Stainless steel tank manway cover 1.Material:SS304.SS316L 2.Size: 200mm,400mm,450mm,500mm,600mm 3.Pressure:without pressur Stainless steel tank manway cover1. Manhole cover: sanitary circular manhole cover(without pressure)2. Material: SS304. SS316L3. Specification: 200mm, 400mm, 450mm, 500mm, 600mm4. Pressure: without pressure5. Polish: mirror polish.sub-light.180G.240G.400G.tumble.pickling. ...