1. Aluminum plastic composite pipe for gas. The gas pipe material of the special aluminum-plastic pipe is the gas pipe material of the aluminum-plastic composite pipe, with the welded aluminum pipe as the intermediate layer, the inner and outer layers are polyethylene plastic, the inner and outer layers of the aluminum layer are bonded by hot melt adhesive, and the gas pipe material is compounded by special mechanical processing method.
2. PVC gas hose is generally divided into three layers. The inner layer is PVC black rubber inner pipe, the middle is steel wire explosion-proof net, and the outer layer is PVC protective layer. The explosion-proof net plays the role of hooping the PVC inner pipe, and the protective layer plays the role of flame retardant and preventing rat bites and scratches. The price of PVC gas hose is relatively cheap, generally a few yuan to 10 yuan per meter. It is suitable for families where the liquefied gas is connected to the liquefied gas tank and needs regular ventilation. It is also convenient to replace.
3. 40 chromium seamless steel pipe. Compared with solid steel such as round steel, the 40 chromium seamless steel pipe is lighter in weight when the bending and torsion strength are the same. The 40 chromium seamless steel pipe is a kind of steel with economic cross-section and is used as a pipeline for conveying fluids, such as oil, gas, gas, water and some solid pipelines.
4. The material of stainless steel corrugated hose is 304 stainless steel, and the principle of making it is to use 304 stainless steel pipe to make it into a spiral shape through hydraulic process and cover it with PVC protective layer. Stainless steel corrugated hose has the advantages of anti-aging, high temperature resistance, anti rat bite, anti falling, corrosion resistance and long service life. However, the price is more expensive than that of PVC gas pipes. When using stainless steel hoses, attention should be paid not to disturb them back and forth, which may cause metal fatigue or air leakage of threaded joints. On the other hand, the stainless steel corrugated hose should not be too long. If it exceeds 1.5m, it needs to be fixed; When mechanical damage is caused by external force, it must be replaced.