Rtj flanges have grooves cut into their faces which accept steel ring gaskets. It is based on proven technology, has no moving parts and is suitable for hightemperature and highpressure applications. 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. 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. The types of flanges for piping explained projectmaterials. Further to this, when the flanges were disassembled, damage was found on the rtj groove in which the ring type gasket seats.
For more highly specialized applications, ring type joints. Flanges used in piping orifice, threaded, slipon, blind, weld neck, socket, lap joint, and reducing are available with a variety of facings, such as raised, flat, and ring joint. Flexitallic style r ring type joints can be manufactured in accordance with all relevant standards to suit the following flange designations. For more highly specialized applications, ring type joints can be machined from duplex steels and other. Email this page download pdf download pdf printable page. Class 900 facing dimensions for ring 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.
A wide variety of flange types pdf options are available to you, such as iron, plastic. Product style product image note download leader ring type joint pdf bx bx ring gaskets are manufactured in a special symmetric shape of the crosssection. Type d gaskets are specifically designed to fit into the ring groove of ring type joint flanges. Table 2 awwa c20718 class d ring flanges on coastal flange.
Bx ring type joint gasket is one kind of pressure energized ring gaskets. Other flange facings covered by these standards include the large and small tongueandgroove facings, and the ring joint facing specifically for ring joint type metal gaskets. Inspect the mating flanges to ensure that they are clean and free of all foreign matter before installing the rubber expansion joint. Rtj flanges have grooves cut into their faces which accept steel ring. Ring type joint rtj gasket basics and types mechanical. Ring type joint gaskets are metallic sealing rings, suitable for highpressure and hightemperature applications.
A lengthy and costly exercise, both in terms of man hours. Cutaway view of bx steel ring and flange as follows. Type d gaskets are available in basic oval as well as octagonal shape. Gasket handbook 1st edition fluid sealing association. The ring type joint flanges are typically used in high pressure class 600 and. Nominal pipe size groove dimensions diameter of raised portion k. The flange face is the surface area that hosts the gasket. The ring type joint material is selected in order to suit the application conditions. Flanges with different faces require different gaskets and shall never be mated to prevent leakage of the joint. Class 1503006001500 2500 din pn 6 welding necksliponblind flanges. This type of joint connection is speedy and simple but not suitable for high presser and temperature applications. Flange facing type and gasket part10pipe designasme b31. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together.
The ring type joints are manufactured as per asme b16. A rtj flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together, usually has a raised face with the groove machined into the face of the flange. If raised face flanges are to be used, the flange lip is to be no more than 116 tall. The inner ring also reduces flange erosion and protects the sealing element. Sep 03, 2018 design hub this video shows you flange facing type and gasket. C this dimension is commonly associated with true lap joints. Learn different types of pipe flanges used in piping. The more commonly used ring type joint materials are soft iron, low carbon steel and different types of stainless steel. Hole size where required due to bolt spacing shall be the same as the flange bolt hole.
Lap joint from a bolt hole diameter, number of bolt holes, bolt circle diameter, outer flange. Also available are bx gaskets with pressure ratings to. 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. About 93% of these are flanges, 3% are pipe fittings. Ring type joint flanges rtj or ring joint facing flanges rjf. 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. The flexitallic group is the international market leader. Rtj face dimensions and flange tolerances pdf for printing. Rtj flanges are used to ensure a leak proof flange connection at high pressures. Ringjoint, spiralwound, and jacketed ring type joint. Kammproadapter gaskets allow for ring type joint flanges to be mated up to a raised face flanges, utilizing the strengths of the full metallic with the added benefit of kamm profiled sealing surfaces laminated with flexible graphite. Marcel piping is renowed ring type joint flange manufacturers in india, a asme b16.
The ring type joint was initially developed for high pressure up to 1500 bars and temperatures up to. Stud bolts dimensions for raised face and ring type joint. Standard flange ratings from ansi class 150 to 600, extended rating to ansi. It is always recommended that the gasket material be softer than the mating flanges. Amardeep steel centre is one of the leader manufacturers, supplier and exporters of high quality ring type joint flanges, rtj flanges, stainless steel ring type joint flanges, ss rtj flanges, carbon steel rtj flanges, alloy steel ring type joint flanges, nickel alloys ring type joint flanges in india. Reducing flanges are available in all types and pressures. 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. The most commonly used standard that covers dimensional information on flange types and flange faces used in process piping systems design to asme b31. The outer centering ring centers the gasket within the flange and acts as a compression limiter, while the inner ring provides additional radial strength.
