液壓扳手的使用范圍廣泛；在船舶工程，石油化工，風電，水電，熱電，礦山，機械，鋼廠，橡膠，管道等行業(yè)的施工，檢修，搶修等工作中，液壓扭矩扳手對于大規(guī)格的螺栓的安裝與拆卸都是一種較為重要的工具；有其它工具的不可替代性，不僅使用方便，而且所提供的扭矩非常精準，扭矩重復精度達到3%左右。
The hydraulic wrench is widely used; in the construction, overhaul and rush repair of shipbuilding, petrochemical, wind power, hydropower, thermoelectricity, mining, machinery, steel plant, rubber, pipeline and other industries, the hydraulic torque wrench is an important tool for the installation and disassembly of large-scale bolts; there are irreplaceable other tools, not only convenient to use, but also The torque provided is very accurate, and the torque repetition accuracy is about 3%.
液壓扳手選購應注意哪些？
What should be paid attention to when choosing hydraulic wrench?
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① Bolt size
通常有好幾種螺栓，公制或者是英制的，同種公制的螺栓，選用同種型號的液壓扳手，當螺栓規(guī)格跨度較大的時候，預緊螺栓時就要選用多種型號的扳手。
There are usually several kinds of bolts, metric or English, metric bolts of the same type, and hydraulic wrenches of the same type are selected. When the bolt specification span is large, multiple types of wrenches should be selected when pre tightening the bolts.
②扭矩要求
?、?Torque requirements
螺栓的規(guī)格、螺栓的強度等級是液壓扭矩扳手選型的更關鍵參數。螺栓不同，扭矩不同，同樣的螺栓強度等級不同扭矩不同，同樣螺栓強度等級，不同工況的扭矩也不同。
The specification and strength grade of bolts are the most important parameters for the selection of hydraulic torque wrench. Different bolt, different torque, the same bolt strength level, different torque, the same bolt strength level, different torque under different working conditions.
?、勐菟菽缚臻g位置
③ Space position of bolt and nut
如果沒有空間限制，哪個型號的扳手都可以使用；驅動式液壓扳手更為通用；如螺栓擰好后露出的螺紋較長或者螺栓上面有空間有限，更好使用中空式液壓扳手；如螺母間距離狹窄，可選用中空式液壓扳手。
If there is no space limit, any type of wrench can be used; the driving hydraulic wrench is the most universal; if the thread exposed after the bolt is screwed is long or there is limited space on the bolt, it is better to use the hollow hydraulic wrench; if the distance between the nuts is narrow, the hollow hydraulic wrench can be selected.
