水压试验用的螺栓? if the bolt size exceeds 1 3/4” un8 (m39) diameter, flanges shall be designed to allow the use of hydraulic bolt tensioning equipment . hydraulic bolt tensioners do not have to be used to make the joint but the flange design must allow their use later if necessary. 如果螺栓直径尺寸超过了 1 3/4” un8 (m39),法兰的设计应允许使用水压螺栓张力装置,水压螺栓张力器不一定要连接在法兰上,但法兰的设计必须满足日后使用水压张力装置的需要。 查看更多