As a major basic material for the building materials industry, steel pipe in our domestic demand are very large, and this year, the export of spiral steel pipe is gradually occupying the market position, its industry development trend is fierce, so that people can not help but think: spiral steel pipe compared to ordinary steel pipe, its advantages in the end where it is reflected?
Let’s take a look at some basic introduction of spiral steel pipe.
The appearance of spiral steel pipe is generally painted black, with plastic caps on both ends of the pipe, fixed length. The main standard is api.
Steel pipe
Export spiral steel pipe main inspection steps
Raw material inspection – leveling inspection – butt welding inspection – forming inspection – internal welding inspection —External welding inspection —Pipe cutting inspection —Ultrasonic inspection —Bevel inspection —Outline dimension inspection —X-ray inspection —Hydrostatic test —Final inspection
Export spiral steel pipe main anti-corrosion and insulation treatment
Cement mortar anti-corrosion spiral pipe
Epoxy coal asphalt spiral pipe
Spiral steel pipe exports gradually occupy the market position
Single / double layer epoxy powder (FBE) anti-corrosion
IPN8710 polymer coating anti-corrosion spiral pipe
Prefabricated polyurethane foam spiral pipe
Steel pipe
Export spiral steel pipe welding process of these advantages, directly laid its market position
1. High production efficiency
This is because, on the one hand, the welding wire conductive length is shortened, the current and current density is increased, so the depth of the arc and wire fusion efficiency are greatly improved. (generally not open bevel single-sided melt depth of up to 20mm) On the other hand, because of the flux and slag insulation, the arc is basically no heat radiation loss, spatter is also less, although the heat loss for melting flux has increased, but the total thermal efficiency is still greatly increased.
2. High quality weld seam
Slag isolation air protection effect is good, welding parameters can be automatically adjusted to maintain stability, the welders do not require high technical level, stable composition of the weld, mechanical properties are relatively good.
3. Good labor conditions
In addition to reducing the labor intensity of manual welding operations, it has no arc radiation, which is the unique advantage of submerged arc welding
Export spiral steel pipe is suitable for oil, gas and water pipelines, water, gas, pipelines, oil refineries, chemical plants, sewage treatment plants.
It is believed that more and more people will choose spiral steel pipe, and the development of the industry will be more and more promising.