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Full scale Testing
Through the Full-Scale-Test Laboratory Centro Sviluppo Materiali S.p.A. has opened a specialized window on the world of OCTG products development and characterization. Based on “premium connection” and “ pipelines and ducts” sections, the lab is involved in the On- and Off-shore technology business, representing a very specialized and unique testing supplier for steel tubular products manufacturers and end-user Oil&Gas companies. Premium Connection Section This section is endowed with the following testing apparata: - one bucking unit, equipped with a dedicated data acquisition PC, and designed to handle joints with a diameter range between 2 3/8” and 14” and exerting a maximum torque of 68kN*m (50000lb*ft). It is addressed to submit ”Premium Joints” for:
- the characterization and qualification in terms of galling resistance through repeated Make-up and Break-out cycles;
- Over-torque tests;
- Torque-to-yield tests.
- one combined loads facility developed to submit “Premium Joints” to:
- sealability tests with combined loads (i.e., tension, compression, internal pression, external pression, bending);
- failure tests.
Apart from the data acquisition Hardware and Software, this equipment taylored to manage Lmax = 2000 mm and fmax = 356mm (14”) specimen, has the following characteristics:
- Maximum tension 13 MN applied force;
- Maximum compression 10 MN applied force;
and is furtherly supported by:
- two bending systems with two levels of maximum applied load (respectively, 70kN*m e 300kN*m applied torque;
- one torsion system with a capaciity of maximum 50kN*m;
- four pressure intensifiers (two for gas and two for liquids) able to exert a 2500 bar maximum pressure;
- one thermal cycling system designed to check the “Premium Joints” sealability behaviour during thermal cycling coupled with combined tension and internal pressure.
This equipment can submit the specimen to a temperature variation through a coupled induction coil and forced air/water spray nozzle for a temperature cycling between 250°C and room temperature.
- One fatigue equipment set to carry out tests by combining tension and internal pressure loads, with plain bending exerted at low frequency (5 Hz), at a maximum applied torque of 50kN*m.
The section is also equipped with: - external pressure vessels with max pressure of 2000 bar;
- a multiple specimens (up to 6) oven for 2 3/8” to 14” wide items with a maximum operating temperature of 350 °C;
- two single specimen ovens with diameters from 2 3/8” to 10 3/4” and a max temperature of 500 °C.
Pipelines and ducts sections This section of the Full Scale Testing Laboratory (FST Lab), equipped with ad hoc facilities for testing base plates, pipes, welded joints, tubular connections, etc., is able to reproduce the whole spectrum of in-field service conditions (high pressure, low temperature, fatigue, combined loading, dynamic impact, etc.). This section capability is operated at the following different sites: - Rome, where the following tests are performed:
- Full scale external damage testing on pressurised linepipes (up to 52” OD);
- Full scale traction/bending tests on defected wide plates/pipes and welded joints at low temperature (up to 4000 tons);
- Full scale fatigue tests on pressurised pipes (up to 2000 bar);
- Hydraulic tests until failure on defective/sound steel pipes;
- Dynamic Drop Weight Tear Testing (DWTT);
- Strain gauges measurements;
- Three dimensional measurements (1/100 µm accuracy);
- High speed camera test monitoring (2000 photos/s);
- X-Ray diffraction analysis.
- Nettuno, (RM), where the following tests are performed:
- West Jefferson testing carried out at temperature down to -50°C.
- Perdasdefogu, Sardinia, where the following test is performed:
- Full scale ductile fracture propagation burst testing in both onshore and offshore (sea water depth ≈30m) conditions (test line up to 147 m) on a loop designed to simulate the service conditions of high steel grade, large OD gas transmission lines (up to 56” OD);
- Capoterra, Sardinia, where the following test is performed:
- 250 ton multi-axial loading pipe testing.
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