Lean alloy steel is often used in special pressure-bearing equipment. The alloying elements often added include manganese, silicon, chromium, nickel, ...
1.The cold box foundation is divided into frame type and non frame type. The levelness of top surface of frame type frame shall not exceed 1 / 1000. A...
When the air separation unit is in normal operation, the liquid flows down and can only flow on the tray and flow to the lower tray through the overfl...