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  • SMC Manhole Cover Advantages
    • May , 22 2017
    SMC Manhole Cover Advantages

    SMC is the short form of Sheet Moulding Compound. It is composed of resin, fiberglass and other chemical polymer. This a raw material for mold pressing. The core is chopped strand and unsaturated polyester resins paste that are covered by LDPE&HDPE sheet , with a thickness of 3mm-6mm,600mm-1200mm width and is packed in rolls or boxes. During production,to cut ,weigh the raw material and then p...

  • Why composite manhole cover will instead of iron manhole cover ?
    • May , 27 2017
    Why composite manhole cover will instead of iron manhole cover ?

    From Production : Iron manhole cover has ductile iron and casting iron , they has making a strict environmental pollution during the coal burning process . More and more governments will take policy to limits it developed . But composite manhole cover used science production , and no pollution . From Cost : With the limits and high import tax on iron products , the cost and price of iron manhole c...

  • SMC ( Sheet Molding Compound ) Production Process
    • Jun , 02 2017
    SMC ( Sheet Molding Compound ) Production Process

    SMC is the short form of Sheet Moulding Compound. It is composed of resin , fiberglass and other chemical polymer. This a raw material for mold pressing . Paste reservoir dispenses a measured amount of specified resin paste onto a plastic carrier film. This carrier film passes underneath a chopper which cuts the fibers onto the surface. Once these have drifted through the depth of resin paste, ano...

  • The History of Composite Material Developments
    • Jun , 07 2017
    The History of Composite Material Developments

    Using composite substances is not new. The early Egyptians and Mesopotamians discovered that mixing straw and mud together gave them an excellent composite building material to build strong, long lasting buildings, and straw was the main substance employed to provide reinforcement and strength in ancient products including boats and pottery. Natural resins obtained from plants and animals were the...

  • The Reasons to Choose Composite SMC Manhole Cover
    • Jun , 16 2017
    The Reasons to Choose Composite SMC Manhole Cover

    can weigh up to 85% less than their metal counterparts. This makes them easier to transport and to move into place, reducing the equipment and manpower needed. It also greatly decreases the risk of worker injury, reducing compensation, lost working time and distress. Theft is a huge problem with traditional cast iron covers because of their high scrap value, however composite manhole covers contai...

  • The Urban Drainage System
    • Jun , 20 2017
    The Urban Drainage System

    1.Gully refers to the facilities that the pipeline drainage system to gather surface water , the structure that collect the storm water in the storm water pipe or combined sewer ,the basic components of the rainwater system are composed of water inlet, well bore and branch pipe. Roads, squares, and even the roof’s rain water of the building first through the grate into the gully , then through the...

  • Installation of manhole covers and frames
    • Jun , 23 2017
    Installation of manhole covers and frames

    INSTACorrect use of the product in the shaft: If the shaft is round, use a round frame. If the shaft is square, use a square frame. Under no circumstances should traffic be allowed to pass unless the installation of the product is finished. 1、Preparation of the seat Prepare a seatClean up to the solid concrete on the base, avoiding gravel falling into the well. may not be used as the seating for t...

  • The Testing Methods for Manhole Cover Loading Capacity
    • Apr , 24 2018
    The Testing Methods for Manhole Cover Loading Capacity

    manhole coversFirst is testing permanent sets less than remands . D400 composite manhole cover1,The permanent set of the cover was < 2.0mm which is within the permissible stated in Table 8 of the standard. (1/300 x 600 = 2.00mm). The cover therefore passed the EN124 D400 test for both permanent set and load.

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