GEARENCH SCT2036 PETOL SURGRIP Casing Tong - Manual (Page 16)

14
Non-Destructive Evaluation
The figure below indicates the critical areas of the tong handle. A critical area is defined as
an area in which no unrepaired crack indications are permitted and in which no major weld
repairs are permitted. A weld repair shall be considered minor when the depth of the cavity
does not exceed 30% of the actual wall thickness or 1 inch, whichever is smaller, or when the
extent of the cavity does not exceed approximately 10 square inches. Major weld repairs
must be performed by GEARENCH™ or an approved repair center using appropriate
procedures followed by full heat treatment and load testing
. There are no critical areas on the
jaw or hanger that meet these criteria. No weld repairs are permitted on all remaining
components including pins, yoke plates, and inserts.