China TIANJIN CNPETRO HITECH CO.,LTD Company Cases

With the rapid growth of the petroleum industry and the continuous increase in energy demand, the reserves of crude oil and refined oil have received widespread attention, and the requirements for the reserve capacity of various oil depots are also increasing. The number of various types of storage tanks has increased sharply. Due to various reasons, tank accidents are frequent and economic losses are enormous. The main causes of tank accidents are corrosion and leakage, and external corrosion is mainly caused by the corrosion of the outer wall of the tank bottom plate and humid atmospheric corrosion; Internal corrosion mainly refers to the corrosion of the tank bottom, tank wall, and tank top. Among the above corrosion states, the most difficult to treat is the corrosion of the tank bottom plate. The connection between the outer edge plate of the tank bottom and the foundation is complex and irregularly shaped, and the technical problem of anti-corrosion, waterproof, and sealing at this location has always been a challenge for the industry. One reason is that the connection between the base of the tank and the bottom plate of the tank body causes radial expansion and contraction of the bottom plate due to temperature changes in the environment; The second reason is that the deformation of the oil tank is caused by the load change of the oil transportation and storage capacity. When the oil tank is subjected to liquid, a large circumferential stress is generated due to the static hydraulic pressure, causing horizontal displacement of the oil tank along the radius direction. The edge plate cannot expand outward due to being firmly welded to the bottom plate, resulting in deformation at the edge plate and generating edge stress. This stress, together with the resistance of the base to the edge plate, causes plastic deformation of the outer ring of the bottom plate; When the oil tank is empty, the tank body returns to its original state, but the edge plate curls upwards due to plastic deformation, In this way, the conventional sealing waterproof material in this area is also prone to sealing failure. Previously, commonly used anti-corrosion methods were CTPU, fiberglass, asphalt mortar, waterproof membranes, and other materials. After two to three years of operation, the anti-corrosion layer will fail, causing rainwater to enter the foundation of the bottom plate and accelerate the corrosion of the tank bottom. The local corrosion rate can even reach 0.3-0.4 mm/year, causing local perforation and leakage accidents, seriously threatening production safety. The flexible mineral grease system of CNPETRO is suitable for the special characteristics of edge plates and is a new and excellent waterproof and anti-corrosion sealing system.     Composition of PTU waterproof and anti-corrosion system PTU 101 modified anti-corrosion primer PTU 102 high-temperature mineral grease anti-corrosion paste PTU 103 high-temperature mineral grease anti-corrosion putty (anti-corrosion adhesive) PTU 104 high-temperature mineral grease anti-corrosion tape PTU 105 UV resistant linear aluminum foil adhesive sealing tape PTU 106 can be coated with paint     USAGE: This system is applied to the anti-corrosion and waterproof sealing protection of metal edge plates and concrete structures of various types of tank bodies, such as newly built and repaired oil tanks, fire water tanks, petrochemical raw material tanks, and chemical raw materials.       Clean the surface of the cement thoroughly, without impurities or soil. Clean the metal surface thoroughly, remove the floating embroidery, and ensure that the original adhesion is tight The dense paint does not need to be removed. The surface treatment standard refers to the St2 level.     Apply a layer of anti-corrosion primer evenly on the cement surface and edge plate surface to form the first waterproof layer.    

Construction Procedures This product must be used properly in accordance with relevant company’s construction procedures or under the supervision of engineer(s) on site. We are not responsible for any consequences caused by any product misuse or non-compliance with the procedures. Anti-corrosion Layer Classification An especially enhanced anti-corrosion layer structure should be adopted for AC Flexible Grease Fiber Sealing Oily Tape System. Anti-corrosion layer classification Applications Complete anti-corrosion layer structure recommended Especially enhanced level Metal annular plate of storage or oil tank base Tank vertical face: AC Flexible Visco-elastic Tape Primer + AC Flexible Anti-UV Visco-elastic Tape (single layer) Tank metal flat surface: AC Flexible Anti-UV Visco-elastic Tape (single layer) + AC Flexible Grease Sealing Paste + AC Flexible Grease Fiber Filler + AC Flexible Grease Fiber Oily Tape (double layers) Concrete platform of storage or oil tank base Asphalt Base Oil + AC Flexible Grease Sealing Paste + AC Flexible Grease Fiber Filler + AC Flexible Grease Fiber Oily Tape (double layers)   Transportation and Storage Handling: During product transportation, avoid any damage to packing boxes or throwing behaviors, and stack the product in an orderly manner. Storage: The product should be stored in a cool and dry place, protected from rain and direct sunlight, and away from fire and heat sources. Storage temperature is recommended to be in the range from -20°C to -35°C. The product will not expire as long as it is stored under proper conditions.

CNPetro-Mastic (Grey Heavy Duty)   Filler or sealer on irregular or uneven surfaces     CNPetro - Mastic is a grey cold applied self-supporting mastic. It is a petrolatum compound containing inert fillers and short fibers.     It is used for sealing, filling ,moulding and caulking applications. It can be used to contour tank bases and profile irregular surfaces. It is applied prior to the tape application and generally used in conjunction with primer, Petrolatum Tapes or CNPetro Bituminous Tapes.     Excellent sealing properties No VOCs Not effected by water, acids and salts Easy application, No special tools Stable and reliable. Minimal surface preparation (SSPC SP 2 - 3).     Prepare surfaces by removing all loose scale, rust or other foreign matter in accordance to SSPC SP2 or SP3 , After Applying a thin coat of primer to the surface. Then, by hand application, mold the mastic to a rounded confi- guration to fill irregular shapes or holes and reduce sharp edged surfaces .      

  PileCoat system provides corrosion protection for steel,concrete,timer structures in the splash and tide zones. The Products are most widely used for marine pipelines, risers and pilings’ anti-corrosion protection projects. The system protect the substrate against water,oxygen,salts, acids,caustics,and mechanical damage. The system accommodates piles with cylindrical sections,it is comprised of an interior anticorrosive barrier of marine grade petrolatum paste and tape,and outer protective cover provided by a HDPE jacket. The tough HDPE outer jacket is secured with SS316 stainless bolts through a simple hydraulic system. The jackets also have excellent long term UV stability. The system has service lives of over 30 years.       List of Products CNPetro-Paste （Marine Petrolatum Paste Surface treatment Primer） CNPetro-Tape （Marine PetrolatumTape） HDPE Jackets & Stainless Steel SS316 bolts (PileCoat 2000F Jacket) Uses: PileCoat Splash and tide zone anti-corrosion protection System provides protection for steel, concrete and timber structures in the splash and intertidal zones. This Heavy Duty system protect the substrate against oxygen and water, preventing corrosion and deterioration. The system can withstand the most aggressive environments.       Product Advantages Fast and easy installation Cost efficient No V.O.C. environmentally responsible 30 year plus service life Very simple equipment necessary Minimal surface preparation Proven in worldwide sea conditions. Safe to apply UV resistant.