Heat shrinkable sleeve to live by two-component solvent-free liquid epoxy primer + radiation cross-linked polyethylene mending tape (sets) + adhesive layer composed of three layers structure, which is called the three PE external corrosion coating. Substrate selection of The Dow Chemical Company (Dow Chemical Co.) quality DFDD 0588 BK LDPE, after radiation engineering performance is better than Japan's Ube UBEC 600V6, is the material of choice for heat shrink products; adhesives used in Japan's Mitsui EVA, dozens of high-temperature chemical materials, additives Russia butyl rubber, natural rubber, rosin resin refining. Heat shrinkable fill the mouth with the late nineties used in the oil and gas industry, long-distance transport of oil, gas pipe weld corrosion, but also widely used in the beginning of this century, long-distance oil and gas pipe weld corrosion, city gas pipeline network seam corrosion , heating pipe seam corrosion, water pipe joints and other areas of corrosion. Executive Standard: SY / T4054-2003 and GB / T23257-2009 Model Specifications: HHWSΦ159 × 500 HHWSΦ219 × 500 HHWSΦ273 × 500 HHWSΦ325 × 500 HHWSΦ426 × 500 HHWSΦ508 × 500 HHWSΦ529 × 500 HHWSΦ610 × 500 HHWSΦ711 × 500 and above. . . . . . Maximum specification model: HHWSΦ1420 × 500 common width (mm): 400 450 500 550 600 650 700, a large quantity can call to order. Thickness (mm): 2.0 2.2 2.3 2.5 and above GB / T23257-2009 standard to live shrinkable sleeve thickness (mm): For diameter base layer ≤400 ≥1.2 ≥1.0> 400 ≥1.5 Executive Standard: SY / T4054 -2003 and GB / T23257-2009