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Tanks and Chemical Containment Areas Repair / Maintenance
CONTAINMENT AREAS
REPAIR AND REBUILDING
- Repair damage to floors and retaining walls.
- Reslope to restore proper drainage of floors and pads.
- Rebuild pump and tank bases.
Problem: The major repair problem when concrete becomes damaged is the fact that new concrete generally will not successfully bond to old concrete. The result means that any repair done can not be classed as a permanent one and in some extreme cases must be renewed annually or at best at regular intervals.
Belzona Solution: The Belzona 4000 Series Magma Polymers are designed specifically to overcome the problems which arise with conventional repair techniques. Their “high build” capability, fast cure, high strength and chemical resistant properties make them the ideal choice for permanent repair to concrete surfaces.
Belzona Tanks and Chemical Containment Know-How for repair and building also extends to reseating drain covers and gratings. More detailed information is available from your local Belzona Technical Consultant.
COATINGS AND LININGS
- Bond and grout chemical resistant tiles in place.
- Coat containment areas to protect against chemical attack.
- Seal porous concrete.
- Repair existing linings.
Problem: When handling aggressive chemicals it is virtually impossible to prevent spillage of some kind. Whether these occurrences are caused by defective, or breakdown of, equipment accidental spillage or normal plant process it is vital to prevent pollution of the local environment. Of greater concern would be the pollution of an even wider area due to chemical contamination of ground water.
Belzona Solution: The wide variety of Belzona protective coatings are extremely versatile and are compatible with others in the product line, thus allowing the Belzona Technical Consultant to customize a solution to suit a particular problem or circumstance. The range allows for all eventualities from the need to simply seal a surface to providing medium-term chemical protection or even long-term chemical protection and impact resistance.
Problem: Although chemical resistant tiles are not affected by even the strongest of chemicals, they often fail to do their job because the grout between the tiles is not resistant to a particular chemical. Consequently the tile becomes disbonded and the chemicals then degrade the substrate and thus penetrate and pollute the ground beneath.
Belzona Solution: Belzona 4111 (Magma Quartz) can be mixed into a fluid-like consistency and used to grout tiled areas when chemicals are of average concentrations. For strong chemicals or where chemicals may be left for sometime Belzona 4311 (Magma CR1) will provide a grouting system which will provide a level of resistance to even highly concentrated chemicals.
JOINTS AND CRACKS
- Rebuild damaged expansion joint edges.
- Seal expansion/construction joints.
Problem: Expansion joints usually fail by two separate modes. The joint edges crumble away due to impact from traffic and /or the sealant used within the joint dries and cracks, allowing water ingress which causes carbonation of the concrete around the joint.
Belzona Solution: A combination of Belzona 4000 Series Magma Polymers and Belzona’s 2000 Series Elastomers provide a long-term solution to both of these inherent problems, can have the area repaired in a fraction of the time that would be required for a conventional repair. Belzona is also widely used to seal cracks which develop in tanks.
SAFETY
- Apply a non-skid surface to floors and tops of retaining walls.
Problem: Health and safety has become an extremely important part of our lives in recent years and there is no reason to believe that this will not continue. Personal and personnel safety is vital and hazardous work areas due to slippery surfaces will not be tolerated now or in the future. Many conventional solutions like non-skid tapes have been found to be inferior due to premature wear out, loss of bond to the substrate or the fact that they can not be cleaned without sustaining some level of damage.
Belzona Solution: Belzona Non Skid Safety Grip Systems have been widely proven to provide long-term positive grip in many hazardous areas. They can be applied quickly and easily to virtually all substrates and will tolerate high pressure washing and even steam cleaning without damage. Many different grades are available and thus the system can be tailored to the environment in which it must operate.
TANKS
TANK TOPS
- Seal seams on floating tank tops.
Problem: Often leakage and product contamination can occur due to weld seam porosity or fatigue cracking of welded joints and seams.
