الحالات الهندسية
أنابيب خرسانية أسطوانية مسبقة الإجهاد من كلوريد البولي فينيل مبطنة
وصف الحالة
PVC lined prestressed steel cylinder concrete pipe is a technical improvement product of reinforced concrete pipe (PCCP) for jacking construction method. Its inner wall PVC anti-corrosion sheet is made of polyvinyl chloride as the main raw material, and other modified auxiliary materials are extruded at high temperature and high pressure. At present, the PVC anti-corrosion sheet we use is a product imported from Taiwan, which is divided into two types: T-shaped key and diamond-shaped key (as shown below). The T-shaped key structure is suitable for vertical vibration molding process and core mold vibration molding process, and the diamond-shaped key structure is suitable for centrifugal molding process and core mold vibration molding process. It is mainly used to transport seawater, urban sewage, industrial wastewater, strong acid and alkali and other strong corrosive media.


PVC anticorrosive sheet is generally coiled material with a thickness of not less than 1.5mm. It is produced and tested in Taiwan according to the requirements of CNS13781 and K3112 of the standard "PVC anticorrosive lining sheet" and DBJ15-53-2007 tested in China according to the Guangdong standard "Technical Specification for Concrete and Reinforced Concrete Lining Modified PVC Drainage Pipeline Engineering.
PVC lined prestressed steel cylinder concrete pipe follows the traditional concrete pipe on the basis of economic and practical, easy installation, good stiffness, but also has a good anti-corrosion effect and small flow resistance and other characteristics.
Physical function of modified PVC anticorrosive sheet
| Physical Test Items | Test Method | Standard value |
| Tensile strength (longitudinal and transverse bond directions) | A.S.T.M.D.412 | 17.25MPa(minimum) |
| Elongation (measured at fracture) | A.S.T.M.D.412 | 225%(minimum) |
| Water-soluble substance content (24h) | A.S.T.M.D.570 | 0.05%(minimum) |
| Water absorption (75mm × 25mm, 24h) | A.S.T.M.D.570 | 0.10%(minimum) |
| Tearing force (longitudinal and transverse direction) | A.S.T.M.D.1004 | 80N/mm(minimum) |
| Hardness (Shore) | A.S.T.M.D.2240 | 54°~62° |
Chemical function of modified PVC anticorrosive sheet
| Various concentrations of chemical liquid | Test Method | Weight change rate maximum |
| 20% sulfuric acid | A.S.T.M.D.543 (7d,20 ℃) |
0.12% |
| 5% sodium hydroxide | 0.20% | |
| 5% ammonia water | 0.40% | |
| 1% nitric acid | 0.20% | |
| 1% ferric chloride | 0.60% | |
| 5% ferric chloride | 0.15% | |
| 1% sodium hypochlorite | 0.20% | |
| 2% soap and detergent | 0.40% |
جراب كلاسيكي
مشروع PCCP للمياه المتداولة لمياه البحر لمشروع التكرير والكيماويات في هينجلي (داليان)
مشروع دعم إمدادات المياه في منطقة استقبال المياه عبر الطريق الأوسط من الجنوب إلى الشمال
مشروع تحويل من نهر يانغتسه إلى نهر هوايهه
مشروع إمدادات المياه شرق مدينة Zhengkai