Detecting Sigma Phase
· 2507 Duplex Stainless Steel Tube
· 80 FT Cut Lengths · 3/4″ OD with .083″ Wall Thickness · Detects Sigma Phase as Small as 2.6% of Tube Wall Cross Section · 2 Channel MultiMac® Eddy Current Tester- Offline · 2 Varimac® Comparator Coils |
System:
The test consists of a 2 channel MultiMac® coil eddy current tester. 1 channel is used for the detection of typical defects, while the other channel is used for finding sigma phase; a condition caused from improper or extensive heat treatment.The second channel on the MultiMac is an absolute tester using two Varimac® coils. One coil is balanced on air and used to calibrate the equipment with a reference standard.
The other is the actual test coil installed on a CP 30 (Coil Platform). The system is mounted on a Dual Pinch Stand test bench and is comprised of a CP 352 for defect detection, followed by CP 30 for sigma phase. This system operates offline on cut length of 2507 duplex stainless steel tubes up to 80 feet in length, 3/4” OD, with a wall thickness of 0.083”.
Coil Platform 352 on the left for defects followed by coil platform 30 towards the right for Sigm
a Phase. Above is the MultiMac Electronics.
API 5L line pipe seamless in various grades and sizes. OCTG pipe
BalasHapus