... the technique of thermosol binding, they are convenient to be installed and reliable in joints. Also, the materials can be recycled. ... reaching more than 160mms in caliber. Mingda PP-R tubular products and pipe fittings are widely used in such areas as delivery ... fluids, heating pipes, circulation system of hot water, pipes in agriculture, planting in gardens and parks and ranches, etc. Size:20,25,32