SKU FLC027
4" Class 600 Flange Stud Hole Insert - Black LDPE
£12.00incl. VAT
Not sure it's the right size? Ask a person.
Product details
Black LDPE stud hole insert designed to protect the bolt holes and sealing surface of a 4" 600 Class flange.
This flange protector features four ribs that engage into the stud holes around the flange perimeter, holding it firmly in place during storage, shipping and maintenance. Manufactured from high-quality LDPE plastic, it resists moisture, dirt, paint splatter and most mineral oils, safeguarding the critical gasket sealing face from contamination and mechanical damage.
Key Features
- Four engagement ribs push into flange stud holes for secure positioning
- LDPE plastic construction resists moisture, dirt, paint and oils
- Quick and cost-effective installation—no tools required
- Protects flange sealing surfaces during production, transit and storage
- Widely used in oil and gas refining and hydraulic system applications
Specifications
- Nominal flange size: 4" ANSI
- Pressure rating: 600 Class
- Material: LDPE (low-density polyethylene)
- Colour: Black
- Design: Stud hole engagement ribs (four-point)
Applications
- Oil and gas refinery flange protection
- Hydraulic system pipework
- Flange face protection during maintenance and storage
- Transit and warehouse protection
- Production line flange safeguarding
Sizing questions
Which class do I need?
Use the pressure class stamped on the flange rim. Inserts are sized to the bolt holes of that class, so an insert for a different class may not fit.
How many do I need?
One insert per bolt hole. The bolt-hole count depends on the flange size and class — count the holes on your flange.
ANSI or DIN — which is my flange?
ANSI / ASME flanges are sized in inches (for example 4") with a pressure class such as 150 or 300. DIN / EN flanges are sized in DN (for example DN 100) with a PN rating. The standard and size are normally stamped on the flange rim.