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

　　再生材料平均粒徑:聚氨酯保溫管可用于不超過(質(zhì)量)的清潔再生材料，但材料必須使用自己的產(chǎn)品。外保護管的體積不得小于立方米。炭黑的含量應(yīng)為(質(zhì)量百分比)，炭黑應(yīng)均勻分布在基體中。熔體流率和熔體流率是套管供方外護套管的數(shù)值，內(nèi)壁表面縱向收縮率不應(yīng)有裂紋、孔、泡等缺陷。外保護管的長期力學(xué)性能應(yīng)滿足長期力學(xué)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.

　　外保護管的更小壁厚應(yīng)與規(guī)定的外徑和壁厚相同，允許偏差應(yīng)與規(guī)定的偏差相同。當外部保護管焊接時，熔體流動速率的差異不應(yīng)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 /.

　　外保護管為黑色，聚氨酯保溫管內(nèi)表面和外表面不得有視障。無氣泡、裂紋、凹痕、雜質(zhì)、顏色不均勻等缺陷。管道兩端應(yīng)水平切割，垂直于管道軸線，角度誤差應(yīng)小于度數(shù)。在任何位置的拉伸屈服強度和斷裂伸長率不得小于。外護套管的縱向收縮不應(yīng)大于縱向收縮。

　　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.

　　以上是聚氨酯保溫鋼管廠家小編為大家介紹的相關(guān)內(nèi)容，想要了解更多內(nèi)容，歡迎訪問網(wǎng)站：http://www.qndr49.cn

　　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.qndr49.cn