A slip on plate flange is a flat steel disc cut from certified plate stock, with no hub and no neck. The pipe passes through the bore and is fillet-welded on the back face, forming the lightest and lowest-cost flanged joint in the EN 1092-1 range. It is the flange of choice for low-pressure.
Products Manufacturing Process
Products Advantages
Lighter flanges cut handling and transport cost, simplify one-person installation in tight spaces, and the saving multiplies on long runs with a high flange count.
Machining time per flange is shorter than a hubbed flange - no hub profile, no tapered bore - so piece price stays low even in small quantities.
Flat face as standard bolts straight onto cast-iron pumps, valves, and nozzles without an adapter.
Products Service Limits
- Pressure ceiling PN16 in the standard range (PN25/PN40 available on small sizes by request); above that, step up to a hubbed Type 11 or a Type 12 weld neck.
- No severe cyclic loading, vibration, or thermal cycling - the fillet weld and the thin plate profile leave no fatigue margin.
- Not for steam or high-temperature condensate; carbon steel ratings fall steeply above 300 °C in the EN 1092-1 tables, and the plate profile has no hub to shed heat.
Products Specification
|
Parameter |
Specification |
|
Product Name |
Slip On Plate Flange |
|
Governing Standard |
ASME B16.5, ASME B16.47, AWWA C207 EN 1092-1Type 01 DIN 2573, DIN 2576, DIN 2501, DIN 2502 JIS B2220 (5K, 10K, 16K, 20K) |
|
Nominal Size |
1/2" - 48" (DN15 - DN1200) |
|
Pressure Rating |
Class 150, Class 300 PN6 / PN10 / PN16 (PN25 / PN40 on small sizes by request) |
|
Facing |
Flat Face (FF), Raised Face (RF) |
|
Materials |
Carbon steel P250GH (1.0460); stainless 304 / 316 / 316L |
|
Bore |
Slip-over pipe outside diameter |
|
Connection |
Single fillet weld on back face |
|
Surface Treatment |
Oil finish; painted or galvanized finish on request |
|
Application Medium |
Water, drainage, air, and non-aggressive fluids |
Products Applications
Primary slip on plate flange service covers low-pressure, high-flange-count lines
Potable water and drainage networks
Distribution runs and gravity drainage at PN10.
Irrigation headers
Rural water projects and agricultural pumping stations, where a single job can carry hundreds of joints.
Fire sprinkler mains
Low-pressure sprinkler and standpipe systems at PN10/PN16.
Plant air and temporary utility lines
High flange counts where the weight saving shows up in the erection bill.
FAQ
Q: Is a plate flange forged or machined?
A: Machined from plate. The disc is cut from certified plate stock, then bored, faced, and drilled. There is no forging die and no hub profile to machine - that is the source of the price difference against a hubbed Type 11 flange.
Q: Can a slip-on plate flange carry steam?
A: No. A Type 01 plate flange is built for low-pressure, non-critical service. For steam, high-temperature condensate, or cyclic duty, specify a hubbed slip-on (Type 11) or a weld neck (Type 12) with the correct pressure–temperature rating for the material.
Q: Are DIN 2576 and EN 1092-1 Type 01 flanges interchangeable?
A: They are dimensionally close for common PN10 sizes, but differences exist in thickness, pitch circle diameters, and facing dimensions. While they are not formally identical, we can manufacture and supply both DIN 2576 and EN 1092-1 Type 01 flanges, as well as a full range of American (ASME/ANSI/AWWA) and European (EN/DIN/BS) standard products. Simply specify your required standard or provide your drawing when inquiring, and we will quote accordingly.
Request a Quote
Send the DN, pressure rating, and quantity - plate flange batches quote fast, and we supply a material certificate for every heat.
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