Valve replacement

[Seba93]

I have a valve that has been failing continuously due to leakage of the seals, therefore would like to recommend a new valve as a replacement. Piping class: B1

The current installed valve has the following specs: Designed to API 6D / API 608
Body material: ASTM A-216 WCB
Ball Material: 316SS
Stem Material: 316SS
Seat Material: 316SS

I have two options available to choose from:

Option 1:
Body material: ASTM A105N
Ball Material: ASTM A182 F316
Stem Material: ASTM A182 F316
Seat Material: ASTM A182 F316 + Devlon Insert

Option 2:
Body material: A216 Gr. WCB
Ball Material: A276 Type 316 OR A351 CF8M
Stem Material: A276 Type 316
Seat Material: PEEK

Most likely option I would go with would be option 1 since Body material is an equivalent of A216-WCC which is more stringent than A-216 WCB and ASTM A182 F316 is a more stringent / Stronger / Similar material to 316SS however would like to see if I missed anything.

Appreciate any feedback.

 

[mk3223]

Note that A105N is a forged mater and A216 a coating material, which may be applied in the manufacturing process depending on the valve sizes.

Where's the "seal" leaking of the valve, and what's the root cause, i.e. corrosion, erosion, etc.?

 

[EdStainless]

Failure analysis first.
If you have been getting pitting of the ball and/or seat then neither of these will be an upgrade.

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P.E. Metallurgy, Plymouth Tube

 

[raaj6155]

Please clearly specify the service media with Working Pr & temp.

 

[Dhurjati Sen]

Dear Seba93,

Piping Class B1 ? Is this in Habshan, Abu Dhabi?

Regards.

DHURJATI SEN
Kolkata, India