28 / 03 / 2017

Sustaining safe welding operations

Borja Saíz Sánchez (Newtesol, Spain) and Jürgen Krüger (Polysoude, France) explain how weld overlay cladding of components can help to guarantee zero defect manufacturing of pipes. Modern oil and gas pipelines are especially assembled for the oil and gas market manufactured line pipe and further components like flanges, fittings, branch pieces (Tees) etc. To absorb the induced mechanical stresses, most of these parts consist of high strength low alloy steel (HSLA). If increased corrosion resistance is required, the interior can be reinforced by a CRA coating. CRA stands for Corrosion Resistant Alloy, this group of materials consists of austenitic and martensitic stainless steels as well as nickel-base and titanium-base alloys.