Tests Required for Plastic-lined Composite Pipes

Firstly, dimensional inspection is conducted. Additionally, plastic-lined composite pipes must not exhibit any issues of diameter reduction or pipe shrinking. For visual inspection, the surface should be smooth, with a uniform color, free from cracks, bubbles, and scratches that significantly affect appearance. There should be no exposed iron, and the weld seam surface should be smooth and even. Groove inspection, inkjet code inspection, bond strength inspection, bending performance inspection, flattening performance inspection, cold and hot cycle resistance inspection, and hygienic performance inspection are also required.