Flange Insulation Kit Ordering Checklist

Identify both flanges and the joint

Provide the flange standard, nominal size, class, facing and relevant bore details. For a replacement, include the kit designation and drawing rather than transferring one component from a different assembly.

The flange insulation kit page lists the main components. Confirm any supplier style code against the drawing, because a letter designation does not independently establish every component dimension.

List the complete component set

Component	What to specify
Central gasket	Construction, dimensions and sealing element.
Sleeves	Material, bolt clearance and finished length.
Insulating washers	Material, dimensions and quantity.
Metal backup washers	Material, dimensions and arrangement.
Identification	Kit reference, part numbers and packing by assembly.

The intended isolation path depends on the assembled components. A washer or sleeve substitution can therefore affect the assembly even if its outside dimensions look similar.

Separate material requirements

Phenolic, G10 and elastomer/PTFE sealing elements are different material decisions. G10 and FR-4 should not be treated as identical names without the specified grade. Include fluid and operating conditions as well as the electrical-isolation requirement.

Do not infer fire safety, pressure class or an electrical test result from a product photograph or a generic material name. Request evidence for the actual kit when the project requires a particular approval or test.

Define inspection and installation

Include the electrical test requirement, dimensional checks and any third-party witness points in the purchase description. The test method and assembled condition matter; they should match the responsible engineering specification.

Use the installation procedure for the selected kit and joint. Bolting, flange cleanliness and prevention of unintended conductive paths need the correct procedure rather than an assumed universal sequence.

Keep the quotation and packing list aligned

The quotation should identify the complete kit arrangement and quantity of each component. Ask for packing and labels that keep one assembly’s components together. For mixed sizes, retain a separate line for each flange and kit configuration.

The RFQ checklist provides a purchase-list format, while the measurement guide explains the dimensional drawing needed for a non-standard component.

Product construction and material details

Flange isolation gasket, sleeves and washers Flange isolation kit in protective packaging

Frequently asked questions

Can I order only the central gasket?

Yes, you can request the individual component, but identify the existing assembly and requirements. Do not assume it is equivalent to a complete kit.

Are G10 and FR-4 the same material?

They are not interchangeable names for procurement without a defined specification. Retain the exact grade and applicable requirements.

Does the flange pressure class certify the kit?

No. The complete product construction and supporting documents must meet the project requirement. A flange designation is not a product test certificate.