A.5~10mm B.10~15mm C.15~20mm D.20~25mm
A.試驗壓力為設計壓力1.5倍 B.鋼管的試驗壓力不得低于0.4MPa C.聚乙烯管(SDR11)的試驗壓力不得低于0.2MPa D.聚乙烯管(SDR17.6)的試驗壓力不得低于0.4MPa E.水壓試驗壓力達到規(guī)定值后,穩(wěn)壓1h,觀察壓力計30min,無壓力降為合格