Knowledge

29May, 2025

Large-diameter welded pipe production units
Large-diameter straight seam submerged arc welded pipe (20-64 inches) production units use various methods. The UOE method offers the best quality but stopped new construction due
29May, 2025

Medium-diameter welded pipe production units (8-26 inches)
Today, cage roll forming dominates medium-diameter (8-26 inch) welded pipe production, with only a few exceptions using two-roll or FF forming. The leading global suppliers are DMS
29May, 2025

Development of Small-Diameter Welded Pipe Production Units
The forming methods for small-diameter welded pipe mills (units below 8 inches) have undergone multiple innovations. Early methods included the guide plate forming method and the t
26May, 2025

Development Process of Steel Pipe Forming Technology
From manual operation to automated production From standard pipes to customized precision forming From single-process to integrated intelligent manufacturing Continuous im
26May, 2025

Development History of China's Steel Pipe Industry
China's steel pipe industry has evolved from technology introduction to independent innovation and global dominance, supporting domestic infrastructure and export demand.
30Apr, 2025

Corrosion Behavior of Zinc Coatings in Seawater
Seawater typically contains 1-25% salinity, with an average value of 3.5% commonly used for calculations. It contains substantial concentrations of dissolved oxygen, nitrogen, and
30Apr, 2025

Corrosion Behavior of Zinc Coatings in Distilled Water
Distilled water, lacking the salts necessary to form protective films, exhibits significant corrosion potential toward zinc coatings. Its corrosiveness ranks second only to rainwat
30Apr, 2025

Corrosion Behavior of Zinc Coatings in Hot Water
In addition to serving as water supply pipelines, galvanized steel pipes are also used to transport warm water, boiling water, and steam. These media induce distinct corrosion mech
30Apr, 2025

Corrosion Behavior of Zinc Coatings in Cold Tap Water
Galvanized steel pipes for water gas supply (now referred to as "galvanized welded steel pipes for low-pressure fluid transport" under the new Chinese national standard G
30Apr, 2025

Corrosion of Zinc Coatings in Sulfur-Containing Industrial Atmospheres
In industrial cities with heavy flue gas emissions, the atmosphere contains significant concentrations of sulfur dioxide (SO₂) and solid particulates. These particulates consist of
29Apr, 2025

Corrosion of Zinc Coatings in Indoor Environments
Corrosion of Zinc Coatings in Indoor Environments Indoor corrosion of zinc coatings is significantly milder than outdoor corrosion (typically reduced by approximately 80%) due to t
29Apr, 2025

Corrosion of Zinc Coatings in Outdoor Environments
The corrosion behavior of zinc coatings in outdoor settings primarily depends on air composition, humidity, rainfall patterns, and other environmental factors. Outdoor atmospheres

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