Problem: Predominantly heat exchanger tubes are manufactured from a different metal than the tube sheet. This leads to bi-metallic corrosion at the junction of tube and tube sheet which in turn causes leakage across the tube sheet.
Belzona Solution: Because Belzona products are electrically non-conductive they can be used to isolate the two differing metals from the electrolyte thus breaking the electrical connection and thereby eliminating the galvanic corrosion.
Rebuild division bars and seal faces
Re-form division bar seats.
Rebuild covers and water boxes.
Problem: When division bars and their seats (seal area) are damage by corrosion the result is short circuiting of the fluid media between passes. This of course drastically reduces the efficiency of the heat exchanger.
Protect water boxes and end covers against corrosion
Problem: Corrosion build up within water boxes can lead to reduced flow, and turbulent flow of the fluid passing through. This in turn will lead to increased erosion and also reduce the efficiency of the heat exchanger.
Belzona Solution: By applying a Belzona protective coating the corrosion can be eliminated. If the corrosion is eliminated the consequences of the corrosion are also eliminated. Various coatings are available which are designed to cope with a range of service conditions.
Repair existing linings.
Repair and seal holed casings.
Seal leaking tubes.
Seal leaks at flanged joints.
COOLING TOWERS
Rebuild expansion joint edges
Seal cracks and expansion joints
Problem: Expansion and contraction, natural movement of the ground, freeze-thaw cycles and impact all combine to cause the premature failure of expansion joints. This in the main is due to two primary reasons. The concrete used is not very strong and the sealing compound used is not elastic enough.
Belzona Solution: Belzona Know-How,available from your local Belzona Technical Consultant will guide you through the process of rebuilding and sealing the joint. Belzona products are specially designed to give a long term repair by resisting the forces that would otherwise cause breakdown of the joint.
Rebuild fan blades
Problem: In almost every case, where dust particles pass through a fan at high velocity the leading edges of the fan blades are damaged by erosion. This can lead to turbulence which in turn leads to increased erosion damage. It also causes imbalance of the fan which results in damage to the bearings and shafting.
Belzona Solution: Rebuild and protect the leading edges of fan blading with the Belzona 1300 Series Polymers, which are erosion-resistant ceramic polymers which are specifically designed to resist erosion caused by small particulates which become entrained within a fluid.
Belzona Know-How also extends to:
Rebuild damaged concrete.
Seal and protect porous surfaces.
Rebuild damaged lattice work.
Repair fan shafts.
Protect pipe- and steel- work against corrosion.
Rebuild and protect wooden pans.
Repair damaged/corroded metal pans.
Protect metal pans against corrosion/chemical attack.
Reduce algae/bacterial growth build up.
REFRIGERATION EQUIPMENT
Reduce condensation effects
Protect insulation.
Seal pipe leaks.
Problem: If condensation occurs beneath pipe work insulation accelerated corrosion occurs, known as Corrosion Under Insulation or CUI, it is probably the most costly problem facing general industry worldwide.
Belzona Solution: Belzona 3000 Series Membranes are proven to stop the ingress of liquids into the insulation whilst allowing any moisture trapped within to dry out through the membrane. Once the insulation is dry and protected in this way then the corrosion problem is eliminated.
Protect piping and steel work against corrosion
Diagnosis: Corrosion caused by condensation on the surface of cold pipe work can cause dramatic thinning of wall thickness and reduce the efficiency of the system.
Belzona Solution: Belzona Corrosion resistant coatings can be applied to provide a barrier which is impervious to liquids and hence will eliminate the corrosion. Click on the HEX-12 link to find out more.
RADIATORS AND CALORIFIERS
Seal leaks, welds, and seams
Problem: Due to the methods of construction coupled with the fluids passing through them, radiators and calorifiers tend to spring leaks at key areas such as welded seams and other areas where the manufacturing process has induced stresses of some kind.
Belzona Solution: These leaks can in many cases be effectively and permanently sealed by the Belzona Polymers. In some cases it is even possible to seal the leak whilst the equipment is on line, thus preventing equipment shut down and lost production cost.
Protect against corrosion
Problem: Since radiators and calorifiers are usually handling hot oxygenated liquids internal corrosion is a constant problem.
Belzona Solution: Belzona 1000 and 5000 Series corrosion resistant coatings have proved time and again over the years that they have the ability to minimize and in some cases eliminate this corrosive attacks.
Rumford Industrial Group, Inc. 772 Congress Park Drive, Dayton, Ohio 45459
phone (800) 336-2827 (937) 435-4650 | fax (937) 435-3242 | email
Rebuild and protect eroded-corroded tube sheets
Rebuild division bars and seal faces
Protect water boxes and end covers against corrosion
Rebuild expansion joint edges
Rebuild fan blades
Belzona Know-How also extends to:
Reduce condensation effects
Protect piping and steel work against corrosion
Seal leaks, welds, and seams
Protect against corrosion