What does ANSI 150 mean?

What is the difference between ANSI 125 and ANSI 150?

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. Hence, ANSI/ASME B16. 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.

What pressure is a 150 flange rated for?

As temperature increases, the pressure rating of the flange decreases. 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.

What is ANSI class rating?

What is an ANSI Class Rating? The ANSI Class rating of a flange is defined as the maximum amount of pressure that the flange can withstand at increasing temperatures. There are seven primary pressure classes for flanges. They are 150, 300, 400, 600, 900, 1500, and 2500.

What does a 150 lb flange mean?

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.

How is flange rating calculated?

Flange ratings are in accordance with ASME B16. 5. In this standard, flanges are classified based on their pressure-temperature rating which is also known as a flange class. The pound rating (i.e. 150#) denotes that 150 pounds per square inch is the maximum allowable working pressure of that flange.

What is a Class 250 valve?

The NIBCO® cast iron Class 250 gate valve provides full flow with minimal pressure drop. The cast iron gate valve features a Class 250 flanged, raised face end connection for easy installation and accessibility.

What is the difference between Class 150 and 300 flange?

A Class 300 flange is rated to a higher pressure than a Class 150 flange, because a Class 300 flange is constructed with more metal and therefore can withstand more pressure. However there are a number of factors that can impact the pressure capability of a flange.

What is ANSI pressure rating?

ANSI FLANGE PRESSURE RATING EXPLAINED



Pressure rating is defined as the maximum allowed pressure that a flange can withstand at increasing temperatures. According to the ANSI/ASME B16. 5 specification, there are seven flange pressure ratings: 150, 300, 400, 600, 900, 1500, and 2500.

What does class 125 flange mean?

1 Class 125 flange is rated for 125 psi at 353ºF (178ºC), which is the boiling temperature for water at that pressure. As temperature increases, the pressure rating of the flange decreases.

Are 300 and 600 flanges the same?

Different Pressure Classes for Flanges



The difference between these three flanges is the pressure class! This is a class 150, this is a class 300, and this is a class 600. The differences are in the dimensions except for the bore!

What does ANSI stand for?

American National Standards Institute – ANSI Home.

How many ANSI standards are there?

There are more than 10,000 ANSI standards – ANSI standards are everywhere. In addition to publishing ANSI standards in the U.S., ANSI is also involved with coordinating U.S. standards with international standards so that products can be used worldwide.

What is the difference between Series A and B flanges?

ASME B16 47 Series A flanges are thicker, heavier and stronger than their Series B counterparts. They also can often handle more external loading than Series B. Series A flanges tend to be more costly than Series B flanges.

What is flange slang for?

Flange definition



(vulgar slang) A vulva. noun. 3. 1. A protruding rim, edge, rib, or collar, as on a wheel or a pipe shaft, used to strengthen an object, hold it in place, or attach it to another object.