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Position: Home > Products > Product Details > PE mining pipe industry standard requirements

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PE mining pipe industry standard requirements

● Appearance: The inner and outer walls of PE mining pipes should be smooth and flat. No bubbles, cracks, obvious grooves, depressions, etc. are allowed. The ends of each pipe shall be perpendicular to the axis.

● Wall thickness deviation: The wall thickness deviation of the same cross section of PE mining pipe does not exceed 14%.

● Wall thickness: The minimum wall thickness of PE mining pipes corresponding to the nominal outside diameter and nominal pressure should meet the standard requirements.

● Out-of-roundness: Out-of-roundness of PE mining pipes should not be greater than 5%.

● Flat: PE mining pipes are pressed to the full weight of the inner wall, and there should be no cracks or damage.

保压 100h, PE矿用管材应无渗漏和破坏。 ● Hydraulic: At the test pressure holding pressure of 100h, PE mining pipes shall be free of leakage and damage.

● Tensile strength and elongation at break: The elongation at break should not be less than 9.0Mpa, and the elongation at break should not be less than 300%.

● Surface resistance: According to the application of PE mining pipe, its surface resistance requirements are different.

①Pipe for water supply and drainage: the arithmetic average value of the surface resistance of the outer wall should not be greater than 1.0 × 109Ω;

② Positive pressure duct: the arithmetic mean value of the surface resistance of the inner and outer walls should not be greater than 1.0 × 108Ω;

③The tube for shotcrete: the arithmetic average value of the surface resistance of the inner and outer walls should not be greater than 1.0 × 108Ω;

④Negative pressure air duct: the arithmetic average value of the surface resistance of the inner and outer walls should not be greater than 1.0 × 106Ω;

⑤ Gas drainage pipe: The arithmetic average value of the surface resistance of the inner and outer walls should not be greater than 1.0 × 106Ω.

应大于或等于煤矿用 PE管各项技术标准。 ● Coal mine flanges should be greater than or equal to various technical standards for coal mine PE pipes .

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