CorrView ® was invented with the primary intention of producing a more accurate corrosion rate assessment by allowing a test metal surface exposure to the same operating environment as the pipe itself. It is also intended as a backup safety monitor - in effect acting as a long term "liquid fuse" to signal when a predefined or tolerable amount of wall loss has taken place.

     While offering any property owner or plant operator a substantial number of benefits and advantages, CorrView ® may not be applicable nor appropriate to all corrosion monitoring needs. In some applications it may not provide the immediate or real time corrosion information necessary. In others, CorrView ® may not be suitable or adaptable to the piping layout, fluid contained, or operating environment.


     CorrView ® is an extremely adaptable testing device. Some important considerations, however, in selecting it as a corrosion monitoring method are:


 CorrView ® is primarily a long term monitoring device - this being defined depending upon its fixed wear dimension and the degree of corrosion existing in the system. It is not designed nor intended to provide monthly, quarterly, or even annual corrosion rate information.

Except under the most extreme corrosion conditions, CorrView ® will not produce a quick indication of corrosion activity. We therefore recommend corrosion coupons, electronic LPR monitoring, or repetitive ultrasonic wall thickness measurements for such needed short term results.

Recognizing the special limitations of the various testing methods is important in establishing an adequate and reliable corrosion testing program.



CorrView ® is not intended as a substitute for corrosion coupons, but rather as a new form of corrosion monitoring entirely. While serious limitations exist primarily due to their external location to the actual pipe, corrosion coupons do serve a valuable benefit and purpose to any corrosion monitoring program by providing short term indication of inhibitor chemical presence and effectiveness - and to a lesser degree, system corrosion activity.

CVI considers the only 100% truly accurate form of pipe on-line corrosion monitoring to be a repetitive measurement of the exact same physical location using ultrasound technology. Ultrasound is the only procedure able to document true metal loss as a result of all corrosive factors against the pipe.



The indicating mechanism of CorrView ® is triggered by the presence of water or moisture within its interior cavity. Moisture produces its bright and irreversible color change at the front sight glass. Therefore, it will not show an indication of corrosion caused failure in any piping system not containing water or moisture.

The current CorrView ® model is not recommend where some other corrosive agent other than water is acting against the metal surface - such as often exists within chemical process piping - oil and and crude processing, for example. Nor is it recommended where water is only a minor component of the piping fluid.

CorrView ® will be soon available with the ability to provide the same service for oil, gasoline, or other hydrocarbon service. The basic design of CorrView ® is infinitely adaptable to any process application, and for any fluid. CVI welcomes all inquiries into producing specialized configurations of the CorrView ® monitor.

Since the wearable surface degrades similarly to the pipe itself, CorrView ® will contribute negligibly to the volume of oxide within the system. Yet, for that same reason, CorrView ® is not recommended for food, drug, or hospital grade piping or other similar applications.



CorrView ® is suitable for constant operating temperatures of up to 250 ° F. We do not recommend the current model for steam systems at this time, nor for high temperature applications which will vary in temperature range.

A high pressure, high temperature model for steam and high temperature water applications is in design, and will be available soon.



Unlike corrosion coupon racks, which can be easily valved off- line for coupon replacement, CorrView ® requires access directly into the pipe itself.

CorrView ® can be inserted behind a valve to still provide a better assessment of corrosion activity. Ideally, however, threading CorrView ® directly into a weldolet or threadolet will allow it to experience the same corrosive effect as the system and thereby produce the most accurate result.

In many cases, existing threaded outlets will provide suitable test locations. Where special areas of concern exist, or where no threaded outlets are available, new threaded ports must be installed. Adding new weldolet fittings in those areas where monitoring is intended will therefore be a preliminary step for many piping applications.

This can usually be accomplished with some advance planning, as most circulating systems do offer annual or semi-annual shut downs for cleaning or regular maintenance. For those 24/7 piping systems serving critical functions, and which simply can never shut down, a physically extended model of CorrView ® combined with high pressure insertion valve will soon be available.

Adding threadolets to areas of a system which can be valved off - such as exists at take-off lines to individual pumps, tower cells, or chiller machines, is one easy alternative. The smaller 3/4 and 1 in. CorrView ® models are often suitable for temperature and pressure ports, and can eliminate the need for welding, although the 1-1/2 in. model provides more surface area to corrode and a larger visual indication.



We recommend a working pressure limit of 400 PSI for the CorrView ® monitor at this time. Actually, the fused quartz sight glass is itself rated at 3,000 PSI. While most applications will never approach such pressures, this high pressure rating of the glass simply provides that added margin of operating safety. High pressure hydraulic thread sealant and a secondary O-ring provides complete protection against a leak.

Introducing the monitor into a piping system which cannot be drained involves the need to add a wet tap into the piping, and then insert an extended insertion model of CorrView ® through a special injection valve - called a corporation stop.

An extended insertion model and corporation stop assembly will soon be available for such applications.

However, for applications where a drain down cannot be arranged to install CorrView ®, the 300 PSI pressure limitation of this corporation stop type insertion device may therefore restrict its use.


     Given the inherent limitations of other testing methods, we believe that CorrView ® offers a wide range of benefits and advantages to every building owner, plant operator, or water treatment professional. Review a summary of CorrView's ® advantages.

     Some advance consideration of the level of corrosion threat existing, as well as the functioning and application of the device itself are required, however, in order to ensure success and the appropriate corrosion monitoring coverage.


     New models of CorrView ® will be available in the coming months in order to accommodate various specialized corrosion monitoring needs. Areas that will be addressed are variations for high pressure/high temperature steam lines, oil, gasoline and hydrocarbon service, electrical indication, and a live pressure insertion model. CVI welcomes all requests to produce specialized modifications of CorrView ® for individual or OEM requirements. Contact CorrView International, LLC