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                                        安全閥壓力試驗機的試驗方法

                                        2014-04-07 0

                                        1、耐壓(液壓強度)試驗

                                        應當符合以下要求:

                                        (1)安全閥耐壓(液壓強度)試驗在涂(噴)漆之前進行;

                                        (2)封閉安全閥閥座的密封面,對安全閥進口側體腔進行耐壓(液壓強度)試驗,最小試驗壓力為安全閥公稱壓力(壓力級)的1.5倍;

                                        (3)對于向大氣排放的安全閥或者僅在排放時產生背壓力的安全閥,不要求在閥體出口排放側進行耐壓(液壓強度)試驗;

                                        (4)當安全閥承受附加背壓或者安裝于封閉的排放系統時,則需要在閥體出口排放出口排放側進行耐壓(液壓強度)試驗;

                                        (5)耐壓(液壓強度)試驗持續時間按GB/T12241-2005《安全閥 一般要求》的規定,并且對閥體(蓋)各表面和連接處進行宏觀檢查。如果試驗過程中沒有出現變形、裂縫與泄漏等現象。則表明耐壓(液壓強度)試驗合格。

                                        2、氣密封試驗

                                        對于封閉式安全閥、整體組裝后,應當進行氣密封試驗。氣密封試驗應當符合以下要求:

                                        (1)試驗只在閥體出口排放側部位進行,壓力為最大背壓力,并且不小于0.2MPa;

                                        (2)試驗持續時間3min,不允許泄漏;

                                        (3)試驗時要注意安全,達到試驗壓力一定時間后再進行氣密性檢查。

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