APF Foam in Place Inspection Plug

APF Foam in Place Inspection Plug

Designed for Tanks Insulated with a Polyurethane Spray on Insulation. Standard Temp Range: 33 - 500 °F

Innovative Flanged Spool Plug

The Flanged Spool Inspection Port Assembly (FS-1), nicknamed the 'spool', is a plug designed for mounting on a tank that is insulated with a polyurethane spray on insulation, without any jacketing. It is a double flanged inspection port that can be mounted to the tank surface using either silicone or mastic and then have the polyurethane sprayed around it. Once the foam hardens, a permanent inspection hole is created, giving a customer a cost-effective solution for future inspections.

The FS-1 can be configured to almost any thickness since Access Plug Flange cuts the sleeve prior to press fitting the flanges to it. Once the flanges have been press-fitted to the sleeve, a permanent solution is created.


The FS-1 comes standard in the 2 1/2", 500 °F configuration, but other configurations can be designed around your needs. Any Access Plug Flange inspection port can be configured to work with this application.

The FS-1 flanged spool inspection port carries Access Plug Flange's technology of the most reliable sealing mechanism on the market today.

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Access Plug Flange Application & Industries

Access Plug Flange's product offerings are used in many different industries ranging from petrochemical and refining to food processing and pharmaceutical. Their extensive product offerings and large global installed base in these various industries demonstrate their customers' confidence in choosing Access Plug Flange products. Industries include:

  • Petrochemical
  • Refining
  • Pulp and Paper
  • Food Processing
  • Pharmaceutical
  • Chemical

Standard Installation Instructions

Note: There is a $25 small order fee for orders under $100

Description Part # Saved Price Select Option Add to
2 1/2 Access Plug Flange Spool Assembly, Aluminum Flat Flange, Red Silicone Access Inspection Plug w/Copper Sleeve, Variable Length Standoff Tube. Temp Range: 33 - 500 °F CUI-APF-SP1 Request Pricing