Article 9 of the Regulations on the Safety Supervision of Special Equipment (Order No. 549 of the State Council) (2) Pressure vessels refer to confined equipment containing gas or liquid and carrying a certain pressure, the scope of which is defined as the maximum working pressure greater than or equal to 0.1 MPa. (gauge pressure), and the product of pressure and volume is greater than or equal to 2.5 MPa • L of gas, liquefied gas and liquids with a maximum working temperature higher than or equal to the standard boiling point of the fixed container and mobile container; the nominal working pressure is greater than or A gas cylinder equal to 0.2 MPa (gauge pressure) and a product of pressure and volume greater than or equal to 1.0 MPa•L, a liquefied gas, and a cylinder having a normal boiling point equal to or lower than 60 ° C; an oxygen chamber. As long as the above requirements are met, it is a pressure vessel. Generally, liquid ammonia cylinders are pressure vessels. Unless the volume of liquid ammonia cylinders is too small, the product of pressure and volume is less than 1.0 MPa•L. Liquid ammonia cylinders should meet the requirements of the “Safety Supervision Regulations for Gas cylinders”.

specification:

400 liters (200 kg): 600 mm in diameter and 1780 mm in total length;

800 liters (filling 400 kg): inner diameter 800mm, total length 2000mm