The inspection can be done at 4 to 30 locations per day depending on the accessibility and preparation
of pipeline. The GWT data can be acquired by level I inspector for any kind of inspection situation
by properly following the inspection procedure.
However, the difficulty in guided wave testing arises
from two specific areas which have a multitude of varieties: the pipe itself and the pipe condition(s).
Varieties in pipe include the pipe size, surface corrosion, coating, insulation, geometric features of
weld, pipe support, clamp, branch pipe, elbow, flange, valve, etc. Varieties in pipe condition include
the content of pipe, buried or above ground, recording of geometric features along the length of pipe,
probe installation on pipe, data analysis and reporting, etc. Due to these varieties, a guided wave
Level I inspector needs to be properly trained and/or supported by a Level II or III guided wave inspector
who has experience and solid knowledge in various field testing of the above mentioned areas.