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Ensure smooth construction and long-term safe use of polyethylene (PE) water supply pipe system, the user accepts the pipe, fittings acceptance is particularly important, now accept the material when the key inspection items are summarized as follows, please refer to:
1. Factory certificate/test report: detailed name of the manufacturer, the implementation of standards and related testing indicators.
2. The use of polyethylene raw material level (PE80 or PE100) and grade: in the pipe logo information should be material information and naming.
3. Appearance: Visual inspection, the internal and external surfaces of the pipe should be clean, smooth, and not allow bubbles, obvious scratches, dents, impurities, uneven color and other defects. Both ends of the pipe should be cut flat and perpendicular to the axis of the pipe.
4. Length: generally measured using a steel tape measure, room temperature ~ conditions shall not have a negative deviation.
5. Color: the pipe should be black or blue, black pipe should be extruded on a total of at least three blue bars, the color bar should be uniformly distributed along the circumference of the pipe direction, blue pipe is only used for dark laying.
6. Out of roundness: the general use of vernier calipers to measure, coils or nominal outside diameter greater than 710mm straight pipe, out of roundness of the maximum value agreed by the supply and demand sides, the rest of the specifications of the maximum out of roundness shall not exceed the standard requirements.
7. Outside diameter and wall thickness: Outside diameter is generally measured using an outside diameter π ruler, the average outside diameter at the pipe port should not be less than 98.5% of the measured value at 1.5dn or 300mm from the pipe port; the thickness is generally measured using a micrometer for wall thickness, and the thickness should not have a negative deviation.
8. Production date: There should be detailed production date on the pipe marking information.
