Spiral welded steel pipes are made of low carbon as well as micro alloyed HSLA steel from hot rolled substrate developed at U. S. Steel Košice. While the apparent advantage is clear, a critique of seamless piping is that the rolling and stretching method produces an inconsistent wall thickness compared to the far more precise thickness of …
Month: July 2020
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A resistor-capacitor network called a “snubber” can be connected in parallel with a switch contact to reduce contact arcing. When the switch is closed, current flows and the LED can illuminate. Switch contacts suffer greater duress switching DC than AC. This is primarily due to the self-extinguishing nature of an AC arc. More complex proximity …