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Difference between Vitrified Clay & Earthenware pipe

  • 1.  Difference between Vitrified Clay & Earthenware pipe

    Posted 03-12-2012 17:40
    Good afternoon,

    Can anyone advise me what the difference between Vitrified Clay and Earthenware Sewer Pipes is

    Thanks,

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    Sharon McDonald
    Asset Management Coordinator
    South Gippsland Water
    Foster VIC

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    Pathway


  • 2.  RE:Difference between Vitrified Clay & Earthenware pipe

    Posted 11-12-2012 12:33
    Hi Sharon,

    From my understanding I believe that they are essentially the one and same.  Possibly the manufacturers had different names for VC and Earthenware in days gone by. Similarly to how the larger pipeline manufacturers badge PVC and PE products today.

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    Kane Macready
    Director - Water, Wastewater and Reuse
    Engineers Plus
    KAWUNGAN QLD

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    Kane Macready
    Director
    Engineers Plus
    KAWUNGAN QLD

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    Pathway


  • 3.  RE:Difference between Vitrified Clay & Earthenware pipe

    Posted 12-12-2012 12:34

    Vitrified Clay (VC) pipe is glazed earthenware pipe.

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    Frank Scheele
    Civil Design Engineer
    Queensland Urban Utilities
    Brisbane QLD

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  • 4.  RE:Difference between Vitrified Clay & Earthenware pipe

    Posted 13-12-2012 17:18
    Strictly speaking, vitrified clay is heated up so that some of the components of the earthenware melt and form a glassy phase that improves the strength and seals the surface.

    Glazed earthenware is dipped in a glaze and fired so that the surface is sealed, but the heating for glazing is at a lower temperature and is not sufficient to change the strength of teh pipe material.  

    Glazed and vitrified pipes can be difficult to tell apart by casual inspection, and the terms are often used interchangeably.

    Although vitrified clay should be slightly stronger than glazed or plain earthenware, the performance when installed is usually the same. In principle, you'd expect a marginal increse in resistance to bending or point loads from vitrified clay but it's unlikely to be enough to make a useful difference, and the resistance to end loads or compression is essentially the same for all forms of ceramic pipes.   



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    Jonathan Morris
    Senior Asset Management Consultant
    Opus International Consultants
    Wellington

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