Ductile Iron Gully Cover can be used for main road and city sewage system, according to the application and weighing level, we divide it into multiple levels. Class D400 is the most common one on the main road, 600*600*100mm is the most common one in D400.
600*600mm refers to the size of the clear opening, which is the same as the internal size of the manhole. This size is also very convenient for staff to enter the interior and working.
Ductile iron is a very strong material with very good toughness and tensile strength. It is an excellent material for making manhole covers and can be used for more than 50 years.
If you need to purchase manhole covers for your road construction projects, you can contact us. We specialize in producing ductile iron gully cover. In addition to providing D400 600*600*100mm Square gully cover, we also provide many other specifications.
Welcome to contact us for the latest quotation.