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                                        氣瓶水壓內測法的缺點

                                        2012-08-28 0

                                        上一期小編帶大家學習了“氣瓶水壓內測法的三大優點”,想心很多看官看完之后,也會想,氣瓶水壓內測法的缺點是什么呢?今天小編就來帶大家探討一下氣瓶水壓內測法的缺點:

                                        缺點一

                                        氣瓶及試壓管道內存在氣體且這些氣體不易排除掉;

                                        缺點二

                                        試驗時水溫的差別使計算時水的平均壓縮系數與實際不符;

                                        缺點三

                                        沒有校訂歸零管道的殘余變形率,而將管道的殘余變形率計入氣瓶的殘余變形率。由于氣瓶及試壓系統內裝滿水后仍然存在氣泡,無論采取何種排空方式均不能將其消除。當系統壓力升高,一部分氣體被高壓水溶解,而其它部分則被壓縮,故進水量的一部分將填充這些氣泡原來的空間使進水量加大,而多出來的進水量被計人全變形量,使計量的全變形量比實際的全變形量大。當泄壓后,這部分氣泡基本恢復原狀,一部分與水返回量筒進入大氣,這樣泄壓后使回水減少,即殘余變形值增大,但是氣泡對殘余變形值影響相對大一些,從而計算出的殘余變形率比實際要大,這便造成本來殘余變形率合格的產品可能被視為不合格,加大了產品報廢的危險。

                                        好了,以上就是氣瓶水壓內測法的不足之處了,學習完了氣瓶水壓內測法的優缺點之后,大家對氣瓶水壓內測法的掌握是不是更加熟悉了呢?下一篇,小編將帶大家來學習“氣瓶水壓外測法”的優缺點,是不是有點小期待呢?

                                        深圳億威仕專業生產氣瓶水壓試驗機、瓶閥密封性能試驗機等壓力容器相關的試驗設備,歡迎詢價!

                                        北京赛车计划数据
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