The article describes the scope of each type of gasket, the dimensions to asme b16. Backed by a group of experts, are involved in providing a widespread range of ring type joint flanges to our esteemed clienteles. It is of pressure energized seal in radial direction, one special kind of octagonal metal ring gaskets. Unless other wise specified by the customer, ring type joint flanges will be furnished in accordance with these. Custom shapes and sizes are also manufactured by numerous manufacturers.
Learn about the 5 key flange gaskets types used in the oil and gas industry. Ring type of flanges rtj, bleed or drip ring flanges. This jointing method can be employed on weld neck, slipon and blind flange. Bx ring type joint gaskets,china bx ring type joint gaskets. About 14% of these are flanges, 23% are pipe fittings. A spiral wound gasket may include a centering ring, an inner ring or both. The ring flangetyte gasket is a high performance gasket for flanged joint piping systems. Based on flange facing types, it can be further classified as. 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 seal.
The standard response to such flange leakages had been to reweld and remachine the rtj groove of the flange faces and fit a new ring joint. Pressure rating at atmospheric temperature is 175 psi for sizes 12 and under and 150 psi for sizes 14 and up. Flanges include slip on flanges, blind flange, weld neck flange, socket weld flange, lap joint flange, orifice flange, spectacle blind flange, spades and spacers, anchor flange, swivel ring flange and bespoken flanges. Dimensions of ring joint facings all pressure rating classes. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal. Bubble bag, then put in to export wooden neatly in to dimensoons during transportation to prevent bumpsscratches and other situations encountered or as per customer requirement.
Ring type joint flange is a method of ensuring leak proof flange connection at high pressures. It is a forged ring that fits into the machined groove of an rtj flange. Bx ring type joint gaskets,china bx ring type joint. Rf, ff, rtj flange face and finish projectmaterials. Type d type d gaskets are specifically designed to fit into the ring groove of ring type joint flanges. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to.
Flanges are used, alternatively to welded connections, to facilitate maintenance operations a flanged joint can be dismantled quickly and conveniently. Successful sealing of problem flanges in high temperature. Female ring joint groove dimensions shall be designed for octagonal rings in accordance with ansi b16. It should be clean, degreased and free of any defects, nicks or burrs. Bsm rjt fittings ring joint type bsm male rjt stainless steel 316 to identify the size of fitting measure o. The long tapered hub of wnrf flanges, differentiates them from other types of flanges. Slipon flanges are slipped over the pipe and welded to provide strength and prevent leakage. The type of flange to be used for a piping application depends, mainly, on the required strength for the flanged joint.
Pipe recommends the use of full face flangetyte gaskets or ring flangetyte gaskets with ductile iron flanged joint products supplied by u. This can also occur with threaded flanges if the pipe is not machined flush to the flange face and lap joint flanges with lighter schedule pipes that are rolled over to. The most commonly specified flange faces are raised face, ring type joint, and flat faced. Distance between flanges or ring joints when ring is compressed p a h c d l. Various types of flanges are available, depending on construction. Some sizes of bx ring type joint gaskets should have the pressure hole through the ring cross section. However, selecting the right gasket for a leakfree seal requires. In these pressure classes, most suppliers show the h and b dimensions. The flanges seal when the bolts are tightened and the gasket is compressed into the groove making a metal to metal seal. Keywords daniel, flange union, daniel industries orifice plate. They are dimensionally suitable for use with flanges manufactured. Nonmetallic soft gaskets are available as ring type idod gaskets, full face idod with bolt. Gasket profiles and limiting values ring joint gaskets are made from metallic materials.
If you need help deciding which flange best suits your application, feel free to. Slipon flange lap joint flange welding neck flange blind flange screwed end flange socket welding flange flange faces provided. These gaskets were designed specifically for the unique surface of ductile iron. Rtj face dimensions and flange tolerances texas flange. Ring type joint flanges, ss ring type joint flanges, ss 316. Orifice plates are recommended for clean liquids, gases and lowvelocity steam flows. When a flanged joint is opened, the gasket should be not be reused. Spiralwound gaskets are used with raisedface flanges, and ring joint gaskets are used with ring type joint rtj flanges. Nowadays it can be found on valves and pipework assemblies. Groove depth e is not included in flange thickness t but is included in the connection overall length l. In the case of a ring type joint, the surfaces of the flanges should again be free of deterioration, clean, and the ring used should be of the correct type. If the mating flange is plastic or frp it is recommended to use a. Ring joint flanges catalogue hydraulic and offshore supplies.
