3 replies to this topic

[papaya]

Would like to know if we have the process data, how do we go ahead with choosing the right material of construction for valves?

Like seat & seal I believe we can judge from flow pressure etc, but what about corrosion, errosion etc?

So far like body construction common materials are Carbon Steel 104N, SS316, SS316L, some even go up to Duplex, Super Duplex, Inconel.

Seat & Seal normal ones are Viton A & B, Elasto-lion, PTFE.

Is there a guide line on how to select the appopriate materials, and how to tell which one is better than which since different material reacts differently under different conditon, but like SS316 have higher corrosion than CS but has less strength, but Duplex is better overall than both, is there a ranking for common steel materials?

[ankur2061]

Papaya,

A free download of the Standard 'Norsok L-001' will give you all the answers for valve selection. Norsok standards are some of the best standards for the petroleum industry, although specifically meant for the off-shore petroleum industry they are also very much applicable for the on-shore petroleum industry.

The following link will lead you directly to the valve selection section of the above mentioned standard:

http://www.standard....M.htm#TopOfPage

This is a fairly good guide for valve selection. Hope you get your answers.

Regards,
Ankur.

Edited by ankur2061, 06 October 2009 - 09:16 AM.

[daryon]

Hi,

NORSOK M-001 is a good start for selecting materials too.

I also recomend the Valve Selection Handbook, 5th Edition, by Peter Smith & R.W. Zappe. "Engineering Fundementals for selecting the right valve deisgn for every industial flow application"

Edited by daryon, 07 October 2009 - 08:35 PM.