Specialized Knowledge Points for Fire Protection Plastic-Coated Steel Pipes: Testing Standards and Installation Considerations-Shandong Fuchengtai Metal Products Co. Ltd

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Specialized Knowledge Points for Fire Protection Plastic-Coated Steel Pipes: Testing Standards and Installation Considerations

Fire-fighting coated plastic steel pipe is one of our company’s core export products, widely used in various building fire protection systems worldwide. Its quality is directly related to fire safety, and it must strictly comply with relevant testing standards and installation specifications. Combined with the table below, we elaborate on the key testing items, standard requirements and installation key points of fire-fighting coated plastic steel pipes to help customers achieve standardized application.

Category	Core Content	Standard Requirements / Operation Specifications
Core Testing Items	Coating Thickness Test	EP (Epoxy Resin) spraying thickness: 100μm–400μm; PE (Modified Polyethylene) coating thickness: 400μm–1000μm. Tested by an electromagnetic thickness gauge, with 4 measuring points per cross-section all meeting standards.
Core Testing Items	Pinhole Test	The length of pipe test piece is about 1000mm. Test voltage: 1500V for coating ≤ 0.4mm, 2000V for coating ＞ 0.4mm. No electric spark generation is deemed qualified.
Core Testing Items	Bending / Flattening Test	Bending test for DN≤50mm: bending radius is 8 times the nominal diameter, no coating damage within 30° bending. Flattening test for DN＞50mm: flattened to 4/5 of the outer diameter with intact coating.
Core Testing Items	Temperature Resistance Test	Constant temperature treatment at high temperature ℃ for 1 hour and low temperature ℃ for 1 hour. After cooling, the coating shall have no peeling or cracking with qualified adhesion.
Installation Notes	Construction Operation	Cut with metal saws and groove with dedicated grooving machines; welding is prohibited. Bending angle shall not exceed 10°, and the curvature radius shall not be less than 8 times the pipe diameter. Seal pipe openings timely after installation to prevent foreign matter entry.
Installation Notes	Environmental Requirements	Avoid embedding in reinforced concrete structural layers and keep away from high-temperature and strong corrosive environments. Dropping, throwing and severe impact are forbidden during transportation and handling to prevent coating damage.

All our fire-fighting coated plastic steel pipes have passed professional fire protection certification issued by the National Chemical Building Materials Testing Center. Complete test reports can be provided to meet the acceptance standards of overseas fire protection projects, and professional technical guidance is available throughout the whole process.

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