Nikkiso Clean Energy & Industrial Gases is a leading provider of cryogenic pumps, heat exchangers, process systems, turboexpanders, services, and solutions for the liquefied natural gas (LNG), liquefied hydrogen (LH2), and industrial gases industries. vertical or horizontal storage vessels, cryogenic and high pressure systems, ASME B31.3 pipe welding, process system installation, and hazardous area (CL 1 Div. 1 & 2 Group B or D) electrical work.