PVC (polyvinyl chloride) pipe is a widely used pipe material. It is widely used in construction, industry, agriculture and other fields because of its lightness, corrosion resistance and high strength. Among them, SCH 80 PVC pipe fittings are a special category of PVC pipe fittings. Because of its thicker wall and stronger pressure bearing capacity, it is usually used in occasions that require high strength. This article will analyze SCH 80 pvc pipe fitting dimensions and related applications in detail to help users better understand and use this material.
What are SCH 80 PVC pipe fittings?
SCH 80 stands for “Schedule 80” and refers to the wall thickness grade of the pipe. In PVC piping systems, SCH 80 pipes are widely used in high-pressure liquid or gas delivery systems because of their thicker wall and stronger pressure-bearing capacity than standard SCH 40 pipes.
SCH 80 PVC pipe fittings generally include the following types:
Elbows
Tees
Couplings
Flanges
Ball Valves
Caps
These fittings are used to connect, turn, branch or close pipe systems. The size of the fittings directly affects the compatibility and performance of the system.
SCH 80 pvc pipe fitting dimensions
1. Definition of size
The size of SCH 80 PVC pipe fittings is expressed in “nominal pipe size” (NPS) and wall thickness. The nominal diameter refers to the standard size of the pipe fitting, which is not completely equal to the actual inner diameter or outer diameter of the pipe fitting. The wall thickness of the pipe fitting increases with the increase of the nominal diameter, so as to ensure that the pipe fitting can withstand higher working pressure.
2. Size range of common pipe fittings
The nominal diameter of SCH 80 PVC pipe fittings is generally between 1/2 inch (DN15) and 24 inches (DN600), and the specific sizes are as follows:
| Nominal diameter（NPS） | Outer diameter（OD） | Wall thickness | Inner diameter（ID） |
| 1/2 inch | 0.84 inch | 0.147 inch | 0.546 inch |
| 1 inch | 1.315 inch | 0.179 inch | 0.957 inch |
| 2 inch | 2.375 inch | 0.218 inch | 1.939 inch |
| 4 inch | 4.5 inch | 0.337 inch | 3.826 inch |
| 6 inch | 6.625 inch | 0.432 inch | 5.761 inch |
| 12 inch | 13.8 inch | 0.687 inch | 12.426 inch |
3.Pipe type and size
Here are some common SCH 80 pvc pipe fitting dimensions:
Elbows
The dimensions of 45° and 90° elbows vary according to the nominal diameter, radius of curvature and port length.
The length of a 1/2-inch elbow is about 1.5 inches, and the length of a 24-inch elbow can reach more than 16 inches.
Tees
The main stem of a tee is usually the same size as the branch pipe, but it can also be customized with a reducing diameter (such as 1″ x 3/4″ x 1″).
A 6-inch tee is about 12 inches long, and a 24-inch tee can be over 36 inches long.
Flanges
The outer diameter and number of bolt holes of a flange are determined by the nominal diameter.
For example, a 4-inch flange has an outer diameter of 7.5 inches and eight bolt holes.
Couplings
The length of couplings is generally 2-3 times the nominal diameter.
For example, a 2-inch straight coupling is about 4 inches long.
Caps
The size of the cap is the same as the outer diameter, and the wall thickness is the same as the pipe. It is used to close the end of the pipe.
Pressure ratings for SCH 80 PVC fittings
The pressure ratings for SCH 80 PVC fittings depend on their size and temperature conditions. Typically, at room temperature (73°F/23°C), small-sized fittings (such as 1/2-inch) can withstand pressures up to 850 psi, while larger-sized fittings (such as 12-inch) have a relatively lower pressure capacity of around 150 psi.
It is important to note that the pressure capacity of PVC fittings decreases as the temperature increases. For example, when the temperature increases to 140°F (60°C), the pressure capacity may decrease by about 50%.
Application areas of SCH 80 PVC pipe fittings
1. Industrial pipelines
SCH 80 pipe fittings are used in high-pressure pipeline systems in industries such as chemical, oil and gas, especially when conveying corrosive liquids or gases.
2. Water treatment systems
In water treatment systems, SCH 80 PVC pipe fittings are often used to convey acidic or alkaline solutions due to their chemical corrosion resistance.
3. Agricultural irrigation
Agricultural irrigation systems require high-pressure and corrosion-resistant pipe fittings. SCH 80 PVC pipe fittings can meet these needs, especially for large-scale irrigation equipment.
4. Water supply and drainage systems
In the field of building water supply and drainage, SCH 80 pipe fittings are used as high-strength pipes that can withstand higher water pressures.
SCH 80 PVC pipe fittings vs. other pipe fittings
Compared to other pipe fittings (such as SCH 40 PVC pipe fittings or metal pipe fittings), SCH 80 PVC pipe fittings have the following advantages:
Greater wall thickness, able to withstand higher pressures.
Excellent chemical resistance, suitable for the transportation of corrosive liquids or gases.
Lightweight design, easy to transport and install.
Lower cost, more economical than metal pipe fittings.
However, SCH 80 PVC pipe fittings are more rigid and less flexible, and are not suitable for systems that require frequent bending or severe vibration.
Notes
1. Choose size according to pressure requirements
Make sure the selected pipe fittings can withstand the maximum working pressure of the pipeline system.
2. Check temperature limits
If the system operates at a high temperature, consider the impact of temperature on pressure tolerance.
3. Pay attention to the connection method
Different pipe fittings have different connection methods, such as threaded connection, flange connection or adhesive connection, and the appropriate type needs to be selected according to the application scenario.
SCH 80 PVC pipe fittings are ideal for many high-strength pipeline systems due to their high wall thickness and strong pressure-bearing capacity. Understanding its size specifications, pressure ratings and application areas is essential for correct selection and installation. When purchasing, you should choose the appropriate specifications and types based on actual needs, such as pipeline pressure, temperature and medium characteristics. In short, SCH 80 PVC pipe fittings have an irreplaceable position in the fields of industry, construction and agriculture due to their excellent performance and diverse size options.
