High pressure Steam

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17 years 2 months ago - 17 years 2 months ago #8574 by JacobsTim
High pressure Steam was created by JacobsTim
Hello

We have an high pressure line with Td= 510°c.
The material is P11.

Can we install a horizontal dummy?

Tim

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17 years 2 months ago - 17 years 2 months ago #3885 by Anton
Replied by Anton on topic Hi Tim, Can you clarify the
Hi Tim,

Can you clarify the question?

Service: Steam
Temp: 510 deg C
Material: ???? What is P11 ??

Is the Horizontal dummy (leg??) for support?

- If you're the smartest person in the room ... you're in the wrong room.

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17 years 2 months ago - 17 years 2 months ago #3886 by Jop
Replied by Jop on topic JacobsTim, The answer to your question
JacobsTim,
The answer to your question is "Yes" as long as it is done right.
You (and others) will ask "What is right?"
We would need a lot more information about your situation before we could answer that.
With that said you might try this.
Replace the elbow with a TEE. On the other (straight through) end of the TEE add a meter of pipe the same material and spec as the pipeline. This pipe extension becomes your "Dummy" support. Cap the end of the pipe.

Do it once and Do it Right

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17 years 2 months ago - 17 years 2 months ago #3887 by JacobsTim
Replied by JacobsTim on topic Hi Tim, Can you clarify the

Hi Tim,

Can you clarify the question?

Service]

Hello

Material of pipe is ASTM A 355 gr P11 Chrome Molybdenum Sch 160
We want to install a horizontal dummy leg onto an elbow of +-1m.

Kind regads

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17 years 2 months ago - 17 years 2 months ago #3888 by Jop
Replied by Jop on topic P 11 is a much
P 11 is a much broader catagory than you may think.
It is defined as follows:
www.gowelding.com/wp/pnumbers.htm
P-number - Material
11A Gp 1 - 9 Nickel Steels
11A Gps 2 to 5 - Mixed bag of high strength low alloy steels.
11B - 10 Sub Groups:- Mixed bag of high strength low alloy steels.

So which one are you using?
And
What size are you talking about?

Do it once and Do it Right

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17 years 2 months ago - 17 years 2 months ago #3889 by KJC
Replied by KJC on topic The real answer to your
The real answer to your question is NO it is not advisable with the chrome moly piping to add in dummy legs for support, 2 main reasons is cost and cost!!!! PWHT is expensive and so is P11 / P91 piping, The norm is to add lugs and then use support brackets of varying designs

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