Sare Ralph replied:
2. Why do we provide Rod on the sleeper/rack for simple resting support?
You can not install a rod hanger on a sleeper (really you can't).
Basically,
the pipe (welded on a pipe shoe/saddle) is just resting on the pipe rack
(again no rod). However on some plant it is allowed to support a small bore
pipe (sometimes conduit too) using the large bore pipe via a rod/clamp
hanger system.
But here, Rakesh was not referring to install the Rod Hanger on the Sleeper/rack but an MS rod which is laid horizontally along the sleeper length and placed centrally along the width of the sleeper/rack. The typical dia of this rod is 20mm, the length will be nearly same as the width/span of the Sleeper/Rack. Now, in this case the Pipe rests on this rod indeed. This specification where this rod arrangement is provided are used in some of the plants and preferred by some engineering consultants. The reason of providing this rod could be to reduce the contact surface area of pipe with the sleeper/rack. Why this contact is to be reduced can be thought of eg. reduction of friction as it is felt by many that friction is area dependent to some extent. This also reduces contact of Pipe with other materials which may provide with a potential for setting in the phenomenon of corrosion of pipe.
RRR Received on Thu May 02 05:15:00 2002
This archive was generated by hypermail 2.1.8 : Mon Oct 27 2008 - 20:23:56 EDT