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Plates & Profiles
Steel Plate Flanges & Blank Flanges
Flat plate flanges, blank (blanking) flanges and backing rings cut from steel plate and drilled to the bolt pattern on your drawing — ideal for non-standard sizes and short runs.
- TypesBlank/blanking flanges, ring (plate) flanges, backing rings, custom flanges
- DrillingTo your drawing, or to a standard pattern you specify — confirmed before cutting
- MaterialsMild/carbon steel, stainless steel, aluminium
- HolesPlasma cut or drilled; tapped holes on request
Made to order · Price on application · One-offs and batch quantities
REQUEST A QUOTEor call 0151 547 1221Plate flanges cut from the sheet
Plasma cutting is a quick way to make flat flanges: ring flanges with a bore, blank flanges to close off a line or nozzle, backing rings, and non-standard flanges for ductwork, tanks, fans and equipment where a forged flange isn't available or isn't needed.
The outside diameter, bore and bolt holes come from one program, so the bolt circle is concentric and repeatable across a batch. For tighter fits, bolt holes can be drilled after cutting.
Matching a standard drilling
If your flange needs to mate with a standard pipe flange, give us the drilling standard and size (for example PN16 DN100, or ANSI/ASME Class 150) and we'll work from the published dimensions, or send your own drawing. We'll confirm the drilling with you before cutting.
Plate flanges we cut are flat profiles. They are not supplied as pressure-rated or certified pipe flanges; if your application is a pressure system, your designer must confirm suitability and any testing or certification required.
Technical information
| Types | Blank/blanking flanges, ring (plate) flanges, backing rings, custom flanges |
|---|---|
| Drilling | To your drawing, or to a standard pattern you specify — confirmed before cutting |
| Materials | Mild/carbon steel, stainless steel, aluminium |
| Holes | Plasma cut or drilled; tapped holes on request |
| Certification | Not supplied as pressure-rated/certified flanges |
Materials
- Mild/carbon steel
- Stainless steel
- Aluminium
Processes
- CNC plasma cutting
- Drilling
- Tapping
Customisation
- OD, bore and thickness
- Bolt circle and hole count
- Blank or ring
- Raised features or welded spigots on request
Applications
- Ductwork, fan and extraction connections
- Tank and vessel nozzle covers (non-pressure)
- Equipment and machinery flanges
- Blanking off redundant pipework (non-pressure)
How to order
Send your drawing (DXF, DWG or PDF) or a dimensioned sketch with the material, thickness and quantity. We'll check it, ask about anything unclear, and reply with a price and lead time. Once approved, parts are made in our Knowsley workshop for collection or UK delivery.
Questions we're often asked
Can you drill to PN16 or ANSI 150?
Yes — tell us the standard and size and we'll cut to the published bolt pattern, confirming it with you first.
Are your flanges pressure rated?
No. Plate flanges are supplied as cut profiles to your drawing. Pressure applications need a suitably rated, certified flange.
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Need steel plate flanges & blank flanges?
Send your drawing or sketch and we'll come back with a price and lead time.