First, Cailv finished gutters technical standards 1, Material: color aluminum (aluminum-manganese alloy) BAN drowning exterior color See material model 2, according to the rainfall reached 40-60 mm / hr for heavy rain vertical riser. displacement of 0.1 cubic meters / sec, with a comprehensive K Gutter seven inches 60X80 rectangular square tube riser, within 10 meters parallel effective displacement and specifically through an angle of each of the displacement amount ,, no more than 130 square meters of roof, gutter than 4 bend point no more than 70 square feet, this project a standpipe, the largest catchment area of ??120 square feet, the smallest catchment area of ??58 square feet. Therefore the choice of filling K7 gutter with 60X80 square tube can meet function. 3, the proposed legislation 1mm wall thickness of the seamless tube use, can effectively prevent the wall of water seepage, water pipes and other touch flat to happen now. (1mm wall thickness of the pipe in the following construction and later in life and is easy to touch owners flat, after damage replace cumbersome and difficult secondary colors can be replaced with the same). 4, item 3-4 floor general in height, air waste and leaves difficult to drift into the clogged drain to the days of the trench. Therefore proposed to abandon the use of network file leaves. 51), permit color: same color can not supply more than △ E = 1.0; color under different supplier can not exceed △ E = 2.0. Coating thickness 30um 2), the coloring process: The international advanced six-step electrostatic spraying, degreasing - chromium - anticorrosion primer - paint - varnish - cured, double anti-corrosion paint, 10-year warranty. 3), the surface quality of the decorative surface: Do not allow air bubbles, scratches, holidays, color, prints and other defects, do not allow visual inspection is not obvious from the surface of 1.5m slight defect in natural light conditions. 4), flatness: gutter side flatness of not more than (3mm / m). Vertical downspout is not greater than (2mm / m). 6,300 hours artificial climate aging resistance test 300 hours Resistance to artificial aging test equivalent to five years under natural conditions, the aging time. Ruichen Building Material Co., Ltd. The introduction of foreign advanced equipment gutter, the water processing system, provide various types of sizes. Our company can customize a variety of colors to meet the different needs of customers. The company is a production of the first large-scale enterprises, the sales volume 500,000 m. providing a metal water system and PVC water system, square rainwater pipes, special size, can be customized processing!