A Class flange can handle more pressure than a Class flange, because a Class flange are constructed with more metal and can withstand more pressure. However, there are a number of factors that can impact the pressure capability of a flange. The Pressure Class or Rating for flanges will be given in pounds.
Flanges are used when joints need dismantling. It Provides flexibility for maintenance.
Flange Connects the pipe with various equipment and valves. Breakup flanges are added in the pipeline system if regular maintenance in required during plant operation.
A flanged joint is composed of three separate and independent although interrelated components; the flanges, the gaskets, and the bolting; which are assembled by yet another influence, the fitter.
Special controls are required in the selection and application of all these elements to attain a joint, which has acceptable leak tightness.
However, it is not advisable to used flange connection in underground piping when it supposed to be buried. The flange is also a most common source of leak and fire in a process plant.
There are variety of flanges available to suit the requirements. Flanged can be classified in several alternate ways as follows: This type of joint connection is Speedy and simple but not suitable for high presser and temperature applications.
Threaded Flanges are mostly used in utility services such as air and water.
Ring Type Joint gaskets. Ring Type Joint gaskets are metallic sealing rings, suitable for high-pressure and high-temperature applications. They are always applied to special, accompanying flanges which ensure good, reliable sealing with the correct choice of profiles and material. One Company. One Call. Total Solution.. Residential Vent Systems. Residential Chimney Systems. Manufacturer of Flanges as per Standard - Flanges, DIN Flanges, BS Flanges and JIS Flanges offered by Excel Metal & Engg Industries, Mumbai, Maharashtra.
Fillet welding is done from outside on the pipe. Generally, it is used in small bore piping and only suitable for low pressure and temperature application. Slip-On Flanges Slip-On flange has a hole with matching outside diameter of pipe from which pipe can pass.
The flange is placed on pipe and fillet welded from both inside and outside. Slip-On Flange is suitable for low pressure and temperature application. This type of flange is available in large size also to connect big bore piping with storage tank nozzles.
Normally, these flanges are of forged construction and are provided with the hub. Sometimes, these flanges are fabricated from plates and are not provided with the hub.
Lap Joint Flanges Lap flange is having two components, a stub end, and a loose backing flange. Stub end is butt welded to the pipe and Backing flange freely move over the pipe. The backing flange can be of different material than stub material and normally of the carbon steel to save the cost.
Lap flange is used where frequent dismantling is required, and space is constrained. Weld Neck Flanges Weld neck flange are most widely used flanged in process piping.
It gives the highest level of joint integrity due to Butt-welded with a pipe. These types of flanges are used in high pressure and temperature application. Blind Flanges The blind flange is a blank disc with bolt hole.
These types of flanges are used with another type of flange to isolate the piping system or to terminate the piping as an end.
Blind flanges are also used as a manhole cover in the vessel.The flange is second most used joining method after welding. Flanges are used when joints need dismantling. It Provides flexibility for maintenance. ISO norm defines Nomimal Pressure for pipe components.
API 6D compares also ANSI Class with PN. The pressure rating on this table do not mean design pressure (bar or psi). Dimensions of PN 10 Flanges EN NOTE 1: Dimensions N1, N2 and N3 are measured at the intersection of the hub draft angle and the back face of the flange. Manufacturer of Flanges as per Standard - Flanges, DIN Flanges, BS Flanges and JIS Flanges offered by Excel Metal & Engg Industries, Mumbai, Maharashtra.
One Call. Total Solution.. Residential Vent Systems. Residential Chimney Systems. The concept of flange ratings likes clearly. A Class flange can handle more pressure than a Class flange, because a Class flange are constructed with more metal and can withstand more pressure.