Ferrobend manufactures and supplies premium quality Flat Face Slip-On Flanges (FF) designed for reliable and secure connections in industrial piping systems. Featuring a flat gasket seating surface and a slip-on design for easy pipe installation, FF Slip-On Flanges provide reliable sealing, dimensional accuracy, and long-term performance across water treatment, low-pressure piping, cast iron, lined piping, and general industrial applications.
A Flat Face Slip-On Flange (FF SO Flange) is a pipe flange designed for applications where uniform load distribution and compatibility with sensitive equipment are important. Its flat gasket seating surface allows the flange to slide over the pipe before being secured with internal and external fillet welds, providing a practical and economical piping connection.
The flat face design accommodates a full-face gasket and helps distribute bolt load more evenly across the flange surface. This makes Flat Face Slip-On Flanges particularly suitable for cast iron equipment, FRP piping, plastic piping, and other systems where excessive localized flange loading should be avoided.
They are commonly used in low-pressure and general industrial piping applications, subject to the applicable pressure class, material, and service conditions.
Slip-on design allows the flange to slide over the pipe before welding.
Flat face helps distribute bolt load more evenly across the flange surface.
Suitable for cast iron, FRP, PVC, and HDPE piping systems where localized loading should be minimized.
Simple construction provides a cost-effective option for suitable industrial and utility piping applications.
Internal and external fillet welds secure the flange to the pipe for reliable service.
Flat Face Slip-On Flanges are preferred for piping systems where easy installation, uniform load distribution, and compatibility with sensitive equipment are important. Their flat face and full-face gasket arrangement make them particularly suitable for cast iron, FRP, plastic, and other non-metallic piping systems where excessive localized flange loading should be avoided.
The Flat Face Slip-On Flange (FF SO Flange) is designed for practical strength, reliable sealing, and easy installation in suitable piping applications. Its slightly oversized bore allows the flange to slide over the pipe before being positioned and secured with internal and external fillet welds.
The flat face is precision machined to accommodate a full-face gasket, helping distribute bolt load more evenly across the flange surface and reduce localized loading on sensitive equipment. Depending on the product specification, the flange may be manufactured through forging, plate fabrication, or machining, followed by precision machining for accurate bore dimensions, bolt hole positioning, and surface finish.
Heat treatment, when specified by the material grade or applicable standard, helps achieve the required mechanical properties. This construction provides a practical balance of strength, equipment compatibility, and cost efficiency for water treatment, HVAC, building services, and general industrial piping.
Flat Face Slip-On Flanges (FF) offer a practical and economical solution for low-pressure piping systems, particularly where easy installation, reliable sealing, and equipment protection are important. Their flat sealing face helps distribute bolt load evenly across the gasket, making them suitable for connections involving cast iron, PVC, FRP, and other brittle equipment. The slip-on design also allows easy pipe alignment and installation, making these flanges widely used in water, HVAC, utility, and general industrial piping applications.
The slip-on design allows the flange to slide over the pipe, simplifying installation and alignment.
The flat face (FF) is well suited for cast iron, PVC, FRP, and other equipment where excessive bolt stress can cause damage.
Provides a uniform gasket seating surface and works effectively with full-face gaskets for dependable sealing.
Offers a cost-effective alternative to weld neck flanges for low-pressure and utility piping systems, including Class 150 applications.
Commonly used in water supply, HVAC, utility lines, chemical services, and general low-pressure piping systems.
Ferrobend manufactures Flat Face Slip On Flanges in a comprehensive range of Stainless Steel, Carbon Steel, Alloy Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, Nickel Alloys, Titanium, Copper Alloys, and other special engineering materials for demanding industrial applications.
304 • 304L • 316 • 316L
321 • 347 • + More Grades
A105 • LF2 • A350
A694 • A516 • + More Grades
F5 • F9 • F11 • F22
F91 • F92 • + More Grades
F51 • F60 • F52
F44 • S31803 • + More Grades
F53 • F55 • F61
S32750 • S32760 • + More Grades
200 • 201 • 625
825 • C276 • + More Grades
Inconel • Monel • Hastelloy
Incoloy • Alloy 20 • + More Grades
C70600 • C71500 • Brass
Bronze • Cu-Ni • + More Grades
Grade 2 • Grade 5 • Grade 7
Grade 12 • Grade 23 • + More Grades
Shaped by heating a solid billet and compressing it under high pressure, aligning the grain flow for superior strength and pressure resistance.
Billet progressively shaped by rotating rollers, giving a uniform grain structure and high fatigue resistance.
Machined directly from a flat metal plate without forging — a cost-effective option for low-pressure or non-critical applications.
Our products are tested and certified as per international quality standards with complete traceability and documentation.
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