What are the different flange standards?
The key types of flanges are the welding neck, long welding neck, slip-on, socket weld, lap joint, threaded and blind flanges. In addition to these standard flanges, some special ones exist, called Weldoflange/Nipoflange and Elboflange, swivel flange, expander/reducer flange, and orifice flanges.
What do DN and PN mean on flanges?
Nominal diameter (DN) and nominal pressure (PN)
What is PN rating of flanges?
‘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 as2129?
1.1 SCOPE This Standard specifies requirements for circular flanges of nominal sizes DN 15 to DN 3000, inclusive, and their bolting for use on pipes, valves, fittings and other pressure-retaining equipment containing fluid at pressures up to 19300kPa and at temperatures in the range −200°C to +525°C.
How do I choose a flange?
Guidelines for Selection of Various Types of Flanges (PDF)
- Pressure Temperature Rating of Flanges.
- Flange Dimensional Standards.
- Flange Facings.
- The bore of Welding Neck Flanges and Hub Design.
- Flange Material Limitations.
- Iron Flanges.
- Carbon Steel Flanges.
- Low and Intermediate Alloy Steel Flanges.
What does DN40 mean?
Nominal Diameter
English term or phrase: DN40. Selected answer: Nominal Diameter (the number is the approximate bore diameter measured in millimetres)
What is PN in pressure rating?
PN is an acronym for “Pressure Nominale”. The PN is used as a prefix to the pressure rating of the Flanges. For example, the flange PN16 is designed to operate at up to 16 levels. Normal scores: PN6, PN10, PN16, PN25, PN40, PN64, PN100.
How do I choose a flange rating?
Share with: The flange rating or class refers to the maximum pressure that a flange withstands at the increasing temperatures. Flanges with a higher rating are stronger than the flanges with a lower rating, which means 600# flanges can bear more pressure than 150# flanges.
What B16 5?
B16. 5 is limited to flanges and flanged fittings made from cast or forged materials, and blind flanges and certain reducing flanges made from cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding flange bolting, flange gaskets, and flange joints.
What does PN 10 16 mean?
What materials are used in manufacturing of Australian pipe flange standards?
Materials used in Manufacturing of Australian Pipe Flange Standards (AS/NZS 4331.1) includes Stainless Steel (SS), Hastelloy, Monel, Inconel, Titaniun, Duplex Steel, Nickel Alloy, Super Duplex Steel, Incoloy, Alloy 20, 254 SMO, Copper Nickel, Carbon Steel (CS), Alloy Steel, Aluminium, Bronze, Mild Steel (MS), Brass.
What is as 2129 flanges?
AS 2129 Australian Standard Flanges for pipes, valves and fittings SECTION 1 SCOPE AND GENERAL 1. 1 SCOPE This Standard specifies requirements for circular flanges of nominal sizes DN 15 to DN 3000, inclusive, and their bolting for use on pipes, valves, fittings and other.
What is the most common flanging used in Australia?
The most common flanging used in Australia in oil, gas and mining is now ANSI flanging to ANSI B16.5. However in general industrial, commercial and waste/water industries AS2129 Table flanging is the most common. Increasingly European PN rated flanges are also specified in BS4504 as well as AS4331 and EN 1092-1.
What is a Class 300 steel flange?
Forged steel flanges, ASME B16.5, are made in seven primary ratings: 150Lbs – 300Lbs – 400Lbs – 600Lbs – 900Lbs – 1500Lbs – 2500Lbs 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.