FYI
FROM B31.4 - 2002
434.7.1 Bends Made From Pipe
(u) Bends shall be made from pipe having wall
thicknesses determined in accordance with para. 404.2.1.
When hot bends are made in pipe which has been cold
worked in order to meet the specified minimum yield
strength, wall thicknesses shall be determined by using
the lower stress values in accordance with para.
402.3.1 (d).
(b) Bends shall be made in such a manner as to
preserve the cross-sectional shape of the pipe, and shall
be free from buckling, cracks, or other evidence of
mechanical damage. The pipe diameter shall not be
reduced at any point by more than 2 1/2% of the nominal
diameter, and the completed bend shall pass the specified
sizing pig.
(c) The minimum radius of field cold bends shall
be as specified in para. 406.2.1(b).
(ci) Tangents approximately 6 ft (2 m) in length are
preferred on both ends of cold bends.
From: eduardocalva@hotmail.com
To: materials-welding@googlegroups.com
Subject: RE: [MW:8645] Mechanized welding process and pipe ovality
Date: Thu, 9 Dec 2010 08:36:01 -0600
Thanks Alexis, could you please give me the paragraph of ASME B31.4?
Eduardo Calva
From: alexis_viteri@hotmail.com
To: materials-welding@googlegroups.com
Subject: RE: [MW:8616] Mechanized welding process and pipe ovality
Date: Wed, 8 Dec 2010 22:49:32 -0500
Eduardo,
Look for in ASME B31.4, there is the tolerance for ovality.
The better way to inspect or verify the ovality is passing a wood circular plate inside pipes pipes, the diameter of the plate has to be the stablished according to the ASME B31.4 tolerance for ovality.
Thanks and regards
From: eduardocalva@hotmail.com
To: materials-welding@googlegroups.com
Subject: [MW:8610] Mechanized welding process and pipe ovality
Date: Wed, 8 Dec 2010 20:28:04 -0600
Dear all, I'd like to know what's the better pipes ovality tolerance in order to use a Mechanized welding process in pipelay?
And what's the better way to inspect or verify the ovality.
Thanks
Eduardo Calva
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
No comments:
Post a Comment