Longitudinally welded large-diameter pipes are produced by 3 Roll-Bending – (Expanding) Process at

Volzhsky Pipe Plant.

Size: OD 20” – 56”. Steel grades: up to X100. Production capacity is 650 000 tonnes per year.

LSAW pipes are made according to API Spec 5L. Quality Management Systems is certified acc. to ISO

3183:2007.

Mill manufacturer – HAEUSLER.

Line pipes are manufactured using our own steel that has been treated with synthetic slag in ladle-furnaces.

The applied steel making process not only ensures chemically pure steel with low sulphur and phosphorus

contents (sulphur 0.002-0.005%, phosphorus 0.007-0.008%), but also allows to improve corrosion resistance

and superior mechanical properties.

The pipes are inspected for internal and external defects using automated electromagnetic and ultrasonic

inspection equipment. Pipe ends undergo magnetic-fluoroscopic detection after beveling.

If the wall thickness exceeds 16mm, ends are usually double beveled.

The pipes are also subjected to tensile, flattening and hydrostatic testing.

Testing of corrosion-resistance properties can also be performed using the NACE MR 02-84 hydrogen induced

cracking method and the NACE MR 01-77 sulphide stress corrosion cracking method.

Surface protection

• Rust preventative water-based paint is applied on outside pipe surface to protect against normal atmospheric

corrosion during transportation and storage;

• 3-layer protective PE coating or FBE coating can be applied on the external surface of pipes with diameters

of 4 1/2” to 16” upon request.

• If required, pipes can be delivered with bevel protecting metal caps.

Pipes are automatically packed in bundles and tied with steel strips or wires, according to API loading and

transportation standards.