It has been carried out a test programme to qualify welded super 13%Cr service applications. The test programme included weldability trials, weld testing and
corrosion testing of 13%Cr steels from five different steel mills stainless steels for sour simulations, mechanical. Two of the tested steels have been qualified for use as flowline materials in some parts of new sour service fields. The result shows excellent weldability properties and acceptable corrosion properties. Post weld heat treatment (PWHT) of the welds improved the resistance towards sulphide stress corrosion cracking significantly.