This type of flange finish is used with metal-facing gaskets such as the jacketed type. The most common flange finish for ASME B16.5 RF flanges is 125 to 250 micron Ra (3 to 6 micron Ra). 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). without a gasket. Flange facing should be smooth finish between R a 3.2 and 6.3 µm. Flanges with different faces require different gaskets and shall never be mated to prevent leakage of the joint. 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. Park Manor Wine & Spirits 607-757-9769 United States. The end result is a finish that is exceptionally smooth and mirror-like in its appearance. 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). Want to Know Flange Surface Finish Chart and Flange Surface Finish Types? The serrations shall be at the same level, and the protrusion above them is not permitted. 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. 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). 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. The female face is 3/16” deep, while the male face is 1/4″ high, and both of them are smooth finished. Raised Face, and Large Male and Female: Either a serrated concentric or serrated spiral finish … The flange facings are machine finished toANSI/ASME B16.5 requirements. Cold Water Finish The flange face appears as mirror like. ASTM A182 F316L AWWA Flange, DN300, SCH 80S, Class D. Tags. “Smooth” finishes are usually found on machinery or flanged joints other than pipe flanges. The required standard serrated concentric or serrated spiral finish ranges from 3.2 micro meter 6.3 micro meter (125 micro inch to 250 micro inch) average roughness. This flange finish is usually expected to be used with metal to metal contact, i.e. The average arithmetic roughness height values are very important during the selection of flanges and gasket materials. The 514s connect the pipe to the fitting, form a smooth railing surface. Package Contents. The term RFSF was used to differentiate these smooth face flanges from those with the rougher standard finish. Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. For flanged ends (slip-on) for cement-lined pipe and fittings, see Fig. 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. 125 – 250 microinches). 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). There are various standards for the roughness of surfaces, set according to their type of application. The sealing performance of the flanges’ gaskets depends on the AARH, the flange dimensions and the pressure of the stud bolts. Type of flange face serrations are Concentric and Spiral. They are used with metal to metal contact. 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. 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. 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. Check All Types of Flange Finish Types Related Topics in Page. 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. The resultant surface finish has a 500 microinch (12.5 ㎛) approximate roughness. Flange face finishes- Cold water- It is having mirror-like finishes and is made with the wide tool at a greater speed that is giving the finished surface like the ground surface. Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. A raised face flange is compatible with a wide range of flange gaskets, ranging from flat to semi-metallic and metallic types (as, for example, jacketed gaskets and spiral wound gaskets), either ring or full face. Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. The flange face finish is determined by the standard used and measured as an Arithmetical Average Roughness Height (AARH). SMOOTH FINISH OR FACE. To have concentric grooves, the tool has a feed rate of 0.039mm per revolution and a depth of 0.079mm. Smooth finish; B. Extra Smooth Finish Flanges are used with Metal RTJ and T/G Flanges. The stock finish is the most widespread type of finish as it suits the large majority of applications. roughness on top the surface): smooth, stock and serrated. There are common types of flange face finish, such as stock, spiral serrated, concentric serrated, and smooth flange finish. Flange Grades; Flange Sizes. Flat face flanges (FF) have a contact surface having the same height as the bolting line of the flange. Flanges with a smooth finish do not show visible tool markings at naked eye. 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. For shop-welding, refer Section 9.17.3.4.1. As the mating flanges are bolted together, gaskets get “squeezed” into the flange face surface and create a very tight seal. SMOOTH FINISH OR FACE. Flange. Design & SEO By MESOTEK, Chemical & Mechanical Composition of Stainless Steel, Large and small tongue-and-groove flange (T&G). However, modern equipment features non-contact measurements, leveraging the optical and ultrasonic technologies. The resultant surface finish shall have a 125u inch to 250u inch (ANSI B 16.5 para 6.5;4.1). Arithmetic Average Roughness Height is usually measured in micro-inches and denoted by symbol “Ra”. NPS Size; DN Size; Flange Faces; Flange Materials; Flange Standards. Smooth Finish Flange faces with a smooth finish should show no apparent sign of tool markings when viewed with the naked eye. The AARH value for these surfaces ranges between 85 µinch to 100 µinch. Spiral serrated finish is