What should be paid attention to when welding galvanized steel pipe
1. Need to polish in the early stage However, the galvanized layer of the weld must be polished away, otherwise bubbles, trachoma, and false welding will occur. It also makes the weld brittle and the...
What is stick welding?
Stick welding is also known as shielded Metal Arc welding (SMAW) or manual metal arc welding(MMA) . Stick welding is an arc welding process in which coalescence of metals is produced by heat from an...
Rock drilling machinery and pneumatic tools
During operation, one hopper of the fuselage discharges material to both sides. The small diameter front wheel drives the steering wheel. The larger diameter rear wheels are the rollers. The engine...
Reasons and Judgment of Drill Pipe Drill Down in Rotary Drilling Rig
Reasons and Judgment of Drill Pipe Drill Down in Rotary Drilling Rig After the current rotary drilling rig is used for a period of time, when the drill rod is raised or lowered to return the...
Mr. Liu Bin
