What is the difference between ASME and ANSI flanges?

What is the difference between ASME and ANSI flanges?

ANSI Flanges are manufactured based on standards developed by organizations and ASME Flanges are based on codes and standards for mechanical devices. The ANSI Flanges are designed based on approx. 9500 standards whereas ASME Flanges manufactured on 600 codes and standards for different mechanical devices.

What is an ANSI flange?

“ANSI class” is the designation for pressure-temperature ratings of pipe flanges. In its denotation, the word Class is followed a by dimensionless number. This includes Class 150, 300, 400, 600, 900, 1500, and 2500.

What is ansi150?

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.

What pressure is a 300 flange rated for?

570 psi
the class 300 flange (bigger and stronger, but with the same bore size) withstands 570 psi at the same temperature of 600 degrees F° finally, a class 2500 flange of the same size bears 34 times more pressure than the class 150 rated flange, reaching a whopping 4730 psi rating at 600 F°!

What is the difference between ASME and API?

The difference between ASME/ANSI and API is the fabrication material and a higher rated API operating pressure. ASME/ANSI flanges are commonly used in industrial process systems handling water, steam, air and gas. In the old API standard, flanges ranged from 1 1/2 to 10(20) inches.

What does PN stand for on flanges?

Pressure Nominale
‘PN’ stands for Pressure Nominale and prefixes the pressure rating, e.g. a PN16 flange is designed to operate up to 16 bar. Typical ratings include PN6, PN10, PN16, PN25, PN40, PN64, PN100. The American ANSI standard refers instead to a pressure / temperature rating termed ‘Class’.

What is an ISO flange?

ISO HV Flanges (also called Large ISO) have a sexless design and are made from 304L stainless or aluminum. Each flange face is counter-bored or grooved to receive a metal centering ring with an elastomeric o-ring around its O.D. As with KF, the ISO centering ring both aligns the flanges and holds the o-ring in place.

What is a flange used for?

A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal.

Is API a standard or code?

API was formed in 1919 as a standards-setting organization and is the global leader in convening subject matter experts across segments to establish, maintain, and distribute consensus standards for the oil and gas industry.

What is a flange class?

Flange class is a combination of pressure-temperature rating that defines maximum allowable working gauge pressure of the flange. Here pressure is in a bar & the temperatures in degrees Celsius . Based on this calculation, flanges are available in 150#, 300#, 400#, 600#, 900#, 1500# and 2500#.

Is ANSI flange equal to ASME flange?

The ANSI and ASME terms are most common in metal industries. But many people still don’t know the exact difference between ANSI and ASME. They thought that both ASME & ANSI Flanges are the same and there is no difference between them. But that’s not right. In this article, we clearly understand the difference between ANSI and ASME Flanges.

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…