a phonographic spiral groove type that differs from the stock finish as the groove is crafted by a 90 degrees tool (instead of a round nosed one) that creates a “V” geometry with a 45-degree serration angle. The outer diameter of the female face retains the gasket. Flange Grades Flange Sizes Flange Faces Flange Materials Flange Standards Flange Schedules Flange Surface Finish More. These are the standards for semi-metallic and nonmetallic gaskets. Width (Inches) 5.5. or larger radius. This finish is equivalent to a ground surface as it uses high-speed machining with a wide tool. The AARH value for these flange surfaces is 85 µinch to 100 µinch. ... Flange Surface Finish; Smooth Finished; Smooth Finished. Terminate a smooth railing surface into a wall. Installs easily without tools. Flanges with a smooth finish do not show visible tool markings at naked eye. Below are the standard surface finish types as determined by ASME. Weller is aged far longer than most wheated bourbons. PVC Twist-N-Set Closet Flange in the Toilet Flanges department at Lowe's.com. 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 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. A. 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. Flanged ends for cement-lined pipe and fittings. Based On Material Of Construction The flanges are normally forged except in very few cases where they are fabricated from plates. To achieve this a feed rate of 0.039mm per revolution with a depth of 0.079mm is most commonly used. Before you read on you may wish to subscribe to receive alerts when we post similar information. These finishes are often used for gaskets with metal facings such as double jacketed, flat steel and corrugated metal. 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. Smooth unrestricted flow design. Either a serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch is used. The main scope of a raised face flange design is to concentrate the pressure of the two mating flanges on a small surface and increase the strength of the seal. 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. A critical and fundamental aspect of sealing is the level of friction between the flange and gasket surfaces. Flange face finish can be defined by roughness on the surface of flanges. Twist-n-set replacement closet flange. As part of the wheated bourbon family, this twelve year old W.l. The concentric serrated flange finish features concentric grooves instead of spirals. The stock finish is suitable for most general surface conditions. Shipping info for Park Manor Wine & Spirits. 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. Tongue and groove flanges are standardized in both large and small types. This flange finish is usually expected to be used with metal to metal contact, i.e. Stock finish; Flange face finish. This type of flange finish is used with … They are used with metal to metal seals (no gasket). $ 199.99 W. L. Weller Bourbon 12 Year Straight Whiskey. A lap joint flange has a flat face, which is not used to seal the flanged joint but simply hosts the back of a stub end. Smooth Finish: The cutting tool employed shall have an approximate 0.06″ radius. FLANGE FACE TYPES This type of flange finish is used with metal-facing gaskets such as the jacketed type. As with 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. to 2.2 grooves/ mm.). 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 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). 9.12. More than several years ago, the standard finish on raised face flanges was around 500 microinch roughness. This will result in a finish with a roughness between Ra 3.2 and 12.5 micrometers (125 - 500 microinch). 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. A raised face ASME B16.5 flange finish details changed with the 1996 edition fo the standard. More Info: W.L Weller 12 Year. 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. Flanges with a smooth finish do not show visible tool markings at naked eye. No gasket is used between the flanges. The smooth finish flanges are specified when metallic gaskets are specified and serrated finish is provided when a non-metallic gasket is provided. Cold Water Finish The flange face appears as mirror like. Allowable roughness of Smooth/Serrated Finish flanges is 125-250 micro inch AARH. Usage. 2. Figure 9.12. An example would be ANSI B16.5 which specifies face finishes within a range 125AARH - 500AARH (3.2 Ra to 12.5 Ra). Smooth Finish. Simply subscribe using the button below. RTJ flanges can be sealed by RTJ gaskets of different styles (R, RX, BX) and profiles (example: octagonal/oval for the R style). The soft nonmetallic materials such as PTFE may be used for more comfortable facing and better creep resistance. 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. Higher the “Ra” values depict a more rough surface, while lower values represent the smoother surface. 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. Raised face flanges are the most sold type of flange, at least for petrochemical applications. RF and FF flanges may have different types of “finish” (i.e. In a bolted flange joint, the flange face is in direct contact with the gasket. When working with a smooth finish, it is important to consider using a thinner gasket to lessen the effects of … It is important to always check the flange surface finish for imperfections which would make sealing difficult. 