Paul Cook, of Painters USA, examines best practices for facility and terminal managers
Surveys and testing are vital for delivering safety, savings and long-lasting surface coatings, regardless of where a tank is located. Here’s an example: A facility manager invited a certified NACE Institute inspector and instructor into his facility to quote a project for sandblasting and coating a tank. As the inspector examined the tank, which contained sulfuric acid, he noticed a few, almost imperceptible, spots flaking off. The tank’s top
revealed slight areas where the steel had swelled (Figure 1). The inspector immediately asked if anyone had inspected the tank via ultrasonic testing (UT) to detect and pinpoint discontinuities and get a measurement of the tank’s wall thickness.
It is critical to use UT to check steel welds and metal thickness – a contractor can only blast so much. The inspector next asked if the facility manager had conducted testing for salt (e.g. chloride, sulphate, n...