What is a class 125 fitting?
Class 125 fittings are a subclass of schedule 40 large diameter PVC fittings. They are a more cost effective option suited for handling fluid systems with lower overall pressure. Class 125 fittings are pressure rated up to 125 PSI, and for temperature handling, are heat rated up to 140 degrees F (60°C).
What is the difference between a 125 flange and a 150 flange?
Class 125 and Class 250 are cast iron flanges and flanged fittings while Class 150 and Class 300 are ductile iron, steel or stainless steel. 1 Class 125 flanges are made from cast iron, ANSI/ASME B16. 5 Class 150 can be made from steel or stainless and ANSI/ASME B16. 42 Class 150 is made from ductile iron.
What are flange dimensions?
Diameters and bolt circles for standard ASME B16. 5 flanges – 1/4 to 24 inches – Class 150 to 2500.
| Nominal Pipe Size NPS (inches) | Class 150 | |
|---|---|---|
| Diameter of Flange (inches) | Diameter of Bolt Holes (inches) | |
| 4 | 9 | 0.75 |
| 5 | 10 | 0.88 |
| 6 | 11 | 0.88 |
What does class mean in flanges?
The term “flange rating” (or class) refers to the maximum pressure (in psi or bars) that a flange withstands at increasing temperatures. Flanges with a higher rating (class) are stronger than flanges with lower ratings, as they bear more pressure at increasing temperatures.
What is the meaning of ANSI 150?
ANSI Class 150 establishes measures for pipe sizes. The American National Standards Institute (ANSI) Class 150 is a system of dimensional standards for weld neck, threaded, slip-on, lap joint, socket weld and blind flanges. Dimensions for facing, bolts and studs are also included in ANSI Class 150.
What is 150 lb flange?
The pressure rating of flange ranges from 150# to 2500#. The term “lb”, “class” and “#” are used interchangeably to designate the pressure rating of the flange. The fact is that 150 lb has no relation to 150 psi and so does the 300 or 600 lb does not correlate to 300 or 600 psi pressure rating.
What is a class 150 flange?
For example, a Class 150 flange is rated to approximately 270 PSIG at ambient conditions, 180 PSIG at approximately 400°F, 150 PSIG at approximately 600°F, and 75 PSIG at approximately 800°F. In other words, when the pressure goes down, the temperature goes up and vice versa.
What is a Class 150 valve?
What is Class 125 pipe?
Class 125 fittings are a subclass of schedule 40 large diameter fittings. They are a molded one piece glue fitting and are offered in 10” and 12” sizes. Class 125 fittings are pressure rated at 125 PSI and are perfect for large applications that require less pressure in the piping system.
What is the diameter of a flange?
Many flanges are simply 3 inches in diameter, which means the top and bottom are each 3 inches wide. These flanges must install on a 3-inch-diameter schedule 40 drain pipe or directly to a 3-inch closet bend.
What is an ANSI flange?
The ANSI flange is a three-part flange consisting of one flat flange, one flange machined to take a rubber O-ring and the rubber O-ring. The rubber O-ring is placed into the machined groove in one side of the flange and the assembly is tightened against the flat-faced side of the ANSI flange and secured with bolts which are…
What is a steel flange?
A flange is a forged or cast ring of steel designed to connect mechanically sections of pipe or join pipe to a pressure vessel, pump, valve or any other piece of equipment. Steel flanges provide an easy access for cleaning, inspection or modification.