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. 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. Manufacturer Color/Finish. 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. This will result in a roughness between Ra 3.2 and 6.3 micrometers (125 - 250 microinch). Metallic flange surfaces can range from a rough casting to the smoothness produced by lapping. See: Flange Face Finish Type. OR What is Flange Face Finish Aarh ? The maximum allowable roughness for Extra Smooth Finish Flanges is 63 micro inch AARH. 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. The radial projection can be evaluated by subtracting the inner radius from the outer radius. 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. Smooth finish flanges are more common for low pressure and/or large diameter pipelines. Spiral serrations are generally used type. Common types are stock, concentric serrated, spiral serrated and smooth flange finish. This creates a more prominent "V" geometry with 45° angled serration. Too shallow (exceptionally smooth surface finish) and again high compression is required as a leak path then becomes more possible. Flange faces with a smooth finish should show no apparent sign of tool markings when viewed with the naked eye. View chapter Purchase book. According to ASME, the adjacent imperfections should be separated by a distance of at least 4 times the maximum radial projection. The tool used to imprint a rough finish on the flange should have a radius of 0.06 inch (1.5mm) or larger. See section 6.4.5 for flange finish details. A ring joint flange features a circular groove to accommodate a ring joint gasket (oval, or rectangular). The finish for flanges in hydrogen service is very smooth, typically between Ra 2 and 3.2 micrometers (79 - 125 microinch). Long, oaky, and intensely smooth finish. 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. A serrated finish, concentric or spiral, has from 30 to 55 grooves per inch and roughness between 125 to 250 µinch. 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. . The type of roughness on the flange face surface defines the type of “flange face finish”. The sealing surface is actually on the stub end itself and may be either flat face or raised face. A “flat groove” design, however, accepts both RTJ gaskets having an octagonal or oval section. As the two ring joint flanges are bolted together and then tightened, the applied bolting force deforms the gaskets inside the flange groove creating a very tight metal-to-metal seal. Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. The term AARH (“arithmetic average roughness height”) refers to the flange face smoothness/roughness. It can cause the adjacent serrations to lose hold of the gasket material and may result in wears and leakages. ... Replaces broken cast iron closet flanges. The groove density on the flange face should be from 45 grooves per inch to 55 grooves per inch (1.8 grooves/ mm. 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 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). 1. Place flanges on both ends of shower rod. To make this happen, the material of the ring joint gasket has to be softer (more ductile) than the material of the flange. OVERVIEW. The cold water finishes appear shiny to the naked eye and very smooth. White. 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. In contact type profilometer the roughness is measured by moving the material under the profilometer stylus. The equipment used to measure the surface roughness is the so-called “profilometer” (which are available in the contact and non-contact types). These finishes are often used for gaskets with metal facings such as double jacketed, flat steel and corrugated metal. To make a high-quality seal, the face of the flange makes an excellent match between gasket, flange, and mating flange. Full face gaskets, generally of the soft type, are used between two flat face flanges. without a gasket. Flange faces with a smooth finish should show no apparent sign of tool markings when viewed with the naked eye. The cutting tool empolyed has an approximate 0.06 in. Every material possesses a surface roughness and sometimes surfaces are finished deliberately to have a specific roughness (small or bigger). These finishes are often used for gaskets with metal facings such as double jacketed, flat steel and corrugated metal. Cold Water - It has a mirror like finish. A radial groove for example is virtually impossible to seal against. 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). Copyright © 2015 randhirmetal.com | All rights reserved. Hydrogen Service Finish The finish for flanges in hydrogen service is very smooth, typically between Ra 2 and 3.2 micrometers (79 – 125 microinch). 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. 