Elbow and Different Types of Elbows

The elbow is the fitting that is used the most out of all of them. To put it simply, when a pipe changes direction, the elbow, or ell, is used. Elbows can turn in any direction, including up, down, left, and right.

Different Types of Elbows

1. 90° ELBOWS
   • Long-Radius Elbow
   • Short-Radius Elbow
2. 45° ELBOWS
   • Long-Radius Elbow
   • Short-Radius Elbow
3. Mitered Elbows
4. Reducing Elbows

90° Elbows

• A 90-degree elbow is a type of pipe fitting designed to join two sections of pipe or tubing at a right angle.
• Commonly manufactured from materials such as copper, stainless steel, carbon steel, or PVC, these fittings are widely used in Industrial Piping, plumbing and HVAC systems to redirect the flow of water or other fluids.
• By altering the direction of flow, a 90-degree elbow helps minimise leaks, maintain consistent pressure, and promote smooth fluid movement throughout the system.
• Proper installation of this component can significantly extend the lifespan of the piping infrastructure and enhance overall system efficiency.

Long Radius

• Long radius (LR) elbows have a centre-to-end distance, or takeout, that equals 1.5 times the nominal pipe diameter (D).
• For instance, a 2-inch LR elbow has a takeout of 3 inches, while a 36-inch elbow has a takeout of 54 inches.
• These elbows are typically available in 90° and 45° angles.

Short-Radius Elbow

• Short radius (SR) elbows are generally only used where space constraints prevent
• The use of long radius elbows.
• They are only available in 90° bend configurations, but could be cut on an angle for use as a 45° or other angled SR elbow.

45° Elbows

• Another significant fitting is the 45° elbow.
• This elbow is also utilised to alter the direction within the piping system.
• The clear distinction between the 90° and 45° elbows is the angle created by the bend.
• Since the 45° elbow is half of a 90° elbow.
• Unlike the 90° ell, no formula can be applied to establish the centre-to-end dimension of the 45°.

• The last 90° elbow we will mention is the mitered elbow.
• The mitered elbow is not an actual fitting, but instead is a manufactured turn in the piping system.
• This elbow is made by making angular cuts in a straight run of pipe and then welding the cuts together after they have been rolled to a different angle.
• The mitered ell may be classified as one, two, three, or four weld miters.
• The number of welds used depends on the smoothness of flow required through the turn.
• A two-weld miter will create more turbulence within the pipe than will a four-weld miter.

Reducing Elbows

• A reducing elbow is a specialty pipe fitting used to join pipes of varying sizes and to alter the direction of flow.
• It facilitates the transition from a larger pipe size to a smaller one (or vice versa) without the need for separate fittings for reduction and bending.
• It is typically used in pipelines that require a turn, most commonly 90 degrees.
• Because of its dual purpose, minimizing elbows is very helpful in complicated or space-constrained pipe layouts, particularly in industrial systems like water treatment facilities, chemical plants, and oil refineries.
• In order to accommodate varying pressure and temperature conditions, they are frequently made from materials like copper, carbon steel, stainless steel, or other alloys.
• Reducing elbows adhere to industry standards like ASME B16.9 to guarantee dependability and structural integrity, and they come in both seamless and welded versions.
• By lowering the number of joints in a system, their use helps to minimise turbulence, pressure loss, and leakage sites.