Recommended surface roughness of flange sealing surfaces characteristics and details complete material certification and traceability ensure the highest standards of quality. A blind flange is a plate for covering or closing the end of a pipe. Lap joint flange welding neck flange blind flange screwed end flange socket welding flange flange faces provided. Class 1503006001500 2500 din pn 6 welding necksliponblind flanges. Type r oval and octagonal rtj dimensions to asme b16. Ringtype joint flanges are typically used in high pressure class. We are manufacturer, supplier and exporter of high quality ring type joint flanges rtj flanges. The depth of groove is added to the minimum flange thickness. Astm specifications for specific fastener and nut grades. Distance between flanges or ring joints when ring is compressed p a h c d l. Some of the most common types of flanges in the industry are welding neck flanges, slip on flanges, socket weld flanges, lap joint flanges, threaded flanges, and blind flanges. A number of ring joint styles are available designed for specific flange types, these are. 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.
Dimensions of ring type joint flanges rtj flanges rtj flanges have grooves cut into their faces which accept steel ring gaskets. Pipe flanges a method of pipe joints and its classification. Groove depth e is not included in flange thickness t but is included in the connection overall length l. Widely used in pressure testing procedures, minimising damage to the flange. Lap joint from a bolt hole diameter, number of bolt holes, bolt circle diameter, outer flange diameter perspective, these flanges are all the same. Flange joint is an assembly of three different components. This flange is a solid circle drilled to match a companion flange. Bx ring type joint gaskets,china bx ring type joint gaskets. The compress flange wizard is a tool that creates optimized appendix 2 flange designs with minimal time and effort. Flange joint synonyms, flange joint pronunciation, flange joint translation, english dictionary definition of flange joint. Rtj flanges have grooves cut into their faces which accept steel ring gaskets.
Flange faces raised face rf, flat face ff, ringtype joint. Duplex ring type joint flange, alloy 20 ring type joint flange in all dimensions to. 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. Pipe flanges are used at places where piping, instruments, valves, equipment etc. The ring type joint material is selected in order to suit the application conditions. Correct assembly of critical joint requires that the flange is analysed and the correct bolt load to seal the joint is established. These types of flanges are used with another type of flange to isolate the piping system or to terminate the piping as an end. An rtj flange usually has a raised face with the groove machined. Rtj flanges are used to ensure a leak proof flange connection at high pressures. Ring joint flange facing dimensions robert james sales.
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 metric flange. May 12, 2016 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. They are always applied to special, accompanying flanges which ensure good, reliable sealing with the correct choice of profiles and material. Refer to pipa guideline pop007 metal backing flanges for pe, for backing ring details and flange joint installation technical data. Ring type of flanges rtj, bleed or drip ring 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. Table 1 flange gasket materials, type and thickness flange class working pressure nominal pipe diameter thickness psi kpa in. First, identify the tops by determining whether a flange has a flat face, threaded bore, lap joint, weld neck, socket weld, or tongue and groove. Plastics pipes and fittings peel decohesion test for polyethylene pe electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm.
Management software, and ensuring full compliance with a clients joint integrity program by any personnel involved in joint integrity activity. Flange joint definition of flange joint by the free dictionary. Joint integrity inspectors perform on site flange joint inspection, along with supervision and witness of joint assembly and tightening, providing full and traceable qaqc documentation, and. Ring type joint flanges, rtj flanges, ss ring type joint. Some sizes of bx ring type joint gaskets should have the pressure hole through the ring cross section. Ring joint gaskets are designed to seal by initial line contact or wedging action between the mating flange and the gasket. They can be made of a number of different materials such as stainless steel, cast iron, aluminium, brass, bronze, or plastic, among others. 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. Noble model m12pi a ring type joints with ptfe inserts m12 model rx ring type joints. Learn different types of pipe flanges used in piping.
It is composed of a hub, or stub end, welded to the pipe and a backing flange, or lapped flange, which is used to bolt the joint together. Slipon flanges cannot be used with many types of fittings as the fitting ends are not. Backed by a group of experts, are involved in providing a widespread range of ring type joint flanges to our esteemed clienteles. Used for low presure systems and where welding could be hazardous. This jointing method can be employed on weld neck, slipon and blind flange. 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. Torque stress is the largest single cause of ptfe and stainless steel convoluted hose failure. Dimensions and tolerances are in accordance with asme b16. The flanges seal when the bolts are tightened and the gasket is compressed into the groove making a metal to metal seal. These types of flanges are used in high pressure and temperature application. What are typical torque values for ring joint gaskets typically 50% of the bolt yield is applied as a bolt stress.
