Testing scope: Plastic pipes, PE pipes, PVC pipes, PPR pipes, plastic steel pipes, stainless steel pipes, corrugated pipes, HDPE pipes, aluminum plastic composite pressure pipes, steel strip reinforced corrugated pipes, polyethylene (PE) double wall corrugated pipes, rigid polyvinyl chloride (PVC-U) structural wall pipes for building drainage, galvanized steel pipes, steel wire mesh skeleton plastic composite pipes, acrylonitrile butadiene styrene (ABS) pressure pipes Polypropylene pipe fittings (PP-R) for cold and hot water, plastic lined composite steel pipes for water supply, PE-RT pipes, PB pipes, etc. Testing items: residual stress detection, ring stiffness, ring flexibility, bending strength, compressive strength, appearance, structural dimensions, radial tensile test of pipe ring, airtightness, ventilation test, cross-linking degree measurement, hydrostatic test, longitudinal shrinkage rate, melt mass flow rate, minimum average peeling force of pipe ring, Vicat softening temperature, drop hammer impact test, opacity, oxidation induction time, simple beam impact test, melting temperature, ash content, Thickness of inner coating, flattening performance, oven test, compressive cracking stability, hygiene performance, (pipe cross-section). Bending test, circular bending test, expansion test, bending edge test, etc