Pipe flanges are used at places where piping, instruments, valves, equipment etc. It is of pressure energized seal in radial direction, one special kind of octagonal metal ring gaskets. Ring type joint flange, stainless steel rtj flanges, rtj flange. This jointing method can be employed on weld neck, slipon and blind flange. The compress flange wizard is a tool that creates optimized appendix 2 flange designs with minimal time and effort. Noble model m12pi a ring type joints with ptfe inserts m12 model rx ring type joints. The rotation of the flange, or the corresponding rigidity of the flange, maybe a. The rtj flange dimensions vary with the specifications and standards of the piping that uses the flanges. A flange joint is a connection of pipes, where the connecting pieces. Table 1 flange gasket materials, type and thickness flange class working pressure nominal pipe diameter thickness psi kpa in. Flanged joint analysis using parametrically controlled finite element approach charles s. Bx ring type joint gaskets,china bx ring type joint.
It has good sealing as the contact between gasket and the ring joint faces, especially the outside face, and is pressed tightly to keep good sealing performance. Rubber coated ring type joints this is an octagonaloval section ring type joint generally soft iron or low carbon steel totally enclosed in a nitrile rubber coating. Roctagonaal solid metal gasket for api or asme ring type joint flanges. The more commonly used ring type joint materials are soft iron, low carbon steel and different types of stainless steel. When selecting a bellows from the catalog data pages that will have flanged connections, it is important that the system designer confirm that the flanges he has selected have an adequate pressure. The designs shown in the ansi expansion joint section can be easily modified to include a special fitting one end such as a caterpillar flange, waukesha turbo flange, weld end or even a. Procedures for critical joints need to consider the individual requirements of each joint. Flange joints consist of a pair of identical discs with a row of attachment holes close to their outer circumference. Ring type joint flanges, rtj flanges, ss ring type joint. Very recently work of choudhury 5 in 2006 and choudhury et al 6 in 2008. Rovaal solid metal gasket for api or asme ring type joint flanges. Raised face flat face ring type joint tongue and groove male and female din flange summary chart rated pressure in bar 1 bar 14. It is always recommended that the gasket material be softer than the mating flanges. Here below you will find a short description and definition of each type, completed with an detailed image.
Welding neck flange welding neck flanges are easy to recognize at the long tapered hub, that goes gradually over to the wall thickness from a pipe or fitting. Offset distances are based on 18ft or 20ft lengths. There are 7,304 suppliers who sells flange joints on, mainly located in asia. Characteristics gasket profiles and limiting values. The flanges seal when the bolts are tightened and the gasket is compressed into the groove making a metal to metal seal.
Available in different dimensions and finishes to meet specific demand of clients, this rtjf is highly demanded in numerous industries. Slipon flange lap joint flange welding neck flange blind flange screwed end flange socket welding flange flange faces provided. An rtj flange usually has a raised face with the groove machined. Ring joint eriks type r ovaal rvs 316 high integrity metallic sealing. Pdf fatigue of shaft flange bolted joints under preload. The flanged joint design means that pipes are secured by external screws, providing additional joint support for the transportation of substances at high pressure. A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe for example, a closet flange. Ring joint flange facing dimensions robertjames sales. Ring type joint flange is a method of ensuring leak proof flange connection at high pressures. Unless other wise specified by the customer, ring type joint flanges will be furnished in accordance with these. A flange joint is a nonpermanent, removable method of joining or blanking off steel and plastic pipes.
Previous flanged joint alignment guidelines were primarily obtained from fabrication specifications such as asme b31. When formulating procedures the flange design, gasket type and level of bolt load accuracy required must be considered for each joint. Ring joint flanges catalogue hydraulic and offshore supplies. Flanges are external ridges on beams or pipes that allow them to be attached to other objects. Joint integrity management of critical flanges sciencedirect. American mechanical joint pipe for water, sewage or other. Sections of pipe are able to be bolted or welded together at these flanges. Leader ring type joint flange gaskets rtj gaskets are used in applications that involve extreme pressures and high temperatures. Flanged joint article about flanged joint by the free. Most industrial flange connections are designed in accordance with asme codes that reference bolts and nuts following astm standards. For cases where no standard flange exists, the more complex rules of asme appendix 2 can be used.
