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The pressure is 1480psig. The torque to operate the valve is high due to the application and seat materials.

SJones, the material is used for a valve stem, which requires 105 ksi.

Hi SJones, I did look into some super duplex stainless steel, but strength did not meet the requirement(105k Ksi). Like you have mentioned, they are mostly limited to 80Ksi. I will look into API Std 6ACRA.

EdStainless, I just read up on the materials you have mentioned. It looks like 725 has similar corrosion properties as 625 with higher strength, which per the document in my initial post would be suitable for rich amines service. I'm a bit confused on why in lean amines the material is not...

Edstainless, the reason for 718 is due to the strength. I need a material that has min 105K yield. The HT condition of the 718 in question would be solution treated and precipitation hardened per NACE MR-01-75.

Hi, Checking to see if Inconel 718 is suitable for amines service and if it does, any documentation to support it. I have seen some documentation stating that Inconel 625 is suitable for hot rich amines. Reference: https://www.sciencedirect.com/science/article/pii/S1876610217314613 | page 10

Graham, I believe the ASME standards forum might get you a better response :[link https://www.eng-tips.com/threadminder.cfm?pid=292]

What is the pressure on the wet side? A conically shaped seat would be the route I would take depending on the pressure you have on the wet side. Similar to a ball check valve.

SnTman, Thank you so much. That makes it much sense.

SnTMan, I do have copy of the Apx 2. The confusion for me is that Apx 2 shows in all integral flange figure that "g1" and "g0" is taken from the reference point of variable "B" but B is defined as the inside diameter of the flange and "g1 & g0" is defined as the thickness of the hub. I could...

Thanks for the response The Obturator. What flange standard are you using or hoping to use? [This is custom flange I'm making, using ASME SECTION viii appendix 2 to design the flange.] These would all give you the relevant dimensions, including the holes information for fasteners etc. [ If I...

is this valve works in corrosive environment? [ If you check with them, they can advise on necessary coating or material selection for the corrosion ] if this valve being plug if process medium is not clean( works in dirty service)? [ The valve is mainly used in clean On-Off services, and...

Hi, I want to make sure my assumptions are correct, is it wrong what I have considered for my inside diameter for the flange value "B", and for the hub thickness "g0" and " g1"?.