A Ring Joint Flange (RTJ) is essentially a machined metal ring that has a deep groove cut across its face. The RTJ metal gaskets are in the groove to seal the flange pair. When the connection bolts of the RTJ Flange are tightened, the coupling is compressed and the flange pair creates a watertight seal. In general, RTJ flanges have a raised face with a groove in the flange, but the non-pressurized raised face is similar to a weld neck lift flange. Refer to the figure. 1, shows an example of a typical RTJ flange assembly.
Raised flanges are the most common type used in process plant applications and are easy to identify. It is called a raised face because the cushioning surfaces are raised above the face of the bolt circle. This surface type allows for a wide range of cushion designs to be used, including flat annular panels and metal composites such as spiral wraps and jacketed types.
For the height measures H and B of all described dimensions of flanges on this website, with exception of the Lap Joint Flange, it is important to understand and remember the following. In pressure classes 150 and 300, the height of raised face is approximately 1.6 mm (1/16 inch). In these two pressure classes, almost all suppliers of flanges, show in their catalog or brochure, the H and B dimensions including the raised face height. ((Fig. 1) In pressure classes
Flat flanges have a gasket surface in the same plane as the face of the bolt circle. Applications where flat flanges are used are typically those where mating flanges or flange connections are made from castings Flat flanges should never be bolted to a raised flange. ASME B31.1 stipulates that when connecting cast iron flanges to Carbon Steel Flanges, the protrusion of the carbon steel flange shall be removed and a full face gasket shall be provided. This is to prevent the thin cast iron flange from being thrown into the gap caused by the raised face of the carbon steel flange.
Ring flanges are commonly used in high pressure (Class 600 and above) and/or high temperature applications above 800°F (427°C). They have grooves cut across the face with steel ring joints. Sealing flanges when bolts are tightened compresses the joint between flanges in the grooves, deforming (or pressing) the joint to create intimate contact within the grooves, creating a layer metal-to-metal buffer. RTJ flangescan have a raised face with a machined annular groove inside. This projection does not form part of any part of the sealing means. For RTJ flanges sealed with washers, the flange protrusions to be joined and the clamped flange may be touching. In this case, the compressed joint will not support any additional loads other than the bolt tension, vibrations and movements cannot further crush the joint and reduce the joint tension.
The tongue and groove of these flanges shall match. The flange has a lifting ring (blade) machined into the flange while the mating flange has a corresponding recess (groove) machined into its face. Tongue and groove liners are standardized for large and small. They differ from men and women in that the inside diameter of the blade and groove do not extend into the base of the flange, thus retaining the gasket at its inside and outside diameters. They are commonly found on pump covers and valve covers.Tongue and groove joints also have the advantage of being self-aligning and acting as a binder store. The bevel joint keeps the load shaft aligned with the joint and requires no major machining operations.Joint flanges such as RTJ, TandG and FandM should never be bolted together. The reason is that the contact surfaces do not match and there is no joint of one type on one side and another on the other.
Key Features of Ring Type Joint Flanges:
Applications of Ring Type Joint Flanges:
Ring Type Joint Flanges are commonly used in industries where high pressure, high temperature, and critical fluid containment are essential. Some typical applications include:
In conclusion, Ring Type Joint Flanges are crucial components in industries that demand a reliable and durable sealing solution for high-pressure and High-Temperature applications. Their design and use of metal gaskets make them well-suited for challenging environments where safety and integrity are top priorities.
Ring Type Joint Flange Specification | ASTM A182 / ASME SA182 / ASTM A105 / ASME SA105 / ASTM A564 / ASME SA564 / ASTM A350 / ASME SA350 / ASTM A694 / ASME SA694 / ISO 1559-3 |
Ring Type Joint Flange Manufacturing Process | Hot Forging / Rolling / Machining |
