The pex-al-pex pipe(multilayer pipe, PAP pipe) we can supply include: 1) Aluminum layer is longitudinally welded(by ultra-sonic wave method) in an over lapping way. 2) Aluminum layer is BUTT-WELDED by argon arc welding method. 3) Aluminum layer is BUTT-WELDED by LASER welding method.Packaging: Carton