How to choose ductile iron cover

At present, the market is full of different kinds of ductile iron covers with different prices. How to choose a well - priced well - covered manhole cover in the face of so many ductile iron cover?

first of all make sure purchase ductile iron lid covers load, if calculated are not allowed to use situation and requirements, can be made by the manufacturer to report the specific plan, the key point is to choose bearing capacity of the cover, if the real bearing capacity of the cover can not meet the use requirements of the road, it is not safe to use on the road. The load capacity should be high, at least the 60KN (36 tons) stipulated in the cast iron well cover standard.

second, the need to inspect the strength of the manufacturers, not only to see how a vendor's office, the publicity of how ring, to be true to the supplier's production site to on-the-spot investigation of the cover, make sure vendor's production capacity, operation time, see if there are any commitments in after sales ability.

Compare prices.botou tianlong casting pay attention to compare price basis must ensure the weight of nodular cast iron cover is met the requirement completely, cannot be the price reduces and the quality also reduces, this is to have risk hidden danger.