Lap joint flange welding neck flange blind flange screwed end flange socket welding flange flange faces provided. Ring type joint flanges, stainless steel ring type joint. 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. Scan this qr code to access the fsa gasketed joint questionnaire from the fsa website.
Apr 12, 2018 the ring type joint rtj gasket basics and types. Type r oval and octagonal rtj dimensions to asme b16. Nonmetallic gaskets are used with flat or raisedface flanges. Spades for ring type joint flanges to suit ansi 147 b16.
Page, in estimators piping manhour manual fifth edition, 1999. Watch the video showing set up process of the mm600e flange facing machine. Ring type joints dimensions of class 600 female ring joint facing figure 8 blanks c12 note. Bx ring type joint gasket refers to the metal gasket of bxshaped section by processing metal materials. Threaded flanges are also known as screwed flange, and it is having a thread inside the flange bore which fits on the pipe with matching male thread on the pipe. Pdf piping joint handbook danny ferdiansyah academia. They are dimensionally suitable for use with flanges. Orifice flanges are one of the most economical means of measuring flow, and daniel orifice flanges are manufactured to be the most accurate. A wide variety of ring type flange options are available to you, such as standard, connection, and standard or nonstandard. Suppliers of flanges to the oil, gas, filtration, refining, petrochemical, desalination and offshore industries. A wide variety of ring type joint blind flange options are available to you, such as standard, material. In the case of a ringtype joint, the surfaces of the flanges should again be free of deterioration, clean, and the ring used should be of the correct type. Characteristics gasket profiles and limiting values.
Metallic spiral wound gaskets are the most common type used. They are manufactured of medium weave, fabricreinforced phenolic material and are sized to ansi and api specifications. A blind flange is a plate for covering or closing the end of a pipe. Stress develops between an rtj gasket and the flange groove when the gasket is bolted to a flange, leading to plastic deformation of the gasket. The most commonly specified flange faces are raised face, ringtype joint, and. A number of ring joint styles are available designed for specific flange types, these are. How to machine damaged rtj flanges mirage machines. Table with dimensions of stud bolts used with raised face and ring type joint flange connections, pressure class 300, asme b16.
The rtj type orifice plate incorporates an integral gasket, either oval or octagonal ring, for mounting between ring type joint flanges. The faces of the flanges must be free of sand, grit, grease, or other foreign matter. Rtj flange manufacturers, ring type joint flanges, ss rtj flange. A lengthy and costly exercise, both in terms of man hours and lost production, but in many cases this did not solve the issue and a repeat failure occurred with. Dimensions and tolerances are in accordance with asme b16. Flange faces should be square and free of burrs to allow for correct sealing of nuts. Ring joint gaskets and grooves probably originated in the boiler field, where they were used in various forms for manhole covers, autoclaves, and other closures. For more highly specialised applications,ring type joints can be machined from duplex steels and other exotic materials such as monel,inconel.
Types of gaskets for flanges soft, spiral, ring joint. They are always applied to special, accompanying flanges which ensure good, reliable sealing with the correct choice of profiles and material. These types of flanges are used with another type of flange to isolate the piping system or to terminate the piping as an end. Following the acceptance of ring joints for flanges and valves by api and the issuance of their standard, asa b16e on steel pipe flanges and flanged fittings was revised to include them, and the 1939 edition included standard dimensions for a full line of ring joint flanges based on the api. For smaller diameter joints, align the flanges and insert several bolts in the lower half of the flanges. Blind flanges are also used as a manhole cover in the vessel. Supplier of stainless steel and carbon steel ring type joint flange, in mumbai, check rtj flange dimensions and price list. There are five different types of asme flanges that are readily available and used throughout industry. Flange faces raised face rf, flat face ff, ringtype joint. Precision engineered flanges ring joint flanges class 150 facing dimensions. 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. The handbook covers typical flanges and gaskets that are used in.
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