Coverings Systems Range
Arma-Chek
Covering Systems
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Main target:
• provide UV protection and increase the insulation life expectancy
• reduce risk of CUI
• protect insulation against mechanical impact
• protect from salt water, extreme weather conditions
Arma Chek provide exceptionally high resistance against UV, oil, chemical and extreme weather.
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Arma Chek helps to reduce the risk of CUI
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Offshore applications Marine and ship building Petrochemical industries Energy plants & storage facilities
CUI = Corrosion under Insulation / The Challenge CUI is often difficult to identify because it is hidden beneath insulation
and jacketing until it becomes a more serious problem…
how does CUI occur?- insulation covering is breached- water ingress into the insulation- water and oxygen reach the metal surface
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Corrosion – mechanism
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• wet corrosionpresence of moisture (water, humidity) containing oxygen
• galvanic corrosioncontact (also through wet insulation) of two metals with different electrode potentials;metal cladding can be affected by this type of corrosion
• Stress Corrosion Cracking (SCC) occurs in austenitic stainless steel if exposed simultaneously to the three trigger factors: - stresses within the metal - moisture - halogen ions (chloride, bromide, etc.)
• rust product: Fe(OH)2 and Fe(OH)3
• Corrosion Under Insulation (CUI) is accelerated by: - availability of oxygen - high temperature - concentration of dissolved ions.
Additional consequences of CUI
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CUI – what cost?
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• The highest incidence of leaks in the refining and chemical industries are due to CUI and not process corrosion.
• Between 40% and 60% of piping maintenance costs are CUI related.
• The problems caused by CUI caused the oil & gas industry to consider moving away from mineral wool insulation.
CUI / Corrosion Under Insulation
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Material with open cell structure
Elastomeric material with closed cell structure
External vapor barrier = concentrated diffusion resistance
Ambient airPartial pressure of water vapor
Closed cells = distributed diffusion resistance
Fibrous and Open Cell Risk
Risk of Fluid/Pressure Loss
Wicking
Galvanic Corrosion
Water Spray / Moisture 100% protection from external vapour barrier and metal cladding
Resistance to Water Vapour Diffusion
No 1 risk to industry is CUI
CUI / Corrosion Under Insulation10
Elastomeric, Closed-Cell Foam (FEF) minimise the risk of CUI
Material with open cell structure
Elastomeric material with closed cell structure
Partial pressure of water vapor
Closed cells = distributed diffusion resistance
Water Spray / Moisture 100% protection from Nitrile Rubber
External vapor barrier = concentrated diffusion resistance
Resistance to Water Vapour Diffusion
Ambient air
Arma Chek System of Insulation and Coverings 11
In ready-made versionTubes & Sheets Fittings
Insulation with covering
Arma-Chek D(AF)Arma-Chek D(NH)Arma-Chek D(CLO)Arma-Chek-Silver (AF)Arma-Chek Silver (ACE)Arma-Chek SDArma-Chek R grey (AF, NH, HT)Arma-Chek R black (AF, NH) Elbows, bends, tees
Covering Arma-Chek DArma-Chek R greyArma-Chek Silver
Accessories Arma-Chek D TapeArma-Chek Silver Tape
Arma-Chek D MastikArma-Chek Silver Mastik
Arma-Chek Systems of Insulation and Coverings 12
Metal coatingOkabell®
Non metalic coveringArma-Chek® D
Rubber coatingArma-Chek® R
2 in 1-precovered systemArma-Chek® Silver
Arma Chek System of Insulation and Coverings
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Arma-Chek D
Arma-Chek R
Arma-Chek Silver
Industria, Offshore
Heavy Industry
Manufacturing Industry
Refrigeration cooling
Heating, Ventilation, Air Conditioning
Manufacturing Industry
Clean Industry
Industrial, Offshore
Marine Manufacturing Industry
Heavy Industry
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www.armacell.com
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