Rida T.S. had just finished on-site project for SOC, the scope of the activity was: participating (dismantling the valve, splitting their bodies, removing o rings, replace the body/flange gasket and assemble the valves parts back together againand erecting them back to line) accompanied by PROVALVE Engineer to carry out a maintenance work “site and workshop” for 15 DBBV duple block bleed valves, the valves are owned by SOC “Sirte Oil company” and they are located at BREGA terminal.