Flange Types

A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification.
Below are our available industrial pipe flanges that will meet your project needs. We will help you put together your entire project and ship it to your closest port.

We ship globally! Contact us to speak with one of our experienced staff, who can help you with your project needs.
Blind Flanges
Blind Flanges>>
The blind flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes.
Bending
Figure-8 Blanks >>
A figure-8 blank (also called a Spectacle Blind Flange) is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar.
Pipe tees
Lap Joint Flanges >>
The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face.
Pipe cross
Orifice Flanges >>
Orifice flanges are used instead of the standard pipe flanges when orifice plate or flow nozzle is used.
End caps
Reducing Flanges >>
Reducing flanges are used in pipe-to-pipe connections. Reducing flanges are a little easier to bolt up than non-reducing flanges.
Pipe reducer
RTJ Flanges >>
Ring Type Joint Flange is a method of ensuring leak proof flange connection at high pressures.
Stub end
Socket Welding Flanges >>
The socket welding flange is similar to a slip-on flange except it has a bore and a counterbore dimension.
Coupling Fittings
Slip-On Flanges >>
The Slip-on flange has a low hub because the pipe slips into the flange prior to welding.
Coupling Fittings
Threaded Flanges >>
Threaded (Screwed) flange is similar to the Slip-On flange, but the bore is threaded.
Coupling Fittings
Welding Neck Flanges >>
The Welding neck flanges is normally referred to as the high hub flange.
Flange process
Flanges process

Pipe flanges are manufactured in all the different materials like stainless steel, cast iron, aluminium, brass, bronze, plastic etc. but the most used material is forged carbon steel and have machined surfaces. In addition, flanges, like fittings and pipes, for specific purposes sometimes internally equipped with layers of materials of a completely different quality as the flanges themselves, which are "lined flanges".  The material of a flange, is basically set during the choice of the pipe, in most cases, a flange is of the same material as the pipe. All flanges, discussed on this website fall under the ASME en ASTM standards, unless otherwise indicated. ASME B16.5 describes dimensions, dimensional tolerances etc. and ASTM the different material qualities.

Size: 1/2" NB To 24" NB.
Class: 150#, 300#, 600#, 900#, 1500# & 2500#.

In addition, we also can produce the DIN flange, and the forgings according to the customers drawings, for example, rings and shafts.
Delivery requirment:
Marking: SunnySteel, material grade, standard, specification, heat no.
Surface Treatment: Bright annealed, polished outside and inside surface.
Package: Each pipe in a PVC bag and caps on both ends then bundled in wood case, (option: Bundle with knitted plastic bag/stee crate. )
Inspection: Third party inspection, or by clints

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Dimensions of spectacle blinds according to ASME B16.48

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Dimensions of spectacle blinds according to  ASME  B16.48 for installation between  ASME B16.5 flanges. Material Symbol C Mn P S Si Ni Cr Mo Cu N V Co ASTM A105 0.35 0.60-1.05 0.035 0.04 0.10-0.35 0.4 0.3 0.12 0.4 _ 0.08 _ ASTM A350 LF2 0.3 0.60-1.35 0.035 0.04 0.15-0.30 0.4 0.3 0.12 0.4 _ 0.08 0.02 ASTM A182 F304 0.08 2 0.045 0.03 1 8.0-11.0 18.0-20.0 _ _ _ _ _ ASTM A182 F304L 0.03 2 0.045 0.03 1 8.0-13.0 18.0-20.0 _ _ _ _ _ ASTM A182 F316 0.08 2 0.045 0.03 1 10.0-14.0 16.0-18.0 2.00-3.00 _ _ _ _ ASTM A182 F316L 0.03 2 0.045 0.03 1 10.0-15.0 16.0-18.0 2.00-3.00 _ _ _ _ ASTM A182 F321 0.08 2 0.045 0.03 1 9.0-12.0 17.0-19.0 _ _ _ _ _ EN 10025 S235JR 0.2 1.4 0.045 0.045 _ _ _ _ _ 0.01 _ _ 20Mn 0.17-0.23 0.70-1.00 0.035 0.035 0.17-0.37 0.3 0.25 0.25 20 0.17-0.23 0.60-1.00 0.03 0.02 0.17-0.37 0.25 0.25 0.25 16Mn 0.13-0.19 1.20-1.60 0.03 0.02 0.20-0.60 0.3 0.3 0.25 Material Symbol Tensile Strength, min, MPa Yield point, min, Mpa Elongation, min, % Redu...
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A figure-8 blank

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A figure-8 blank (also called a Spectacle Blind Flange) is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar. Specifications: Size: 1/2” to 60”, DN 12mm to DN 1500mm Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250 Facing: RF / RTJ Material:  Cabon steel: A105, A350 LF2 Stainless steel: A182 F304/F304L/F316/F316L/F321 Alloy steel: F11, F12 Packing: plywood case and plywood pallet Keywrods: Spectacle Blind Flanges, Spectacle Blind Flange, Spectacle Flanges, Spectacle Blind Flanges manufactory  Standards, Dimensions & Weight ASME B16.48 Class 150 ASME B16.48 Class 300 ASME B16.48 Class 600 ASME B16.48 Class 900 ASME B16.48 Class 1500 ASME B16.48 Class 2500 Key Features: Can be attached to the pipe without welding (sometimes an additional seal weld is used as well) Ideal for higher pressure and temperature applications for small pipe sizes Not recommended for larger loads, esp...
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