Polyethylene tape / polyethylene gas pipe tape / chemical pipelines polyethylene tape Tel: 18264755877 QQ3139777687 Cui polyethylene anticorrosion tape polyethylene anticorrosion tape substrate made of polyethylene and rubber cover with industrial-type corrosion tape. 2 Composition: polyethylene anticorrosion tape from the base film and the layer of two parts, the base film is a polyethylene membrane, layer of butyl rubber, has good mechanical strength and adhesive sealing performance. Can be divided according to their role in preservation zone (in-band), protective tape (takeaway), mending tape. According to the coating grade requirements are divided into general level, to strengthen the level and especially to strengthen the level. Construction Level 3: Level total coating thickness (mm) ordinary level ≥0.70 coating structure within a layer with a layer of primer + + layer packed to strengthen the level ≥1.40 inner layer with a layer of primer + (lap for 50 to 55% of the tape width) + layer of packed (50 to 55% of the lap belt width) is mainly used in petroleum, natural gas transmission; chemicals, urban construction, water supply and drainage and gas transportation and other buried steel pipeline The outer surface corrosion, easy construction, no pollution. Polyethylene anticorrosion tape from the 1960s to the oil and gas steel pipes are widely used as an external coating material has been 40 years of history, because of the construction of its excellent corrosion resistance performance and convenience, making it occupies in the pipeline coating material system certain status. And because polyethylene anticorrosion tape production enterprises continuously improve and enhance the variety and quality polyethylene tape, so that applications polyethylene anticorrosion tape expanding. 4 Construction Technology: steel surface treatment - brushing primer - Pretreatment Regulations 1. Clear tape wrapped steel slag surface, burrs, grease and dirt and other attachments. For coating overhauling the pipeline, you should use appropriate methods to remove the existing coating and residue. 2. The use of mechanical or sand blasting method projectile (if specified sandblasted), its quality should meet the national standard, "the steel surface before painting Rust grades and preparation grades" GB / T8923-1998 stipulated St3 grade level or Sa2 . (see Appendix grading standards) 3. Rust on steel surfaces exposed defects should be treated, attached to the surface of dust, abrasive should be cleaned steel surfaces should be kept dry. When returning rust or surface contamination, surface preparation must be repeated. Primer: a steel surface pretreatment primer prior to brushing time interval should be controlled within 6 hours, the steel surface must be dry and clean. 2 primer should stir in the container. When the primer mix thick, should be added to the primer matching thinner, to be constructed at a suitable viscosity diluted Road. You can use a clean paint brush, roller or spray some other mechanical means. 3 brushing the primer should be seamless steel pipe coating, no bubbles, clots and sagging and other defects, should form a uniform film. The thickness should be greater than or equal to 30 micrometers. Weld carefully painted to leak painted. Table 4 until the primer dry (at room temperature and air flow conditions naturally, it normally takes 5-10 minutes), then tapes. Should pay particular attention to the temperature is low or when the trench construction, longer dry time to ensure that the lower half of the table dry pipe. 5 steel surface after brushing primer to tapes of the interval should be controlled within 8 hours, the primer surface should be dry, clean (sand large or air humidity should immediately tapes). If more than 8 hours or overnight, should be re-painted primer before wrapping tape. 6 primer, should pay attention to safety, to prevent splashing, and should stay away from the fire source. After the primer used should be the remaining iron primer back into the original container and sealed containers to prevent evaporation waste primer. Under normal circumstances 7: Hand brushing: 10-12 square pipe area / liter mechanical spray primer: 18-20 square meter pipeline area / liter of primer tape wrapped around a tape unwound when the temperature must be above 5 ℃ , coating construction should be carried out in more than -5 ℃. (Experience has shown that tapes can be constructed at a lower temperature at -30 ℃, but to ensure that the temperature of the solution volume.) When the ambient temperature is below 10 ℃, in order to ensure immediate tape has good bond strength, should be adopted blowtorch heat pipe tape glue and baking levels. 2 For the weld, if necessary, to use the reinforcing tape strip width of 30-50 mm, the first covering the weld, and smooth or wood hand tool compaction. 3 Use the appropriate mechanical or hand tools, a good primer coating on the pipe by bonding requirements spiral wound tape, the tape should maintain a certain tension force, making the tape layer of tight junctions. When wrapping tape tape seams should be parallel, not twisted folds. There must be more than 100 mm overlap phase at both ends of the tape. When necessary, the end of the previous period, the base film tape brushing primer or fully baked, to be dry at the starting end of the lap of another section of the tape. The whole story should end the use of wood smooth tool tightly pressed against it does not tilt. 4 Use of effective measures to ensure that machinery is wrapped tape quality, hand-wrapped tape is difficult to achieve uniform surface quality and consistent tension force, only in exceptional circumstances, the mechanical construction can not be carried out, the manual is available tapes, but Use narrow width tape. 5 factory pre-wrapped with time, can be cold or hot wrapped wrapped construction, pipe can be rotated (manually rotate or electric rotary), can also be wrapped around the rotating equipment, welding pipe ends should be set aside reserve section 150-200 mm. 6 prefabricated pipe corrosion quality inspection should be carried out in accordance with the requirements of this standard 8, after inspection, to provide users with factory certification. 7 Use foil tape for aerial crossing pipeline or riser at home against corrosion, shall comply with the specifications of the relevant construction requirements, but does not require spark detector test. 8 mending, elbow, through the wall of the corrosion tape should make full use of the width of the narrow tape, and construction and testing reference to the relevant provisions of this specification. 9 for the overhaul of the pipeline coating, at the construction site should be used to rotate the winding equipment for construction, and construction and testing reference to the relevant provisions of this specification. 5 types: 1, composite anticorrosion tape (butyl rubber type): There is generally within the first zone (with preservative), packed (guard band) and fill the mouth with a preservative system consisting of a primer. 2, 600 anticorrosive polyethylene tape (modified asphalt type): also known as one of the band, the thicker the layer, the general thickness from 0.8mm-4.0mm thick, is a new breed of anti-corrosion tape. 3, double-sided adhesive type anticorrosive polyethylene tape (adhesive): This tape on both sides and butyl rubber compound, usually only as a preservative band (in-band) to use, relatively wide use in the subcontinent, with little domestic use The main design is seldom that domestic standards are not perfect. Standard 6: The new standard code for: SY / T0414-2007 (steel pipeline polyethylene tape coating technology standards), the most important provisions of the anti-corrosion tape re-corrosion grade: coating thickness, to strengthen the level ≥1.0mm special strengthening class ≥1.4mm tape (600 polyethylene anticorrosion tape, double-sided adhesive type anticorrosive polyethylene tape) primed steel peel strength increases and increases with isolated film tape. Tel: 18264755877 QQ3139777687 Cui