Is PWHT required for Cladding ?
Is PWHT required for Cladding ?
(OP)
Hi Friends,
We are doing cladding on CS materials , having thickness more then 19.05 mmm.
There is PWHT requirement for Butt weld but "Is PWHT required for Cladd welding also"?
If required then which code is recommending for this.
Kindly help !
Thanks
We are doing cladding on CS materials , having thickness more then 19.05 mmm.
There is PWHT requirement for Butt weld but "Is PWHT required for Cladd welding also"?
If required then which code is recommending for this.
Kindly help !
Thanks





RE: Is PWHT required for Cladding ?
RE: Is PWHT required for Cladding ?
RE: Is PWHT required for Cladding ?
RE: Is PWHT required for Cladding ?
Its B 31.3 , we are following.
RE: Is PWHT required for Cladding ?
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RE: Is PWHT required for Cladding ?
RE: Is PWHT required for Cladding ?
RE: Is PWHT required for Cladding ?
Issue is , for cladding which code is recommending for PWHT ?
and IT is Required if we are meeting the hardness requirements ?
RE: Is PWHT required for Cladding ?
ASME B31.3 323.4.3 Cladding and Lining Materials....
(d) Fabrication by welding of clad or lined piping
components and the inspection and testing of such components
shall be done in accordance with applicable
provisions of the BPV Code, Section VIII, Division 1,
UCL-30 through UCL-52, or the provisions of Chapters
V and VI of this Code, whichever are more stringent.
RE: Is PWHT required for Cladding ?
I got following -
(a) Vessels or parts of vessels constructed of base material
with corrosion resistant integral or weld metal overlay
cladding or applied corrosion resistant lining material shall
be postweld heat treated when the base material is required
to be postweld heat treated. In applying these rules, the
determining thickness shall be the thickness of the base
material.
When the thickness of the base material requires postweld
heat treatment, it shall be performed after the application
of corrosion resistant weld metal overlay cladding or
applied corrosion resistant lining unless exempted by the
Notes of Table UCS-56.
RE: Is PWHT required for Cladding ?
(c) for welded joints of all thicknesses if required by UW-2, except postweld heat treatment is not mandatory under the conditions specified below:
(5) for corrosion resistant weld metal overlay cladding or for welds attaching corrosion resistant applied lining (see UCL-34) provided
preheat to a minimum temperature of 200°F (95°C) is maintained during application of the first layer when the thickness of the
pressure part exceeds 11⁄4 in. (32 mm).