Abstract:
On regarnit une canalisation existante (1) en introduisant un tube intérieur (2) en matériau thermosplastique, particulièrement en téréphtalate de polyéthylène, et en agrandissant ensuite son diamètre jusqu'à ce que ce tube intérieur (2) vienne s'appuyer étroitement contre la paroi intérieure de la canalisation (1). Pendant l'introduction du tube intérieur (2), le rapport entre le diamètre extérieur du tube intérieur (2) et le diamètre intérieur de la canalisation est inférieur à 0.6. Ce procédé est particulièrement adapté pour regarnir des canalisations existantes comportant, dans leurs parois, des substances qui peuvent se libérer dans un milieu véhiculé par une telle canalisation, par exemple une conduite d'eau potable en plomb. Un dispositif servant à introduire un tube intérieur (2) dans une canalisation (1) comprend une pièce d'accouplement (3) pourvue d'un orifice d'entrée (16) destiné à un fluide sous pression, une ouverture d'aération (7) et un manchon (14) servant à fixer le tube intérieur (2).
Abstract:
A method and a device for inserting a resin pipe into an outer pipe is provided to reduce stress caused by difference of heat-expansion coefficient between a metal pipe and the resin pipe by modifying using condition, especially, load condition of expansion and contraction according to temperature change and to reduce diameter of the resin pipe having a larger outer diameter than an inner diameter of the metal pipe. A method for inserting a resin pipe into an outer pipe, that is, a metal pipe comprises the steps for manufacturing the resin pipe and the metal pipe; reducing diameter of the resin pipe by pressing the resin pipe with a pressing body, such as a wheel press and a press bar(5); sealing both ends of a reduced resin pipe(1a); vacuuming the inside of the resin pipe; inserting the resin pipe; releasing the vacuumed state of the resin pipe; removing a sealing unit, that is, a sealing cap; and pressing and recovering the resin pipe.
Abstract:
PURPOSE: A polyvinylidene fluoride lined pipe connector and a manufacturing method thereof are provided to secure a semi-permanent life span by ensuring high electricity insulation and strength against ultraviolet rays and physical impacts. CONSTITUTION: A polyvinylidene fluoride lined pipe connector(P) comprises a pipe connector(1) which has flanges(2,2a) on both ends thereof and a polyvinylidene fluoride liner(l) which is coupled to the interior of the pipe connector. The polyvinylidene fluoride lined pipe connector has a tensile strength of 3.85-5.20kg/mm^2, a flexural strength of 6.05-7.70kg/mm^2, a flexural modulus of 110-140kg/mm^2, an impact strength of 3.8, a thermal conductivity of 0.1W/mk, a heat resistance of -40°C-130°C, a specific gravity of 1.75-1.78 g/cm^2, and a melting point of 180°C.
Abstract translation:目的:提供一种聚偏二氟乙烯内衬管连接器及其制造方法,其通过确保高的电绝缘性和抵抗紫外线和物理冲击的强度来确保半永久寿命。 构成:聚偏二氟乙烯内衬管连接器(P)包括管连接器(1),其两端具有凸缘(2,2a)和耦合到管连接器内部的聚偏氟乙烯衬垫(l)。 聚偏二氟乙烯内衬管连接器的拉伸强度为3.85-5.20kg / mm ^ 2,抗弯强度为6.05-7.70kg / mm ^ 2,弯曲弹性模量为110-140kg / mm ^ 2,冲击强度为3.8 ,热导率为0.1W / mK,耐热性为-40℃〜130℃,比重为1.75〜1.78g / cm 2,熔点为180℃。
Abstract:
PURPOSE: A polyvinylidene fluoride lined pipe and a manufacturing method thereof are provided to secure convenient construction of a polyvinylidene fluoride lined pipe because polyvinylidene fluoride lined pipes are used in high chemical concentrations at high and low temperatures. CONSTITUTION: In a polyvinylidene fluoride lined pipe, a polyvinylidene fluoride lined pipe(3) is coupled to the inside of a metal pipe(1) which has flanges(2) on both ends thereof. The polyvinylidene fluoride lined pipe has a tensile strength of 3.85-5.20kg/mm^2, a flexural strength of 6.05-7.70kg/mm, a flexural modulus of 110-140kg/mm, an impact strength of 3.8, a thermal conductivity of 0.1W/mk, a heat resistance of -40°C-130°C, a specific gravity of 1.75-1.78 g/cm^2, and a melting point of 180°C.
Abstract translation:目的:提供一种聚偏二氟乙烯内衬管及其制造方法,以确保聚偏二氟乙烯内衬管的方便施工,因为在高温和低温下以高化学浓度使用聚偏二氟乙烯内衬管。 构成:在聚偏二氟乙烯内衬管中,聚偏氟乙烯内衬管(3)连接到金属管(1)的内部,金属管的两端具有法兰(2)。 聚偏二氟乙烯内衬管的拉伸强度为3.85-5.20kg / mm ^ 2,弯曲强度为6.05-7.70kg / mm,弯曲弹性模量为110-140kg / mm,冲击强度为3.8,热导率为 0.1W / mK,耐热性为-40℃〜130℃,比重为1.75-1.78g / cm 2,熔点为180℃。
Abstract in simplified Chinese:本发明系关于一种无需底漆层或黏着剂即可黏附至导管表面且具体而言可黏附至油井管表面之四氟乙烯/全氟(烷基乙烯基醚)共聚物之预成形衬层。该衬层含有有效量的金属粉末以提供该衬层与该导管表面间之黏附。本发明亦系关于一种用于制造此导管之方法,其中在一较佳实施例中,该衬层被共挤出以形成一内层及一外层。此共挤出实施例尤其可用于需要高纯度之应用中。在此情况下,该内层含有有效量之金属粉末且该外层系纯四氟乙烯/全氟(烷基乙烯基醚)共聚物。