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高温高压闸阀的试压方法
发布时间:2013-09-09 12:11:45
  易胜博官方网站的壳体试验是为了检验整个壳体的耐压能力。在壳体试验之前,不允许对易胜博官方网站涂漆或使用其他防止渗漏的涂层。但允许进行无密封作用的化学防锈处理。在试验过程中,不得对易胜博官方网站施加影响试验结果的外力。试验在保压和检测期间应维持不变。用液体试验时,应尽量排除易胜博官方网站体腔内的气体。在达到保压时间后,壳体不得发生渗漏或引起结构损伤。
  强度试验的方法和步骤:用液体试验时,易胜博官方网站试压充水时,要将阀内空气排净。试验台上部压盘,有排气孔,用小易胜博官方网站开闭。空气排净的标志是,排气孔中出来的全部都是水。关闭排气孔后,开始升压。升压过程要缓慢,不要急剧。达到规定压力后,检查壳体(包括填料函及阀体与阀盖的联接处)、是否渗漏,阀体外表面、阀盖、填料、丝堵孔等各处有无泄漏及渗汗现象,承压部位有无变形。无可见泄漏、变形;保压,压力不变为合格。随后打开排放阀,使体腔内压力缓慢降至零。
  密封试验是检验启闭件和阀体密封副密封性能的试验。将阀压紧后,试压泵工作,从试压泵的压力表上,可以读出易胜博官方网站承受压力的数字。密封试验之前,应除去密封面上的油渍。密封试验应在壳体试验后进行,易胜博官方网站体腔内完全充满试验介质,然后关闭易胜博官方网站,向易胜博官方网站一端施加试验压力,达到规定试验压力和规定保压时间后,然后应关闭上密封并向阀体内腔打压,使压力逐渐升高至产品图规定压力(不允许使压力急剧地增加),试验持续一定时间,在易胜博官方网站加压试验介质的下游端(在该密封副的另一侧)检测易胜博官方网站的泄漏无可见泄漏为合格。随后打开排放阀,使体腔内压力缓慢降至零。将易胜博官方网站颠倒过来,试验相反一侧,易胜博官方网站体腔内完全充满试验介质,然后关闭易胜博官方网站,向易胜博官方网站一端施加试验压力,达到规定压力后,在易胜博官方网站加压试验介质的下游端检测易胜博官方网站的泄漏。
  上密封的试验方法和步骤
  封闭易胜博官方网站进口和出口,放松填料压盖,易胜博官方网站处于全开状态,使上密封关闭,给体腔充满试验介质,并逐渐加压到规定的试验压力,使压力逐渐升高至产品图规定压力(不允许使压力急剧地增加),试验持续一定时间,检查填料处有无泄漏。无可见泄漏为合格。随后打开排放阀,使体腔内压力缓慢降至零。
  观察上密封处是否有泄漏。
  试验合格后,应及时排净内部积水,并吹干,关闭易胜博官方网站,封闭出入口,并作出明显标记(已试过压的标记)。
 
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