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Rectangular tubes need to be pickled during surface treatment such as electroplating. At present, the pickling solution used is transitioned from a single acid solution to a mixed acid solution and...

When we weld square tubes, we should pay attention to the following eight points: (1) Before igniting the welding spray gun of the square rectangular tube, check the air tightness of the air val...

When using spray de-rusting for square and rectangular pipes, the following five points should be paid attention to: (1) Spray abrasive In order to achieve the ideal rust removal effect, the ...

The cold roll forming process is a very complicated process. If the design is not reasonable, various deformation defects will appear during the debugging process. Once these faults are found, they...

When we weld the rectangular tube underwater, we should pay attention to prevent electric shock. In this regard, the following eight measures can be taken:

During the production and transportation of square tubes, oil stains will inevitably be attached to the surface, which will affect the quality of rust removal and phosphating, and reduce the bondin...

1. Technical conditions The performance indicators and quality requirements stipulated in the standard are called technical conditions, such as chemical composition, external dimensions, surface...

When we produce straight seam square tubes, we generally go through the following process steps: (1) Plate inspection: After the steel plate used to manufacture large-diameter submerged arc weld...

Galvanized square rectangular tube is a hollow square tube with a square cross-section shape and size made of a hot-rolled or cold-rolled galvanized strip or galvanized coil as a blank after cold b...

1. Inspection of steel sheet piles For steel sheet piles, there are generally material inspections and appearance inspections in order to correct unqualified steel sheet piles and reduce difficult...

The hot-dip galvanized steel grating has a higher zinc content on the surface than the cold-dip galvanized steel grating of the ordinary process, so it has better corrosion resistance. It generall...

The surface aesthetics of zinc-aluminum-magnesium coils can be evaluated by checking the surface flatness, color uniformity, etc., as follows: observe whether the surface of zinc-aluminum-magnesium...