Glass fused to
steel tanks

Vitreous enamel coating, also known as glass fused to steel (GFS), is a silica-based fused coating that is widely used as a corrosion resistant protective coating in the water and wastewater industry.

Glass fused to steel tanks brochure

Glass fused to steel tanks brochure

Balmoral glass fused to steel (GFS) tanks

The term vitreous enamel comes from the word vitrification describing the transition of a substance into a glass. At typical vitreous enamel firing temperatures, usually in the range of 830-850°C, the coating reaches full mobility and viscosity.

During this period, interaction between the glass and steel accelerates, an interfacial adhesion layer is formed and synthesis of the two materials takes place.

Balmoral’s enamel system combines the strength of steel with the corrosion and scratch resistance of glass.

Compared to other spray application methods, which often use inorganic clays to suspend the particles in water, enamel powder coating provides the proven optimal purity. This technical advantage combined with Balmoral’s process represents a new level of excellence in glass fused to steel tanks and silos.

Balmoral’s enamel system provides optimum purity
Tough resilient coating
A composite with the strength and flexibility of steel
Chemically inactive coating and unaffected by UV light
Balmoral glass fused to steel tanks

Balmoral GFS tanks

Balmoral’s manufacturing process was designed to provide clients with a high performing, economical coating designed specifically for the containment of potable water and uncovered municipal wastewater tanks.

Balmoral GFS Premium

The Premium option was developed to deliver heightened performance and long-term value to asset owners and users around the world in more demanding applications.

Specification

Balmoral product Coating applications EN ISO 28765 Group pH resistance Test voltage (V) Thickness (µm)
GFS 2 coat, 1 fire 2 3-9 700 200-360
GFS Premium 3 coat, 2 fire 3 2-11 1100 260-460
GFS Premium Plus 3 coat, 2 fire 4 1-14 1500 340-500

Features and benefits

Unique and coveted glass formulation using bespoke ingredients
New level of excellence in glass enamel coating technology
Unique ‘dry’ electrostatic application
Optimal purity
Increased coating coverage
Less reliance on in-field solutions
Meets and exceeds coating requirements of EN ISO 28765
Confidence in coating quality and performance
Modular system
Fast, efficient construction
Factory applied coating under Balmoral’s unique 6S quality system
Consistent and regulated quality wherever the tank is shipped and built
No re-coating requirement
Long life coating requiring minimum maintenance
Designed and specified not to corrode
Zero corrosion allowance required reducing unnecessary material and cost
High performing coating
UV stable, abrasion resistance increases life span and minimises through life maintenance

Applications

Agricultural digesters
Borehole/brackish/seawater
Dry bulk solids
Fire water storage
Filter tanks
Industrial effluent/aeration processing
Liquid leachate
Municipal sludge storage
Municipal sludge treatment
Municipal mesophilic digesters
Municipal sludge cake storage
Potable drinking water
Municipal mesophilic digesters
Municipal sludge cake storage
Potable drinking water
Storm water
Thermophilic digesters
Balmoral glass fused to steel tanks
Balmoral glass fused to steel tanks
Balmoral glass fused to steel tanks

GFS coating performance and quality standards

Internal coating

Description Test standard Test type Result
Dry film thickness ISO 2178 Coating Thickness 260µm – 460µm (10-18mils)
Citric Acid / Sulphuric Acid / Hydrochloric Acid ISO 28706-1 Clause 9 / 10 / 11 Chemical Resistance Min. Class AA
Boiling Citric Acid ISO 28706-2 Clause 10 Accelerated Chemical – Non-Linear Max. 0.75 g/m2
Boiling Water – Liquid Phase ISO 28706-2 Clause 13 Accelerated Chemical – Non-Linear Max. 2.5g/m2
Detergent Solutions ISO 28706-3 Clause 9 Accelerated Chemical – Non-Linear Max. 2.5g/m2
Hot Sodium Hydroxide ISO 28706-4 Clause 9 Accelerated Chemical – Linear Max. 0.876 mm/a
Boiling Water – Vapour Phase ISO 28706-2 Clause 13 Accelerated Chemical – Linear Max. 0.328 mm/a
Boiling Hydrochloric Acid – Vapour Phase ISO 28706-2 Clause 12 Accelerated Chemical – Linear Max. 0.146 mm/a
Thermal Shock ISO 28763 Annex A Physical Properties No Damage at 350c
Adhesion EN10209 Annex C Physical Properties Min. Class 2
Impact Resistance ISO 4532 Physical Properties Min. 40N
Abrasion Resistance ISO 6370-2 Physical Properties Max. 45g/m2
Scratch Hardness EN 15771 Physical Properties Min. Mohs 5
Holiday Test ISO 2746 – Test A Coating Porosity 100% discontinuity free at test voltage

External coating

Description Test standard Test type Result
Dry film thickness ISO 2178 Physical Properties 160µm – 500µm (6-19mils)
Colour L.a.b. Colour Space Spectrophotometry Min. EN ISO 28765
Adhesion EN10209 Annex C Physical Properties Min. Class 2
Scratch Hardness EN 15771 Physical Properties Min. Mohs 5
Impact Resistance ISO 4532 Physical Properties Min. 40N

GFS coating process

Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process
Epoxy coating process

Tank installation

Balmoral operates via a network of distributors worldwide that are trained in all areas of tank construction. Experienced Balmoral service engineers are available if additional support is required.

There are two main methods of building modular tanks:

Tank installation scaffolding

Scaffolding

Scaffold building suits open top tanks and tanks in areas of the world where the importation of jacks is difficult or restricted by customs laws.

Tank installation jacking

Jacking

Jack building suits tanks with covers, tall tanks, and project sites where working at height is restricted or perilous. The jacks are normally shipped with the tank kit and allow for the majority of works to be completed within 2.4m of ground level.

Foundations

With value engineering at the heart of material selection, Balmoral Tanks’ GFS coating meets all necessary design life expectations. Key factors in achieving optimum product performance begin with the design and manufacturing process, running right through to installation. Retaining in-house control and quality in each of those critical areas is vital in ensuring consistent high levels of performance of any coated steel tank.

Balmoral’s GFS system, and its inherent performance properties, ensures the end user receives the best design life expectancy available. The company’s quality assurance standards and installation experience delivers a robust product that is more than capable of design life performance.

Note: Bases may vary to suit individual site requirements.

Rebate foundation
Floor kit foundation
Flat base foundation
Embedded starter ring foundation

Enquiries

-

Additional information (if known)

Please give an indication of required tank capacity
Is your tank installation to be located indoors or outdoors?
Please provide foundation type/information, if known
Please provide accessibility distances around the proposed tank location

View Balmoral Tanks terms and conditions of use.

Related products

Balmoral Group

©2020 Balmoral Group Holdings Ltd

Search