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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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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.

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Performance of Stainless Steel

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 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.

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.

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.

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
  • Dairy farming pasteurisation tanks
  • Potable Water
  • 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.

We built a 39' diameter parallel beam roof and completed this in record time, in less than 3 days. We love this new standardised roof design.

General Manager at H2Flow Tanks

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The level of quality of PERMASTORE® Glass-Fused-to-Steel tanks is unbeatable.

Owner of CubicStore

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We choose Permastore for our customers as we believe in its reliable and unbeatable quality. We just built a 9,200 m3 GFtS AD Tank and it worked well.

Smart Tank , Thailand

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Permastore® Products are of great quality and have delivered consistent quality in their products. We have constantly gone back to them Year on Year.

Infrastructure head of Hindustan Coca-Cola Beverages Pvt. Ltd.

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