What kind of material are the flanges and valves on the GRP pipe?
It's better to use plastic or polyurethane
The flange on the GRP pipe is fiberglass, and the flanges and pipes are one. The valve is welded with carbon steel
Construction: glass fiber reinforced plastic can be threaded joints, easy to install, better quality, PVC generally glue adhesive, due to temperature problems, quality is difficult to ensure;
