This paper shows how recent advances in plastics technology have led to upvc pipes for road and railway drainage that have improved performance characteristics. The introduction of upvc pipes gave immediate cost savings, primarily because they are easier to install. The latest relevant British standard BS 5481 (1977) is the most recent pipe standard for the guidance of construction in the UK, but the authors argue that it is now out of touch with modern developments and market requirements. In particular, its standard dimension ratio (sdr), which is the ratio of the external diameter of the pipe to its minimum wall thickness, is set at 41. This value is too conservative, as extensive technical analysis by trackdrain Ltd of wigan has shown that 52 is a safe value; the latter part of the paper explains the technical principles which demonstrate the validity of this finding. For equivalent internal diameters and hydraulic capacity, the new type of pipe is less expensive, lighter to handle, and more compact; in practical terms, its performance is the same as that of its predecessor.

  • Corporate Authors:

    Scientific Surveys Limited

    P.O. Box 21
    Beaconsfield, Buckinghamshire,   England 
  • Authors:
    • Fox, R M
  • Publication Date: 1988-11-12


  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00487489
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1989 12:00AM