8/10/2019 General- Welding Inspector
1/3
General
It is not a requirement for a welding inspector to be able to
weld, neither does a
welding inspector requirement an in depth knowledge of welding
engineering,
although some specic in these areas is essential. For certain
contracts it is also
necessary for welding inspector to have a good working knowledge
of other relatedsubject e.g. radiographic interpretation and post
heat treatment.
The presence of welding inspector during welding will almost
certainly reduce the
number of weld defect and metallurgical problems which could
otherwise occur,
which will in turn, reduce the overall number of failures in
service. hen an item
has failed, it usually means that cracking or fracture has taken
place.
There are many types of crack associated with welds, some of
which may initiate at
time of welding !process crack" or year later !in#service
cracks". In both these cases,
stresses, metallurgical problems and e$isting weld defects may
have contributed to
the cause of the cracking.
Duties of Welding Inspector
The main duty of welding inspector is to ensure that all the
welding and associatedactions aare carried out in accordance with
the welding specication!s" relevant tothe contract or work being
out.
It is important for welding inspector to know where to nd
relevant information,interpret the information and understand
it.
i. %uties prior to welding
ii. %uties during welding
iii. %uties after welding
%uties prior to welding
&. 'btain all relevant documentation or ensure access to
it(a. )elevant specication!s"b. )elevant procedures*c. +opies of
welders test certicates!where applicable"d. +opies of drawings
!where applicable"
. -nsure welder qualication
. +orrect material#type. +ondition , si/e!pipe0plate etc"1.
+orrect consumable#type. condition , si/e!ller material,gas,
inserts etc"2. +orrect equipment 3 certied where necessary.4.
+orrect preheat !whre applicable"5. 6ssess0measure t#up
a. )oot faceb. 7evel anglec. )oot gap
8/10/2019 General- Welding Inspector
2/3
d. 6lignmente. 8eam o9set !where applicable"f. :oint
cleanliness
;. -nsure no undue stress is applied to the joint
%uties during welding (
&. +heck amperage, voltage, polarity. -nsure correct welding
technique 3 welding direction, run sequence.. +heck welding time#
time laps and0or run out lengths1. -nsure adequate cleaning between
passes2. +orrect interpass temperatures 3 minimum and0or ma$imum4.
+heck root internally !pipes" where access permits.5. +heck back
gouged welds 3 amount gouged,shaped of gouge, cleanliness of
gouge!where applicable"
%uties after welding
&. -nsure weld is post cleaned.
