... mechanical physical properties.2.Anti-corrosion,anti-aging.3.inner surface smooth,superior hydraulic perfomance.4.lihgt weight,transportation, ... ,from a high resin content of corrosion-resistance inner layer,transition layer,filament winding strengthening layer and ... strength,inpenmeable,heat insulation,insulation,drug-free and smooth surface characteristics,can be widely used in petrochemical,textile ...