OFITE Model 120-700 High-Temperature High-Pressure Corrosion Testing System

Overview

The OFITE Model 120-700 High-Temperature High-Pressure Corrosion Testing System is an engineered laboratory platform designed to quantify material degradation under simulated downhole or process-industrial conditions. It operates on the principle of gravimetric corrosion rate determination—measuring mass loss of standardized metal coupons exposed to aggressive chemical environments (e.g., acidic brines, CO₂/H₂S-saturated fluids, inhibitor formulations) at elevated thermobaric states. The system integrates a robust pressure vessel with internal agitation, precision thermal control, and fail-safe mechanical protection, enabling reproducible evaluation of corrosion resistance in accordance with ASTM G31, NACE TM0169, ISO 15156, and API RP 14E protocols. Its operational envelope—up to 34.5 MPa (5,000 psi) and 204.4 °C (400 °F)—covers critical ranges for oilfield production systems, geothermal fluid handling, and high-pressure chemical processing equipment qualification.

Key Features

• Four-position sample configuration with independent 150 mL borosilicate glass reaction vessels, ensuring parallel testing under identical thermodynamic conditions
• Internally mounted variable-speed motor-driven agitator (0–100 rpm) providing controlled hydrodynamic shear to replicate flow-assisted corrosion (FAC) mechanisms
• Digital microprocessor-based temperature controller with ±0.5 °C accuracy and programmable ramp/soak profiles for thermal stability validation
• Integrated water-circulation cooling circuit enabling rapid post-test cooldown—reducing cycle time without compromising pressure integrity
• Full-system safety architecture: ASME-certified pressure vessel, redundant pressure relief valve set at 110% MAWP, real-time overpressure/overtemperature alarm with audible and visual indicators
• All wetted components—including vessel liner, sample holders, valves, and seals—constructed from corrosion-resistant alloys (e.g., Hastelloy C-276, Inconel 625) and fluoropolymer-lined hardware

Sample Compatibility & Compliance

The system accommodates standard ASTM G1–G106-compliant corrosion coupons (e.g., carbon steel A106, stainless steels 316/410, duplex alloys, nickel-based superalloys) as well as custom geometries up to 76 mm × 12.7 mm × 3.2 mm. Glass vessels permit optical monitoring of precipitate formation, emulsion stability, and inhibitor film adherence during exposure. Designed for compliance with NACE MR0175/ISO 15156 for sour service qualification and aligned with API RP 14E for erosion-corrosion modeling, the instrument supports GLP-compliant documentation workflows when paired with validated electronic lab notebooks. All pressure boundary components meet ASME Boiler and Pressure Vessel Code Section VIII, Division 1 requirements.

Software & Data Management

While the Model 120-700 operates via standalone hardware controls, it is fully compatible with external data acquisition systems (e.g., LabVIEW, MATLAB, or custom SCADA interfaces) via analog 4–20 mA and RS-485 Modbus RTU outputs for temperature, pressure, and agitation speed. Optional digital logging modules provide timestamped CSV export of real-time process variables, supporting 21 CFR Part 11-compliant audit trails when deployed in regulated QA/QC environments. Raw gravimetric data—pre- and post-test coupon weights, surface area measurements, exposure duration—are processed using industry-standard corrosion rate calculators per ASTM G102, yielding results in mm/year (mpy) or milli-inches per year.

Applications

• Evaluation of corrosion inhibitor performance in HPHT oilfield brines containing H₂S, CO₂, organic acids, and chloride
• Qualification of metallurgical candidates for subsea manifolds, tubing strings, and flowlines under sour service conditions
• Accelerated aging studies of elastomeric seals and polymer linings in aggressive chemical media
• Research into synergistic effects of temperature, pressure, pH, and flow velocity on localized corrosion (pitting, crevice, stress corrosion cracking)
• Supporting materials selection for carbon capture utilization and storage (CCUS) infrastructure exposed to supercritical CO₂–brine mixtures

FAQ

What standards does the OFITE 120-700 comply with for corrosion testing?
It supports execution of ASTM G31, NACE TM0169, ISO 9223, and API RP 14E methodologies; pressure containment meets ASME BPVC Section VIII, Div. 1.
Can the system operate continuously for extended durations (e.g., 30+ days)?
Yes—designed for unattended operation with stable thermal regulation and redundant safety cutoffs; typical long-term tests range from 72 hours to 30 days based on experimental protocol.
Is third-party calibration certification available?
OFITE provides factory calibration certificates traceable to NIST standards for temperature and pressure transducers; field recalibration services are offered through authorized service centers.
What utilities must be connected prior to commissioning?
Required utilities include: 230 V / 25 A / 50–60 Hz power supply, cooling water at 40 PSI (with drain access), and clean, oil-free compressed air or nitrogen at 100–120 PSI for pneumatic valve actuation.
Are replacement parts and consumables readily available?
All critical spares—including glass vessels, O-rings (FKM/FFKM), pressure transducers, and agitator shaft seals—are stocked globally by OFITE and its authorized distribution network with lead times under 10 business days.