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Why Vacuum Loss Happens — And How Pipe Quality Fixes It Stage III vapor recovery systems at retail fuel stations rely on a carefully balanced vacuum loop to capture gasoline vapors during refueling and return them to the underground storage tank. When the system cannot maintain target vacuum levels, vapor emissions rise and the station

5 Common Mistakes When Installing Underground Composite Pipes at Fuel Stations Installing underground composite pipelines at fuel stations is a task that demands precision. Even experienced crews can overlook details that lead to leaks, pressure drops, or premature pipe failure. At Luoyang Wohong Petrochemical (brand: Ai Yuan), we have supplied HDPE-based composite pipes for hundreds

Pressure Testing Procedures for Ai Yuan HDPE Composite Underground Piping Systems at Fuel Stations Pressure testing is one of the most critical quality assurance steps when installing underground composite piping at fuel stations. For Ai Yuan (HDPE + EVOH + conductive masterbatch composite) systems, proper pressure testing confirms that every electrofusion joint, adapter connection, and

Why Regular Inspection of Underground Composite Piping Matters Underground composite piping systems at fuel stations operate under constant stress—soil pressure, fuel chemical exposure, temperature fluctuations, and ground movement. For operators using Ai Yuan HDPE + EVOH composite pipes from Luoyang WoHong Petrochemical, a structured inspection and maintenance schedule is essential to prevent leaks, avoid costly