O.C.S. S.p.A. designs and manufactures Heavy-Duty Equipment for Oil & Gas sector – Pressure Vessels, Reactors, Columns, Tower ... s, Shell & Tube Heat Exchangers, WHB, PGB, Desalters, Deaerators, Oil Recovery Technologies and PSA. Our fabrication experience covers vessels in carbon steel, low alloy steel, nickel alloys, stainless steel, cladded materials and aluminum. read more