Hot Bend/Elbows

[Dj364]

Hello Every one,
I would like to have your thoughts about: using hot bends instead of elbows. ( on shore plant all diameters)
(Of course we have to make sure that the required wall thick doesnot change after bending).
what are advantages vs inconvenients..
Any commnets will be appreciated.
thanks.
Dj.

 

[GregLamberson]

Dj364

My thoughts on the matter, and this is from a pipeline perspective, not plant piping - I would only use induction bends if absolutely neccessary and I couldn't get by with cold (field) bending or if I had a tight spot and for some reason an elbow (5d, 10d) would not work, i.e. if you need a change in direction such as 70 degrees and a standard fitting just would not work.

The cost is the primary reason. Induction bends are not cheap.

Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website:

http://www.oil-gas-consulting.com

 

[C2it]

There are many firms in Europe offering induction bending of complex shaped spools incorporating several bends. The radius tends to be large ... 3d minimum and inclusion of the process needs to be considered from the start of the design process. It's common in piping within ship hulls due to the odd angles needed. As Greg says, it's not cheap, but economy of scale may reduce costs if done seriously in a large project.

 

[Dj364]

Greg,C2it thanks for replying.