JOESCO turnover box (also called JOESCO Bastion) has the ability of resisting explosion shock wave, can limit explosive damage within a certain range of the wall.With reinforced concrete blast walls, steel blast walls, steel explosion protection walls and brick wall.Reinforced concrete blast walls of steel staggered strong tie, the wall thickness is usually 30 to 40 cm;Thicken wall base buried depth should be greater than 1 m.Blast walls should be able to withstand the shock pressure of 3 mpa.In a device with explosion danger and no explosion dangerous unit, and in a greater risk of equipment should be set up around the blast walls or other facilities.