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                                        閥門試壓方法之安全閥試壓

                                        2016-11-09 0

                                        安全閥各項性能試驗參照GB/T12242–1989安全閥性能試驗方法,通常包括三個方面:強度試驗、密封性試驗和定壓試驗。今天就來簡單了解下這三方面試驗的方法:

                                        u 安全閥的強度試驗與其他閥門一樣,是用水作試驗的。試驗閥體下部時,壓力從進I=I端引入,密封面封閉;試驗閥體上部和閥蓋時,壓力從出El端引入,其他端封閉。在規定時間內閥體和閥蓋無滲漏現象為合格;

                                        u 密封性試驗和定壓試驗,一般使用介質是:蒸汽用安全閥以飽和蒸汽為試驗介質;氨或其他氣體用閥以空氣為試驗介質;水和其他非腐蝕性液體用閥以水為試驗介質。對于一些重要位置的安全閥常用氮氣為試驗介質。

                                        密封試驗以公稱壓力值為試驗壓力進行試驗,其次數不少于兩次,在規定時間內無滲漏為合格。驗漏方法有兩種:

                                        一是將安全閥各連接處密封,用黃油把薄紙封貼在出El法蘭上,薄紙鼓起為漏,不鼓起為合格;

                                        二是用黃油把薄塑料板或其他板封貼在出口法蘭下部,灌水封住閥瓣,檢驗水中不冒泡為合格。安全閥定壓和回座壓力試驗次數不少于3次,符合規定為合格。 

                                        億威仕公司專業研發生產閥門試壓設備,安全閥校驗檢定設備,適用于各類型閥門的試驗需求,歡迎咨詢:0755-8889 8859 QQ459675648.

                                        北京赛车计划数据
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