... 5.Best quality&service Supplier evaluation strength (BV authentication)fiber glass pipe features:- this pipeline not open ditch, ... not require large equipment- FRP tube corrosion resistant performance, long life, almost no warranty, no maintenance, to ensure ... surface blanket, short cut carpet, quartz sand, etcMolding process: fiber winding processSpecifications: DN 400mm ~ DN3600mmPressure level: 0.25, ...