At customer’s request, we supply pipes with external three- and two-layer аnti-corrosive coating and internal flowor аnti-corrosive coating. Pipes are certified by American Petroleum Institute according to API Spec 5L (License No. 5L-0276) ISO and according to Shell requirements.
In 2007 a compliance certificate was issued for VSW products according to Det Norske Veritas requirements, DNV-OS-F101 standard
for offshore pipeline systems. This allowed OMK to win an international tender for supply of 280 thousand tons of pipes with diameter of 1220 mm (48”) and wall thickness 30.9, 34.6 and 41.0 mm (1.2”, 1.4”, 1.6”) in 2008-2009 to construct an offshore section of the Nord Stream gas pipeline on the Baltic Sea bed. Currently VSW has won a tender for supply of 440 thousand tons of pipes with diameter of 813 mm (32”) and wall thickness 39 mm for an offshore section of the South Stream Project (1,2 lines) gas pipeline on the Black Sea bed, and has already started deliveries.
Basic Equipment
Large Diameter Pipes are produced on two separate lines using different production methods – UOE Line and JCO Line. Pipes can be made with either one or two longitudinal welds.
UOE Line
Produces pipes with diameter of 508 – 1067 mm (20-42”) and wall thickness from 8 to 32 mm (0.28-1.26”), strength grade Х80. Design capacity is 1012 thousand tons of pipes per year.
JCO Line
Produces pipes with diameter of 508 – 1422 mm (20-56”) and wall thickness from 8 to 48 mm (0.28-1.89”), strength grade up to Х100, and working pressure up to 24.7 MPa (250 atm.). Design capacity is 950 thousand tons of pipes per year.
Product range and scope of application:
| Standard | Outside dia., inches (mm) |
Wall thickness, mm | Steel grade | Scope of application |
| ISO 3183 | 20” (508) – 56” (1422) |
8.0 – 48.0 | Strenght class Gr.В – X100 Steel L245 – L555 |
For construction of gas and oil pipelines, water transportation systems both in oil and gas industry |
| DNV-OS-F101 | 20” (508) – 56” (1422) |
8.0 – 48.0 | Steel L245 – L555 | Subsea pipe systems used in the oil and gas sector |
| DIN 10217 | 20” (508) – 56” (1422) |
8.0 – 40.0 | Steel P235 – P265 | Multi-purpose pipes |
| DIN 10219 | 20” (508) – 56” (1422) |
8.0 – 40.0 | Steel S235 – S460 | Multi-purpose pipes |
Production of large diameter SAWL pipes
— Longitudinal electric-welded large diameter pipes are manufactured by submerged arc welding (SAW).
— At present large diameter pipes can be manufactured by two independent lines having different pipe forming processes: UOE and JCO.
