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This report presents the results of spherical vessel investigation and laboratory research of physico-mechanical properties of steel and welded joints. Dynamics of corrosion-mechanical cracking of the vessel welded joints and brittle fracture resistance at low temperatures and dynamic forces have been given in the context of fracture mechanics. The major causes of corrosion-mechanical cracking of the vessel welded joints in the medium of liquid ammonia have been determined. The performance of works on stress deconcentration in the butt-welded joints on the inside of the wall being in contact with ammonia was demonstrated to be an effective method of increasing resistance to corrosion-mechanical cracking and brittle fracture.

Rise in brittle fracture resistance of spherical vessels for storage of liquid ammonia under extreme forces