In general: cold water pipes (white) are used for domestic water supply, condensed water, oxygen, compressed air, and other chemical liquids; hot water pipes (orange) are used for heating piping systems and ground radiant heating piping systems; gas pipes (yellow) For natural gas, liquefied petroleum gas, gas pipelines.
The connection of the aluminum-plastic composite pipe is ferrule-type, so the first step in the construction is to pass a strict pressure test to check whether the connection is firm. The second is to prevent frequent vibrations and loosen the ferrule. The third is that there should be enough installation in the length direction to avoid pulling off.
The applicable temperature of the cold water pipe is -40-60°C, and the applicable pressure is 1Mpa; the applicable temperature of the hot water pipe is -40-95°C, and the applicable pressure is 1Mpa; Equivalent to 10kg of water pressure.
To identify the pipe material, the high-quality aluminum-plastic pipe has a 5-layer wrapping structure, and there is a layer of hot melt between the polyethylene and the aluminum pipe, and the two layers cannot be peeled off; the inferior aluminum-plastic pipe has a three-layer structure, and there is no hot melt between the aluminum and the polyethylene Glue, easy to peel off by hand.
From the perspective of processing technology, high-quality aluminum-plastic pipes are finely processed, and the text outside the pipe is printed by inkjet, which is similar to the writing on the bottom of the can; the price of inferior aluminum-plastic pipes is often very cheap, because it uses ordinary non-high-density plastics. Vinyl material, the text outside the tube is printed with an ordinary printing machine, and the handwriting is blurred.
