- Posts: 1
- Thank you received: 0
Assembling flanges with different schedule
- Wobster
-
Topic Author - Offline
- New Member
-
Less More
12 years 6 months ago - 12 years 6 months ago #8145 by Wobster
Assembling flanges with different schedule was created by Wobster
Hi,
I've long wondered what would happen if you join two flanges with different schedule.
Example:
Assemble a 4" CL300 B16.5 Sch-10S flange with a 4" CL300 B16.5 Sch-40S flange.
A gasket designed for the lower schedule should work right?
Depending on the direction of the flow we would get alot of turbulence here.
Regards
I've long wondered what would happen if you join two flanges with different schedule.
Example:
Assemble a 4" CL300 B16.5 Sch-10S flange with a 4" CL300 B16.5 Sch-40S flange.
A gasket designed for the lower schedule should work right?
Depending on the direction of the flow we would get alot of turbulence here.
Regards
Please Log in or Create an account to join the conversation.
- Jop
-
- Offline
- Moderator
-
Less More
- Posts: 1053
- Thank you received: 14
12 years 6 months ago - 12 years 6 months ago #6464 by Jop
Do it once and Do it Right
Replied by Jop on topic Re: Assembling flanges with different schedule
Wobster,
You have not provided a lot of information so it would be hard for anybody here to offer any real advice (commodity, operating pressure, upstream objects, downstream objects, sketch, etc).
All that said, the conventional wisdom for your case says:
a. use a schedule 10S flange on both sides.
b. taper bore the joining (sch 40S) pipe or fitting to match the sch 10S flange
You have not provided a lot of information so it would be hard for anybody here to offer any real advice (commodity, operating pressure, upstream objects, downstream objects, sketch, etc).
All that said, the conventional wisdom for your case says:
a. use a schedule 10S flange on both sides.
b. taper bore the joining (sch 40S) pipe or fitting to match the sch 10S flange
Do it once and Do it Right
Please Log in or Create an account to join the conversation.
- LenS
-
- Offline
- New Member
-
Less More
- Posts: 6
- Thank you received: 0
12 years 6 months ago - 12 years 6 months ago #6465 by LenS
Replied by LenS on topic Re: Assembling flanges with different schedule
by default the ID of the gasket = OD of the pipe. therefore for your 4" pipe example, the ID = 4" and no need for special gasket re different pipe schedules
Please Log in or Create an account to join the conversation.
- Jop
-
- Offline
- Moderator
-
Less More
- Posts: 1053
- Thank you received: 14
12 years 6 months ago - 12 years 6 months ago #6486 by Jop
Do it once and Do it Right
Replied by Jop on topic Re: Assembling flanges with different schedule
LenS,
I am not sure what you are implying by your comment, however the I.D. of the Gasket is not the critical issue with Wobster's question.
Thanks for your comment anyway.
I am not sure what you are implying by your comment, however the I.D. of the Gasket is not the critical issue with Wobster's question.
Thanks for your comment anyway.
Do it once and Do it Right
Please Log in or Create an account to join the conversation.
- LenS
-
- Offline
- New Member
-
Less More
- Posts: 6
- Thank you received: 0
12 years 6 months ago - 12 years 6 months ago #6216 by LenS
Replied by LenS on topic Re: Assembling flanges with different schedule
hello jop....regards his comment..."A gasket designed for the lower schedule should work right?"...is not an issue
Please Log in or Create an account to join the conversation.
- Jop
-
- Offline
- Moderator
-
Less More
- Posts: 1053
- Thank you received: 14
12 years 6 months ago - 12 years 6 months ago #6217 by Jop
Do it once and Do it Right
Replied by Jop on topic Re: Assembling flanges with different schedule
LenS,
You wrote:
"by default the ID of the gasket = OD of the pipe. therefore for your 4" pipe example, the ID = 4" "
Part of your statement is correct and part of your statement is not correct.
Correct: "by default the ID of the gasket = OD of the pipe"
Not correct: "therefore for your 4" pipe example, the ID = 4"
The correct ID for a 4" Class 300 Gasket is 4.5" (the same as the pipe OD)
I am sure it was just a slip of the finger.
You wrote:
"by default the ID of the gasket = OD of the pipe. therefore for your 4" pipe example, the ID = 4" "
Part of your statement is correct and part of your statement is not correct.
Correct: "by default the ID of the gasket = OD of the pipe"
Not correct: "therefore for your 4" pipe example, the ID = 4"
The correct ID for a 4" Class 300 Gasket is 4.5" (the same as the pipe OD)
I am sure it was just a slip of the finger.
Do it once and Do it Right
Please Log in or Create an account to join the conversation.
Moderators: Jop
Time to create page: 0.220 seconds
![facebook](https://www.facebook.com/sharer/sharer.php?u=http://pipingdesigners.com/forum/the-technical-forum/1552-assembling-flanges-with-different-schedule&picture=http://pipingdesigners.com/images/Logo.jpg&title=Piping%20Designers%20.%20com%20-%20Assembling%20flanges%20with%20different%20schedule%20-%20The%20Piping%20Designers%20Forum&description=Hi,%20I've%20long%20wondered%20what%20would%20happen%20if%20you%20join%20two%20flanges%20with%20different%20schedule.%20Example:%20Assemble%20a%204"%20CL300%20B16.5%20Sch-10S%20flange%20with%20a%204"%20CL300...&caption=pipingdesigners.com){kind=link}
