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Stainless Steel

Stainless steel is an inherently corrosion resistant material ideal for use in some of the more demanding applications. Extensively used within the pharmaceutical, chemical, food & beverage and oil & gas industries, farming communities, and for the gaseous zones of some mesophilic and thermophilic anaerobic digester tanks.

Stainless Steel

Permastore stainless steel products are developed using the latest computer aided design principles taking into account the most efficient use of the grades of steel being used and the application they are to be used within.

All material is supplied in either a 2B cold rolled mill finish or a 1D hot rolled  finish, based upon the thickness of material supplied.

This provides a good  balance between the material properties of the steel and its aesthetic finish with Permastore always sourcing directly from a steel mill, or primary stockholders, and not from brokers.

Fabricated components are manufactured to Permastore’s independently tested and verified Welding Procedure Qualification Records (WPQR) to BS EN ISO 15614-1 and Welding Procedure Specifications (WPS) by fully certified coded welders to BS EN ISO 9606-1.

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Stainless Steel Old

Components are post weld cleaned and finished ensuring the best possible overall appearance and presentation of the finished product. When in sheet form the material is poly-coated on the external surface to protect the finish during both manufacture and installation.

A PERMASTORE® stainless steel containment and storage structure is constructed from a number of different components including the tank shell, access ladders, walkways, pipework connections and the roof.  One of the most significant risks to the satisfactory long-term performance to it is the risk of bimetallic corrosion when dissimilar metals such as stainless steel and mild steel effectively come into “electrical contact” via an electrolyte which could be from the  contents held within a tank  or  from rainwater or a humid external environment. Bimetallic corrosion can be prevented by insulating dissimilar metals or by preventing contact with an electrolyte using a suitable gasket, sealant, or a paint coating system. Permastore ensure that where dissimilar metals are used in its structures the products are designed with full consideration given to protect them.

Permastore stainless steel products are designed for a long maintenance free life.  They are readily recyclable at the end of their economic life and are a valuable useable feedstock for stainless steel producers, thus contributing to sustainable development.

  • Application: pH range: pH 3-11
  • Material Grades: stainless steel 316/1.4401 and 316L/1.4404
  • Manufactured in accordance with EN 10088 or relevant international standards, including ASTM A240/ASME SA-240 as appropriate.

Stainless steels are generally very corrosion resistant and will perform satisfactorily in most environments. They do not suffer from the general loss of section that is characteristic of rusting in irons and carbon steels.  However, this does not negate the requirement for the process designer to carefully consider the nature of the tank contents being stored, storage temperature and chemical composition, upon the rate of corrosion which ultimately could have an impact upon the tank structure’s performance and design life.

Permastore select stainless steel material grades and thicknesses that provide a combination of strength, durability, and corrosion resistance. However, when process designers specify a grade of stainless steel to be used on a project due consideration should be given to chemical concentration and temperature as significant factors in their design review.

Chemical resistance and physical properties of stainless steel are published on the British Stainless Steel Association website at bssa.org.uk/technical-help/. Guidance should be considered to ensure that stainless steel grade(s) selected are appropriate for the chosen application

The performance of a PERMASTORE® stainless steel containment and storage structure which is regularly inspected and maintained in accordance with the manufacturer’s recommendations has the potential to achieve a service life up to 40 years.

Applications include:

  • Food and beverage industrial process treatment and storage tanks
  • Pharmaceutical and chemical process treatment and storage tanks
  • Dairy farming pasteurisation tanks
  • Potable Water (certified to NSF/ANSI/CAN 61)
  • Upflow Anaerobic Sludge Blanket (UASB) reactor tanks
  • Mesophilic Digester Tanks (Gaseous Zone)
  • Thermophilic Digester Tanks (Gaseous Zone)

All applications are subject to chemical concentration and temperature considerations. All specifications relate to the contact surfaces only.

Case Studies

Stainless Steel Old

Stainless Steel Tank
Avonmouth, Wiltshire UK

Application: Stainless Steel Tank
Capacity: TBA
Model: TBA
Location: Avonmouth, Wiltshire UK
Client: Wessex Water

Stainless Steel Old

Stainless Steel Tank
Thornford, Dorset UK

Application: Stainless Steel Tank
Capacity: TBA
Model: TBA
Location: Thornford, Dorset, UK

Stainless Steel Old

Stainless Steel Tank
Watchet, Somerset, UK

Application: Stainless Steel Tank
Capacity: TBA
Model: TBA
Location: Watchet, Somerset, UK

Stainless Steel Old

Stainless Steel Tank
Avonmouth, Wiltshire UK

Application: Stainless Steel Tank
Capacity: TBA
Model: TBA
Location: Avonmouth, Wiltshire UK
Client: Wessex Water

Stainless Steel Old

Stainless Steel Tank
Thornford, Dorset UK

Application: Stainless Steel Tank
Capacity: TBA
Model: TBA
Location: Thornford, Dorset, UK

Stainless Steel Old

Stainless Steel Tank
Watchet, Somerset, UK

Application: Stainless Steel Tank
Capacity: TBA
Model: TBA
Location: Watchet, Somerset, UK