Flange Faces Types - Flange Face flange -Raised Face / Full Face / RTJ Ring Joint (Facing Types)

Flange Faces Types - Flange Face flange -Raised Face / Full Face / RTJ Ring Joint (Facing Types)

Available all types of flanges, Flange Faces Types - Flange Face flange -Raised Face / Full Face / RTJ Ring Joint (Facing Types) pipe flanges manufacturer in india, Flanges at best price with high quality



Flat Face Flange

Ring Type Joint Flange

Raised Face Flange

FLANGE FACES TYPES

The types of flange faces are shown in the following image:

The term “flange facing” refersto the shape of the contact surface that seals the connection between two flanges (the area that seat the gaskets). The ASME B16.5 and ASME B16.47 norms mention different types of flange faces such as:

  • flat face (FF)
  • raised face (RF)
  • lap joint
  • male and female (M&F)
  • the large and small tongue-and-groove type (T&G)
  • ring joint (RTJ)

RTJ, T&G and M&Fflanges should never be coupled, as the contact surfaces of these differently faces flanges would not matchand create leakage of the joint. The considerations about facing typesapply both to carbon steel and stainless steel flanges.

The types offlange facesare shown in the following image:


FLAT FACE FLANGE (FF)


Flat Face (FF): The Flat Face flange has a gasket surface in the same plane as the bolting circle face. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting. Flat face flanges (FF) have a contact surface at the same height of the bolting line of the flange. Flat flanges should never be bolted with RF flanges according to ASME B31.1. Flat face is the most simple type of flange facing available.

Available all types of flanges, Flange Faces Types - Flange Face flange -Raised Face / Full Face / RTJ Ring Joint (Facing Types)

RAISED FACE FLANGE (RF)


Raised Face (RF): The Raised Face flange is the most common type used in process plant applications, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types. Raised face flanges (RF flanges) are widely used for oil & gas pipelines and are easy to recognize because the gasket surface is located above the bolting line of the flange. RF face flanges are compatible with a wide range of gaskets, from the flat cut types to the metallic and semi-metallic types (jacketed gaskets and spiral wound gaskets). The main goal of raised face flanges is to concentrate the contact pressure on a small area of the flange thus increasing the strength of the seal.The height of the raised surface depends on the rating of the flange and is defined by ASME B16.5 (for pressure classes 150 and 300, the height of raised face shall be approx. 1.6 mm (1/16 inch), while, for classes from 400 to 2500, the raised face height shall be approximately 6.4 mm (1/4 inch). The most common flange face finish for ASME B16.5 RF flanges is 125 to 250 micron Ra (3 to 6 micron Ra).

Available all types of flanges, Flange Faces Types - Flange Face flange -Raised Face / Full Face / RTJ Ring Joint (Facing Types)

RING JOINT FLANGES (RTJ)


Ring joint type flanges (RTJ) create a metal to metal seal between the mating flanges and are therefore used in high-pressure (600# and higher) and high-temperature (800 F° and higher) services. RTJ faced flanges have circular grooves that host metallic ring joint gaskets (RTJ type). As the two RTJ flanges are bolted together and tightened, the applied force compresses and deforms the metallic gaskets inside the grooves and creates a very tight metal-to-metal seal (obviously, the material of the ring joint gaskets has to be softer than the material of the flanges). RTJ flanges can be sealed by RTJ gaskets of different styles (R, RX, BX) and profiles (example: octagonal / oval for the R style). The most common RTJ gasket is the R style with octagonal section, as it ensures a very strong seal (the oval section is an older type, less and less used). The common "flat groove" design, however, accepts both RTJ gaskets with octagonal and oval section.

Available all types of flanges, Flange Faces Types - Flange Face flange -Raised Face / Full Face / RTJ Ring Joint (Facing Types)

TONGUE & GROOVE FLANGES (T&G)


Tongue-and-Groove (T&G): The Tongue and Groove faces of this flanges must be matched. One flange face has a raised ring (Tongue) machined onto the flange face while the mating flange has a matching depression (Groove) machined into it's face., Two T&G flanges shall be matched one to the other. The male flange has a tongue (which is a raised ring), wherease the female flange has a grrove that match the tongue perfectly. T&G facings are standardized in both large and small types.

Available all types of flanges, Flange Faces Types - Flange Face flange -Raised Face / Full Face / RTJ Ring Joint (Facing Types)

MALE & FEMALE FLANGES (M&F)


Male-and-Female (M&F): With this type the flanges also must be matched. One flange face has an area that extends beyond the normal flange face (Male). The other flange or mating flange has a matching depression (Female) machined into it's face., Male and female flanges (M&F flanges) are manufactured to be matched one to the other as well. Indeed, one flange face has an area extended beyond the normal flange face, i.e. the male, while the other flange has a matching depression machined on the facing surface, i.e. the female. The female face is 3/16'' deep, while the male face is 1/4-inch high, and both of them are smooth finished. The outer diameter of the female face retains the gasket.

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Material Grades for Flanges : Types of Flanges are available in the following material grades:

Material & Grades of Flange :
  • Stainless Steel Flange : ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L Flange
  • Duplex & Super Duplex Steel Flange : ASTM A182 / ASME SA182 F44, F 45, F51, F 53, F 55, F 60, F 61 Flange
  • Carbon Steel Flange : ASTM A105 / ASME SA105 ASTM / ASME A 350 , ASTM A181 LF2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706 Flange
  • Low Temperature Carbon Steel Flange: ASTM A350, LF2, LF3 Flange
  • Alloy Steel Flange : ASTM A182 / ASME SA182 & A387 F1, F5, F9, F11, F12, F22, F91 Flange
  • Copper Alloy Steel Flange : ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
  • Nickel Alloy Flange : ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020) Flange

Specifications of Flanges

ASME/ANSI B 16.5 Welding Neck Flange, Slip on Flange, Blind Flange, High Hub Blind Flange, Socket Weld Flange, Lap Joint Flange, Threaded Flange, Ring Type Joint Flange
PRESSURE CLASS 150 LB, 300 LB, 400 LB, 600 LB, 900 LB, 1500 LB, 2500 LB
ASME/ANSI B 16.47 Welding Neck Flange, Blind Flange [Series A & B]
PRESSURE CLASS 75 LBS, 150 LBS, 300 LBS, 400 LBS, 600 LBS, 900 LBS
ASME/ANSI B 16.36 Welding Neck Flange, Slip on Flange, Threaded Flange
PRESSURE CLASS 300 LBS, 400 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
BS 4504 SEC 3.1 Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange, Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange
PRESSURE CLASS PN 2.5 TO PN6, PN10, PN16, PN25, PN40
BS 4504 [PART 1] Welding Neck Flange, Hubbed Slip-On Hubbed Threaded, Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange
PRESSURE CLASS PN 2.5 PN6, PN10, PN16, PN25, PN40 TO PN 400
BS 1560 BOSS Welding Neck Flange, Socket Welding Flange, Slip-On Flange, Blind Flange, Screwed Boss Flange, Lapped Flange
PRESSURE CLASS 150 LB, 300 LB, 400 LB, 600 LB, 900 LB, 1500 LB, 2500 LB
BS10 Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange
TABLE Table D, Table E, Table F, Table H
DIN FLANGES DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
PRESSURE CLASS PN6, PN10, PN16, PN25, PN40 TO PN 100
Flange Faces Types - Flange Face flange -Raised Face / Full Face / RTJ Ring Joint (Facing Types)