124/5000 THE IRON OR STEEL PIPES ARE HOLLOW BARS OR PIECES GENERALLY WITH SQUARE, RECTANGULAR AND ROUND SHAPES OR SECTION.
THERE ARE THREE TYPES OR METHODS OF MANUFACTURE:
· With longitudinal welding, where it starts from a strip of sheet which is profiled by a system of rollers giving the shape and diameter to be made and a straight weld throughout the length of the bar. For its application in metallic carpentry and construction in general is the most commercial.
Without welding, where the previously heated ingot is subjected to an extrusion process to give it the section and diameter to be manufactured. It is the most suitable for pressure containment purposes due to the homogeneity it maintains in all its directions.
· With helical or spiral welding, where said welding is done as if it were threaded all along the bar.
Depending on the type of veneer with which it is made, we can find different qualities and types of steel used.
THE MOST COMMON THINGS WE CAN FIND IN DISTRIBUTION WAREHOUSES ARE COLD LAMINATED TUBES OF THICKNESSES LIKE 0.8 - 1 AND 1.2 MM (WITH APPLICATIONS LIKE FABRICATION OF FURNITURE, LEISURE ELEMENTS, METAL CARPENTRY, etc.) , THE BLACK TUBES WITH SURFACE FINISHING WITHOUT SURFACE TREATMENT, THE DECAPATED TUBES WHICH ARE PERFORMED WITH PREVIOUSLY CLEANED FLEXES AND TREATED WITH AN OIL FILM THAT HELPS PROTECT THEM FROM THE CORROSION AND GALVANIZED TUBES CHARACTERIZED BY THEIR CORROSION RESISTANCE, THAT THEY ARE MANUFACTURED SINKING A STRAP OR PLATE WHICH PREVIOUSLY APPLIED A FINE ZINC COVER OR WELL AS POSTERIORI SUBMERSED IN ZINC BATHS.
ALL THEY ARE USED IN APPLICATIONS FOR THE CONSTRUCTION, AUTOMOBILE, GREENHOUSES, CLOSURES, HEAVY AND LIGHT MACHINERY, SIGNALING, METALLIC CARPENTRY..ETC.WE ALSO FOUND THE SO-CALLED DRIVE OR PRESSURE TUBES, WHICH MAY BE FLAT OR THREADED AND FINISHED IN BLACK THE GALVANIZED. ARE INDICATED FOR DRIVE APPLICATIONS OF SANITARY WATER AND GAS, MINING, IRRIGATION, FIRE FACILITIES AND GENERAL INDUSTRY.
ALL OF THEM SHOULD MEET THE QUALITY AND NECESSARY REGULATIONS FOR THE CALCULATION AND APPLICATION TO BE SAFETY AND GUARANTEE. FOR THAT THE MANUFACTURER PUT ON THE TIMELY QUALITY CERTIFICATES.