- Posts: 29
- Thank you received: 0
Flange Insulation
- newdam07
-
Topic Author - Offline
- Junior Member
-
Less More
11 years 3 days ago - 11 years 3 days ago #8291 by newdam07
Flange Insulation was created by newdam07
If the line is insulated, we have to insulate the flange? I remember my supervisor told me when I was starting the that we don't insulate flanges. However, I read somewhere that there are times that we insulate flanges, so it got me confused. When are we supposed to insulate flanges?
Many thanks!
Many thanks!
Please Log in or Create an account to join the conversation.
- 11echo
-
- Offline
- Platinum Member
-
Less More
- Posts: 351
- Thank you received: 5
11 years 3 days ago - 11 years 3 days ago #6796 by 11echo
Replied by 11echo on topic Re: Flange Insulation
Insulating flanges depends on a number of issues! My time in Alaska ALL flanges are insulated, but now in the high desert of California I see a number of lines where none of the flanges on insulated lines are insulated. The piping/insulation spec that's been assign to the piping you're design dictates exactly what it is, how it's applied, & where ...the only time I can think of where it might be an issue for you is if that line where run in a pipe rack with other piping and you were calculating the pipe spacing! AND if that were the case I'd asked either your supervisor or the project engineer ...part of their job to know, or find out for you.
Please Log in or Create an account to join the conversation.
- Jop
-
- Offline
- Moderator
-
Less More
- Posts: 1053
- Thank you received: 14
11 years 3 days ago - 11 years 3 days ago #6797 by Jop
Do it once and Do it Right
Replied by Jop on topic Re: Flange Insulation
You may have a case on mixed communication.
1.) There is a product called an "Insulation Flange Kit" It has nothing to do with Hot or Cold Insulation.
See here:
www.google.com/imgres?imgurl=htt ... Ag&dur=801
This product is used break the flow of stray current in a line that runs underground and then rises above ground. This stray current causes corrosion that eats the pipe on cooling Water Lines or any other product.
2.) Hot Insulation for Steam or other high temperature applications it is the normal practice to Not insulate the Flanges or Valve Bodies.
3.) Cold Insulation for cryogenic services it is the normal practice to insulate EVERYTHING even a horizontal Dummy Leg (Trunnion) support in the pipe rack. The length of the Insulation on such a support would be Minimum 4 times the thickness of the support on the pipe (if the Cold Insulation is 100mm thick then the trunnion would be insulated for a minimum distance of 400mm)
1.) There is a product called an "Insulation Flange Kit" It has nothing to do with Hot or Cold Insulation.
See here:
www.google.com/imgres?imgurl=htt ... Ag&dur=801
This product is used break the flow of stray current in a line that runs underground and then rises above ground. This stray current causes corrosion that eats the pipe on cooling Water Lines or any other product.
2.) Hot Insulation for Steam or other high temperature applications it is the normal practice to Not insulate the Flanges or Valve Bodies.
3.) Cold Insulation for cryogenic services it is the normal practice to insulate EVERYTHING even a horizontal Dummy Leg (Trunnion) support in the pipe rack. The length of the Insulation on such a support would be Minimum 4 times the thickness of the support on the pipe (if the Cold Insulation is 100mm thick then the trunnion would be insulated for a minimum distance of 400mm)
Do it once and Do it Right
Please Log in or Create an account to join the conversation.
- 11echo
-
- Offline
- Platinum Member
-
Less More
- Posts: 351
- Thank you received: 5
11 years 1 day ago - 11 years 1 day ago #6800 by 11echo
Replied by 11echo on topic Re: Flange Insulation
JOP ...I have to disagree with you on this one, I see personal protect insulation used on every aspect of a heated line that can come into contact with operating personnel. In cold climates I've seen steams line totally jacketed in insulation to conserve every degree of heat, And here locally (more arid high desert) when we use heat conserving insulation I "semi" routinely see laced on insulating blankets used on valving.Jop... 2.) Hot Insulation for Steam or other high temperature applications it is the normal practice to Not insulate the Flanges or Valve Bodies.
Please Log in or Create an account to join the conversation.
- Er.piping
-
- Offline
- Junior Member
-
Less More
- Posts: 36
- Thank you received: 0
10 years 11 months ago - 10 years 11 months ago #6809 by Er.piping
Replied by Er.piping on topic Re: Flange Insulation
In my opinion the criteria for insulating and or not insulating the flange joint depends on factors like
1 . Location of the plant.
2 . If the line is Hot insulated, flange joint kan be kept un-insulated.
3 . If line is carrying cryogenic fluids, then everything including pipe, valves, fittings, flange joints and piping supports(Dummy, Shoe) needs insulation to avoid ice formation.
1 . Location of the plant.
2 . If the line is Hot insulated, flange joint kan be kept un-insulated.
3 . If line is carrying cryogenic fluids, then everything including pipe, valves, fittings, flange joints and piping supports(Dummy, Shoe) needs insulation to avoid ice formation.
Please Log in or Create an account to join the conversation.
Moderators: Jop
Time to create page: 0.221 seconds
