ABSTRACT
A new gas field development with a challenging environment i.e. high pressure, high temperature and high H2S. The corrosion rate prediction performed, the expected metal loss is more than 8 mm thickness reduction within the 25 years design life. PETRONAS has embarked its tailor made qualification tests for qualifying CRA (Alloy 825) Mechanical Lined pipe to its project development. This is the pioneer project for PETRONAS to accommodate high pressure and high temperature service applications with high H2S environment. The tests were carried out to assess the susceptibility of liner material Alloy 825 to wrinkle under carbon steel pipeline coating condition, installation strain and operation strain, as well as to study the fatigue cracking behavioral at the seal weld locations due to operational cycles.