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       Product type:Patching piece

　　Implementation standard: SY/T4054-2003

　　Main performance: excellent tensile strength and strong bonding performance, can effectively resist the soil stress, external impact and thermal expansion, prevent the corrosion layer deformation and stripping, greatly prolong the anticorrosion life of the protected body.

　　Use: mainly used in petroleum, chemical, water, gas and other jacket pipe HDPE repair.

　　Scope of application: long distance buried steel pipeline, oil storage tank, old pipeline maintenance, repair and pipeline interface corrosion prevention.

　　Instructions:

　　This product is used to heat and melt the adhesive layer during construction, paste the damaged pipe surface, and form a continuous and close anticorrosive system with the original pipe anticorrosive layer, which can resist soil stress, hydrostatic pressure, cathode stripping, chemical corrosion arrogation and mold erosion and other corrosion behaviors.

　　The product is mainly used in the pipeline knock injury, stick on the surface of the pipeline to seal and anti-corrosion role. It consists of a radiation crosslinked polyethylene substrate with a hot melt adhesive on one side.

　　The repair piece, also known as heat shrinkable belt repair piece or polyethylene radiation cross-linking repair piece, is a kind of radiation cross-linking repair piece specially designed and developed for the repair of polyethylene anticorrosive layer of steel pipe. It is made of radiation crosslinked polyolefin substrate and special sealing hot melt adhesive composite. It is specially used for repairing the damage caused by the polyethylene outer anticorrosive coating of two and three layers of polyethylene anticorrosive coating in the process of transportation, inspection and construction. The patch has the characteristics of abrasion resistance, impact resistance, anti-penetration and other aging resistance, chemical corrosion resistance, strong adhesion, easy to operate, high mechanical strength, strong environmental adaptability, soil stress resistance, hydrostatic pressure resistance, cathodic stripping resistance, chemical corrosion and mold erosion and other corrosion behavior, etc. Provide long-term and effective protection for steel pipe.

　　Note: There are two forms of patch patch and patch patch. The patch is not heat shrinkable, and is used for local spot and line scratches less than 100 mm square. When the jacket damage area is more than 100 mm 2, or the axial and radial damage is serious, the patch shall be used.

　　Advantages:

　　· No special tools are needed together

　　· Excellent wear resistance

　　· Acid, alkali and salt resistant

　　· Resistance to moisture and corrosion

　　Suitable for:

　　1. Repair of bump or bump in transportation and handling;

　　2. Repair the damage and explosion of the heat shrinkable sleeve during use;

　　3. Anticorrosion after investigation of anticorrosion coating effect outside the operation pipeline.

　　according to the size of the anticorrosive layer damaged part of the area, the degree of damage, the condition of the working environment, the corresponding repair method is adopted.

　　damage φ ≥30㎜ can be used hot patch or heat shrinkable.

　　1, in advance of the hot repair piece (heat shrinkable piece) cut to the broken part of the maximum diameter of 100㎜ square.

　　2. Use spade knife, grinder, steel wire brush, emery cloth and other tools to treat the damaged part as round and grind smooth, and clean the construction surface with cotton yarn.

　　3, with a baking gun (gasoline blowtorch) to the damaged part and the edge of the heating, and then with a small fire to heat the damage piece (heat shrinkable piece) inner layer, it will be bent to the central part of the hand press, and then paste, so that the air does not flow into.

　　4, with the baking gun (gasoline blowtorch) even heating, and the drum flattening, to prevent wrinkles.

　　the damage φ ≥30㎜ or heat shrinkable sleeve large explosion, the use of longitudinal package fiber heat shrinkable sleeve or heat shrinkable belt repair.