Model 6400
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HYDROGEN PROBES Model 6400 Simple Reliable Method Meets NACE MR0175 and MR0103 Intrusive and Non-Intrusive Models No Chemicals or Shelf Life Problems Atomic hydrogen (H+), generated by the cathodic corrosion reaction can lead to two types of failures in steels; Hydrogen Blistering and Hydrogen Induced Cracking (HIC). Part of the hydrogen produced by the cathodic corrosion reaction may permeate the steel by diffusion, and the balance is dissolved in the process electrolyte or released as bubbles of gas. Poisoning agents in the process, such as hydrogen sulfide, cyanide, and arsenic, inhibit the formation of molecular hydrogen on the metal surface and therefore increase the proportion

HYDROGEN BLISTERING Atomic (or nascent) hydrogen (H+), is small enough to permeate steel. At any cracks or inclusions in the pipes or vessels, the permeating atomic hydrogen combines to form hydrogen gas (H2) which is then too large to diffuse any further through the steel. The accumulation of hydrogen gas in these interstitial spaces results in an ever growing gas pressure causing a deformation known as blistering. The effects of blistering can be sufficient to rupture steel several inches thick. This phenomena occurs ...

MODEL 6400 HYDROGEN INSERT PROBE Intrusive monitoring element which uses Cosasco Two Inch System Access Fitting. Benefits • Thin wall sensing element allows for quicker response times. • Rated for pressures up to 6000 PSI • Removable under system pressure. • Internal temperature gauge allows compensation for temperature variations. Limitations • Requires service valve and retriever if not already available Spares P/N Bleed Cross Assembly 127130 Pressure Gauge 0 ‐100 psi 201924 Temperature Gauge 200746 Vent Valve 202008 O‐Ring Seals 124603 ...

MODEL 6402 FIXED HYDROGEN PROBE Intrusive monitoring element requiring 3/4" or 1" NPT fixed access. Benefits • Low cost. • Thin wall sensing element allows for quicker response times. Limitations • No compensation for temperature variations. • Cannot be removed under system pressure. Spares P/N Pressure Gauge (0‐100 PSI) 201924 Vent Valve 202008 MODEL 6403 RETRACTABLE HYDROGEN INSERT PROBE Intrusive monitoring element which requires a minimum of 1" full port valve and NPT mounting nipple for access. Benefits ...