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Conan21
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Join Date: Jan 2014
Location: Abu Dhabi - United Arab Emirates
Posts: 56

Material Selection

03/12/2014 6:08 AM

Hi Every one,

We have process water degasser in sour service in petrochemical plant. we in the way to replace it with new one. the vendor that who working in fabricate select the following material:

for Shell and head: ASME SA 516 Gr. 60N

for Nozzel Flanges: ASME SA 105N

for Nozzel Nick: ASME SA 106 Gr. B/ SA 516 Gr. N/ ASME SA 105N

for your experince and knowledge, are these material suitable for the vessel

Design DATA are as follows:

- Design Pressure: 51 psi

- Operating Pressure: 20 psi

- Design Temp: 205 F

- Operating Temp: 160 F

Regards and thanks

Thanks I got the answer..

please delete the thread.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: Material Selection

03/12/2014 6:19 AM

What does the facility's Standards Manual say about the materials to be used for such a purpose? After all, the contents of such a document hold far greater value than the collected opinions of a bunch of Anonymous Posters Miscreants! :-o

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Whitephone
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Join Date: Jan 2010
Location: Mineral wells Tx
Posts: 630
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#3
In reply to #1

Re: Material Selection

03/12/2014 6:20 PM

http://www.coleparmer.com/Chemical-Resistance
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#2

Re: Material Selection

03/12/2014 6:38 AM

Please confirm that the vendor has been provided with a copy of the relevant section of the facility's Standards Manual as part of the enquiry activity.

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Robert Johnson
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Join Date: Sep 2012
Posts: 20
Good Answers: 3
#4

Re: Material Selection

03/13/2014 9:04 AM

Conan.. ASME Section VIII will guide you in the design of the vessel. For the service, you should refer to NACE MR0175 as well. The SA 516 Grade 70 material you list for the shell and heads is adequate, but you should source the plate as HIC treated plate. It will be vacuum degassed and Calcium treated during melting to reduce Hydrogen induced cracking during operation. The material is readily available. Pressure vessels we furnish for H2S service are fully radiographed per UW-51 and fully post weld heat treated after all welding is complete. I hope this helps you in your design.
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