Development of polyurethane insulated steel pipe and high density polyethylene plastic. Antioxidants, UV stabilizers, carbon black (or carbon black masterbatch preparation) and other additives are used to promote the production of the outer protective tube and improve the performance of the outer protective tube. The addition of carbon black shall meet the following requirements: density: cubic meter; extraction amount of toluene: less than (mass percentage); Mimi

　　再生材料平均粒径:聚氨酯保温管可用于不超过(质量)的清洁再生材料，但材料必须使用自己的产品。外保护管的体积不得小于立方米。炭黑的含量应为(质量百分比)，炭黑应均匀分布在基体中。熔体流率和熔体流率是套管供方外护套管的数值，内壁表面纵向收缩率不应有裂纹、孔、泡等缺陷。外保护管的长期力学性能应满足长期力学性能的要求。

　　Average particle size of recycled materials: polyurethane insulation pipe can be used for cleaning recycled materials with no more than (quality), but the materials must use their own products. The volume of external protection pipe shall not be less than cubic meter. The content of carbon black shall be (mass percentage), and carbon black shall be evenly distributed in the matrix. The melt flow rate and melt flow rate are the values of the outer casing provided by the casing supplier. The longitudinal shrinkage of the inner wall surface shall be free of cracks, holes, bubbles and other defects. The long-term mechanical properties of the outer protective tube shall meet the requirements of the long-term mechanical properties.

　　外保护管的更小壁厚应与规定的外径和壁厚相同，允许偏差应与规定的偏差相同。当外部保护管焊接时，熔体流动速率的差异不应大于2 /。

　　The minimum wall thickness of the outer protection pipe shall be the same as the specified outer diameter and wall thickness, and the allowable deviation shall be the same as the specified deviation. When the outer protective tube is welded, the difference of melt flow rate shall not be greater than 2 /.

　　外保护管为黑色，聚氨酯保温管内表面和外表面不得有视障。无气泡、裂纹、凹痕、杂质、颜色不均匀等缺陷。管道两端应水平切割，垂直于管道轴线，角度误差应小于度数。在任何位置的拉伸屈服强度和断裂伸长率不得小于。外护套管的纵向收缩不应大于纵向收缩。

　　The outer protective tube shall be black, and there shall be no visual barrier on the inner surface and outer surface of polyurethane insulation tube. No bubble, crack, dent, impurity, uneven color and other defects. Both ends of the pipe shall be cut horizontally, perpendicular to the pipe axis, and the angle error shall be less than the degree. The tensile yield strength and elongation at break at any position shall not be less than. The longitudinal shrinkage of outer casing shall not be greater than the longitudinal shrinkage.

　　以上是聚氨酯保温钢管厂家小编为大家介绍的相关内容，想要了解更多内容，欢迎访问网站：http://www.sdhpgy.com

　　The above is the relevant content introduced by the small edition of polyurethane insulated steel pipe manufacturer. If you want to know more, please visit the website: http://www.sdhpgy.com