Compare manhole cover with cast iron and gray cast iron manhole cover

The manhole cover is made of different materials. In particular, cast iron manhole covers are very popular because of its outstanding advantages. Cast iron has many types, in which cast iron and gray are most selected for manhole cover - http://www.google.co.uk/search?hl=en&gl=us&tbm=nws&q=manhole%20cover&gs_l=news . So what are the differences between these two types of caps?<br> <br> The difference between 2 types of manhole covers in gray and gray cast iron:<br> <br> 1. Conceptually<br> <br> The manhole cover with cast iron bridge is in spherical form thanks to the transformation by elements such as Mg, Ce and rare earth, bringing high durability. This is the type of cover used at post offices.<br> <br> With the gray manhole cover with a gray surface (characteristic of ferrite and graphite), with slow heat dissipation during casting, this type of lid is cast from sand, graphite dissolved in liquid iron with the amount of time allow. This type of lid is often used in roads and mua diều hòa cũ an phúc - http://chuyendieuhoa.com/mua-dieu-hoa-cu-209.html industrial zones.<br> <br> 2. Characteristics<br> <br> Spherical iron has a higher degree of permeability than gray because of the amount of graphit1 in cast iron. Therefore, the type of cap made from cast iron will have durability, tensile strength, gravity resistance, bending, ... superior and of course the cost will also be higher. Spherical cast iron manhole covers are less cracked or broken than gray cast iron.<br> <br> 3. Application of 2 types of covers<br> <br> In the two types of covers, the lid of the manhole cover with gray cast iron is more commonly used in the construction of street and urban areas.<br> <br> On the outside, these two types of covers are very similar but their characteristics and features - https://www.gov.uk/search?q=features are very different. If you are in need of owning manhole covers, please contact us for best advice. Our company provides all kinds of cast iron lid, gray cast iron of international quality such as: No rust or wear and is produced under advanced technology and techniques to meet your needs.<br> <br> With many years of operation, we are constantly providing the manhole cover products with cast iron with round, square, negative, positive, etc. Depending on the needs and orders, we will set Design and manufacture the most quality assurance. Always honored to serve you with the best price