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Classification of the quality of large-diameter longitudinally welded steel pipes
The application of large-diameter longitudinally welded steel pipes has become very common in people’s lives, so do you know what grades the quality of large-diameter longitudinally welded steel pipes can be divided into? The following will introduce the specific content to you. Generally, ...Read more -
The reasons for the leakage of hot-dip galvanizing of seamless steel pipes
Causes and solutions for leakage of hot-dip galvanizing of seamless steel pipes: 1. The surface of the plated parts is not clean (1) The surface of the plated parts contains paint, grease, and soldering iron; it can be polished or scrubbed with relevant solvents. ⑵ iron oxide; under pickling; con...Read more -
Two cloth three oil anti-corrosion steel pipe technology introduction
The two-cloth three-oil anti-corrosion steel pipe can be used as the anti-corrosion paint for the outer wall of seawater or freshwater pipelines, the outer wall of underground oil pipelines, the outer wall of thermal pipelines, and the anti-corrosion finish paint of sluices. In painting, it is us...Read more -
Eddy’s current non-destructive testing method for the weld seam of spiral welded pipe
As an efficient special means of transportation, pipeline transportation has played an increasingly important role in the fields of oil and natural gas transportation. At present, domestic large-diameter transportation pipelines are mainly constructed with spiral-welded steel pipes. To ensure the...Read more -
What is the difference between the surface processing of spiral steel pipe and stainless steel pipe
The original surface of the stainless steel tube: NO.1 The surface that is subjected to heat treatment and pickling treatment after hot rolling. Generally used for cold-rolled materials, industrial tanks, chemical industry equipment, etc., the thickness is thicker from 2.0MM-8.0MM. Dull surface: ...Read more -
The problem of uneven thickness of the anti-corrosion coating of the spiral steel pipe and the treatment method
Spiral steel pipes are mainly used as fluid pipes and piling pipes. After the steel pipes are made, if they are used for running water, they will generally be treated with anti-corrosion on the inner or outer surface. The general anti-corrosion includes 3pe anti-corrosion, epoxy coal tar anti-cor...Read more