Black annealed pipe is a type of annealed thin-walled steel pipe with an unglazed surface that appears black in color.During the manufacturing process, this steel tube undergoes a specific annealing treatment to soften its physical properties for further processing and welding.

Black annealed pipe is a type of annealed thin-walled steel pipe with an unglazed surface that appears black in color.During the manufacturing process, this steel tube undergoes a specific annealing treatment to soften its physical properties for further processing and welding.

Black annealed pipe is a type of annealed thin-walled steel pipe with an unglazed surface that appears black in color.During the manufacturing process, this steel tube undergoes a specific annealing treatment to soften its physical properties for further processing and welding.

Black annealed pipe is a type of annealed thin-walled steel pipe with an unglazed surface that appears black in color.During the manufacturing process, this steel tube undergoes a specific annealing treatment to soften its physical properties for further processing and welding.

Q355 Spiral steel pipe is made of strip steel coil as raw material, regular temperature extrusion molding, automatic double wire double-sided submerged arc welding process welded spiral seam steel pipe. Spiral steel pipe will be fed into the welded pipe unit, through the multi-channel roll rolling, the strip steel is gradually rolled up to form a round billet with an open gap, adjust the amount of extrusion rollers under pressure, so that the weld gap is controlled at 1~3mm, and make the weld ends flush.

Q235 Spiral steel pipe is made of strip steel coil as raw material, regular temperature extrusion molding, automatic double wire double-sided submerged arc welding process welded spiral seam steel pipe. Spiral steel pipe will be fed into the welded pipe unit, through the multi-channel roll rolling, the strip steel is gradually rolled up to form a round billet with an open gap, adjust the amount of extrusion rollers under pressure, so that the weld gap is controlled at 1~3mm, and make the weld ends flush.

Q195 Spiral steel pipe is made of strip steel coil as raw material, regular temperature extrusion molding, automatic double wire double-sided submerged arc welding process welded spiral seam steel pipe. Spiral steel pipe will be fed into the welded pipe unit, through the multi-channel roll rolling, the strip steel is gradually rolled up to form a round billet with an open gap, adjust the amount of extrusion rollers under pressure, so that the weld gap is controlled at 1~3mm, and make the weld ends flush.

SS400 Spiral steel pipe is made of strip steel coil as raw material, regular temperature extrusion molding, automatic double wire double-sided submerged arc welding process welded spiral seam steel pipe. Spiral steel pipe will be fed into the welded pipe unit, through the multi-channel roll rolling, the strip steel is gradually rolled up to form a round billet with an open gap, adjust the amount of extrusion rollers under pressure, so that the weld gap is controlled at 1~3mm, and make the weld ends flush.

A36 Spiral steel pipe is made of strip steel coil as raw material, regular temperature extrusion molding, automatic double wire double-sided submerged arc welding process welded spiral seam steel pipe. Spiral steel pipe will be fed into the welded pipe unit, through the multi-channel roll rolling, the strip steel is gradually rolled up to form a round billet with an open gap, adjust the amount of extrusion rollers under pressure, so that the weld gap is controlled at 1~3mm, and make the weld ends flush.