Guys
I don't know if your codes allow, but I normally put a "set" in the pipe
by shrinking the lower side of the pipe. This is done by heating a 180
degree band on the under half of the pipe next to the socket, and then
cooling it fairly quickly.
On less fussy pipe we just hit it with the "ahem" "pipe bender".With
stainless you will need to read the book first, to avoid any nasties
like carbide precipitation, but it works fine with CS. Ask your friendly
pipefitter.
Saves all this mess with grinding.
Cheers
Steve
-----Original Message-----
From: Misra Kuldeep SPEL-T1 [mailto:kuldeep.misra@siemens.com]
Sent: Monday, October 25, 2004 9:27 PM
To: 'PipingDesign@yahoogroups.com'
Subject: RE: [PipingDesign] Q&A Time: Socketwelded Piping Slopes
First place the supports according to required slope and than lay piping on these supports and there will be no dead pockets.
regards,
Kuldeep
-----Original Message-----
From: Sajit Viswan [mailto:sviswan@tebodin.co.om]
Sent: Monday, October 25, 2004 1:10 PM
To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] Q&A Time: Socketwelded Piping Slopes
The required slope will not come by the sag of the line. The sag will only create a dead pocket.
Sajit
-----Original Message-----
From: Misra Kuldeep SPEL-T1 [mailto:kuldeep.misra@siemens.com]
Sent: Monday, October 25, 2004 9:30 AM
To: 'PipingDesign@yahoogroups.com'
Subject: RE: [PipingDesign] Q&A Time: Socketwelded Piping Slopes
Generally socket welds are used in small bore piping. For long run pipes there is no need to cut the sw elbows. Slope can be provided in these small bore lines at the time of supporting in erection. Required slope surely will come due to piping weight and flexibility of small bore lines.
Regards,
Kuldeep
-----Original Message-----
From: Al [mailto:alwynk@shaw.ca]
Sent: Monday, October 25, 2004 12:27 AM
To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] Q&A Time: Socketwelded Piping Slopes
good question.
if the fabricator knows there has to be a slope he does not press/insert the pipe fully into the recess of the socket weld. the slight gap due to the tolerance on the fitting allows a little angularity when inserted and the pipe tipped donw insiude the socket.
hence they dont like when you tell them there has to be a precise or minimum slope, they likely cant do it. Its approxinate and they put on what slope they can.
otherewise they have to grind a little (say 1/128) out of the socket with cylindrical grinder and/or take off the same amount off the inserting end of the pipe. Extra work.
-----Original Message-----
From: Paul Bowers [mailto:pbowers@pipingdesign.com]
Sent: Saturday, October 23, 2004 5:04 PM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Q&A Time: Socketwelded Piping Slopes
One thing I'd like to see on this list is more input from piping fabricators.
How are socketwelded lines sloped when it comes to a 90 degree elbow? A SW ell cannot be cut back like a BW one, and the tolerance of the fit is probably not enough to allow "fudging".
So how is it done?
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