INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

seal face material selection.

seal face material selection.

(OP)
Dears,

I have a query regarding seal face material. As per api 682 3rd edition , there a table B.2 which shows maximum temperature limit of faces. so as per table 425 degree is maximum limit.
If my pump fluid temperature is around 600 or 700 degree in that case what will be my face material?

Is there any other materials available in the market which can sustain more than 600 or 700 degree temperature?

Thanks in advance.

RE: seal face material selection.

When you get to those temperatures you can't use elastomers. So you need to use something like a metal bellows seal, Eagleburgmann and John Crane are 2 good suppliers

RE: seal face material selection.

(OP)
Thank you sir for your reply.

Agreed. For high temp we can not use elastomers. we go for metal bellows. but sir what about seal faces?

Which material should we go for seal faces?

Thanks in advance.

RE: seal face material selection.

What fluid are you sealing?

RE: seal face material selection.

probably Silicon Carbide, but like the previous post says it depends on the fluid you are sealing

RE: seal face material selection.

(OP)
Pumps are - Heater Recycle pumps & Fluid name is - Hydrocarbon.

Pumping temp is 360 (Normal) & 425 (Max)
Vapor pressure is - 0.04
Specific Gravity is - 0.831.

RE: seal face material selection.

Silicon Carbide or Tungsten Carbide should be fine

RE: seal face material selection.

Is that vapor pressure right? Hard to tell with no units. What is viscosity, that is also important, may determine if you use hard/hard or hard/soft face combination.

RE: seal face material selection.

(OP)
Pumps are - Heater Recycle pumps & Fluid name is - Hydrocarbon.

Pumping temp is 360 (Normal) & 425 (Max)
Vapor pressure is - 0.04 kg/cm2a
Specific Gravity is - 0.831 @ 360C
Viscosity - 1.03 cP @ 360C.

Yes vapor pressure is correct.

RE: seal face material selection.

Dears,
For named conditions most suitable material is SiC + Metal bellows from stainless steel.
Suppliers much.
This is assuming that no thermal and mechanical shocks
If there are oft thermal shocks, the silicon carbide is quickly destroyed.
It is understood that the polymers, even modified, are not suitable.
The next option in the absence of mechanical shocks - quartz glass, has excellent resistance to thermal shock, good hardness and satisfactory compressive strength.
In the presence of thermal and mechanical shocks should only use stainless steel (nickel alloy) with a non-porous ceramic coatings, such as chromium nitride etc.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close