... "5. Type:Slip-on flanges,Blind flanges, Spectacle flanges, Plate flanges,TG flanges, Lap joint flanges,Welding neck flanges,Socket ... : petroleum,chemical,power,gas,water,linepipe, heat exchanger,shipbuilding,construction,etc.17. Tolerance:not less than +_8% of normal wall thickness.18. Our ... :our company try to enlarge market field not only in domestic but also overseas .what's more,we have ...