Does the STI SP001 standard include inspection of fiberglass and other plastic tanks?
Overall, the standard focuses primarily on inspection of welded, metal, shop-fabricated and field-erected tanks. Also included is the inspection of smaller, portable containers such as 55-gallon drums, intermediate bulk containers (IBCs) and other such containers that may be of metal or plastic construction. Inspection of non-portable, shop-fabricated plastic or fiberglass tanks is not included. See the definitions within the standard for more specific questions related to size and material of construction. Question: The pre-2005 edition of STI SP001 gave specific instructions on the number of UT readings to be taken on every tank. This ensured that each inspector did inspections exactly alike. Does the latest edition of the standard allow a tester to take one reading on the shell of the tank and claim he tested the tank for an area where corrosion was most apt to occur? Answer: The previous STI SP001 standard did not use a risk-based approach, but made the UT testing a requirement on
