4" Class 150 Flange Stud Hole Insert - Black LDPE

Low-density polyethylene stud hole insert sized to protect 4" ANSI 150 class flange faces.

This protective cap features four integral ribs that engage the bolt holes around a flange, holding it firmly in place over the raised face. Moulded from high-quality LDPE, it shields the gasket sealing surface and exposed bore from moisture ingress, dirt contamination, paint overspray and incidental oil contact during fabrication, transport, storage and on-site maintenance.

Key Features

• Four engagement ribs push into stud bolt holes for secure positioning
• Protects flange gasket faces and sealing surfaces from damage and contamination
• LDPE material resists moisture, dirt, paint and most oils
• Quick to fit and remove without tools
• Cost-effective alternative to full-face protectors

Specifications

• Nominal flange size: 4" ANSI
• Pressure class: 150
• Material: LDPE (low-density polyethylene)
• Colour: Black

Applications

• Oil and gas refining plant equipment protection
• Hydraulic system flange preservation
• Storage and transportation of flanged pipework
• Production line flange safeguarding
• Maintenance and shutdown flange cover