| 摘要 |
PURPOSE: A manufacturing method of a high-pressure gas for city gas is provided to protect a high-pressure hose from heat and flames by coating the hose with urethane. CONSTITUTION: A manufacturing method of a high-pressure gas for city gas is as follows. A hose is extruded in a pipe shape through an injector of an extruder, and an inner rubber layer(1) is formed. A wire reinforcing layer(2) is formed by braiding steel wires having a diameter of 0.25-0.30mm around the outer surface of the inner rubber layer. The outer surface of the wire reinforcing layer is coated with one of Chloropolyethylene, Chloroprene, Styrene-Butadiene Rubber, and Ethylene Propylene Diene Monomer. An outer rubber layer(3) is formed on the coated wire reinforcing layer.
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