What are the methods of quenching and tempering welded pipe?Quenching and tempering treatment: The heat treatment method of high temperature tempering after quenching is called quenching and tempering treatment. High temperature tempering refers to tempering between 500-650°C. Quenching and t
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What are the ways to perforate square tube blanks?1. Push rolling piercingPush rolling piercing can be regarded as an improved form of pressure punching, that is, the fixed round die during pressure punching is changed to a pair of rolls with a circular pass. When the roll rotates to bite the rectan
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As a pillar-like existence in the greenhouse, the square tube can be said to be indispensable. Compared with round tubes and oval tubes, square tubes are easier to cut and weld, and can easily handle most hoop accessories.In actual use, the common dimensions of galvanized steel pipe for greenhouse a
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1 Control of weld gapIn the high frequency welding process, the strip steel is sent to the welded pipe unit, rolled by multiple rollers, and the strip steel is gradually rolled up to form a circular tube blank with an opening gap. and make the ends of the welding joint flush. If the gap is too large
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