On 31.08.2015 NB Key Diffusion carried out type approval of a range of cryogenic tanks for transportation of liquefied refrigerated gases, UN 1977, UN 1951, UN 1073 - Nitrogen, Argon, and Oxygen, respectively, with capacity from 25 m3to 30.4 m3. Supervision of manufacture and initial inspection of a tank with capacity of 30.4 m3 were performed in ÇORUM, Turkey. The tank is designed to carry liquefied Nitrogen and is intended for sale to Yolbulan Celik Sanayi ve tic. ltd. sti., Turkey.