Pump testing and inspection 135
For Casing castings and welds falling under Category A, only visual inspection is
carried out. For Category B components, it is either the dye-penetrant checks or magnetic
particle tests that are carried out.
However, for Category C, it is DP or MPI and followed by UT or RT. Geometric and
other considerations may make one or the other test unfeasible to conduct, however, these
exceptions have to be agreed upon by both the inspector and the pump vendor.
These tests are carried out after a final heat treatment or final machining as may be
the case.
7.1.4 Repairs procedures of castings and welding
When any noticed defect qualifies for major repairs, a written procedure has to be
accepted by the purchaser prio ...