Understanding API ICP653 Reading 7-Worksheet-04 Part1

12.3 Hydrostatic Testing
12.3.1.1 A full hydrostatic test, held for 24 hours, is required on:
a. A reconstructed tank.
b. Any tank that has had major repairs or alterations (See 3.23.) unless
exempted by 12.3.2 for the applicable combination of materials, design and
construction features.
c. A tank where an engineering evaluation indicates the need for the
hydrostatic test.
12.3.2 Hydrostatic not Required Conditions
12.3.2.1 A full hydrostatic test of the tank is not required for major repairs and
major alterations when:
a. The repair has been reviewed and approved by an engineer, in writing.
b. The tank owner or operator has authorized the exemption in writing.
Charlie Chong/ Fion Zhang