陶瓷树脂内衬复合钢管的开发及应用研究

采用树脂材料密闭离心铝热法制备陶瓷内衬钢管陶瓷层气孔、裂纹等缺陷 ,从而获得具有防腐耐磨双重功能的复合管材。产品可在真空状态下长期运行 ,内衬层与钢管基体结合强度高 ,在高温下内衬不鼓泡、褶皱。     

陶瓷树脂内衬复合钢管的开发及应用研究

采用树脂材料密闭离心铝热法制备陶瓷内衬钢管陶瓷层气孔、裂纹等缺陷，从而获得具有防腐耐磨双重功能的复合管材。产品可在真空状态下长期运行，内衬层与钢管基体结合强度高，在高温下内衬不鼓泡、褶皱。     

涤纶纤维增强聚乙烯复合管承压性能模拟

针对纤维增强塑料复合管实物承压性能测试工作量大、成本高以及影响因素不明确等问题,采用有限元模拟分析法研究了复合管生产工艺对承压性能的影响。依据公称直径150 mm、公称压力2.5 MPa涤纶纤维增强塑料复合管的结构及材料特征,采用Halpin-Tsai模型法建立了复合管的有限元模型,研究了纤维铺层数量、纤维缠绕角度以及内衬层壁厚等工艺参数对复合管承压性能的影响。结果表明,采用建立的复合管模型模拟计算的管材爆破压力为11.105 MPa,与实物管材水压爆破值10.75 MPa的相对误差仅为3.302%。增加纤维层的数量、纤维缠绕角度以及内衬层壁厚均可提高复合管的承压性能。综合考虑制造成本和生产效率,分析获得涤纶纤维增强聚乙烯复合管最佳生产工艺参数为纤维铺层数为4层、纤维缠绕角为56°、内衬层最小壁厚为9 mm。     

一种可盘绕式玻纤增强复合管

正本实用新型公开了一种可盘绕式玻纤增强复合管,包括复合管本体,复合管本体的顶部表面黏贴有防水膜,防水膜上安装有刻度线,复合管本体的内部安装有内衬层,内衬层的内部黏贴有防腐蚀层,内衬层的上方安装有玻璃纤维层,玻璃纤维层通过若干个支撑条安装在内衬层上,支撑条与内衬层和玻璃纤维层之间形成容腔,容腔的内部填充有保温棉,玻璃纤维层上黏接有聚乙烯塑料层,聚     

玻纤带增强黏合型HDPE内衬柔性复合管性能试验研究

本文通过介质相容性、耐气体渗透性测试以及抗开裂稳定性、最小弯曲半径、爆破压力等试验研究了新型RTP管材-玻纤带增强黏合型HDPE内衬柔性复合管基本性能;通过试验结合理论分析优化了管材强度设计计算方法.实验表明,HDPE材料在80℃酸性水环境下1500h,屈服强度、断裂伸长率降低率仅为1.33％和6.0％;管材在60℃下...     

碳钢内衬625合金复合管设计技术研究

对于高含硫化氢(H_2S)等腐蚀性介质的石油天然气管道,传统的防腐措施难以满足日益发展的工程需要,通过对碳钢内衬英科耐尔(Inconel)625合金复合管设计技术研究,基于625材料良好的抗硫化氢性能,可以有效提高625合金复合管质量,使镍基合金双金属复合管以更加优异的力学性能和耐蚀性能而得以在高含硫化氢(H_2S)等腐蚀性介质的石油天然气管道中更加广泛的应用。     

国产聚乙烯内衬材料在油田加剂集输工况的适用性

为明确复合管内衬材料在油田加剂(添加破乳剂、缓蚀阻垢剂)集输工况的适用性,以采出油和采出水为介质,采用反应釜构建油田加剂集输服役环境来分析国产JHMGC100GW型高密度聚乙烯(PE-HD)试样在压力0.8 MPa、温度25℃的加剂条件下浸泡介质前后的形貌和性能变化.结果表明,无论加剂与否,试样在集输介质中浸泡后均产生...     

FRP塑料复合管道内衬层的加工工艺与技术要点分析

随着社会、企业的发展,许多的工程所用材料要求越来越高。FRP塑料复合管道是一种新型的利用玻璃钢围绕塑料内衬管外部来制作的复合材料。本文主要探析FPR塑料复合管道内衬管道的加工工艺和技术进行一定深度的探讨。     

复合管在硫酸铵生产中的应用研究

介绍了硫酸铵母液对316L不锈钢管道的腐蚀情况和腐蚀原因,分析了内衬玻璃钢管、钢骨架聚乙烯塑料复合管、钢衬聚乙烯管道的特点以及在硫酸铵生产中的使用情况。经对比,钢骨架聚乙烯塑料复合管是理想材料。     

PVC/FRP复合管层间粘接剂的研究

一、前 言 聚氯乙烯/玻璃钢(PVC/FRP)复合管具有耐化学腐蚀、耐内压、耐热、耐冲击性能好等一系列优点,因而成为石油化工等工业中广泛应用的一种管道。本文讨论的复合管是用浸了聚酯树脂的玻璃纤维在硬聚氯乙烯内衬上缠绕而成的成型是在加热条件下迅速连续完成的。因此内衬层(PVC)和结构层(FRP)的层间粘接剂的研究便成为保证复合管道具有优良性能的关键。     

半水-二水磷酸生产中管道材质的选用

根据半水-二水湿法磷酸生产过程中输送介质磷酸浓度高、温度高、含固体悬浮物的特性,介绍了不同材质管道的使用情况,并结合生产对管材的要求,对玻璃钢管、PP管、钢衬PO管、不锈钢管、钢骨架复合管的选择作了综述.认为钢骨架复合管道以其耐腐蚀、不易结垢、易清理的优势更适用于半水-二水磷酸的物料输送.     

