Direct Current Potential Drop (DCPD) testing is a widely accepted method for measuring crack growth or conducting crack initiation testing by applying electrical current to a specimen and measuring electric potential across the crack plane. Test specimens and fixturing utilize pull-through rod systems allowing use in Autoclaves, Tempressure Vessels, or Ambient Condition Test Chambers to simulate corrosive field conditions in High Temperature High Pressure (HPHT) environments. DCPD Systems are often paired with supporting equipment such as HPHT Circulating Flow Loops or Hydrogen Test Enclosures.
DCPD Equipment is an addition integrated into our Load Frame Systems. Electrically isolated fixturing isolates test specimens to prevent interference in measurements while the wires are passed through isolated fittings that maintain high pressure, high temperature seals. The drive system is capable of performing cyclic testing at extension rates up to 3.5 mm/sec and fatigue frequencies. Each testing system has a built-in data acquisition system with an intuitive setup interface to easily prepare and monitor any test.
TEST METHOD
ASTM E647
PRECISE
MOST ACCURATE DCPD TESTING ON THE MARKET
CUSTOM TEST SOFTWARE
FINELY TUNED CUSTOM SOFTWARE TO OPERATE DCPD TESTS
Precision Readings for Determining Crack Growth
Capable of Measuring and Calculating Stress-Intensity Factors
PC Controlled Data Acquisition System
Corrosion Fatigue Load Frames
-Slow Strain Rate Testing – NACE TM 0198
-Constant Load Testing – NACE TM 0177
-High Pressure, High Temperature (HPHT) Stress Corrosion Cracking (SCC)
-Electrochemical Studies
-DCPD Testing – ASTM E647
-New Product Development/Testing
-Supercritical Steam
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