Steel fixings Be convenience for cutting and construction. Special-purpose fitting connection may be used instead of threading. The PE(X)-Al-PE(X) composite structure acquires pipe a much better burning resistance than that of all polyethylene pipe. Pipe of small diameter is supplied in roll. the length of pipe may be determined at will, and pipe may be bended at will.Thus bend and pipe fitting are unnecessary, which is convenience for construction. Therefore, labor cost can be reduced and time limit for the project would be shortened.