DHF Bi-met DML(Bimetal steel pipe)

DHF Bi-met™ DML is a bimetallic tube, where a highly wear and corrosion resistant self-fluxing alloy or hard particle diffusion composite coated lining with Self fluxing (SF) alloy matrix is formed on the inner surface of a steel tube by means of the high frequency induction heating (IH) process.


  • Highly reliable quality: diffusion bonding between the base material (steel tube) and coated lining eliminates peeling and corrosion.
    (IH process results in high consistency, reproducibility and powerful diffusion bond with lining interface)
  • High adaptability to respond to customer needs
    1. ① Optimum lining design: capable of optimally designing (with maximum cost performance) the coated lining required (material, thickness) depending on service conditions, installation location, target service life, and other factors.
    2. ② Our core technology—the IH bending process—can be applied, enabling the products to serve in various transfer system units.
  • 断面写真
    Cross-sectional photo
    Photo showing fusing and bending process

    “One stop” service DHF can do it all: procure base pipe/substrate, pipe bending, application of inner lining, flange welding, painting.

Product specifications

Lining material
SW1600: Ni-base SF alloy
SHW350: Ni-base SF alloy cermet
Lining thickness
Max. 2.0 mm (standard 1.5 mm)
Steel tube (base material) size
40A - 300A (sch 40 ~ sch 160)
Steel tube (base material) thickness
5.5 mm - 25 mm
Max. 3000 mm
Bending radius
4.5DR or over
  • Specifications may vary depending on such relevant conditions such the tube thickness.
  • Please contact us regarding any dimensions or specifications not provided above.

Application cases: pneumatic piping systems where particle wear occurs, especially in bent sections.

  • Piping in pneumatic piping systems in waste incineration plants or woody biomass power plants for transferring fly ash.
  • Pulverized coal injection piping, resin pellet transfer piping systems
  • Other piping systems used for conveying various materials.


For any inquiries about the services we provide, please contact us at the phone numbers listed below.

Tokyo Sales Office
Kansai Sales Office
Kyushu Sales Office
Inquiries or consultation about the services offered