Astm a105 asme sa105, astm a350 asme sa350, astm a181 lf 2 a516 gr. Dimensions and tolerances are in accordance with asme b16. The more popular ring type joint materials, with the recommended maximum hardness and identification as specified in api 6a,are shown in the table below. Ring joint flange is a special type of flange connection in which a metal ring resting in a groove in the flange serves as a pressure seal between the two flanges.
Used for low presure systems and where welding could be hazardous. Flanges and fittings isokf flanges and fittings easy and reliable isokf flanges and fittings allow quick release and tight connections from 10 to 50 mm nominal diameters. Ring type joint flanges manufacturers piping material. You can also choose from equal, reducing flange joints, as well as from female, welding, and male flange joints, and whether flange joints is coupling, nipple, or cross. Ring type joint flanges, stainless steel ring type joint. Joint relaxation behaviour of gasketed bolted flanged pipe. All eriks ring type joint gaskets are manufactured in compliance with api6a and ansi b16. Groove depth e is not included in flange thickness t but is included in the connection overall length l. Microsoft word 150 lap joint with 30 and 36 author.
When two pipes are to be joined, the two discs are placed against each other in such a way that the holes line up. The ring type joint material is selected in order to suit the application conditions. Flange joint is an assembly of three different components. Ring type joint flange face surfaces are an increasingly popular option with regards to flange connections. Precision engineered flanges ring joint flanges class 150 facing dimensions. What are typical torque values for ring joint gaskets typically 50% of the bolt yield is applied as a bolt stress. The joint should be assembled with the pipe in reasonably straight alignment. Rtj flanges are a good alternative to raised face in. Ring type joint flanges, ss ring type joint flanges, ss. The summary of flange data listed below is offered as a guide to assist designers in selecting the most economical flanges for their piping system. Rtj flanges seal when tightened bolts compress the gasket between the flanges into the grooves, deforming or coining the gasket to make intimate contact inside the grooves, creating a metal to metal seal. A ring type joint flange, abbreviated as rtjf, is a type of flange that uses a metal ring that sits in a hexagonal groove as a gasket to seal the flange pair. Welding neck, slip on, socket weld, lap joint, threaded and blind flange.
The more popular ring type joint materials, with the recommended. A wide variety of flange joints options are available to you, such as hexagon. Joint deflection to the maximum shown above may be made after assembly but before tightening bolts. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal.
A ring type joint flange, abbreviated as rtjf, is a type of flange that uses a metal ring that sits in a hexagonal groove as a gasket to seal the. What fasteners should i use for my bolted flange connection. This flange is a solid circle drilled to match a companion flange. It is always important to check to ensure that fasteners with the correct specifi. This association leads to safer flange connections. Widely used in pressure testing procedures, minimising damage to the flange. In the process industries, flanges are most often important in the context of pipelines and piping.
These pipe flanges are most reliable type of flange joint but are costlier than the other type of flanges. The principle governing document for the selection of water joint gaskets is awwa c20720. Finite element analysis was performed for bolt tension in a flanged pipe joint varying parameters like pipe diameter, pipe. A great way to understand a flange in more detail requires engineers to. Ring type joint flange dimensions wn rtj flange dimensionsclass 2500. A wide variety of ring type joint blind flange options are available to you, such as iso, ansi, and asme. Rtj flange manufacturers, ring type joint flanges, ss rtj flange. Eriks api ring type joint flange gaskets rtj gaskets are used in applications that involve extreme pressures and high temperatures.
Dims bw elbows 4590 lr valves general pressure classes of flanges flange types. With 2 flanges coupled together by a centering ring with a oring and a clamp fig. Used wherever a sound welded joint connection is needed threaded the bore of this flange is threaded to match the pipe size. Rtj flanges have grooves cut into their faces which accept steel ring gaskets. For all the tests, same pair of gasketed flanges with four different gaskets of same dimension, same. Bx ring type joint gasket refers to the metal gasket of bxshaped section by processing metal materials.