API Corrosion and Materials API-571 Exam Practice Test

Stainless steels with sigma can normally withstand normal operating stresses but upon cooling to temperatures below _______ may show a complete lack of fracture toughness as measured by a Charpy impact test.

Cl SCC usually occurs at metal temperatures above ________.

Typical HF Alkylation units operate with 1% to 3% water in the acid, equivalent to an HF-in-water concentration of 97% to 99% and the temperatures are generally below _________.

Temperature, ________ and stress are critical factors of stress rupture. This is usually found in furnaces with coking tendencies and fired heater tubes.

The severity of hydrochloric acid corrosion ________ with _________ HCl concentration and increasing temperatures.

________ and _______ damage develop without applied or residual stress so that PWHT will not prevent them from occurring.

A carbon steel bundle from the overhead condenser in the crude unit operates at 300 F and is in hydrochloric acid service. It showed severe pitting type corrosion when pulled for inspection. What type of material would be best suited for this service?