Houston, TX – March 5, 2012 - MRC Global Inc. (“MRC”), formerly McJunkin Red Man Holding Corporation, today announced it has completed the previously announced acquisition of the operations and assets of OneSteel Piping Systems (OPS). Effective today, OPS now operates as MRC Piping Systems Australia.

Andrew Lane, Chairman, President and Chief Executive Officer commented, “We are pleased and excited to have completed the acquisition of OneSteel Piping Systems. With the acquisition of OPS, MRC is now the largest distributor of pipes, valves and fittings in Australia in the markets we serve, with the largest full-line product offering including carbon steel, stainless steel and alloy pipe, valves, fittings and flanges to serve customers throughout Australia in the oil and gas, mining and mineral processing industries.”

About MRC

MRC Global Inc. – Global Supplier of Choice® Headquartered in Houston, Texas, MRC is the largest global distributor of pipe, valve, and fittings (PVF) and related products and services to the energy industry, based on sales, and supplies these products and services across each of the upstream, midstream and downstream sectors. More information about MRC can be found on our website at www.mrcpvf.com.