1) frp widing technics 2)widely ued in petroleum,chemical and water suppling material and technic: continous fiber class ,resin,fiber class cloth, with skillfull manufacture features: 1)high intensity and long service life 2)corrosion resistant application: petroleum,chemical area,water supplingspecification: DN15-4000 PN:0.6MPa,1.0MPa.1.6MPa,2.0MPa [GRP/FRP fittings FRP elbow]