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Tests carried out at Tijaria for:

• Dimensional & visual Inspection.
• Tensile Strength at yield & Elongation at break.
• Reversion.
• Environmental Stress Crack Resistance.
• Impact Strength.
• Crush Resistance.
• Oxidation Induction Time (Thermal Analysis).
• Hydraulic Characteristics.
• Internal Coefficient of Friction.
• Density of the inner layer.
• Thickness of the inner layer.
• Sulphated Ash content of the duct.
• Fading of colors of ducts.
• Pulling force on duct joined by coupler.
• M.F.I. of duct.
• Density of duct.
• Wall thickness.
• Opacity.
• Vicat softening temperature.
• Resistance to external blow at 00C temperature.
• Effect on water.