TPI July 2012

oi l & gas pipel ines

Production line testing of OCTG fromMAC

Magnetic Analysis Corp (MAC) has recently supplied several Rotoflux ® flux leakage inspection systems to major producers of oil country tubular goods. Designed tomeet the latest specifications in the oil and gas industry, including API 5CT and 5L, ASTM, and ISO, these transverse and longitudinal flux leakage systems can handle material from 76.2 to 406mm (3" to 16") diameter. Flux leakage technology is particularly applicable for inspection of heavy wall material, and MAC’s multiplex test probe systems allow operation at high throughput speeds. Using very high magnetising capabilities and selective filter circuits, transverse and longitudinal defects on the OD/ID such as rolling skins, laps, cracks, laminations and cavities as well as internal defects can be accurately detected.

separate channels from 24 test probes and allow each individual signal to be independently filtered, displayed and processed. For detecting transverse defects, multiples of 12 element probe arrays are individually mounted to rotate to provide 100 per cent coverage, based on the tube size. Especially important for many OCTG producers is the ability of the Rotoflux systems to handle tube with upset, irregular shaped ends, and tube with couplings. Specially designed test probe assemblies are automatically controlled to retract when the end of a tube with a coupling, upset or irregularly shaped end approaches the rotary test heads. To meet even more demanding specifications for OCTG, many producers are using a comprehensive inspection system that includes both the Rotoflux and MAC’s Echomac ® ultrasonic test systems. The Echomac systems include

The Model 750 Rotoflux flux leakage

MAC’s FD-4 electronics with up to 32 independent test channels, suitable for user configured flaw detection or thickness gauging for each channel, and the Echomac UT rotary to maintain higher throughput speeds. Current UT rotary models can handle material ranging from 6.35 to 360mm (¼" to 14"). Magnetic Analysis Corporation – USA info@mac-ndt.com www.mac-ndt.com

Electronics mounted in the longitudinal rotary test head provide up to 24

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July 2012 Tube Products International