HDPE Spiral Profile Pipe

HDPE Spiral Profile Pipe

HDPE Spiral profile pipe represents the latest advancements in both material and manufacturing technology. Raw material properties and product technology have been combined to provide a lightweight engineered pipe for various non-pressure applications in municipal, industrial, road construction, rehabilitation and marine pipeline applications.

Advantages:

  • Lightweight
  • Impact Resistance
  • Corrosion & Chemical Resistance
  • Leak Proof
  • Long Service Life
  • Environmentally Friendly

Structural Design

A flexible pipe, like Hebeish’s spiral pipe is by definition, a pipe which will deflect when subjected to external loads ( traffic, ground water changes,frost actions, soil settlement etc.) – as opposed to a rigid pipe, which carries all external loads by itself. The degree of deflection of a flexible pipe will depend on the pipe stiffness, support from the surrounding soil, and external loads.

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Material Properties

Properties Property Test Method Typical Value
Density g/cm3 DIN 53479 0.953+0.960
Melt index 190/5 g/10min1 DIN 53735 0.3-0.7
Yield stress N/mm2 DIN 53455  24
Elongation at yield point % ISO/R 527 15
Elongation at break % 125 mm/min >800
Flexural stress at a given deflection N/mm2 DIN 53452 28
Modulus of elasticity MPa 900
Shore hardness D DIN 53505 60
Notched impact strength DIN 53453 no failure
Coefficient of linear expansion K-1 ASTM 696 1,7.104
Thermal conductivity at 20oC W/(m.k) DIN 52612  0.43

APPLICATIONS

HDPE pipes are used in transporting liquids by natural sloping such as :

  • Gravity Sewer System
  • Industrial System
  • Manholes
  • Septic Tank
  • Silor

Pipes Range

  • The pipe materials have been manufactured and tested in compliance with: DIN 16961 – 16566.
  • Compliance with the Egyptian code of practice for the design and installation of potable and sewage pipes.
  • Pipes length: 12 meters long.
Inner Diameter(mm) Thickness(mm)
400 27
500 27
600 27
800 31
1000 37
1200 37
1500 37
2500 70

Connection

Compliance with the Egyptian code of practice for the design and installation of potable and sewage pipes.
Connection by butt welding through heating both ends of the pipes with hydraulic pressing by using welding machine.

INSTALLATION

The pipe stiffness is chosen in regards with soil type, bedding and backfill material, depth of installation and external live and dead load ( groundwater, traffic etc. ) on the pipeline. Please refer to national codes of practice for installation of plastic wherever applicable.

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PIPE BEDDING

The bedding soil should be free from stone within the breadth of the pipe trench. On the trench bottom, a 10-15 cm thick bedding layer is prepared and well compacted. The bedding shall be at least 20 cm wider than the pipe’s outside diameter. For installations in soft/wet soil, a geotextile is placed under the bedding.

PRIMARY BACKFILL

The primary backfill material should be friction soil or macadam. Backfilling should be made over the whole width of the trench. Compaction of the backfill material should be made in layer of 15-30 cm. The final layer or the primary backfill should extend 30 cm over the pipe crown. Note: No compaction is to be done directly above the pipe until the backfill has reached 30 cm above the pipe crown.

FINAL BACKFILL

The final backfill is done in regard with the original soil and external loads ( traffic ). When deemed necessary, the compaction is carried out in several layers. The final backfill material can be compatible as dug materials. However, the material must be free from stones.

INSTALLATION DEPTH

The recommended installation depth is 0.6m – 6m depending on external loads ( groundwater, traffic etc. ) For pipe sizes above 1200mm, detailed static calculations are normally necessary to determine

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