Striking a Balance in CRA Pipe Protection

摘要

The use of corrosion resistant alloys (CRA) is increasing in the pipeline industry. Although, CRA clad and lined pipes are less expensive than solid CRA pipes, their main advantage consists of a balance between good mechanical properties of the carbon steel carrier pipe and the corrosion resistance of the internal CRA layer. Clad pipes consist of an internal CRA layer, which is metallurgically bonded to the backing carbon steel. Different manufacturing processes, such as hot-rolling or weld overlay, are used to bond the CRA layer to the carbon steel. In contrast to clad pipes, lined pipes have a CRA lining that is mechanically bonded to the carrier pipe.