certification:ISO9001/ISO14001 Size:1216/1620/2025/2632mm laser welding pipe for hot water Specifications:1. Five layers: Polyethylene, Adhesive, ... Aluminium, Adhesive, Polyethylene2. Connection mode: Overlap welding; Butt welding3. Size: 1216, 1620,2025,2632,3240,4150,50634 ...