Due to the compressed air pipe internal may produce pollution, so in the air into the powder coating system best filter processing after before.

由于在压缩空气管道内部可能产生污染，所以在空气进入粉末涂装系统之前最好经过过滤处理。

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Pipe shall not be allowed to flash rust before coating.

管道不允许再喷涂前闪锈。

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Surface cleaning is critically important for pipe coating, and shot (impeller) blasting is the most suitable derusting method for most kinds of coating materials.

钢管的表面处理是决定覆盖层质量的关键因素，对大多数覆盖层而言，喷(抛)丸除锈法是最理想的除锈方式。

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With 10 million yuan in capital, much of it provided by his parents, Zhang set up his own pipe coating business in 2002.

FORBES: Add Oil! Chinese Drill-Pipe Maker Ventures Into The Middle East

It was through his involvement in setting up the first drill pipe coating production line sourced from the U.S. that a business opportunity began to emerge.

FORBES: Add Oil! Chinese Drill-Pipe Maker Ventures Into The Middle East