... Specifications: Diameter: 8 ≤ Φ273mm Tube length: 2 ~ 24m2. the test pressure: 10 ~ 100Mpa3. the holding time: 5 ~ 30 seconds ( ... :1. the manufacturing level: the introduction of automatic hydraulic test unit received, Germany, Japan, the type of unit technology ... hydraulic feed, high efficiency, pressure test period is short;2.10 the pressure test procedure manual and automatic control free to ...