Elbow Pipe Specification
- Material: carbon steel, stainless steel, alloy steel
- Standards: ANSI, ASME B16.11, ASME B16.9, and UL/FM certified
- Test: hydrostatic, ultrasonic, radiographic.
- Surface: epoxy coating, smooth, anti-corrosive coatings.
The Key Role of Pipe Elbow
What Is an Elbow in a Pipe
Elbow pipes are also known as elbow pipe fittings. The function of these pipe fittings is to change the direction of fluid flow within a piping system. They connect two sections of pipe, allowing the fluid to smoothly and steadily change direction.
Elbow Pipe / Elbow Fitting Supply
FireMinus offers a variety of elbow pipe fittings to meet the diverse functional requirements of your project. Generally, the degrees of elbow pipes can be categorized into 90 degree elbows, 45 degree elbows, 22.5 degree elbows, etc., which are common degrees. These different degrees of elbows can meet the needs of various fluids. Elbow fittings are widely used in industries such as oil and gas, air conditioning systems, and fire protection. These pipe fittings come in various types and specifications, each with its unique features, and are indispensable components for the performance and safe operation of pipe systems.
Metal Materials for Pipe Elbows
The material of pipe elbows has a great impact on their corrosion resistance and temperature resistance. Here are several common metal elbow pipe material.
- Carbon steel: carbon steel elbow pipe is one of the most common materials. It has excellent strength and pressure resistance, common grades such as 20 #, Q235, A106 Gr. Carbon steel material is used in oil, natural gas, steam, hydraulic and other non-strong corrosive media transportation piping.
- Stainless steel: the biggest advantage of the elbow pipe made of stainless steel is that it has strong corrosion resistance and high temperature oxidation. For example, 304 stainless steel, 316 stainless steel and 316L stainless steel. Because of the addition of molybdenum in the 316 stainless steel material, which enhances the stronger resistance to pitting corrosion. Stainless steel material elbow pipe is mainly used for food, pharmaceutical and other applications that require high corrosion resistance.
- Alloy steel: alloy steel material elbow pipe to meet the needs of special environments. For example, in the high-temperature and high-pressure environment, such as P91, P92 and other materials, used in boiler piping more.
- Other metals: such as copper, aluminum alloys, etc., are mostly used in specific industries, such as refrigeration, ships or certain decorative piping projects.
Angle of Elbow Pipe - 45° Elbow, 90° Elbow, 180° Elbow
- 45° elbowpipe: gentle turn, less fluid resistance, less impact on the pressure drop of the piping system. Commonly used in the need for a certain angle adjustment but not too drastic occasions.
- 90° elbowpipe: 90° elbow is the most commonly used type of elbow, which can realize a right-angle turn, space-saving, compact layout. It is the most frequent type in various piping systems.
- 180 ° elbowpipe: can realize the complete reversal of the turn, often used in the need to return to the pipeline layout, or installed in the pump outlet, etc. as a “sharp stop” to alleviate the water hammer effect.
- Special degree elbowpipe: according to specific design drawings can also have 30 °, 60 ° and other non-standard angle of the elbow, but this borrowed angle of the elbow is used less, the need for special customization.
Steel Elbow Types & Dimension Summary Chart
Common elbow pipe fitting sizes:
- Grooved elbows typically range from 1/2 inch to 12 inches.
- Welded elbows have the widest range, up to 48 inches.
- Socket weld and threaded elbows are typically smaller, up to 4 inches.
Elbow Type | Degree | Diameter Range (inches) | Connection Type | Bend Radius | Pressure Rating |
Grooved X Female Threaded Adapter Elbow | 90° | 1/8″-100″ | Grooved end + Female threaded end | – | 150-300# |
Grooved 90° Reducing Elbow With Female Threaded Outlet | 90° | Outside diameter tolerance: ±0.01~0.03 inches | Grooved end + Female threaded end | – | 150-300# |
American Butt Weld 45° Elbow | 45° | 1/2″-48″ | Butt Weld | Long Radius (1.5D) | SCH10-SCH160 |
American Butt Weld 90° Elbow (Long Radius) | 90° | 1/2″-48″ | Butt Weld | Long Radius (1.5D) | SCH10-SCH160 |
American Butt Weld 90° Elbow (Short Radius) | 90° | 1/2″-24″ | Butt Weld | Short Radius (1.0D) | SCH10-SCH160 |
American Socket Weld 45° Elbow | 45° | 1/8″-4″ | Socket Weld | Long Radius (1.5D) | 3000-6000# |
American Socket Weld 90° Elbow | 90° | 1/8″-4″ | Socket Weld | Long Radius (1.5D) | 3000-6000# |
American Threaded 45° Elbow | 45° | 1/8″-4″ | Threaded | Long Radius (1.5D) | 2000-3000# |
American Threaded 90° Street Elbow | 90° | 1/8″-2″ | Male/Female Threaded | Short Radius (1.0D) | 2000-3000# |
Grooved 11.25° Elbow | 11.25° | 1/2″-12″ | Grooved | – | 150-300# |
Grooved 22.5° Elbow | 22.5° | 1/2″-12″ | Grooved | – | 150-300# |
Grooved 45° Elbow | 45° | 1/2″-12″ | Grooved | – | 150-300# |
Grooved 90° Drainage Elbow | 90° | 1/2″-6″ | Grooved | – | 150# |
Grooved 90° Elbow | 90° | 1/2″-12″ | Grooved | – | 150-300# |
Grooved 90° Fire Hydrant Elbow | 90° | 4″-12″ | Grooved | – | 300# |
Grooved 90° Reducing Elbow | 90° | DN15 (1/2“) to DN200 (8”) | Grooved | – | 150-300# |
Elbow Pipe FAQ
What is the difference between a bend and an elbow in plumbing?
Although both elbows and bends can be used to change the direction of fluid flow in a piping system, they have fundamental differences.
Bends are field-fabricated fittings suitable for low-pressure or high-flow systems. Their bending radius can be flexibly adjusted, and the degree can be turned to any desired direction.
Elbows are pre-fabricated standard fittings suitable for high-pressure applications. They have fixed bending radii, such as long radius 1.5D and short radius 1.0D. Degrees include 45-degree elbows, 90-degree elbows, etc., and cannot be adjusted to any arbitrary degree.
What is a tee in plumbing?
A tee has an appearance resembling the letter “T,” hence its name. As a pipe fitting, the tee is a critical component in piping systems used for diverting or merging flows. It can alter the distribution ratio of fluids. A tee features a main pipe interface in the horizontal direction and branch pipe interfaces in the vertical direction. Depending on their connection methods, tees can be categorized into threaded tees, flanged tees, socket weld tees, butt weld tees, groove tees, and others.
