News - Vohon Petrochemical

Electrofusion Joint Inspection and Testing for Underground Composite Fuel Pipe

Field quality control of electrofusion joints is the single most important factor that determines how long an underground composite fuel pipe system lasts. For Ai Yuan double-wall (HDPE + EVOH + conductive masterbatch) and single-wall composite pipes used at fuel stations, a bad fusion joint can become the first leak point before the pipe wall […]

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Designing Underground Vapor Recovery with Double-Wall Composite Pipe

Underground double-wall composite piping is the backbone of a modern Stage II and Stage III vapor recovery system at gasoline dispensing facilities. This article covers how to select, install, and maintain double-wall composite pipes for vapor recovery lines, with a focus on HDPE/EVOH-coextruded fuel pipe for underground service. Why Vapor Recovery Lines Need Double-Wall Composite

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Underground Composite Pipe Selection Guide for Fuel Stations

Choosing Underground Composite Piping for Fuel Stations: A Buyer’s Engineering Checklist For procurement engineers and contractors specifying fuel station underground pipe systems, the choice between single-layer and double-layer composite pipe affects not only initial cost but long-term integrity, leak detection capability, and installation speed. This article walks through the key engineering considerations when selecting underground

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Stage III Vapor Recovery with Underground Composite Fuel Pipes: Design and Installation Guide

How Stage III Vapor Recovery Works with Underground Composite Fuel Pipes Stage III vapor recovery systems are designed to capture fuel vapors that escape from vehicle fuel tanks during refueling, and route them back into the underground storage system. The efficiency of the entire system depends on one often-overlooked component: the underground pipe network. This

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Selecting STP Double-Layer Composite Pipe for Underground Fuel Systems

Selecting STP Double-Layer Composite Pipe for Underground Fuel Systems: A Practical Engineer’s Guide Choosing the right underground piping for a service station fuel system is not a matter of picking the cheapest option. The line between a tank and a dispenser has to handle constant pressure, thermal movement, aggressive fuel blends, and years of buried

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