Tubes used and stale 219; 273; 325; 377; 426; 530; 630; 720; 820; 920; 1020; 1220; 1420 mm

Tubes used and stale 219; 273; 325; 377; 426; 530; 630; 720; 820; 920; 1020; 1220; 1420 mm .

Carry out the cutting by gas welding.

The high price of metal became an indirect cause for the use of this type of metal as the pipe used, which is much below the new cost, and at the same time is often quite good.

Also used pipe divided according to the method of manufacture, rather it is applied to the b/a tube to say – at the seams, existing or not, with a steel pipe.

Longitudinally welded pipe is the steel pipe that has one longitudinal seam.

Spiral welded pipe – steel pipe obtained by welding sheet with special cutting, seam, pipe is brewed according to the way three-dimensional spiral, in the end on the finished pipe, it is possible to detect the welding seam, covering the entire surface of the pipe, in shape resembling a spiral.

Hot-rolled seamless pipe is steel pipe that is received in a rolling mill from reheated to the desired temperature of the metal, has no seams, has a durable steel features, even the b/u solid pipe is much stronger than their welded counterparts. Seamless pipe, cold-formed – steel pipe received on a special rolling mill from cold metal. There is also garcina pipe – steel pipe, called from manufacturer – pipe having a cross seam in the middle of the pipe, i.e. the pipe is welded from two pieces of welded pipe.
 
The pipe used under gas
Pipe from under gas clean enough on the inside and insulated on the outside. The most common insulation film, but sometimes bitumen. The surface quality of the pipe metal under plastic insulation is better. The construction of gas pipelines use high-quality steel and have high requirements for the protection of pipes from external corrosion, therefore, the external surface of the pipe is usually free of defects. But the inner surface, because of the failure of cathodic protection and damaged insulation, frequent local damage. Pipe from under gas has the greatest scope among the pipes used — it is used for the construction of various pipelines for technical purposes, chimneys, tubular piles in the construction of hydraulic engineering structures (berths, piers, pontoons).

Water
Pipe from under the water, usually in the bitumen insulation. Due to the lack of protection against electrical corrosion under external insulation usually found pockets of corrosion until the end-to-end. The inner surface has significant damage from corrosion (shell).

Couples
Pipe heating systems and hot water

Stale tube
Stale pipe is a pipe with storage. This means that the pipe has not been used and is not mechanically processed.