Zone ⅲ, being a stable zone, will have a stable state of bottom plates and a constant volume increment, and it is required to carry out a strapping table correction for real tank volume to replace the invalidated strapping table for empty tank. 第Ⅲ区为稳定区,罐底板总体处于稳定状态,增量保持恒定,空罐容积表不再适用,必须进行实罐容积表修正。