VRV has several designs for high pressure shell and tube heat exchangers, utilized in the hydrotreating process. The most widely required heat exchangers are TEMA type, DEU modified (bolted-in construction), however VRV is also highly qualified to supply other types of heat exchangers with special closures for high pressure applications (packed metallic / fiber, trapezoidal metal / fiber and delta metal closures).

The most frequently used materials are various grades of low-alloy steels, high nickel alloys, Incoloy 825, Inconel 625. Materials can be offered in solid, cladded or overlaid construction, carried out in single-layer or double-layer by ESW or SAW processes. Tube to tubesheet joint is performed with orbital-automatic welding with or without filler metal in one or two layers. NDE techniques are TOFD, CB-Scan, Phased Array in accordance with ASME C.C. 2235 instead of RT for heavy wall components. One of the largest heat exchangers built by VRV weighed 160 tons with an outside diameter of 3,600 mm and an approximate number of 5,000 tubes.