The expansion coefficient of PP-R plastic-aluminum stable pipes is 0.03, close to that of metal pipes, the expansion coefficient of ordinary PP-R pipe is 0.15.
（2） There is no deformation in outside installation. The experiment has shown that the deformation is very small when the PP-R plastic-aluminum stable pipes pass the hot water over 95℃. The size is stable. Compared with the ordinary PP-R, it can use less supports, can be used outside in the construction, and has a beautiful appearance.

（3） More obvious property of temperature-resistance and compression-resistance: Kingbull PP-R plastic-aluminum stable pipe has a good property of creep resistance. The addition of an aluminum layer has made the plastic-aluminum stable pipe integrated with the advantages of plastic pipe and metal pipe, improved the safety (the safety factor of PPR is 1.0, the safety factor of PPR stable pipe is 1.25) and life, and had a higher compression strength.
（4） Anti-UV, impervious of oxygen: it can be used in the transportation field and effectively restrain the growing the microbes such as algae;
photo of corrosive radiator and pipe of electric heater.

（5） Reliable connection and high level of safety: the hot melt method is the same as PP-R, the aluminum level is totally isolated from hot water, with a fast joint, high degree of safety, convenient operation, and no seepage, which can guarantee a use of more than 50 years.
Why Kingbull Can Do It
1. Kingbull is the chief editor of Chinese industry standard and regulations with many licensed technologies. It has edited the industry standard “PP-R Plastic-Aluminum Stable Composite Pipe” (CJ/T210-2005), and “Technology Regulations on Pipe Engineering of PP-R plastic-aluminum Composite Pipe for Air-conditioning” (CECS198: 2006) . It has four patents.
2. Produce products strictly according to the industrial standard the adhesion performance and cladding performance of aluminum is the best in China. Kingbull PP-R stable pipe is tight in the joint of aluminum tape without quality flaw such as holes and needle eyes.
3. After the adoption of special production techniques in the process of inner pipe production, PP-R has a high degree of crystallinity and a small spherulite, and has solved the problem of stress concentration, has guaranteed not only the excellent mechanical property and long term creep resistance property but also made the impact strength and cold shortness reach the leading level of China.
4. It has various products of different specifications with the largest scale in China. Among the products from Dn20 to Dn110, all the products whose specification is above S4 can be produced and they can meet the clients’ demand in many aspects. Kingbull has 200 production lines and it has a market share of No. 1 in China.
5. It normatively and effectively operate the international ISO quality Control System with a reliable control of quality