What is Electric Fusion Welding (EFW) and Electric Resistance Welding (ERW)
Electric fusion welding is the combination of metal and metal by heating one or several consumable electrodes and the workpiece. Electric resistance welding is a welding process that uses a strong cur...
Difference Between Oil Pipe and Oil Layer Casing
Tubing and casing are both indispensable in oil exploration.
Tubing is a pipe that runs into the casing of an oil well during normal production of the oil well. In the spout well, the oil flow flows i...
High Frequency Resistance Welded Pipe
High frequency resistance welded pipe is a welding method used to heat the resistance generated by the high frequency current flowing through the continuous contact surface of the workpiece, as long a...
Difference Between Oil Casing and Oil Drill Pipe
The casing is used to strengthen the well wall, and the inner and outer diameters are much larger than the drill rod; the drill rod is used to connect the drill collar and the drill bit, and the lengt...
Affected by the COVID-19: the Global Seamless Steel Pipe Plant Has Reduced its Output to Upgrade
The epidemic situation of new coronary pneumonia in foreign countries is becoming more and more serious. Affected by the COVID-19 situation, global steel mills have reduced their output of production,...
Disadvantages of Hot Rolled 20 # Straight Seam Steel Pipe
Disadvantages of hot rolled 20 # straight seam steel pipe:
1. Residual stress caused by uneven cooling. Residual stress is the stress of internal self-phase balance without external force. Hot-rolled ...
