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Galvanized Steel Surface Removal Technology
1. The cold rolling step: The surface state of the strip there are two main aspects of surface roughness and residues. 2. Surface roughness: Cold-rolled strip surface roughness control process involving many factors, by batch annealing the strip, have a certain surface roughness to reduce the eff...Read more -
Galvanized Steel Surface Defect Inspection Points
We see more hot dip galvanized steel craft on the market now, hot dip galvanized steel surfaces because of improper operation of the formation of surface defects, the need for strict process to produce better products. If the defect is due to the hot-dip galvanizing equipment dysfunctional or poo...Read more -
Over-temperature Boiler Tubes Knowledge
Boiler tubes cooled in the heating surface tubes running time count or deterioration of the operating environment, dry, in a short time so that a sudden increase in the temperature of the steel pipe, the temperature reaches above the rated temperature, a tensile strength of steel sharp decline in...Read more -
Cause Analysis of Straight Seam Steel Pipe Wrong Side
Straight seam steel pipe production, the wrong side have occurred, many influencing factors. In practice, often by a dry wrong side super differential leaving the steel pipe downgrade. Cause analysis thus produces the wrong side of straight pipe joints and prevention measures are necessary. 1, St...Read more -
Straight Seam Steel Billet Piercing
Straight seam steel billet piercing temperature varies according to the raw material strange strange. Thermal expansion pipe but mostly in 1200 ℃, when the carbon content and other alloying elements more temperature slightly lower. The second key is to try to reduce the heating operation scale qu...Read more -
Control of 304 Stainless Steel Thick-walled Tube Grain Size
304 stainless steel thick-walled tube parts to control grain size during heat treatment is necessary, its quality heat-treated 304 stainless steel thick-walled tube has a very important impact. Here’s how to control the size of its grain size Method Summary as follows. (1) Choose a reasonab...Read more -
304 Stainless Steel Seamless Pipe Wear
304 stainless steel seamless pipe wear phenomenon is very common, many reasons for this phenomenon have physico-chemical and mechanical aspects, mainly by the abrasive wear, adhesive wear (glued), fatigue wear (pitting) corrosion and wear. 304 stainless steel seamless pipe and wear almost all pro...Read more -
How to Weld for Large-diameter Welded Steel Pipe at Low Temperatures
Under cold conditions a low-carbon steel welding, the cooling rate of the welded joint, which has made cracking tendency to increase, especially in the first weld Heavy structures susceptible to cracking, it is necessary to take the following process steps: 1) Do not possible under conditions of ...Read more -
Derusting Work Process of Thick Wall Straight Seam Welded Pipe
To walled Longitudinal rust oil treatment, we must first understand the characteristics and type of anti-rust oil, as well as their respective roles. So when buying such products can not be thrown off balance, indirectly save time. 1. Quick-drying Its biggest advantage is that dry fast, hard shel...Read more -
Microstructure and Properties of Hot-rolled Seamless Steel Pipe
At present, domestic steel producers face enormous challenges seamless steel overcapacity, have to adjust product structure, eliminate backward production capacity and research and development of high-quality products. Experimental studies have shown: the implementation of control of the cooling ...Read more -
Passivation Process of Spiral Pipe
Since the thicker parts formed on the surface, dense and complex components of the scale, such parts pickling descaling relatively complicated. Such removal of loose oxide scale according to a pickling step of removing ash hung performed. 1, Loose scale: 2, Pickling operation: after loose scale, ...Read more -
Straight Seam Steel Pipe Processing Methods
1. Steel casting: Use forging hammer the reciprocating impact force or press pressure to the billet into a pressure change we desired shape and dimensions plus work approach. 2. Kneading: the steel metal placed in closed kneading Jane, applying pressure at one end of the metal is extruded from th...Read more