柔性塑料保温管及其生产技术

柔性塑料保温管是由介质管、保温层、夹克管构成的复合型保温管,采用薄壁钢、软铜或交联聚乙烯这类具有柔韧性的材料作为介质管,同样采用具有高度柔韧性的聚氨酯泡沫保温层和聚乙烯夹克管,通过连续法生产工艺技术生产出性能优良,符合使用要求的柔性复合保温管。     

X射线无损检测技术在铝塑复合管中的应用

采用X射线无损检测技术,对铝塑复合管的内部结构进行检测。通过分析铝塑复合管中铝层的结构状态,可以判断管材耐压性能的优劣。X射线无损检测技术具有快速、简便、直观等特点,是一种新型的铝塑复合管测试方法。     

On the possibility of Detecting Case/Liner and Liner/Propellant Debonds in a Rocket Motor by means of the ultrasonic multiple reflection pulse echo technique

In order to examine whether and to what extent the ultrasonic multiple reflection technique can be used for detecting case/liner and liner/propellant debonds, measurements were performed on samples sawn from a particular case-bonded rocket motor consisting of a layer of 2.4 mm steel, a layer of 1,3 mm liner material (a polymer) and a thick layer of composite (AP/PU) propellant respectively. It was found that case/liner debonds could be traced reasonably well; liner/propellant debonds, however, could not be evidenced owing to strong quenching of the ultrasound in the liner. Investigations of the texture of the liner material with the aid of a scanning electron microscope proved the strong quenching in the liner to be mainly due to the presence of many voids with diameters of some 50 μm–200 μm which strongly disperse the sound beam.     

挤出成型三层复合保温管

三层复合保温管是以聚氯乙烯软料与硬料挤出复合缠绕管为内管,缠绕发泡塑料条为夹层,再以软聚氯乙烯为外保护层的功能性管材。主要用于制冷设备如冷冻机、冰箱、空调器。该产品的成型设备替代了用手工缠绕的成型方法。     

热载荷对冷拔20/316L复合管结合强度影响的数值模拟及试验研究

为了探讨热载荷对冷拔20/316L双金属复合管内、外管间结合强度即残余接触压力的影响,运用有限元分析软件ABAQUS6.5模拟研究了复合管的拉拔成型过程,并通过重启动分析模拟了热加载、卸载时复合管应力状态及残余接触压力的变化,分析了不同温度对冷拔20/316L复合管残余接触压力的影响。结果表明,300℃是衬管发生弹性与塑性变形的临界温度,350℃是基管与衬管发生脱离的起始温度。最后通过复合管拉拔试样的热载荷试验,验证了数值模拟的正确性。     

Material characterization of components and assembled behavior of a composite liner for rehabilitation of cast iron pressure pipes

Work is underway to determine the stability limit states for a cast in place composite liner system used to repair cast iron pressure water pipes. To establish its performance in bridging ring fractures, perforations, and other failures in the cast iron “host” pipe, it is important that the material characteristics of this composite liner be determined. This study characterizes the mechanical properties of this liner in both the longitudinal and circumferential directions, and develops a method to achieve this goal. A technique is developed to form the liner from its individual components and prepare coupons with end tabs. Test results for coupons oriented parallel to the axis of the pipe (i.e., in the longitudinal direction) agree well with those obtained from coupons cut from a liner exhumed from an actual field installation. Since the coupons formed in the laboratory are flat, the same technique is used to test the liner in the hoop (or circumferential) direction. Tensile strength and stiffness in the hoop direction are 45% higher than that in the longitudinal direction. Tests performed on the individual components of the liner are also reported, and these explain the bilinear stress–strain response. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers     

钢丝缠绕增强塑料复合管的应力分析

将钢丝缠绕增强塑料复合管(PSP管)简化为内层、复合层、外层三层结构组成的力学模型,其中复合层由内外两层单层板组成。采用串并联模型确定单层板弹性参数,通过正交各向异性材料三维弹性理论推导出各层界面上接触压力与轴向力的方程组,进而得到PSP管各层在内压、外压和轴向力联合作用下的应力及应变计算公式。实验结果表明：随着内压载荷的增加,PSP管环向应变与轴向应变均呈上升趋势,理论值与实验结果较为一致,所建模型可用于预测PSP管应力和应变。     

两种蒸汽管道弯头修换工艺对比研究

蒸汽管道弯头工作时处于高温高压的状态,受到气流直接冲击后,管道内壁极易减薄甚至穿孔。针对某蒸汽管路弯头出现的腐蚀穿孔情况,拟采用离心自蔓延法和进行修换。试验证明,离心自蔓延法制备的陶瓷内衬层内表面存在大量细小的微裂纹,且钢管基体严重氧化,采用粘接内衬Al2O3陶瓷的方法制备的弯头对蒸汽管路无明显影响,且耐冲刷性能优于前者。     

Preparation and properties of gas barrier resin/rubber nanolaminated composites

An extremely high gas barrier resin was highly oriented and uniformly distributed in a rubber matrix layer by layer by the micro‐layer coextrusion technology and a special composite laminating device. The resulting composite had excellent gas barrier properties because of its alternating multilayer structure. Experimental tire samples were prepared and tested for high‐speed, endurance, and pressure performance. The results showed that because the barrier resin was evenly dispersed in the rubber matrix, the tire inner liner made of the composite showed excellent fatigue resistance and gas barrier performance. POLYM. ENG. SCI., 55:190–195, 2015. © 2014 Society of Plastics Engineers