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2024-05-20 13:51:20    评论:0 点击:
The base material of the coated composite steel pipe used in coal mines is 20 # steel seamless steel pipe, which is coated with epoxy resin for corrosion prevention. The thickness of the inner and outer coatings shall not be less than 200 μ m. The color of the inner and outer coating materials shall be agreed upon by both the supply and demand parties. When the pressure of coated composite steel pipes used in coal mines is 4Mpa, the connection method can be fixed flange connection at both ends; The flange material is Q235B or 20 # steel forged flange, with flange thickness, outer diameter

煤矿用涂层复合钢管基管材质为20#钢的无缝钢管,采用环氧树脂涂层防腐,内、外涂层厚度不得低于200μm,内、外涂层材料的颜色由供需双方商定。煤矿用涂层复合钢管压力为4Mpa时,连接方式可选择两端固定法兰连接;法兰材质为Q235B或20#钢锻造法兰,法兰厚度、外径、螺栓孔中心距和孔数应符合相关标准。

煤矿用涂层复合钢管用于煤矿的瓦斯气体输送时,需采用阻燃、抗静电环氧树脂矿用涂料,符合MT181规定的要求;如煤矿用涂层复合钢管用于煤矿压风、供排水时,则可以采用不含阻燃、抗静电的环氧树脂材料,但材料各项指标需满足CJ/T120-2016给水涂塑复合钢管标准规范。

IMG_20230520_095549.jpg

煤矿用涂层复合钢管的内外表面经过涂敷、粘结、固化后,环氧树脂涂层牢固的附着在管体表面,经过落锤冲击和撕裂试验,无破坏现象。煤矿用涂层复合钢管具有较强的耐酸碱性和耐腐蚀性,适用于煤矿井下高硫水质及含钙、镁等离子的水,表面光洁度高,流体阻力小,不会附着任何水垢,能减少二次污染。


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