Classification of PE mining pipe fittings
① Polyethylene water supply and drainage pipes (KS) for underground coal mines
② Polyethylene shotcrete pipe for coal mine (KJ)
③ Polyethylene positive pressure ventilation pipe (KFZ) and negative pressure ventilation pipe (KFF) for underground coal mines
④ Polyethylene gas drainage pipe for underground coal mine (KW)
⑤ Polyethylene universal pipe (KM) for underground coal mines: suitable for gas drainage, water supply and drainage, positive pressure ventilation, negative pressure ventilation, and shotcrete
管材 应用范围 : 广泛用于煤矿井下供排水管、矿用正压通风管、矿用负压通风管、矿用喷浆管、矿用抽放瓦斯管 。 PE mining pipe applications : It is widely used in coal mine underground water supply and drainage pipes, mine positive pressure ventilation pipes, mine negative pressure ventilation pipes, mine shotcrete pipes, and mine drainage gas pipes . Can be used in corrosive and humid environments. Working temperature ≤40 ℃, working pressure range: 1.0MPa ～ 1.6Mpa.
管材 内外壁应光滑、平整，不允许有气泡、裂口和明显的沟纹、凹陷等，颜色黑色，且色泽均匀。 The inner and outer walls of PE mining pipes should be smooth and flat. Bubbles, cracks and obvious grooves and depressions are not allowed. The color is black and uniform. PE矿用 管材 两端面应切割平整并与轴线垂直。 The perpendicularity of the end face of PE mining pipe shall be cut flat and perpendicular to the axis. 管材 壁厚偏差管材同一截面的壁厚偏差不应超过 14%。 Wall thickness deviation of PE mining pipe The wall thickness deviation of the same section of the pipe should not exceed 14%. The minimum wall thickness of the pipe whose wall thickness corresponds to the nominal outside diameter and nominal pressure shall meet the requirements of Tables 1 to 2 of Q / HTK01-2011. The out-of-roundness of the out-of-roundness pipe should not be greater than 5%. PE矿用 管材 被压至内壁重合，应无裂纹和破坏。 The flat PE mining pipe is pressed to coincide with the inner wall, and there should be no cracks and damage. The hydrostatic strength of pressure-resistant pipes shall meet the requirements of Table 3 of Q / CD03-2011. Tensile strength The tensile strength should not be less than 9.0Mpa, and the elongation at break should not be less than 300%. Drop weight impact pipe shall comply with the requirements of 5.7 of MT558.1-2005. After the drop weight impact, at least 9 out of 10 samples shall be free of cracks and damage. 管材 表面电阻内、外壁表面电阻算术平均值应符合 MT558.1-2005中4.9规定要求 The arithmetic average value of the surface resistance of PE mining pipe inner and outer wall surface resistance shall meet the requirements of 4.9 in MT558.1-2005