Shipment of Corrugated Metal Ducts for Post Tensioning

shipment of corrugated metal ducts
shipment of corrugated metal ducts

New galvanized corrugated metal ducts are ready for delivery.

Prestressed metal ducts are an important part of prestressed concrete structure, which has the characteristics of high strength, high rigidity, and strong corrosion resistance. It is mainly machined with corrugated ducts, and the wavy ports are interlocked with each other and made round by round.

The material of the prestressed metal ducts is the steel belt with a thickness of 0.25mm~0.35mm. Generally, most of the steel belts used on construction sites are about 0.3mm, and the error is less than 0.03mm. Most of the specifications of the ducts are calculated according to the inner diameter, and the specifications of the inner diameter are 40mm-130mm (multiples of ten).

Product performance

  1. Rigidity test: radial deformation ≤ 0.1d when resisting concentrated load 0.75KN or uniform load 1.5KN.
  2. Impermeability test: Water or cement slurry with a water-cement ratio of 0.5 will not leak or leak for 30 minutes.
  3. Tensile test: No damage to the pipe wall with an axial tensile force of 5KN.
  4. Pull-out test: The pull-out force embedded in concrete is more than 2.3 times the design pull-out force of the anchor bolts.
  5. Bending test: When the bending degree is 30d of the radius of curvature, there is no water leakage or slurry leakage.

Standard: JG225-2007 Corrugated metal ducts for prestressed concrete