RE: 90.08 degree elbow?

From: <Steve>
Date: Fri Sep 17 2004 - 02:42:00 EDT

Hi liu_chunyang

if it is a boiler blowdown line or other two phase blowdown line, elbows are not such a good idea. Sweep bends and laterals are normally used to ease the passage of high velocity water. With elbows and tees, there will be very high shock loads at the points of sudden direction change.

Cheers

Steve

-----Original Message-----
From: liu_chunyang [mailto:pds3d@shaw.ca] Sent: Friday, September 17, 2004 3:50 PM To: <a href="/group/PipingDesign/post?postID=Jvl1gBlvuJpoqRVyhelxc9uOLBkTFGtyT9rhMwixL_2nk_PcTmDeG_WKNsJaHTXxuU4AAgsuisBD8m-Rlaxxi94xUtMu">PipingDesign@yahoogroups.com</a> Subject: [PipingDesign] 90.08 degree elbow?

Dear all, I'm designing a blow down line, it is from low level to piperack on high level, there will be a 90 elblow between the riser and sloping header on the piperack, in Rebis this elbow is 90.08 degree (slope 2" per 100'), of course there is no such elbow. my question is: in the real world, can this be done? if so how they do it?

simalar question, in real world, how do they build sloping line with socket weld fitting? of course they can't cut socketweld elbow.

please help

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