波纹管的高密度聚乙烯的生产线进行预应力水泥。 当孔材料被破坏，水泥是预应力钢中的预应力混凝土结构的最后一个安全宁静。 作为一种新型的孔材料，有精神波纹管的管具有以下优点：将原料SBG（B）的塑料波纹管是高密度聚乙烯。 其耐蚀性远优于精神与酸和碱的腐蚀，并能有效地保护预应力筋不受腐蚀。 很多预应力结构立场严重影响外部世界，如除冰盐或盐水。 当后张构件成为失败由于防水层，微裂缝和泄漏阻塞排水设备的崩溃的预应力筋可侵蚀。 在FIP施工手册（1990）预应力筋灌浆指出，精神管不具有永久防锈能力，而不能抵抗漏水并到达水泥和预应力钢筋。 然而，SBG（B）的塑料波纹管可以提供一个保护罩用于预应力肌腱远远优于心理波纹管，它可以防止贯通管的有害物质的污染，并且保证了后张构件结构具有更好的 耐力; 同时，SBG（B）的塑料波纹管保存孔道的摩擦系数明显高于心理波纹管的较小和拉伸过程中降低施加预应力的摩擦损失。 通常，塑料波纹管的摩擦系数是0.14，而心理波纹管的摩擦系数是0.25; 具有强度高SBG（B）塑料波纹管可以站在干扰的，不容易受振动碎裂被打破; 其密封性能和防渗漏性能超过精神波纹管，更适用于真空灌浆。

HDPE production line of corrugated pipe for pre-stress cement. When the hole material is destroyed, the cement is the last safety serene of pre-stress steel in the pre-stress concrete structure. As a new type hole material, compared with mental corrugated pipe the tube has the following advantages: the raw material of SBG (B) plastic corrugation pipe is HDPE. Its corrosion resistance is far superior to mental with acid and alkali corrosion, and it can protect pre-stress tendon from corrosion effectively. Many pre-stress structures stand severe influence in external world, such as deice salt or brine. The pre-stress tendon may be eroded when post-tensioned member becomes a failure due to collapse of waterproof layer, micro-fissure leakage and obstruction of drain equipment. Pre-stress tendon grouting in FIP Construction Manual (1990) points that mental pipe doesn't have permanent anticorrosive ability, and can't resist the water leakage and reach the cement and pre-stress tendon. However, SBG (B) plastic corrugated pipe can provide a protective shield for the pre-stress tendon far superior to the mental corrugated pipe, which can prevent the harmful material's pollution of penetrating pipes, and ensures that the post-tensioned member structure has better endurance; Meanwhile, the friction coefficient of preserved pore path of SBG (B) plastic corrugated pipe is obviously smaller than that of mental corrugated pipe and reduces the pre-stressing friction loss during the stretch. Generally, the friction coefficient of plastic corrugated pipe is 0.14, while the friction coefficient of mental corrugated pipe is 0.25; with high strength SBG (B) plastic corrugated pipe can stand jamming on, not easy to be broken by vibrator chipping; its sealing performance and anti-leakage performance surpass the mental corrugated pipe, more suitable for vacuum grouting.