Description

Corrosion Coupons for Pipeline Corrosion Monitoring

The EMT corrosion coupon gives pipeline and vessel operators a direct, proven method to monitor internal corrosion. Coupon corrosion measurement works by exposing a pre-weighed metal coupon to the process medium over a defined period, then calculating mass loss to determine average corrosion rate. Whether you operate oil, gas, or multiphase pipelines, this system delivers reliable corrosion data with minimal operational disruption. EMT designs and manufactures each access fitting, plug assembly, and coupon holder to ANSI and API standards. Decades of field service in upstream and midstream environments back every component we build.

What Are Corrosion Coupons?

Corrosion coupons are precision-machined metal specimens inserted into pipelines and process equipment to measure corrosion rates over time. Manufactured from the same material as the pipeline, they provide accurate, cost-effective data for corrosion monitoring programs in oil and gas, petrochemical and water treatment applications.Meanwhile,based on the weight loss of the corrosion test coupons, calculating the corrosion rate and determining the service life of the pipeline is also one of the most common and cost-effective methods.

Components Of The Corrosion Coupon

Without routine corrosion monitoring, pipeline operators face serious risks. Undetected wall thinning can lead to pinhole leaks or full-burst failures in high-pressure lines. Sour service environments accelerate H₂S-induced cracking when corrosion rates go unchecked. In water injection systems, untreated internal corrosion shortens flowline life and drives up replacement costs. Failed pipelines also create environmental spills and costly production shutdowns.EMT manufactures the corrosion coupon system as part of a broader pipeline integrity product family that includes chemical injection quills and chemical samplers. All components share the same access fitting interface, so operators can switch functions on the same installed base without additional welding.

Parameter	Strip Coupon	Multihole Strip	Disc Coupon
Imperial Size	3″ × 3/4″ × 1/16″	3″ × 1/2″ × 1/16″	Φ1.25″ × 1/16″
Metric Size	76.2 × 19 × 3.2 mm	76.2 × 19 × 3.2 mm	Φ31.8 × 3.2 mm
Mounting Holes	2	2	1
Typical Use	General monitoring	Narrow port access	Multi-disc stacking
Surface Finish	Mill / Glass Bead	Mill / Glass Bead	Mill / Glass Bead
Gasket Options	None / Nylon / PTFE	None / Nylon / PTFE	None / Nylon / PTFE

How Corrosion Coupons Work With Holders

Operators fix a pre-weighed coupon onto the corrosion coupon holder and insert the assembly through the access fitting into the pipeline. The coupon sits in direct contact with the flowing process medium — crude oil, natural gas, produced water, or multiphase mixtures — over a defined exposure period.

Once retrieved under live pressure, the coupon is removed from the corrosion coupon holder and sent to a laboratory for analysis. Technicians measure mass loss to calculate the average corrosion rate in millimeters per year (mm/y) or mils per year (mpy). Surface examination under magnification reveals pitting density and maximum pit depth, giving engineers the data needed to evaluate inhibitor performance and estimate remaining pipeline service life.

Disc-type coupons additionally support deposit and scale adhesion studies — collecting wax, scale, or microbiological deposits directly from the flow stream to set chemical treatment intervals and optimize pigging schedules. For this application, a corrosion coupon holder with adjustable insertion depth allows operators to position the disc coupon precisely within the flow profile for representative deposit sampling.

Key Features Of Corrosion Coupon

• Direct Installation: Insert corrosion coupons into live pipelines without shutdown.
• Material Flexibility: Available in CS, 316SS, 316LSS, Duplex SS, and Inconel.
• Deposit Monitoring: Disc-type supports wax, scale, and MIC collection studies.
• Adjustable Mounting: Secure coupons with multiple holder styles for various pipeline conditions.
• Compliance: NACE MR0175 and ASME-compliant for sour service environments.
• Custom Options: Holder dimensions and materials tailored to project specifications.
• Factory-Direct Supply: Competitive pricing, short lead times, and full traceability.

Application Scenarios Of Corrosion Coupon

Corrosion coupon are deployed across upstream, midstream and downstream pipeline operations:

• Corrosion inhibitor performance verification— quantify inhibitor efficiency across injection cycles and adjust dosing rates based on measured corrosion data
• Sour service and CO₂ corrosion monitoring— track H₂S and CO₂ corrosion rates in wet gas and multiphase lines operating under NACE MR0175 requirements
• Water injection pipeline surveillance— monitor internal corrosion in disposal and injection flowlines to extend asset life
• Deposit and fouling assessment— evaluate wax, scale, and MIC deposits to optimize chemical treatment intervals and pigging frequency

Why Choose Our Product

• B2B-Focused Manufacturing: EMT provides factory-direct supply, reducing costs and lead times for business customers.
• Integrated Pipeline Solutions: Coupons, holders, and access fittings come from a single manufacturer, simplifying procurement.
• Custom Engineering Support: Our team recommends the optimal coupon type, holder style, and material for your project.
• Certified Quality: ISO 9001-certified production ensures full material traceability, mill certificates, and third-party inspection reports.
• Global Project Experience: Supplying oil & gas operators across the Middle East, UAE, Europe, and North America.
• Responsive Technical Service: Every inquiry receives prompt engineering support and technical guidance within 24 hours.

  EMT Corrosion Coupons Installed on Oil & Gas Pipeline Monitoring Project

  

EMT manufactures corrosion coupon for oil and gas pipeline corrosion monitoring, supplying operators across the Middle East, UAE, Saudi Arabia and Qatar. Every system ships factory-direct with full material traceability and third-party inspection reports available upon request.
Beyond standard configurations, EMT provides corrosion coupon systems in fully customizable options — including corrosion coupons, corrosion coupon holders and corrosion monitoring access fittings in both flanged and welded connections. Whether you require a specific coupon material, mounting dimension, or access fitting specification, our engineering team reviews each inquiry individually and recommends the right combination of coupon type, holder style and fitting configuration for your exact operating conditions. Material selection guidance and installation technical support are included as standard.

To get started, contact us to request a quotation, discuss your project requirements, or arrange product samples.