On April 25, the price of steel-plastic composite pipe increased slightly in Guangzhou. Q215 (ASTM A283 Gr.C) Ronggang DN40 (1.5"*3.25mm) plastic-lined 1016.42, up 1.38; Q235 (ASTM A36 Gr.D) Ronggang DN125 (5"*4.0mm) plastic-coated 1067.50, up 1.38. (USD/ton)