Welding Inspection & Metallurgy API ICP Self Study Notes

11.2.4 Inspection
Inspection tasks typically associated with hot tapping or welding on in-service
equipment should include:
a. Verifying adequate wall thickness along the lengths of the proposed welds
typically using UT or RT.
b. Verifying the welding procedure. Often, plants have welding procedures
qualified specifically for hot taps and in-service welding.
c. Verifying flow conditions.
d. Specifying the sequence of welding full encirclement sleeves and fittings
(circumferential and longitudinal welds).
e. Verifying fit-up of the hot tap fitting.
f. Auditing welding to assure the welding procedure is being followed.
g. Perform NDE of completed welds. Typically this includes VT, UT shear
wave using special procedures for the joint configuration, MT or PT as
applicable for material and temperature.
h. Witness leak testing of fitting, if specified.