News - Vohon Petrochemical

Electrofusion Welding Techniques for HDPE EVOH Composite Pipes in Stage III Vapor Recovery Underground Networks

Electrofusion Welding Techniques for Underground Composite Pipes in Stage III Vapor Recovery Systems Electrofusion welding is the most reliable jointing method for HDPE-based composite pipes used in Stage III vapor recovery underground networks. Unlike mechanical couplings or butt fusion, electrofusion uses factory-embedded heating coils within the fitting to melt and fuse the pipe surface and […]

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Underground Composite Pipe Wall Structure and Material Selection for Fuel Station Systems

Pipe Wall Structure and Material Composition Underground composite pipes used in fuel station systems are constructed with multiple layers, each serving a distinct purpose. A typical HDPE/EVOH composite pipe from manufacturers like Luoyang Wohong Petrochemical consists of: Inner HDPE layer — provides primary fuel containment and resists chemical attack from gasoline, diesel, ethanol blends, and

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HDPE EVOH Composite Pipe Performance in Stage III Vapor Recovery Underground Networks

Why Flexible Composite Pipes Matter in Stage III Vapor Recovery Underground Networks Stage III vapor recovery systems at gas stations rely on a closed-loop underground network to capture fuel vapors during refueling and return them to the storage tank. The piping material chosen for this underground vapor return line directly affects system tightness, long-term reliability,

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Global Market Trends for Underground Composite Pipes in Fuel Station Construction (2026–2027)

Global Market Trends for Underground Composite Pipes in Fuel Station Construction (2026–2027) Underground composite pipes are becoming the preferred choice for fuel station piping systems worldwide, replacing traditional steel and single-wall fiberglass in new construction and retrofit projects. This article provides procurement managers and station developers with a data-driven overview of market trends, regulatory shifts,

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Multi-Layer Co-Extruded Composite Pipe Technology: How HDPE, EVOH, Conductive Masterbatch, and Adhesive Resin Work Together in Underground Fuel Systems

Title: Multi-Layer Co-Extruded Composite Pipe Technology: How HDPE, EVOH, Conductive Masterbatch, and Adhesive Resin Work Together in Underground Fuel Systems Post content: Modern underground fuel piping systems at service stations face a demanding set of requirements: they must contain fuel reliably, prevent product permeation into surrounding soil, dissipate static electricity, and withstand mechanical loads from

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