From the birth of floor heating until now, there are several types of pipes that have been used as floor heating pipes.

XPAPR: Cross-linked clamp aluminum tube

PE-X: cross-linked polyethylene 1

PAP: aluminum-plastic composite pipe 2

PP-B: Impact-resistant copolymerized polypropylene (Korean used to call it PP-C)

PP-R: random copolymer polypropylene

PB: polybutene (super high temperature resistant pipe)

PE-RT:: high temperature resistant polyethylene

PPR Female Threaded Elbow

Note 1: Cross-linked polyethylene is divided into peroxide cross-linking (PE-Xa), silane cross-linking (PE-Xb), electron beam cross-linking (PE-XC) and azo cross-linking (PE-Xd) according to the production method. ) four. Among them, peroxide crosslinking and silane crosslinking are two commonly used crosslinked polyethylene pipe products in China.

However, peroxide crosslinking is not widely used because of too fast oxygen penetration. Silane crosslinking was banned in Europe in 2004 because of the poisonous crosslinking agent silane. Electron beam crosslinking (PE-XC) is a healthy and environmentally friendly pipe that uses physical methods to change the molecular structure. , azo cross-linking (PE-Xd) is experimental.

Note 2: There are three kinds of aluminum-plastic composite pipes on the market, PE/AL/PE; PE/AL/XPE; XPE/AL/XPE. The first is that the inner and outer layers are polyethylene, the second is that the inner layer is cross-linked polyethylene, the outer layer is polyethylene, and the third is that both inner and outer layers are cross-linked polyethylene, and the middle layer is aluminum. The first type is generally used in cold water piping systems, and the latter two are generally used in hot water pipes, which can be used as floor heating pipes.