Corrosion Monitoring
Coupon Holders & Racks
Holders and racks that securely position corrosion coupons in the process flow for accurate, repeatable corrosion measurement.
Overview
Coupon holders insert through standard 2-inch access fittings to position corrosion coupons at the desired depth and orientation within a pipeline or vessel. HovoyPetro holders are available in single-coupon and multi-coupon rack configurations, with options for flush-mount, bypass, and retractable insertion.
Key Features
- Single-coupon and multi-coupon (up to 6 positions) rack designs
- Fits through standard 2-inch full-opening access fittings
- Adjustable insertion depth
- Insulated coupon option to prevent galvanic effects
- Retractable design for under-pressure retrieval
- All wetted parts: SS316 standard, exotic alloys on request
Technical Specifications
| Holder Types | Single coupon, multi-rack (2/4/6 position), flush mount, bypass |
| Insertion Diameter | 25.4 mm (1") standard through 2" access fitting |
| Material | SS316 standard. Hastelloy, Monel, Alloy 20 on request. |
| Max Pressure | Per access fitting rating — up to ANSI 1500# (260 bar) |
| Insulation | PTFE sleeve isolation available to prevent galvanic coupling |
Available Materials
Stainless Steel 316 / 316L
Hastelloy C276
Monel 400
PTFE insulation sleeves
Applicable Standards
- NACE SP0775
- Compatible with ASTM G4 test assemblies
Applications
- Pipeline corrosion monitoring
- Process vessel monitoring
- Water system monitoring
- Multi-point corrosion surveys
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