Understanding API ICP653 Reading 7-Worksheet-04 Part1

9.9 Alteration of Existing Shell Penetrations
9.9.1 Altered details must comply with API-650.
9.9.2 New bottom installation (above old bottom) and using the
slotted“ method through the shell may not now meet spacing requirements.
Options for alternate compliance include the following three (3) items:
9.9.2.1 Existing reinforcement plate may be "trimmed" to increase the spacing
between the welds, provided the modification still meets API-650.
9.9.2.2 Remove existing reinforcement and install a new pad.
"Tombstone“ shapes are acceptable. The existing upper half of he
reinforcement plate my be used, with a new lower plate installed. A telltale
hole must be installed in the new plate.
9.9.2.3 The existing penetration (nozzle and pad) may be removed
and the entire assembly relocated to the correct elevation.
Charlie Chong/ Fion Zhang