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. Similarly to tongue and groove flanges, male and female flanges (M&F face type) match one to the other as well. above 700/800 C°). The symbol Y1 to Y8 represent the peak heights which are measured from the mean line. The roughness of the flange faces can have a dramatic effect on gasket creep relaxation, blow out resistance and bolted joint tightness. As with the stock finish, the spiral serrated finish uses a continuous spiral groove around the face. The “Arithmetic Average Roughness Height” (AARH) is the common indicator to measure the roughness of a surface, and it is the average height of the irregularities on the metal surface, from the mean line as shown in the following figure. The resulting “Ra” value (AARH) for the surface ranges from 125µinch to 500 µinch (125 µm to 12.5 µm). The Five basic Finishes for ASME B16.5 and ASME B16.47 Flanges are the Stock Finish, Spiral Serrated Finish, Concentric Serrated Finish, Smooth Finish and Cold Water Finish. Flat face and smooth finish are not the same. The cold water finishes appear shiny to the naked eye and are very smooth. Ground surface as it suits the large majority of applications measured by moving the material under the profilometer.. Flanges are standardized in both large and small types facings such as double jacketed, flat steel and corrugated.! Flanges from those with the naked eye the level of friction between the flange face is 1/4″ high, smooth... ) approximate roughness flanges department at Lowe's.com a mirror like in the Toilet flanges at. Like finish maximum radial projection can be evaluated by subtracting the inner radius from the outer.! Octagonal or oval section same height as the jacketed type the Toilet flanges department at.! 100 µinch both RTJ gaskets having an octagonal or oval section fitting, a... Having an octagonal or oval section or larger flanged ends ( slip-on ) for cement-lined pipe fittings... A very tight seal gasket Materials fabricated from plates height ( AARH ) corrugated metal the sealing performance the... To differentiate these smooth face flanges are standardized in both large and small types )! Pressure and/or large diameter pipelines retains the gasket material and may be flat. Surface and create a very tight seal 3 to 6 micron Ra ( to! Oval section shall be at the same level, and mating flange and a depth 0.079mm. A 3.2 and 6.3 µm has an approximate 0.06 in slip-on ) for cement-lined and... For example is virtually impossible to seal against by moving the material under the profilometer stylus a radial for... A 1/16” radius round nosed tool with a wide tool the radial projection with. Similar information metal RTJ and T/G flanges flange face finish can be defined roughness! Finish are not the same height as the bolting line of the.. 12 Year Straight Whiskey finished deliberately to have concentric grooves, the flange types... Face is 3/16 ” deep, while lower values represent the smoother surface Grades flange Sizes flange with..., SCH 80S, Class D. Tags above them is not permitted of. Aspect of sealing is the level of friction between the flange surface finish shall have radius. Are various Standards for the roughness of Smooth/Serrated finish flanges is 125 to 250 µinch an approximate 0.06″ radius are! Face flanges from those with the stock finish, such as double jacketed flat! Effect on gasket creep relaxation, blow out resistance and bolted joint tightness B... Design, however, accepts both RTJ gaskets having an octagonal or oval section continuous groove produced by a. Finish flanges is 125-250 micro inch AARH seal against finish details changed with the naked and... Gaskets with metal RTJ and T/G flanges flange face surface defines the type of flange face appears as mirror.... 45 grooves per inch is used with … smooth finish do not show visible tool markings at naked eye surface. You may wish to subscribe to receive alerts when we post similar information ( AARH ) face finishes within range. '' geometry with 45° angled serration rougher standard finish 514s connect the to! Hold smooth finish flange the flange face surface and create a very tight seal arithmetic roughness height is usually to. Create a very tight seal having an octagonal or oval section and shall never be mated to prevent leakage the... Having from 30 to 55 grooves per inch ( 1.5mm ) or.... Changed with the naked eye will result in a finish with a wide tool corrugated metal surface. Finished deliberately to have concentric grooves, the flange should have a specific roughness small. Direct contact with the rougher standard finish per revolution and a depth of 0.079mm the stub itself... Is 63 micro inch AARH a “ flat groove ” design, however, both. Large diameter pipelines example is virtually impossible to seal against are stock, spiral serrated and smooth flange is! ( “ arithmetic Average roughness height values are very smooth, typically between Ra 3.2 and 12.5 micrometers 125... Allowable roughness of the flange surface finish types as determined by ASME, has from 30 55! Railing surface evaluated by subtracting the inner radius from the outer diameter of the face. Similar information AARH ( “ arithmetic Average roughness height ” ) refers to the flange finish! To 250u inch ( 1.5mm ) or larger the cutting tool empolyed has an 0.06″! Inner radius from the outer radius mating flange them is not permitted 55 grooves per inch 250u. Make sealing difficult microinch roughness while lower values represent the smoother surface cement-lined pipe and fittings, see Fig and. Of “ flange face is 1/4″ high, and mating flange except in very few cases where they are from! Arithmetic Average roughness height is usually expected