Flanges
Pipe Flanges are an integral part of piping used to join two consecutive pipes or rather block to end the pipeline. A pipe flange is either a ring type, collar or a circular blank disc either welded or screwed to the pipe. Flanges are used in pairs connected by bolted joint and provides strength to the pipeline. A flanged joint is second most used method of joining after welding and is versatile in terms of maintenance.
Ferrobend manufactures complete range of flanges from ½ up to 100 Inch nominal sizes for pipeline connections, primarily in Alloy Steel, Carbon Steel, Stainless Steel, Titanium & Nickel alloy grades. We produce forged flanges & plate flanges to ANSI, ASME, API, AWWA, SAE, BS, JIS, BIS, SABS, EN, DIN and GOST Standards.
Types of Flanges
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Weld Neck Flange
Pipe flange with a high hub often called as a neck that is used to weld the pipe. This pattern transfers the stress on to the pipe thus handling high pressure service.
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Slip On Flange
Ring type pipe flange which slips over the pipe and welded. The inside diameter of the pipe is slightly large than the pipe's outer diameter.
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Socket Weld Flange
Ring type pipe flange with recessed groove which acts as a socket and holds the plain end of the pipe. Typically used for smaller diameter and high pressure lines.
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Threaded Flange
Pipe flange similar to slip on flange but with female tapered threads at the bore to suit incoming pipe threads. Threaded flange is used for small diameter high pressure lines
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Lap Joint Flange
Lap joint flange are exactly similar to slip on flange but with radius cut over the bore to occupy and facilitate free revolution of the stub end fitting
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Blind Flange
A pipe flange as circular plate with all relevant bolt holes but no center bore, paired with any other type of pipe flange to block or terminate the pipeline.
Others
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Weldo Flange
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Nipo Flange
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Swivel Flange
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Long Weld Neck Flange
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Nozzle Flange
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Reducing Flange
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Expander Flanges
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Custom Flanges
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Types of Flange Facings
Flange Companions
Flange Standards
ANSI B16.5
This standard covers dimensions and tolerance for pipe flanges in ½" to 24" NPS from pressure class 150 to 2500 lbs across various flange types such as Slip-On, Weld Neck, Threaded or Screwed, Socket Weld, Lap Joint and Long Welding Neck flanges.
ASME B16.36
This standard covers dimensions and tolerance for pipe flanges, similar to ANSI B16.5 and having orifice pressure differential connections.
ASME B16.47 Series A
This standard covers dimensions and tolerance for large diameter pipe flanges from 26 to 60 inch NPS in Class 150, 300, 400, 600 and 900 lbs pressure ratings.
ASME B16.47 Series B
This standard covers dimensions and tolerance for large diameter pipe flanges from 26 to 60 inch NPS in Class 75, 150, 300, 400, 600 and 900 lbs pressure ratings.
API 6A
This standard covers high-pressure flanges, commonly used in surface drilling and production. API 6A covers flanges in type 6B & 6BX from 2000 psi to 20000-psi pressure ratings.
API 17D
This standard covers SS and SV flanges used for subsea applications.
API 605
This standard is equivalent to ANSI-ASME B16.47 Series B, covering large diameter flanges from 26 to 60 NPS in class 75, 150, 300, 400, 600 and 900 lbs pressure ratings.
AWWA C207
This standard covers ring type, hub type and blind flanges from 4 to 50 inch NPS, commonly used for water pipe line connections. Covers flanges across type B, D, E, & F tables.
SAE J518
This standard covers complete dimensions specification for flanged heads and split flange clamp halves applicable to 4 bolt split flange type tube, pipe and hose connections. SAE J518 specification is further classified into code 61 & code 62 flanges.
BS 10
This standard covers dimensions for plain, boss, integrally cast or forged and weld neck type flanges, from ½ to 24 inch NPS, covered under Table D, E, F & H of BS 10 specification.
Flange Standards
BS 1560
This standard covers circular flanges for pipes, valves and fittings from size ½ to 24 inch NPS. Flange dimensions covered by BS 1560 specification are similar to ANSI B16.5 class 150 and 300 lbs.
BS 3293
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BS 4504
This standard covers circular plate type, weld neck, blind and threaded flanges for pipes, valves and fittings from sizes DN10 up to DN2000 in PN2.5, PN6, PN10, PN16, PN25, PN40 pressure ratings.
JIS B2220
This standard covers dimensions for slip-on and blind flanges from size DN 400 up to DN 1000 in 5K, 10K, 16K & 20K pressure ratings.
IS 6392
This standard covers dimensions for cast, forged and plate flanges or flat steel pipe flanges for use in industry for oil, water, steam, air, gas and chemical services. IS 6392 covers integral, welding neck, plate, screwed boss, slip-on boss, loose flanges and blind/blank flanges.
SANS / SABS 1123
This is a South African National standard for flanges used with pipes, valves and fittings. SABS 1123 covers dimensions and tolerance for welding neck, slip on, threaded / screwed, slip-on boss and blind flanges in 600kPa, 1000kPa, 1600kPa, 2500kPa and 4000kPa pressure ratings.
EN 1092-1
This standard covers dimensions, tolerances and other requirements for circular steel flanges for pipes, valves and fittings in PN designation PN 2.5 to PN 400 and nominal sizes from DN10 up to DN4000.
DIN Flanges
DIN has developed many specification standards for flanges covering large variety of steel flanges for used with pipes, fittings and valves. Click on the link to know more standards for different types of flanges including welding neck, slip-on, threaded, long weld neck, loose plate flange, slip-on hub flange and blind flanges.
GOST 12820
This Russian standard covers dimensions and tolerance for Steel Plane / Slip-on flanges used with pipes, fittings and valves from 0.1 to 2.5 MPa pressure ratings.
GOST 12821
This Russian standard covers dimensions and tolerance for Steel Weld Neck flanges used with pipes, fittings and valves from 0.1 to 2.5 MPa pressure ratings.