When installing ductile iron rain gauges, we should pay attention to the installation requirements in accordance with the construction requirements. So that after the installation, the installation of the effect of all aspects, we can have a good grasp. So, when we install, should be based on what kind of method to install it?

First of all, pay attention to the nodular cast iron rain grate embedded depth of not less than 40mm, covers should be raised height should not be less than 3mm.

Second, the installation of the covers and bearing the surface of the production of smooth, smooth, no cracks and the impact of the performance of the bar to check the use of cold, loose and other defects, not welding.

Third, the contact surface of the grate and the support surface of the bearing for machining, to ensure smooth contact between the covers and bearings.

Fourth, the assembly structure of the grate and bearing size should meet the requirements of GB6414, the tolerance level should not be less than GB6414-86CT10 requirements, and to ensure that the manhole and bearing interchangeability.

Fifth, the carrying capacity of the grate is not less than 360KN, allowing the residual deformation of 1/300 * D, rain carrying capacity of not less than 140KN.

Sixth, between the grate and the bearing should be used galvanized chain connection or other forms of locking device. The grate and the wellbore can be connected through the pin (or other form), the grate of the flip angle of not less than 120 ° grate and well ring anti-corrosion practices: asphalt varnish again.

The above six aspects of the request is that we install the ductile iron rain grate, it should be noted that we before the construction, we must clear these aspects.