Bronze Slip-On Flanges Manufacturer & Exporter
Slip-on flanges are machined from bronze and copper-alloy grades so that the pipe slides into the bore and is secured by fillet welding or brazing, depending on material and procedure.
What is a Slip-On flange?
A slip-on flange has a bore slightly larger than the outside diameter of the pipe it is fitted to. The pipe slides into the flange, is positioned just short of the face, and is joined to the flange by a fillet at the back and, where the design calls for it, at the face. Because there is no hub, the flange is compact and economical, and alignment during assembly is straightforward.
Compared with a weld-neck design, the slip-on does not carry the same stress-concentration advantage at the pipe joint, so it is most often selected for moderate pressure and temperature, and for systems that are not subject to severe cyclic loading. In copper alloys the joint is frequently made by brazing or an appropriate welding procedure for the specific alloy.
Construction
- Flange ring with bore clearance for pipe OD
- Flat face or raised face, as specified
- Bolt holes drilled to the specified pattern (PCD) and diameter
- Optional hub-less or short-hub profile per standard or drawing
- Face finish and serrations as specified by the standard or customer
Values vary according to applicable specification, material condition and customer requirements.
Slip-On Bronze Flanges — specification
| Connection | Slip over pipe; fillet-welded or brazed as appropriate to alloy |
|---|---|
| Bore | Standard or custom, to suit pipe OD |
| Facing | Flat face / raised face / custom |
| Pressure class | As defined by the applicable standard |
| Sizes | As per customer requirement / applicable standard |
| Pressure classes | Pressure classes and pressure-temperature ratings are defined by the standard applied and depend on alloy and temperature. Available as per applicable material and dimensional standard. |
| Facing options | Flat face (FF), raised face (RF) or custom facing as specified by the standard or drawing. |
| Standards | Typical reference standards for copper-alloy flanges include ASME B16.24 (cast copper alloy pipe flanges and flanged fittings), MSS SP-106 (cast copper alloy flanges and flanged fittings) and EN 1092-3 (copper alloy flanges). Customer drawings and other national or project standards are also worked to. The standard to be applied is confirmed when the enquiry is reviewed. |
|---|---|
| Dimensions | Outside diameter, thickness, bore, bolt-circle diameter, number and size of holes per the standard or customer drawing. Available as per applicable material and dimensional standard. |
Available bronze materials
Available as per applicable material and dimensional standard. Select a grade for composition limits, mechanical properties and corrosion notes.
| UNS grade | Alloy family | Note |
|---|---|---|
| UNS C95800 | Nickel aluminium bronze, NAB (Cu-Al-Ni-Fe-Mn) | UNS C95800 is the standard cast nickel aluminium bronze for seawater service. |
| UNS C95400 | Aluminium bronze (Cu-Al-Fe) | UNS C95400 is a heat-treatable aluminium bronze that combines high strength with good wear and corrosion performance, making it a common choice for demanding pump, valve and marine components. |
| UNS C83600 | Leaded red brass / composition bronze (Cu-Sn-Pb-Zn) | UNS C83600 — commonly called gunmetal, composition bronze or red bronze — is the traditional general-purpose cast alloy for valves, pump parts and pipe fittings, and the material behind our gunmetal flanges. |
| UNS C93200 | Leaded tin bronze (Cu-Sn-Pb-Zn) | UNS C93200 is a leaded tin bronze widely used where free machining, good pressure tightness in castings and bearing behaviour matter more than very high strength. |
Where these flanges are used
- Cooling-water and seawater lines (grade-dependent)
- Pump and valve connections
- Moderate-pressure industrial pipework
- Marine and shipboard piping systems
See also: Marine · Industrial Piping · Pumps & Valves.
Inspection and testing
- Bore diameter against pipe OD
- Flange thickness and outside diameter
- Facing, face finish and flatness
- Hole pattern (PCD) and bolt-hole size
- Material identification and documents as agreed (MTC, inspection report, as applicable)
Made to your specification
Non-standard bore clearances, hub heights, drilling and face details can be produced to your drawing. State the pipe OD, wall thickness and joining method in your enquiry.
For non-standard dimensions, see custom & special flanges.
Related flange types
- Blind FlangesBlind flanges are solid discs used to close the end of a pipe, valve or pressure vessel nozzle.
- Plate FlangesPlate flanges are flat rings with a bore and a bolt-hole pattern.
- Lap Joint FlangesA lap joint flange is a loose flange used together with a stub end.
Have a Bronze Flange Requirement?
Send us your drawing, specification, material grade, size and quantity.