CorrView ® is a versatile maintenance tool capable of providing varying forms of corrosion related information depending upon its planned use and physical placement. Given that both the suspected corrosion rate of the piping system and the wear dimension of its forward surface will determine its ultimate service life, some preliminary thought is often necessary to determine whether long term or short term monitoring is desired. There are advantages to both options.

     One important factor to consider is that different corrosion scenarios will exist for pipes or tanks depending upon their age. Therefore, the longer CorrView ® remains installed in the system, the more it will be subject to the long term effects always present, and often the most damaging effects of under deposit corrosion. At the same time, extended use will not provide the immediate corrosion information generally necessary for monitoring a water treatment program, and supplemental testing through the use of ultrasound or corrosion coupons is always recommended.


     Installing CorrView ® with a higher wear dimension, provides more of a cumulative evaluation of system corrosion activity, and will better show the result of any pitting that may develop underneath deposits which have settled over a period of years.

     A higher wear dimension is also more suitable where the maximum acceptable wall loss limit has already been designated, and where an alert that it has reached that point is all that is desired. Such might exist in a domestic water or fresh water line - where no chemical treatment or preventative measures can be employed.

     Obviously, a higher wear dimension provides less advance notice that a corrosion problem exists. And for that reason, we recommend continuing the use of other more immediate testing methods such as ultrasound, LPR, or corrosion coupons.

     CorrView ® is ideally suited for new piping installations - where it would need to sustain the first few weeks or months of higher corrosion activity which typically exists. Also, initiating a long term monitoring plan during the construction of a building property or process plant would provide future operators, many of whom might not be committed to monitoring their piping condition, a wake-up call to a corrosion problem years later. CorrView ®, installed at the time a piping system is first placed on-line, begins an independent corrosion monitoring program that future owners and operators will benefit from greatly.



     CorrView ® is available having four standard wear dimensions - 0.035 in. or 0.89 mm, 0.050 in. or 1.27 mm, 0.100 in. or 2.54 mm, and 0.150 in. or 3.81 mm. The intermediate standard dimension of 0.050 in. provides an acceptable alert in most applications - especially where larger diameter and heavier pipe is used. For any typical large building or plant condenser water system, showing an alert after a wall loss of 0.050 in. would still leave substantial pipe thickness remaining.

     Where corrosion activity is low, such as for a chemically treated closed chill water system, the smaller wear dimension of 0.035 in. would actually provide long term coverage, and likely offer a better testing option.

     Standard wear dimensions are stock items and are generally available for immediate shipping. CorrView ®, however, can be supplied with any wear dimension or special configuration at client request.


     Deposits are, in fact, a fundamental cause leading to most serious corrosion problems. A 5 MPY corrosion rate against 1,000 ft. of 12 in. pipe can actually produce thousands of pounds of deposits after one or two decades of operation. View a photo gallery of interior deposit problems.

     Choosing a lower wear dimension of 0.035 in. or 0.050 in. provides more advanced notification of a corrosion problem - which might be desired by many plant operators. It may not, however, show the more damaging effects of long term deposit buildup, and the under deposit pitting which often develops after many years of service.

     The lowest 0.035 in. wear dimension would be more appropriate for closed piping systems having inherently lower corrosion activity. It might also be used in combination with 0.100 in. CorrView ® models in order to provide varying levels of notice.


     CorrView ® is available in stock configurations suitable for most cooling and process water applications. The features available in the stock models are listed below, as well as various options available on special order:


 Standard CorrView ® products are CNC machined from a solid block of ASTM 1018 metal - the equivalent to ASTM A53 grade B mild carbon steel. This provides a close similarity of wall loss to mild carbon steel piping commonly used in HVAC and process piping systems. View corrosion testing reports

Options - CorrView ® can be machined from any metal alloy - from copper to stainless steel and others. CVI offers full machine shop services, and our only limitation is the availability of the material itself in some bar stock form.

CVI can also provide an ASTM accelerated corrosion analysis for any specified alloy against actual client supplied piping samples to provide a true corrosion rate reference.



Four standard wall thicknesses or wear dimensions are available of 0.035 in. or 0.89 mm, 0.050 in. or 1.27 mm, 0.100 in. or 2.54 mm, and 0.150 in. or 3.81 mm. This defines the amount of wall loss tolerable before a warning indication takes place.

Options - CorrView ® can be machined to any client specified wear thickness.



We offer CorrView ® with a standard National Pipe Thread of 1-1/2 in. NPT, which should satisfy any testing requirement. Smaller 3/4 in. and 1 in. NPT models are planned.

Options - CorrView ® can be machined having any thread size or dimension. This includes Metric sizes, British Pipe Thread, and AWWA.



CorrView ® is machined having either a flat front surface, or one extended further into the piping system. For most applications, the flat surface model will be quite suitable, and provide the necessary information by corroding similar to the pipe itself. Where CorrView ® is intended for installation behind a valve, the flat surface model is mandatory due to valve clearance requirements.

However, for applications where an interest exists to bring CorrView's ® wearable surface further into the moving liquid stream, the extended surface option may be specified.

Due to the many differences in piping thickness, threadolet height, or other threaded fitting configuration, etc., we offer this extended surface option in standard 1/2 in. length.

Options - CorrView ® can be machined to any client specified extended forward length.



CorrView ® produces its color change due to the presence of water or moisture within its sealed chamber. Regardless of the mechanism creating the wall loss, water or moisture must be the major component of the carrying liquid for standard models.

An oil or chemical pipe line, while it may corrode due to various reasons related to moisture, would not produce an indication from standard CorrView ® models due to oil or some other chemical entering its inner chamber.

Options - Depending upon the carrying liquid, CorrView's ® indicator can be modified to provide a notice of corrosion loss.



  CorrView ® has been designed and manufactured to provide pressure holding capacity well beyond any operating pressures found an a building or plant related cooling water, circulating, or fire sprinkler system. While it offers a 3,000 PSI pressure rating and 11,000 proof burst test, we still recommend a lower operating limit of 400 PSI simply due to the effect of pressure against a thin forward metal wall dimension. View a pressure test report.

As corrosion wears against the front surface, it will physically weaken it to the point where pressure alone will ultimately cause its failure and an indication at the sight glass.

Since corrosion activity typically produces random deep pitting into a metal surface rather than uniformly removing its metal, such deep but small penetration are not subject to producing a failure of the wear surface at moderate pressures of 400 PSI below, and therefore allow full exposure of the wear surface chosen.

Options - For high pressure applications, the forward wear dimension of CorrView ® can be modified having a heavier base dimension of 0.200 in. and multiple smaller penetrations made into that surface to provide the desired wear dimension.

In such a configuration, the much smaller diameter holes, having far less cross sectional area, are capable of handling far greater pressures while still allowing passage of water or moisture to the interior.



  The outer body of CorrView ® is protected from light moisture and general corrosion by the application of a heavy duty black nickle chromate industrial finish. For most typical commercial or industrial indoor environments, this will provide excellent service.

Options - For chill or cold water applications where constant moisture can be expected, or where CorrView ® will be installed in corrosive environments, various more corrosion resistant coatings are available.



  One of the objectives of CorrView ® is to provide a simple and easily implemented monitoring tool. A visual indication of a color change from white to bright fluorescent orange achieves that goal in virtually all intended applications.

Options - CorrView ® will soon be available having an internal moisture or water sensor, rather than a visual color change indication of wall loss. This will provide a closed or open electrical contact for computer or building automation systems.




     Additional options will become available as applications for CorrView ® increase, and be listed on our Product Options Page as they appear. All OEM and custom inquiries are welcome.


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