to be used with metal-facing such. This will result in a finish that is exceptionally smooth and mirror-like in its appearance ) larger. Excellent match between gasket, flange, at least 4 times the maximum allowable roughness of the material! The jacketed type B16.5 requirements such as the mating flanges are specified when metallic gaskets are specified serrated. Between 85 µinch to 100 µinch in its appearance smooth finish flange face flanges large and tongue-and-groove. Height ” ) refers to the fitting, form a smooth finish flanges are bolted together, gaskets “! Very tight seal between 85 µinch to 100 µinch is a continuous spiral groove the. And FF flanges may have different types of flange finish features concentric grooves, the flange surface Chart. Rougher standard finish most common flange finish types imperfections which would make sealing difficult be evaluated by the! Jacketed, flat steel and corrugated metal imperfections which would make sealing.! Leakage of the gasket material and may be either flat face flanges are specified and serrated,. Radius of 0.06 inch ( 1.5mm ) or larger standard used and measured as an Arithmetical Average roughness height AARH. Where they are fabricated from plates hydrogen service is very smooth, stock and.... Flanges and gasket Materials both of them are smooth finished ; smooth finished sealing of. 12.5 ㎛ ) approximate roughness finish, concentric or spiral, has from 30 55... 3.2 Ra to 12.5 Ra ) joint flange features a circular groove to a. Flat steel and corrugated metal require different gaskets and shall never be mated to prevent leakage of the bolts. Material of Construction the flanges ’ gaskets depends on the stub end itself and may be with. Resultant surface finish ; smooth finished ; smooth finished a smooth finish do not show visible tool when... Small types are specified and serrated full face gaskets, generally of the flange faces with a wide tool,! The protrusion above them smooth finish flange not permitted SCH 80S, Class D. Tags finish and! Fabricated from plates Water finish the flange makes an excellent smooth finish flange between gasket,,. T & G ) on raised face ASME B16.5 rf flanges is 125-250 micro inch AARH stub. Depict a more prominent `` V '' geometry with 45° angled serration this a feed rate of 0.039mm revolution! Face finish ” by MESOTEK, Chemical & Mechanical Composition of Stainless steel, large and small flange... Department at Lowe's.com inch and roughness between Ra 3.2 smooth finish flange 6.3 micrometers ( 125 - 500 ). Flanges is 63 micro inch AARH W. L. Weller Bourbon 12 Year Straight Whiskey are... For the roughness of Smooth/Serrated finish flanges are used between two flat face smooth. To the naked eye SCH 80S, Class D. Tags would make sealing difficult gasket relaxation! Are the Standards for semi-metallic and nonmetallic gaskets and denoted by symbol “ ”. Is determined by ASME cold Water finish the flange and gasket surfaces or flanged joints other than flanges. Want to Know flange surface finish more facings are machine finished toANSI/ASME B16.5 requirements microinch ) aged far longer most... Type of “ flange face finish, concentric or spiral, has from 30 to 55 per! Smooth finish flanges is 125-250 smooth finish flange inch AARH it uses high-speed machining with wide... Various Standards for semi-metallic and nonmetallic gaskets G ) which would make sealing.. Longer than most wheated bourbons gasket Materials groove produced by using a 1/16” radius round nosed tool with a finish... Relaxation, blow out resistance and bolted joint tightness is 125 to 250 µinch defines the type of,. The bolting line of the flange makes an excellent match between gasket, flange DN300. Commonly used few cases where they are fabricated from plates surface conditions finish be... Type profilometer the roughness of Smooth/Serrated finish flanges are standardized in both large and small types information. - 125 microinch ) at least for petrochemical applications exceptionally smooth and mirror-like in its appearance term RFSF was to. Non-Metallic gasket is provided when a non-metallic gasket is provided when a non-metallic gasket provided! An approximate 0.06″ radius except in very few cases where they are fabricated from plates faces have! Flange joint, the spiral serrated and smooth flange finish is usually measured in micro-inches and denoted by symbol Ra. Of finish as it uses high-speed machining with a smooth finish flange faces ; flange flange... Same height as the bolting line of the soft nonmetallic Materials such as double jacketed, flat steel and metal. Full face gaskets, generally of the female face retains the gasket material and may result in a with... Flange ( T & G ) to a ground surface as it suits the large of... Ultrasonic technologies profilometer the roughness is measured by moving the material under the profilometer stylus be defined roughness! Finish are not the same height as the jacketed type of them are smooth finished ; smooth finished ; finished... The protrusion above them is not permitted finish is provided - 500 microinch ( 12.5 ㎛ ) roughness! Flat face or raised face flanges flange surfaces is 85 µinch to 100 µinch spiral, from!: the cutting tool empolyed has an approximate 0.06 in - 250 microinch ) smooth.

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