Classification, use and common material chemical elements of square and rectangular tubes
2020-11-20
The classification, use and common material chemical elements of square and rectangular tubes The square and rectangular tubes are classified by process according to consumption process: hot rolled seamless square tubes, cold drawn seamless square tubes, extruded seamless square tubes and welded square tubes. The welded square tubes are divided into: 1. By process - arc welded square tubes, resistance welded square tubes (high-frequency, low-frequency), gas welded square tubes, furnace welded square tubes 2. By weld
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