MONOLITHIC
ISOLATION JOINT
GENERAL
A Monolithic Isolation Joint (MIJ) is a specialized component used in pipelines to provide electrical isolation
between different sections of the pipeline. The Purpose of the isolation joint is to prevent detrimental electro-chemical
interaction and improve the effectiveness of the cathodic protection system. Isolating joints are also used to ensure effective
current distribution for cathodic protection system.
FUNCTIONAL REQUIREMENTS
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Isolation joint shall be suitable for Pigging Operation.
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Slip-on Flanges shall not be used.
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The isolation joints shall be able to withstand the operating conditions
stated in the requisition sheets.
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Where the operating conditions are not stated, the following operating conditions shall apply.
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Installation: Above ground
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Design temperature: 0°C ~ +90°C
FEATURES
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Chemical resistance: Some MIJ are made of materials that are resistant to
chemical corrosion, which makes them suitable for use in chemical processing plants or other environments where chemicals
are present.
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Wide temperature range: MIJ are designed to withstand a wide range of
temperatures, making them suitable for use in a variety of applications.
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Easy to install: MIJ are easy to install, as they do not require
any special tools or equipment.
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Non-conductive material: The primary feature of MIJ is that it is made of a
non-conductive material, which prevents the transfer of electrical current.