PE 管怎么接才牢固?3 种核心连接方式实操指南

2025-09-13

PE管因具有耐腐蚀、柔韧性好、使用寿命长等优点,被广泛应用于给排水、燃气输送等领域。而连接的牢固性直接关系到管道系统的安全运行和使用寿命。本文将详细介绍PE管常用的3种核心连接方式及其实操要点,帮助您确保PE管连接的质量。

第一种是热熔对接连接。这是大口径PE管最常用的连接方式,适用于管径≥90mm的管道。操作时,首先要将待连接的两根PE管端部切割平整,并清理干净端口和加热板,确保无油污、杂质。然后将管材固定在对接设备上,调整管材使其轴线对齐,错边量不应超过管材壁厚的10%。接着,加热板预热至规定温度(通常为200-230℃,具体根据管材规格和材质等级确定),将加热板放置在两管端之间,施加压力使管材端面与加热板接触,直至两端面均出现均匀的熔融环。达到加热时间后,迅速移开加热板,立即将两管端施压对接,使熔融部分充分融合,并保持对接压力直至接口冷却固化。整个过程中,加热温度、加热时间和对接压力是影响连接质量的关键参数,必须严格按照设备说明和管材要求执行。

第二种是热熔承插连接。该方式多用于管径≤63mm的PE管连接,操作相对简便。首先同样需要切割管材,保证端面垂直于轴线,并清理干净。然后使用专用的热熔承插工具,将管材插入端和管件承口同时加热。加热时,管材插入端应均匀旋转,确保加热均匀,达到规定的加热时间后,迅速将管材插入管件承口至标记深度,保持位置直至冷却。注意加热温度和时间需根据管材和管件的规格选择合适参数,插入时应平稳,避免产生扭曲。

第三种是电熔连接。电熔连接通过电熔管件内埋的电阻丝通电发热,将管件与管材的连接部位熔融实现连接,适用于各种管径,尤其在抢修、狭小空间或对连接质量要求极高的场合优势明显。操作前,需检查电熔管件是否完好,管材端面是否平整清洁,并在管材插入端划出插入深度标记。然后将管材插入电熔管件至标记位置,确保管材与管件同轴。接着用专用夹具固定好管材和管件,连接好电熔焊机的导线。根据电熔管件上的条形码或参数表,输入焊接电压和时间,启动焊机进行焊接。焊接完成后,需冷却至规定时间方可拆除夹具。电熔连接的关键在于保证管材插入到位、接触良好,以及严格按照管件要求的参数进行焊接。

无论采用哪种连接方式,连接前的准备工作都至关重要,包括管材的检查、清洁、切割和校直。连接过程中,要严格控制加热温度、时间和压力(针对热熔连接),确保熔融充分且不过度。连接后,需等待接口完全冷却固化,避免外力干扰。此外,操作人员应经过专业培训,熟悉所用设备和材料的特性,才能从根本上保证PE管连接的牢固性和密封性。选择合适的连接方式,并严格遵循操作规程,是确保PE管道系统安全稳定运行的基础。



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