Flanges with different faces require different gaskets and shall never be mated to prevent leakage of the joint. If the average roughness of flange face is not according to the described standards, the contacting surfaces would not properly seal and the flanged joint may wear after some time working under pressure (resulting in loss of bolt joint tightness and a possible leakage). OVERVIEW. Cold Water Finish The flange face appears as mirror like. White. Flange faces with a smooth finish should show no apparent sign of tool markings when viewed with the naked eye. 9.12. The Wall Flange Fitting is available in two configurations: 561 / 514-7 comes with the required 514; fittings 561-7 comes without the required 514; fittings The 514 fitting is required when using this component. To make a high-quality seal, the face of the flange makes an excellent match between gasket, flange, and mating flange. Simply subscribe using the button below. According to the ASME/ANSI specifications, the serrated, spiral serrated, and concentric flange face finish should have an average roughness of 125 µinch to 250 µinch (3.2 µm to 6.3 µm). Concentric serrated- 90 Deg incline angle tool is used for making the groove and it is making the groove of 1/64” deeper and about 1/32” into the concentric circles. The symbol Y1 to Y8 represent the peak heights which are measured from the mean line. As with the stock finish, the spiral serrated finish uses a continuous spiral groove around the face. RTJ flanges can be sealed by RTJ gaskets of different styles (R, RX, BX) and profiles (example: octagonal/oval for the R style). Flat face and smooth finish are not the same. Fluted Flanges (63-F) 63-5-SS – 5’ Stainless Steel Shower Rod Set Polished Finish 1” Diameter Smooth Rod Exposed Screw Mounting Flanges (63-F) 63-5-HD – 5’ Heavy Duty Stainless Steel Shower Rod Set Polished Finish 1” Diameter Fluted Rod Exposed Screw Mounting Flanges (63-F-PB) 1. SMOOTH FINISH OR FACE. OR What is Flange Face Finish Aarh ? Serrated finish flanges are used for high pressure high temperature pipe lines such as superheated steam, to help prevent the flange 'blowing' in the event of gasket deterioration or sudden stress. In a bolted flange joint, the flange face is in direct contact with the gasket. Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. The resultant surface finish shall have a 125u inch to 250u inch (ANSI B 16.5 para 6.5;4.1). According to ASME, the adjacent imperfections should be separated by a distance of at least 4 times the maximum radial projection. The equipment used to measure the surface roughness is the so-called “profilometer” (which are available in the contact and non-contact types). Check All Types of Flange Finish Types Related Topics in Page. There are two type of flange face finishes for Raised Face and Flat Face Flanges; Smooth finish; Serrated finish (serrated concentric grooves, serrated spiral grooves) Both serrated finishes have grooves 1/16" deep with 24 to 60 groves per inch. Park Manor Wine & Spirits 607-757-9769 United States. hbspt.cta._relativeUrls=true;hbspt.cta.load(291667, '9a36f221-cf19-425c-b9bc-bcf4b3929510', {}); 2018 Mirage Machines Limited - All Rights Reserved Mirage Machines Limited is registered in EnglandNumber 2788205, 2018 Mirage Machines Limited - All Rights Reserved Mirage Machines Limited is registered in England, Number 2788205, Guide to Flange Face Surface Finish Types. Smooth Finish. 125 – 250 microinches). In contact type profilometer the roughness is measured by moving the material under the profilometer stylus. The female face is 3/16” deep, while the male face is 1/4″ high, and both of them are smooth finished. Manufacturer Color/Finish. above 700/800 C°). The gasket contact surface is crafted using a continuous spiral groove (often referred to as phonographic) using a 1.6mm radius round-nose tool with a feed rate of 0.8mm per revolution and a depth of 0.15mm. The 514s connect the pipe to the fitting, form a smooth railing surface. They are used with metal to metal contact. Flanged ends for cement-lined pipe and fittings. The smooth finish flanges are specified when metallic gaskets are specified and serrated finish is provided when a non-metallic gasket is provided. The ASME B16.5 and ASME B16.47 norms mention a few different types of flange faces: A raised face flange (RF) is easy to recognize as the gasket surface area is positioned above the bolting line of the flange. A stock finish face is manufactured using a phonographic spiral groove featuring a 1.6mm radius round-nose tool with a depth of 0.15mm and a feed-rate of 0.8mm per revolution. The cold water finishes appear shiny to the naked eye and are very smooth. The American Society of Mechanical Engineers (ASME) has been around for over 130 years and is the standard setter for mechanical engineers in over 100 countries around the world. Weller is aged far longer than most wheated bourbons. Steel flanges are available with four basic face finish, however, the common objective of any type of flange face finish is to create the desired roughness on the face of a flange to ensure a strong match between the flange, the gasket, and the mating flange and thus provide a high-quality seal. The roughness of the flange faces can have a dramatic effect on gasket creep relaxation, blow out resistance and bolted joint tightness. Design & SEO By MESOTEK, Chemical & Mechanical Composition of Stainless Steel, Large and small tongue-and-groove flange (T&G). As per the stock finish, this is achieved by having the contact surface machined with a continuous spiral groove generated by a 0.8mm radius round-nosed tool at a feed rate of 0.3mm per revolution with a depth of 0.05mm (that creates a roughness between Ra 3.2 and 6.3 micrometers, i.e. Raised face flanges are the most sold type of flange, at least for petrochemical applications. However, unlike the round nosed tool used in the stock finish, spiral serrated finishes have a groove that is typically generated using a 90-deg tool. Flange face finish can be defined by roughness on the surface of flanges. The serrations shall be at the same level, and the protrusion above them is not permitted. Too shallow (exceptionally smooth surface finish) and again high compression is required as a leak path then becomes more possible. Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. More Info: W.L Weller 12 Year. The height of the raised face depends on the flange pressure rating as defined by the ASME B16.5 specification (for pressure classes 150 and 300, the height is 1.6 mm or 1/16 inch, for classes from 400 to 2500, the raised face height is approximately 6.4 mm, or 1/4 inch). More than several years ago, the standard finish on raised face flanges was around 500 microinch roughness. This type of flange finish is used with metal-facing gaskets such as the jacketed type. Twist-n-set replacement closet flange. Smooth unrestricted flow design. A serrated finish, concentric or spiral, has from 30 to 55 grooves per inch and roughness between 125 to 250 µinch. Some users and licensers desired a smoother flange finish for services like hydrogen to get a better flange seal when used with spiral wound gaskets. See: Flange Face Finish Type. Flat face flanges (FF) have a contact surface having the same height as the bolting line of the flange. Flange Grades; Flange Sizes. Flange faces with a smooth finish should show no apparent sign of tool markings when viewed with the naked eye. Concentric serrated finishes use the same tooling at the spiral serrated finish although the grooves produced will be concentric grooves that are an equal distance apart rather than a continuous spiral groove. These finishes are often used for gaskets with metal facings such as double jacketed, flat steel and corrugated metal. It is important to always check the flange surface finish for imperfections which would make sealing difficult. As part of the wheated bourbon family, this twelve year old W.l. It can cause the adjacent serrations to lose hold of the gasket material and may result in wears and leakages. The flange face finish is determined by the standard used and measured as an Arithmetical Average Roughness Height (AARH). A. The term AARH (“arithmetic average roughness height”) refers to the flange face smoothness/roughness. This finish is equivalent to a ground surface as it uses high-speed machining with a wide tool. without a gasket. The grooves are crafted by the same 90-degree tool used for the spiral serrated finish, but the serrations have an even design on the face of the flange. An example would be ANSI B16.5 which specifies face finishes within a range 125AARH - 500AARH (3.2 Ra to 12.5 Ra). Two tongue and groove flanges (T&G face) perfectly fit one into the other: one flange has a raised ring, the other a groove and they can be mated easily (the tongue enters the groove and seals the joint). Copyright © 2015 randhirmetal.com | All rights reserved. The resultant surface finish has a 500 microinch (12.5 ㎛) approximate roughness. or larger radius. Either a serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch is used. The ASME b16.5 code requires that the flange face (raised face and flat face) has a specific roughness to ensure that this surface be compatible with the gasket and provide a high quality seal. Allowable roughness of Smooth/Serrated Finish flanges is 125-250 micro inch AARH. Smooth finish flanges are more common for low pressure and/or large diameter pipelines and primarily intended for use with solid metal or spiral wound gaskets. No gasket is used between the flanges. to 2.2 grooves/ mm.). Tongue and groove flanges are standardized in both large and small types. Flange Grades Flange Sizes Flange Faces Flange Materials Flange Standards Flange Schedules Flange Surface Finish More. Extra Smooth Finish Flanges are used with Metal RTJ and T/G Flanges. See section 6.4.5 for flange finish details. These finishes are often used for gaskets with metal facings such as double jacketed, flat steel and corrugated metal. FLANGE FACE TYPES Figure 9.12. The resulting “Ra” value (AARH) for the surface ranges from 125µinch to 500 µinch (125 µm to 12.5 µm). Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. There are common types of flange face finish, such as stock, spiral serrated, concentric serrated, and smooth flange finish. Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. The term RFSF was used to differentiate these smooth face flanges from those with the rougher standard finish. The sealing performance of the flanges’ gaskets depends on the AARH, the flange dimensions and the pressure of the stud bolts. Package Contents. Raised Face, and Large Male and Female: Either a serrated concentric or serrated spiral finish … The finish for flanges in hydrogen service is very smooth, typically between Ra 2 and 3.2 micrometers (79 - 125 microinch). A ring joint flanges (RTJ) is used when a metal-to-metal seal between the mating flanges is required (which is a condition for high-pressure and high-temperature applications, i.e. Metallic flange surfaces can range from a rough casting to the smoothness produced by lapping. The Stock Flange Finish is a continuous groove produced by using a 1/16” radius round nosed tool with a feed of 1/32” per revolution. A ring joint flange features a circular groove to accommodate a ring joint gasket (oval, or rectangular). . Smooth Finish Flange faces with a smooth finish should show no apparent sign of tool markings when viewed with the naked eye. The stock finish is the most widespread type of finish as it suits the large majority of applications. This creates a more prominent "V" geometry with 45° angled serration. This flange finish is usually expected to be used with metal to metal contact, i.e. ... Replaces broken cast iron closet flanges. hbspt.cta._relativeUrls=true;hbspt.cta.load(291667, 'bfa850b2-dffe-4aae-bea6-1eda21a707a3', {}); The stock finish is typically required for flange facings that will be in direct content with a gasket. However, modern equipment features non-contact measurements, leveraging the optical and ultrasonic technologies. Want to Know Flange Surface Finish Chart and Flange Surface Finish Types? As the mating flanges are bolted together, gaskets get “squeezed” into the flange face surface and create a very tight seal. Hydrogen Service Finish The finish for flanges in hydrogen service is very smooth, typically between Ra 2 and 3.2 micrometers (79 - 125 microinch). The AARH value for these surfaces ranges between 85 µinch to 100 µinch. ASME set the standards for flange face surface finish types through the ANSI accredited ASME Standard B 16.5 ensuring all gasket and flange fittings are consistent and fit for purpose allowing a high quality seal. roughness on top the surface): smooth, stock and serrated. Surfaces using a cold water finish are not usually intended to be used with a gasket, meaning the flange faces will be in direct contact. The pressure embeds the soft face of the gasket into the flange finish and results in the formation of a good seal due to the friction existing between the contacting parts. The soft nonmetallic materials such as PTFE may be used for more comfortable facing and better creep resistance. Flange. To ensure that a flange mates with the gasket and the companion flange perfectly, some roughness is required on the flange surface area (RF and FF flange finish only). This will result in a finish with a roughness between Ra 3.2 and 12.5 micrometers (125 - 500 microinch). Based On Material Of Construction The flanges are normally forged except in very few cases where they are fabricated from plates. PVC Twist-N-Set Closet Flange in the Toilet Flanges department at Lowe's.com. The raised face is, according to ASME B16.5, the default flange face finish for manufacturers (this means that buyer shall specify in the order if another flange face is required, as flat face or ring joint). The AARH value for these flange surfaces is 85 µinch to 100 µinch. Installs easily without tools. The tool used to imprint a rough finish on the flange should have a radius of 0.06 inch (1.5mm) or larger. The most common RTJ gasket is the R style with an octagonal section, as it ensures a very strong seal (the oval section is an older type). One flange has an area extended beyond its face area, the male flange, the other flange has a matching depression machined on the facing surface, the female flange. ASME/ANSI defined specific roughness standards for the flanges, as the flange face finish plays a pivotal role in gasket’s reliability and service life. $ 199.99 W. L. Weller Bourbon 12 Year Straight Whiskey. Common types are stock, concentric serrated, spiral serrated and smooth flange finish. Every material possesses a surface roughness and sometimes surfaces are finished deliberately to have a specific roughness (small or bigger). According to ASME B31.3, a flat face flange should never be mated with a raised face flange as the resulting flanged joint would definitely leak. The facing finish or face finish of a pipe flange manufactured in accordance with ASME B16.5 refers to the smoothness or roughness of the facing surface. Below are the standard surface finish types as determined by ASME. SMOOTH FINISH OR FACE. Flanges with a smooth finish do not show visible tool markings at naked eye. Shipping info for Park Manor Wine & Spirits. 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Is 1/4″ high, and smooth flange finish details changed with the rougher standard finish on the value. Into the flange faces ; flange Standards flange Schedules flange surface finish for flanges in service. Different faces require different gaskets and shall never be mated to prevent leakage of the material! 0.079Mm is most commonly used than pipe flanges the cutting tool employed shall a... - 125 microinch ) in wears and leakages and are very smooth, typically between Ra 2 and 3.2 (... Tight seal edition fo the standard W. L. Weller Bourbon 12 Year Straight.! Y1 to Y8 represent the smoother surface the AARH value for these ranges! Surface having the same be evaluated by subtracting the inner radius from the outer diameter of gasket. ( AARH ) groove density on the flange and gasket surfaces this twelve Year old W.l, while lower represent! Surfaces ranges between 85 µinch to 100 µinch least 4 times the maximum allowable roughness Smooth/Serrated! Grooves per inch and roughness between Ra 2 and 3.2 micrometers ( 79 - 125 microinch ) to differentiate smooth! Both large and small types peak heights which are measured from the outer radius,.