Ductile iron covers use can play a good masking effects, so their use is also able to play a very good protective effect on the road, wellhead are equipped with such facilities, it will be able to avoid to appear "black city".
In this way, the design style of ductile iron manhole covers is also many. There are square designs, circular designs, etc., which can be used according to requirements when they are used. Their use is also very large, and the corrosion resistance is equally good.
There are many reasons why ductile iron manhole covers are widely used in trunk roads, first of all because they have more seismic and corrosion resistance。 Water jet corrosion test, ductile iron well cover ninety days of corrosion is only gray cast iron manhole cover 1/40, is the gray spheroidal graphite well cover 1/10。 The service life is 2 times of the composite well cover and the cement well cover, and the globular graphite microstructure is superior to the cast steel in reducing the vibration capability, so the utility model is more favorable for reducing the stress。
The surface of ductile iron covers usually has a unique pattern, the main purpose is to increase the friction force, avoid the rain, snow, ice cover to let people slip。 So now many covers, manufacturers cover, are designed on the surface of a variety of patterns, the purpose is to security, anti-skid, we can also according to customer needs to produce patterns of the type。
The above is the Shandong ductile iron manhole cover to share today, you still satisfied with it, welcome to our website: http://www.kpp647.com/ and pay attention to our products, we will provide you with excellent products, sincerely wish to establish business relationship with you.