Anti seepage engineering of oil storage tank of CNPC and Sin
Storage tank is used to store liquid or gas. Storage tank engineering is an essential and important infrastructure in petroleum, chemical, grain and oil, food, fire protection, transportation, metallurgy, national defense and other industries, and its basic requirements are also quite strict. The foundation soil layer should meet the design value requirements of bearing capacity, and anti-seepage and moisture-proof treatment should be done, otherwise the leakage will cause serious pollution to the environment, and the underground water vapor will corrode the steel tank. Therefore, HDPE anti-seepage membrane is the best anti-seepage and moisture-proof material in the tank foundation design.
Impervious material
Polyethylene film series products: HDPE anti-seepage membrane, LDPE flexible waterproof membrane, high-density polyethylene geomembrane are used in tank foundation and tank farm anti-seepage projects.
Anti seepage construction
Laying 1 http://www.xytugongmo.comHDPE Before the anti-seepage membrane, the backfill of the base course is leveled and rolled, and the compactness reaches 93%. No sharp debris, such as debris, gravel, concrete particles, reinforcement head, metal or other debris, which can pierce the anti-seepage membrane, shall be allowed within 25 mm of the vertical depth of the laying surface.
2. HDPE anti-seepage membrane is flexible material, which can be shaped according to the ring beam of tank body and any structure of tank farm. All corners and right angle parts shall be rounded or chamfered to avoid damaging HDPE anti-seepage membrane during sand backfilling.
3. After laying, welding shall be carried out immediately. Hot air blower and extrusion welding machine can be used to weld pipe joints, internal and external corners and corners.
4. Blank holder anchorage: according to the design requirements, generally, the reverse side is 30cm ~ 50cm on the ring beam, and the expansion bolt and strip are used to anchor the blank holder. After edge pressing, other sealing and anti-corrosion measures shall be taken.
