Internally and Externally Epoxy-Coated Composite Pipes vs. Steel-Plastic Composite Pipes: Performance Comparison and Selection Guide-Shandong Fuchengtai Metal Products Co. Ltd

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Internally and Externally Epoxy-Coated Composite Pipes vs. Steel-Plastic Composite Pipes: Performance Comparison and Selection Guide

Internal and External Epoxy Coated Composite Pipes and Steel-Plastic Composite Pipes are two flagship pipeline products of our company. Both belong to the steel-plastic composite product series, yet they differ greatly in coating materials, performance characteristics and applicable scenarios. The detailed comparison below helps domestic and overseas customers select products accurately according to actual demands and improve overall project cost performance.

Comparison Item	Internal and External Epoxy Coated Composite Pipe	Steel-Plastic Composite Pipe
Coating Material	Inner and outer walls adopt epoxy resin (EP), food-grade standard, odorless and pollution-free.	Inner wall lined with PE/PP plastic; outer wall maintains original steel pipe color (additional anti-corrosion treatment is optional).
Corrosion Resistance	Excellent resistance to acid, alkali, salt spray and organic solvents; ideal for strongly corrosive media.	Good anti-corrosion performance for neutral and weakly corrosive media; extra treatment required for severe corrosive conditions.
Sanitary Performance	Compliant with GB 5749-2022 drinking water hygiene standard, applicable for food and drinking water transportation.	Meets basic sanitary standards, but not suitable for long-term transportation of highly corrosive food and drinking water.
High Temperature Resistance	Working temperature range: -30℃ to 120℃, suitable for high-temperature fluid delivery.	Working temperature range: -20℃ to 80℃; prone to aging and deformation under high temperature.
Applicable Scenarios	Drinking water supply, chemical media transportation, high-temperature fluid, fire protection systems, medical industries.	Civil water supply and drainage, general industrial conveying, building heating, agricultural irrigation.
Cost Performance	Slightly higher unit price, outstanding anti-corrosion and high-temperature resistance, low long-term operation cost.	Economical unit price, cost-effective for conventional working conditions.

Shandong Baoju provides one-on-one product selection suggestions based on customers’ medium type, operating temperature, engineering budget and other requirements. Customized production is available to meet personalized demands of various overseas engineering projects.

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