Belzona Solution: The high level of elasticity of the Belzona 2000 Series Elastomers makes this range of products ideal for long-term flexible repair and sealing applications.
For other applications to tank tops, such as water-proofing, rebuilding corrosion pitting, protecting against chemical attack, repair/resurface floating tank top seals, contact your local Belzona Technical Consultant.
INTERNAL STRUCTURES
- Protect internal steelwork against corrosion and chemical attack.
- Rebuild and seal baffles and division plates.
Problem: The internal structures contained within a storage tank or process vessel are subject to attack by both erosive and corrosive forces. If this attack was allowed to proceed unchecked then the ultimate result would be the collapse of the tank.
Belzona Solution: Belzona 1000 Series Metallic Polymers are proven to provide excellent erosion and corrosion resistance. The Belzona 4000 Series Magma Polymers can provide unparalleled protection against a wide range of common chemicals. Both of these product ranges can be used to protect the internal surfaces of tanks and vessels over an impressive operating temperature range.
SEAMS AND PENETRATIONS
- Seal cracked or porous welds.
- Seal bolted or riveted joints.
- Protect weld seams from corrosion and cheical attack.
- Repair leaks around manways and ports.
Problem: Sealing tank seams and penetrations can be difficult with conventional systems due to the fact that a number of different substrates can be involved. Because each of these substrates has a different rate of expansion and contraction this can cause conventional systems to lose adhesion.
Belzona Solution: Belzona systems are largely unaffected by differing expansion rates and thus have the ability to create long-term seals between many different and varied substrates.
LININGS
- Repair/renew damaged coatings.
Problem: Many storage tanks and vessels need to have all of their internal surfaces protected from corrosion or chemical attack - depending upon the nature of the liquid being stored - by the application of a barrier coating. Unfortunately the standard barrier coatings normally used will either only provide protection from specific liquids stored under specific conditions or more often sustain damaged during service and prematurely fail.
Belzona Solution: Belzona’s unique product range is the most versatile of any currently available. They can be used to repair small areas of damage sustained by existing linings or can be used to completely renew and or replace the existing lining. They have excellent wide ranging chemical resistance and cover a working temperature range of -30 up to 185 degrees Centigrade.
INSULATION AND ENERGY CONSERVATION
- Protect soft insulation against impact damage.
- Waterproof insulation and claddings.
- Coat exposed tank top and wall surfaces to reduce thermal loading.
- Coat exposed tank top and wall surfaces to reduce condensation.
Problem: When water penetrates and becomes trapped within insulation, under insulation corrosion can occur. On carbon steel the result is rust and on stainless steel stress corrosion cracking, a far more serious problem, can occur. In addition to these costly problems there is also an excessive loss of energy which in itself becomes a substantial, yet unnecessary, cost for any company.
Belzona Solution: Belzona’s waterproofing system for insulation protects against weather and mechanical damage, yet allows internal moisture to evaporate out through the membrane, thus keeping the insulation dry and therefore protecting the metal below.
EXTERNAL STRUCTURES AND SUPPORTS
- Reform saddle supports for horizontal tanks.
- Provide electrical insulation between tank and support.
Problem: When water becomes trapped between the saddle support and the pipe or vessel the inevitable result is corrosion of the outer surface of the pipe/vessel. This form of corrosion is usually called crevice corrosion and can be extremely severe.
Belzona Solution: Belzona products can be utilized to completely eliminate this problem since they are electrically neutral, possess high load bearing capability and, since they contain no volatile solvents, do not shrink on cure.
Secure loose anchor bolts.
Problem: Machinery anchor bolts become loose over time due to vibration, shock loading and chemical attack. This can lead to further problems, especially with pump and motor sets, such as damage to seals, shafts, couplings and bearings.
Belzona Solution: Using simple techniques, Belzona products can be used to either grout new anchor bolts or stabilize existing anchor bolts.