Flange jointing flange joints are a long established, nonproprietary means of connecting pipes and fittings, usually in aboveground situations. An analytical investigation on bolt tension of a flanged steel pipe joint subjected to bending moments md riasat azim graduate student, department of civil engineering, university of british columbia, vancouver, british columbia, canada. Flange joint definition of flange joint by the free. Unless other wise specified by the customer, ring type joint flanges will be furnished in accordance with these. Eriks api ring type joint flange gaskets rtj gaskets are used in applications that involve extreme pressures and high temperatures. Characteristics gasket profiles and limiting values. Class 900 facing dimensions for ring joint flanges. Manufacturer of stainless steel ring type joint flanges ansi asme b16.
Joint integrity management of critical flanges sciencedirect. 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. What fasteners should i use for my bolted flange connection. 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. It is created by the mechanic on the job site, using the tools, procedures, and working conditions. Ring type joint flange manufacturer, ss raised face rtj ansi. Ring type joints noble engineers is an independent company manufacturing and supplying a variety of high quality sealing products designed for flange applications in the industrial and manufacturing sectors. This method is well known and needs very little elaboration other than to advise the sequence for tightening the bolts and the recommended torque settings. Ring joint flanges catalogue hydraulic and offshore supplies. Avoiding one of the biggest causes of premature hose failure. Ansi rtj flanges cl150cl2500 ansi ring type joint flanges. Flanged joint article about flanged joint by the free. Ringjoint, spiralwound, and jacketed ring type joint.
The raised face e is equal to groove dimension l but is not subject to the tolerance for l. The principle governing document for the selection of water joint gaskets is awwa c20720. Watch the video showing set up process of the mm600e flange facing machine ring type joint flanges are typically used in high pressure andor high temperature applications and differ from other flanges as angled faces are cut into the flange faces to accept steel ring gaskets, to create a metal to metal. Bx ring type joint gaskets,china bx ring type joint. An alloy hub with a galvanized steel backing flange is cheaper than a complete alloy flange. This will allow the flange to be fitted in place and checked for gross alignment before being welded to the pipe joint so that bolt hole alignment, and correct distance between the flanges can be verified. Ring type joint gaskets are metallic sealing rings, suitable for highpressure and hightemperature applications.
Slipon flange lap joint flange welding neck flange blind flange screwed end flange socket welding flange flange faces provided. It discusses new standards and the best practices available for companies needing to standardize their joint integrity management systems, or for those who need to implement a joint integrity management process from the ground up. In this protected type flange coupling the dimensions are as follows. 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. Swivel joints are used in the industry wherever a movable pipeconnection system between two equipment parts is needed. Previous flanged joint alignment guidelines were primarily obtained from fabrication specifications such as asme b31. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal. For cases where no standard flange exists, the more complex rules of asme appendix 2 can be used. Jul 18, 2014 ring type joint flange is a method of ensuring leak proof flange connection at high pressures. Heavy hex nuts are used in high temperature and high pressure. On the effect of external bending loads in bolted flange. Used wherever a sound welded joint connection is needed threaded the bore of this flange is threaded to match the pipe size.
On the effect of external bending loads in bolted flange joints article in journal of pressure vessel technology 12 april 2009 with 96 reads how we measure reads. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together. How to machine damaged rtj flanges mirage machines. Ring joint flange to rf flange asme mechanical code. Protected type flange coupling 3d cad model library. As referred to by many in the industry, our team of expansion joint experts are ready to assist you with your engine exhaust system. Bolt circle diameters are 18 inch larger than bolt diameter. Bx ring type joint gasket is one kind of pressure energized ring gaskets. Cutaway view of bx steel ring and flange as follows.
Protected type flange coupling of 25 mm shaft diameter and 4 bolt. This type of flanged joint is typically found on high alloy pipe work. Ring type joint flange is a method of ensuring leak proof flange connection at high pressures. Plastics pipes and fittings peel decohesion test for polyethylene pe electrofusion assemblies of nominal outside diameter greater than or equal to 90 mm amendment 1. Its pretty easy to identify the type of flange by how it looks. Precision engineered flanges ring joint flanges class 150 facing dimensions. These 7 factors are all involved in choosing the right flange for the right application to maximize its functionality. By applying pressure on the seal interface through bolt force, the softer metal of the gasket flows into the microfine structure of the harder flange material, creating a very tight and efficient seal. Dimensions and tolerances of ring joint gaskets type r.
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