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  • Produce a wide range of large diameter spiral S.A.W. pipe products from 400mm to 2,600mm in capacity 200,000m.tons per year with coating and lining


  • Coated and wrapped steel pipes for water service
  • Steel pipe pile for foundation
  • Steel pipe sheet pile with clutch set
  • Coal-tar enamel and epoxy coating
  • Liquid epoxy and modified epoxy coating
  • Fusion boned epoxy coating
  • Polyethylene coating
  • Polyurethane coating and other special coatings for marine service


  • High strength and durability allow steel pipe to be used in high-pressure applications.

  • Inside and outside coating make the life of pipe semi-permanent.

  • Dong Yang's pipe maintains its shape, without bending or breaking, when submitted to forces caused by setting of the base soil even when the pipeline is buried.

  • Steel pipe's extreme strength eliminates the need for supports at welded joints when pipe is buried.

  • Extreme ease of welding and cutting allow minor repairs to be executed without interrupting water flow.

  • Dong Yang's large diameter, extended length and special pipes can readily be produced.

  • Dong Yang's light-weight pipe is easily transported and installed even in
    underground applications.


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Hydro-tested length : 12m, Max: 15m
Non-hydrostatically tested length: up to maximum shipping



Plain end, Square cut, Beveled end, Flanged, Flexible coupling, Bell & Spigots



AWWA C 200
ASTM A 134, A 139, A 252
JIS G 3457, A 5525, A 5530
BS 3601, 3602
DIN 1628



  • Double length pipes speed up pipeline construction and reduce costs to the consumer.

  • Dong Yang's pipe "Specials" can be easily produced to suit for local conditions at the construction site.

  • Repairs of pipeline are quickly accomplished by welding.

  • Our light-weight steel pipes are easier to deliver and handle than other products.
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