API “routine” tests are those that are always required as
a minimum for acceptance. “Special” tests described by
API are agreed on by the manufacturer and purchaser.
The routine tests listed in Table 1 are very basic insulation tests
with which all manufacturers have experience. The special tests in Table 2 require additional time and equipment and may also need specialized expertise to interpret
the results. Together, the test series forms the
basis for a thorough evaluation of insulation system manufacturing quality.