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Dear jop and all,

Finally I got answer from one of my boss,

Actually the ball valve has to come first, then globe valve.
Reason 1. Globe valve is suspect for leakage so it come second,
Reason 2. Ball valve easy to operate even in high pressure when we compare with globe valve, so the ball it come first.

[ashokaa]

Dear jop and all,

Finally I got answer from one of my boss,

Actually the ball valve has to come first, then globe valve.
Reason 1. Globe valve is suspect for leakage so it come second,
Reason 2. Ball valve easy to operate even in high pressure when we compare with globe valve, so the ball it come first.

[ashokaa]

Ok jop,

i will check and come back to you,

[ashokaa]

Ok jop,

i will check and come back to you,

[ashokaa]

Thanks Crashtested and Jop,

Jop,
yes the P&ID shows two (globe and ball ) valves, i used many times in the Piping, I noted the in my note book that globe vale will comes first, but i forgot the reasion,

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Thanks Crashtested and Jop,

Jop,
yes the P&ID shows two (globe and ball ) valves, i used many times in the Piping, I noted the in my note book that globe vale will comes first, but i forgot the reasion,

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Thanks Job and Echo

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Thanks Job and Echo

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Yes My friend you are right…

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Dear GPSVN,

I don’t know the flare header pressure, but it was accepted by the Client,
Anyway i will check with Process Group.

Ya.. i modified with Stainless steel flange and carbon steel vale like what you suggested earlier.

Thanks for your all answers. Keep it up.

[ashokaa]

Dear gpsvn, Thanks For your Reply.

Yes this vessel working pressure is 200barg, The Upstream of PSV Ratting is 1500# SS, Downstream of PSV Ratting is 300#.

1. I asked the Qustion because is Flange (CS) already purchased.

Thanks,

Happy New Year…

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Jop,

This is for your information,

The Line Size is 3″,
Pipe Schedule is 10S,
Operating pressure is 200 Barg,
Operating Temperature is 37.5 Deg. C,
Installation country is Brazil,
Code B31.3,
This is a Flare Header of one module.
The valve Ratting is 300# and pipe is 150#.

gpsvn,

Thanks for your suggestion, I am also thinking like what you suggest,
I asked the qustion because to know the Difficulties of CS&SS welding.

One more.. i have one qustion, If i go through your suggestion..
The SS Flange (300#) Schedule is 40S (73mm I/D) and Pipe is Schedule 10S (83mm I/D), I faced this type of problem (missmatching Schedule) some times, I don’t know how to weld in fabrication shop, Just i followed the Piping Spec. Please Advise me….

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Hi gpsvn,

The Clients agreed to go through Ameron Products.
Now i have smithfiberglass & Ameron Catalog for GRP. Thanks for all…..

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Thanks my friends,

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Thanks Mr.Jop,

Now My confusion Is clear.

[Author]

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