Ring Type Joint Flange Grades | Stainless Steel - ASME SA182 / ASTM A182 F304, ASTM A182 F304L, ASTM A182 F304H, ASTM A182 F309S, ASTM A182 F310S, ASTM A182 F316, ASTM A182 F316, ASTM A182 F316L, ASTM A182 F316Ti, ASTM A182 F317L, ASTM A182 F321, ASTM A182 F347, ASTM A182 F904L, ASTM A182 F44 etc. Duplex Steel - ASME SA182 / ASTM A182 F51, ASTM A182 F53, ASTM A182 F55, ASTM A182 UNS S31803, ASTM A182 UNS S32750, ASTM A182 UNS S32760 etc. Carbon Steel - ASME SA105, ASTM A105, ASME SA105N, ASTM A105N, ASME SA350 LF2, ASTM A350 LF2, ASME SA694 / ASTM A694 F42, ASTM A694 F46, ASTM A694 F52, ASTM A694 F56, ASTM A694 F60, ASTM A694 F65, ASTM A694 F70 ISO 15590-3 L245, ISO 15590-3 L290, ISO 15590-3 L360, ISO 15590-3 L415, ISO 15590-3 L250, ISO15590-3 L285 Alloy Steel - ASME SA182 / ASTM A182 F5, ASTM A182 F9, ASTM A182 F11, ASTM A182 F22, ASTM A182 F91 Nickel Alloys - ASTM B564 / ASME SB564 UNS NO2200, ASME SB564 UNS NO2201, ASME SB564 UNS NO4400, ASME SB564 ASME SB564 UNS NO6600, UNS NO6600, ASME SB564 UNS NO6601, ASME SB564 UNS NO6625, ASME SB564 UNS NO8800, ASME SB564 UNS NO8810, ASME SB564 UNS NO8811, ASME SB564 UNS No8825, ASME SB564 UNS NO10276 |
Ring Type Joint Flange Outer Diameter | 1/2" NB TO 64" NB |
Ring Type Joint Flange Pressure Class | Class 150#, Class 300#, Class 400#, Class 600#, Class 900#, Class 1500#, Class 2500# or As Per Custom Requirement PN 6, PN 10, PN 16, PN 25 and PN 40 etc |
Ring Type Joint Flange Schedule | Sch 10s TO Sch XXS or As Per Custom Requirement |
Ring Type Joint Flange Facing Machine | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
Ring Type Joint Flange Dimension | ASME B16.5, ASME B16.47 SERIES A, ASME B16.47 SERIES B, ASME B16.36, BS10, EN1092-1:2013, MSS SP44, ASA, API-605, ISO 7005, ISO 15590-3, DIN 2631--2638, DIN 2573-2576, DIN 2527, DIn 2641-2642, DIN 2565-2566, DIN2502, AWWA, AS2129 TABLE C, D, E, F, J etc.. |
Ring Type Joint Flange Types | Welding Neck Flange, Slip On Flange, Socket Weld Flange, Lap Joint Flange, Threaded Flange, Blind Flange, Orifice Flanges, Plate Flange, Long Welding Neck Flanges, Weldoflange, Nipoflange, Expander Flange, Reducing Flange, WNRF Flange, SORF Flange, SWRF Flange, Custom Flange as per Drawing etc. |
Ring Type Joint Flange Other Testing | NACE MR0175, Ultrasoung TEST, IGC TEST, Intergranular Corrrosion Test as per ASTM A262 Practice E, Charpy Impact Test, Macro, Grain Size, Hardness, HIC, SSC, Sour Service etc. |
Ring Type Joint Flange Value Added Services | Rolling, Drill, Punch, CNC Machining, Sand Blasting, Shot Blasting, Heat Treatment, Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized |
Ring Type Joint Flange Packaging | Loose / Carrate / Wooden Pallet / Wooden Box / Plastic Cloth Wraps |
Ring Type Joint Flange Shipment & Transportation | By Road - Truck / Train Partial Load, Full Load, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air - Freighter Civil Passenger and Cargo Planes |
Ring Type Joint Flange Material Test Certificate | Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS, Bureau of Indian Standards BIS Approved ETC |
Stainless Steel Ring Type Joint Flanges
ASME SA182 / ASTM A182 F304 Ring Type Joint Flanges, ASTM A182 F304L Ring Type Joint Flanges, ASTM A182 F304H Ring Type Joint Flanges, ASTM A182 F309S Ring Type Joint Flanges, ASTM A182 F310S Ring Type Joint Flanges, ASTM A182 F316 Ring Type Joint Flanges, ASTM A182 F316 Ring Type Joint Flanges, ASTM A182 F316L Ring Type Joint Flanges, ASTM A182 F316Ti Ring Type Joint Flanges, ASTM A182 F317L Ring Type Joint Flanges, ASTM A182 F321 Ring Type Joint Flanges, ASTM A182 F347 Ring Type Joint Flanges, ASTM A182 F904L Ring Type Joint Flanges, ASTM A182 F44 Ring Type Joint Flanges etc.
ASME SA182 / ASTM A182 F51 Ring Type Joint Flanges, ASTM A182 F53 Ring Type Joint Flanges, ASTM A182 F55 Ring Type Joint Flanges, ASTM A182 UNS S31803 Ring Type Joint Flanges, ASTM A182 UNS S32750 Ring Type Joint Flanges, ASTM A182 UNS S32760 Ring Type Joint Flanges etc.
ASME SA105, ASTM A105 Ring Type Joint Flanges, ASME SA105N, ASTM A105N Ring Type Joint Flanges, ASME SA350 LF2 Ring Type Joint Flanges, ASTM A350 LF2 Ring Type Joint Flanges, ASME SA694 / ASTM A694 F42 Ring Type Joint Flanges, ASTM A694 F46 Ring Type Joint Flanges, ASTM A694 F52 Ring Type Joint Flanges, ASTM A694 F56 Ring Type Joint Flanges, ASTM A694 F60 Ring Type Joint Flanges, ASTM A694 F65 Ring Type Joint Flanges, ASTM A694 F70 Ring Type Joint Flanges
ISO 15590-3 L245 Ring Type Joint Flanges, ISO 15590-3 L290 Ring Type Joint Flanges, ISO 15590-3 L360 Ring Type Joint Flanges, ISO 15590-3 L415 Ring Type Joint Flanges, ISO 15590-3 L250 Ring Type Joint Flanges, ISO15590-3 L285 Ring Type Joint Flanges
ASME SA182 / ASTM A182 F5 Ring Type Joint Flanges, ASTM A182 F9 Ring Type Joint Flanges, ASTM A182 F11 Ring Type Joint Flanges, ASTM A182 F22 Ring Type Joint Flanges, ASTM A182 F91 Ring Type Joint Flanges
ASTM B564 / ASME SB564 UNS NO2200 Ring Type Joint Flanges, ASME SB564 UNS NO2201 Ring Type Joint Flanges, ASME SB564 UNS NO4400 Ring Type Joint Flanges, ASME SB564 ASME SB564 UNS NO6600 Ring Type Joint Flanges, UNS NO6600 Ring Type Joint Flanges, ASME SB564 UNS NO6601 Ring Type Joint Flanges, ASME SB564 UNS NO6625 Ring Type Joint Flanges, ASME SB564 UNS NO8800 Ring Type Joint Flanges, ASME SB564 UNS NO8810 Ring Type Joint Flanges, ASME SB564 UNS NO8811 Ring Type Joint Flanges, ASME SB564 UNS No8825 Ring Type Joint Flanges, ASME SB564 UNS NO10276 Ring Type Joint Flanges
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