Dear All,
My question may be classified as an irrelevant one to
this group as it is more or less related to pressure
vessel fabrication rather than piping.However as I
have not find any alternative at present but to ask
this question in this forum. Please forgive me and
allow me to ask this question.
We have a carbon steel vessel which is cladded
internally with stainless steel( the cladding was done
by explosion bonding).Our client specification states
that anything welded to the inside of a cladded vessel
shall be attached to the base metal(carbon steel)after
peeling off the cladding and the area from where the
cladding has been removed shall be filled with weld
deposit.My question is that "is it really necessary to
weld the relative light weight components like tray
support ring to the base metal after peeling off the
cladding which has been integrally bonded to the base
metal by executing a metallic bonding during cladding
operation?Also the bond shear strength of the clad
metal has been established by bond shear test and the
same is many times greater than that required to hold
the tray support ring together with the trays and the
entrained fluid as can be demonstrated by calculation.
On the contrary removal of clad metal will lead to an
area prone to more corrosion in addition to the
undesierable chemistryand hardness produced at the
weld deposited area.
I hope the experienced engineers in this forum will
give more insight to elaborate my above explanation
and in turn help me to convince our client in this
matter.
thanking You in advance.
regards,
ranjit.
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