice and glove valve.

 

But line connection is different.

General warm-up lines are connected from discharge line to discharge line and just bypass discharge check valve.

But our stipper BTM pump is connected to casing directly.

 

As I know, the purpose of warm-up line is to warm-up casing. So, I think it doesn't matter at all.

The dead discharge line is also very small(0.07m3) than normal flow (200m3/hr).

When the cold fluid contacts high temperature outside(300'C), fluid is just expanded to 0.09m3.

 

I'd like to know we should change the tie-point of warm-up line from casing to discharge line.

[Bobby Strain]

I would talk with the plant operators.

 

Bobby

[Napo]

Kyo2355,

 

If you pump is hot and you don´t have other problem, then you connection is Ok.

 

Check mechanical seal. By security you must write an operational proceduce for this pump.

 

Napo.

Edited by Napo, 13 July 2015 - 03:02 PM.

[AHT]

Is yours and end-suction pump, with an inlet nozzle larger than 14, or a "all-top" oriented pump? Is it a multi-stage pumps? All of these are normallt provided with the warm-up arrangement that you have described.

 

Why do you want to change the existing wrm-up set-up?