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Flanges.

What Are Flanges?

Flanges are forged, disc-shaped mechanical components used to create strong, detachable connections in piping systems designed to ASME/ANSI or DIN standards. Flanges feature precision-drilled bolt holes around their circumference, allowing secure connections between pipes, valves, pumps, and pressure vessels.

Available in various types including weld neck, slip-on, socket weld, and blind flanges, they provide a reliable and practical solution for industrial piping connections.

Advantages of Flanges?

Easy maintenance and accessibility

Enables quick disassembly for inspections, cleaning, and replacement of equipment without cutting pipes or damaging the system

Versatile Applications

Compatible with various piping materials and pressure ratings, making them ideal for a wide range of industrial applications

Leak-proof & Secure Sealing

Designed to create secure, leak-tight connections while maintaining system integrity under various operating conditions.

Cost-effective & Reusable

Reduces downtime and maintenance cost by offering a reusable, long-term connection solution.

Available Variants

Blind
Slip-On
Weldneck
Socket Weld
Threaded

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CRA Trading LLC

Headquarters:
Dubai Industrial City,
Plot 5333461, Dubai UAE

CRA Inox Pipes and Fittings LLC SPC

Abu Dhabi, UAE
(ADNOC Approved,
ICV Score: 60)

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Sat: 8:30am - 4pm

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Blind

A blind flange is a solid, disk-shaped component that seals the end of a piping system. Without a central bore, it bolts to a mating flange to create a strong, removable closure. These flanges are ideal for temporary closures and capping unused pipe sections.

Slip-On

A slip-on flange features a bore larger than the pipe's outer diameter, allowing it to slide over the pipe for welding both internally and externally. This cost-effective option offers easy installation and is widely used in standard piping applications.

Weldneck

A weld neck flange incorporates a long-tapered hub that smoothly transitions from flange thickness to pipe wall thickness. Its engineered design enhances strength and optimizes flow by minimizing turbulence. The tapered neck effectively distributes stress, making it excellent for high-pressure and high-temperature systems.

Socket Weld

A socket weld flange includes a machined bore that houses the pipe. The pipe inserts into this socket against a small shoulder, maintaining a gap for thermal expansion during welding. This design creates robust connections ideal for small-diameter, high-pressure applications where threaded connections aren't appropriate.

Threaded

A threaded flange incorporates internal threads that connect directly to external pipe threads, enabling assembly without welding. While offering simple installation and replacement, these flanges are best suited for lower pressure applications and smaller pipe sizes. They're particularly useful where welding restrictions exist.

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Cap

Forged caps seal pipe ends through threading or socket welding. These components deliver exceptional pressure-bearing capacity, ideal for high-pressure systems requiring permanent or semi-permanent closure.

Nipple

A nipple is a short, double-threaded pipe section connecting fittings or components. Forged versions, typically hexagonal, provide enhanced strength for high-pressure applications.

O’let

O'lets (including weldolets, threadolets, and sockolets) are branch connection fittings that provide a reinforced outlet from a larger pipe. These fittings are designed to be welded directly to the main pipe, offering a stronger alternative to direct pipe-to-pipe branch connections.

Union

A union comprises three components - two end pieces and a central union nut - enabling pipe connection without rotation. These forged fittings prove invaluable in confined spaces where pipe movement is restricted.

Coupling

A forged coupling connects pipe sections using threaded ends or socket-weld configurations. These robust fittings ensure reliable connections in high-pressure and critical service environments.

Tee

Forged tees enable three-way connections with enhanced strength characteristics. Available with socket-weld or threaded ends, these fittings excel in high-pressure services where cast alternatives may be inadequate.

Elbow

Forged elbows provide directional changes at 45 or 90 degrees, featuring socket-weld or threaded connections. These compact, forged components deliver superior strength compared to cast versions, excelling in high-pressure, small-diameter applications.

Stub End

A stub end works in conjunction with lap joint flanges, combining a weld-prepared end with an extended flanged face. Installation involves sliding a lap joint flange over the pipe before welding the stub end, allowing flange rotation for optimal alignment. This design simplifies assembly and maintenance procedures.

Cap

A cap provides permanent closure for pipe ends through welding. This rounded fitting creates a pressure-tight seal stronger than blind flanges at equivalent pressure ratings. Caps are optimal for permanent line termination where future access isn't required.

Con & Ecc Reducer

Reducers facilitate pipe size transitions within systems. Concentric reducers align centerlines of both ends, ideal for above-centerline horizontal liquid lines. Eccentric reducers maintain one flat edge, preventing air pocket formation in below-centerline horizontal liquid lines.

Equal & Reducing Tee

A tee fitting creates three-way connections in piping systems with one inlet and two outlets. The main run maintains consistent diameter, while the branch outlet can match the main size (equal tee) or feature a smaller diameter (reducing tee). These versatile fittings efficiently distribute or merge flow paths.

90 Deg Elbow

A 90-degree elbow, known as a quarter bend, creates right-angle turns in piping systems. Available in long-radius (LR) and short-radius (SR) configurations, these fittings are industry standard. Long-radius versions minimize turbulence and optimize flow characteristics, making them preferred for most applications.

45 Deg Elbow

A 45-degree elbow directs flow at a 45-degree angle, offering gentler directional change than 90-degree alternatives. This design reduces pressure drop and flow turbulence, making it ideal for systems where space allows for gradual turns and flow efficiency is crucial.