1.Covers all liquid nitrogen vessels of double walled multilayer, vacuum insulated con-struction and of capacities 2 to 50 litres. These vessels are also termed vacuum vessels.
1.1 This standard is divided into two sections. Section 1 covers liquid nitrogen vessels for storage and transportation purposes and Section 2 covers automatic dispenser units for the safe and economical transfer of liquid nitrogen under self pressure or external pressure conditions.
IS 11552-1986 history
1986IS 11552-1986 Specification for liquid nitrogen vessels with a capacity of up to 50 liters