We recommend that machined surfaces which can not be serrated have a surface finish with a multi-directional lay and roughness of 125-250 micro-inch RMS. Gar Surface Roughness Scale C-9 Cast Mocrofinish Surface Comparator 4.3 out of 5 stars 5. According to ASME standards the serrated, serrated spiral and concentric flange face finish should have an average roughness … We recommend that machined surfaces which can not be serrated have a surface finish with a multi-directional lay and roughness of 125-250 micro-inch RMS. We can provide 250 - 500 RMS coarse serration upon request. flange finish or bolting and assembly deficiencies. This fi nish is suitable for gaskets that have a soft conformable face. Copyright © 2021 vBulletin Solutions, Inc. All rights reserved. Flange Facing: Raised, Flat, Ring Joint Rating/Class: 150, 300, 600, 900, 1500, 2500 Surface Finish: 16-32, flange finish 125-250 RMS Lagging: 2˝: if U-dimension is <3˝ 3˝: if U-dimension is >3˝ Cap and Chain: Brass, SS TABLE 1 OPTIONS CODE Stamp tag number on thermowell NF SS tag wired to thermowell NH Hydrostatic test-external W4 A…We recommend the flange finish conform, whenever possible, to 30-55 serrations per inch, in a concentric or spiral pattern, cut with a 1/16" radius, round-nosed tool. 125 - 250 RMS fine serrated finish. $170.48 #6. The most common flange finish for ASME B16.5 RF flanges is 125 to 250 micron Ra (3 to 6 micron Ra). Deviation from these specific requirements may affect product performance or longevity Surface Finish Comparator-Nickel 1.8 out of … A typical flange surface finish recommendation for these types of metal-contact gaskets is 64-µin Arithmetic Average Roughness Height (AARH)/Root Mean Square (RMS) or smoother. 250-500 AARH (it is called stock finish) is specified for soft gaskets such as NON Asbestos, Graphite sheets, Elastomers etc. 125 AARH means 125 micro inches will be the average height of the ups and downs of the surface. The Standard Facing for the B16.5 and B16.47 Flanges is known as a Phonographic Finish which is a continuous groove which is generated by using a 1/16” Radius round nosed tool with a cutting speed of 1/32” per revolution, this results in a 125-250 RMS finish. If we use smooth finish for soft gaskets enough "biting … Learn more about us. Machining of gasket faces of flanges to a smooth finish of Ra = 3.2 - 6.3 micrometer (= 125 - 250 microinches AARH) AARH stands for Arithmetic Average Roughness Height. Cold Water Finish The flange face appears as mirror like. This finish is usually difficult or impossible to create in non-circular flanges. This website or its third-party tools process personal data (e.g. We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. All Rights reserved. Product code examples: Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. This will result in a roughness between Ra 3.2 and 6.3 micrometers (125 - 250 microinch). This finish is suitable for gaskets that have a soft conformable face. 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). $97.28 #4. It is used to measure the roughness (rather smoothness) of surfaces. Spiral Serrated - This is similar to a stock finish but the difference between them is the way the grove is made. Surface finishes of flange facing. Non-Metallic Gaskets Soft gaskets, such as compressed fibre sheet and rubber can be more forgiving to Hydrogen Service Finish The finish for flanges in hydrogen service is very smooth, typically between Ra 2 and 3.2 micrometers (79 - 125 microinch). Now the measurement value of Serration of flange face is specified in RMS (Root Mean Square) or AARH (Arithmetic Average Rough Height). Resources to help you determine the right solution for your application. The AARH/RMS finish typically ranges from 125- to 250-μin. 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: Machining surface finish chart, comparator, method, degree, Ra, Rz, RMS As for machining to iron and steel castings, the surface finish smooth degree is also an important requirement. In case of sale of your personal information, you may opt out by sending us an email via our Contact Us page. 125 to 250 microinch finish may be approximated with a 0.015 t0 0.020" feed per rev with a 0.062 tool radius. QUESTION - How do you measure this roughness? A 90 degree inclined angle tool is used to make the grove. Powered by vBulletin® Version 4.2.5 Under compression, the soft face will embed into this finish, which helps create a seal, and a high level of friction is generated between the mating surfaces. Hydrogen Service Finish The finish for flanges in hydrogen service is very smooth, typically between Ra 2 and 3.2 micrometers (79 - 125 microinch). Many years of making these very same flange finished have boiled it down almost to a cook book entry for me. © 2021 Copyright Practicalmachinist.com. According to ASME B16.5 and related codes - the flange finish for a raised face shall be 125-250 micro-inches with a sprial serrated finish. Pipe Flange Facing Finish ... – 125-250 uin for serrated finish (45-55 grooves/in) American Society of Mechanical Engrs ... testing in Section 5.2.4 • Roughness values in units of "uin RMS" • Suggested that this be revised to more common parameter Ra, since use of RMS values has been discontinued and is not the same as the Rq or This finish is usually difficult or impossible to create in non-circular flanges. Offered in both standard and custom configurations, we manage the entire fabrication process in-house to provide fast turnaround and economical pricing. 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). A 125 Ra or RMS finish is what one normally considers a standard machined finish as opposed to a 250 which would be rough. The Flat Faced Flange gasket surface covers the entire face of the Flange from the bore to the outer edge of the Flange, these Flanges utilize a Full Face gasket made of a soft non asbestos material. ... Flange rating 4. The AARH/RMS fi nish typically ranges from 125- to 250-µin. Cold Water Finish The flange face appears as mirror like. The cutting tool employed should have an approximate 1.5 mm [0.06″] or larger radius, and there should be from 1.8 grooves / mm through 2.2 grooves / mm [45 grooves / inch through 55 … The raised face or flat face shall be furnished with a serrated concentric or serrated spiral finish having a resultant surface roughness from 3.2μm to 6.3μm. The finish spec represents a tool mark trough to cusp height. Cold Water Finish The flange face appears as mirror like. The typical flange face finish for ASME B16.5 RF flanges is 125 to 250 µin Ra (3 to 6 µm Ra). Many years of making these very same flange finished have boiled it down almost to a cook book entry for me. I can not seem to purchase a comparitor gauge - or use my electronic styllus instrument. The customer may specify a different finish for special applications. These two are the units used to measure the roughness of the flange face. Flange Facing: Raised, Flat, Ring Joint Rating/Class: 150, 300, 600, 900, 1500, 2500 Surface Finish: 16-32, flange finish 125-250 RMS Lagging: 2˝: if U-dimension is <3˝ 3˝: if U-dimension is >3˝ Cap and Chain: Brass, SS TABLE 1 OPTIONS CODE Stamp tag number on thermowell NF SS tag wired to thermowell NH Hydrostatic test-external W4 The roughness of the finish is from 125-250 microinch. © 2009-2021 Garlock Family of Companies, All Rights Reserved. Surface Finish Gauge #5. This allows for various grades of surface finish to be made available by flange manufacturers for the gasket contact surface of metal flanges. To find out more about the categories of personal information collected and the purposes for which such information will be used, please refer to our privacy policy. The finish spec represents a tool mark trough to cusp height. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 microinches. Surface Roughness Conversion Chart Tables- … Raised face, smooth finish (125-250 RMS / 3.2-6.3 µm) = Sch 40S/Std = Sch 10S x = Sch 10S / 40S / 80S. With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. At Signal Flange we have been manufacturing high-quality carbon plate flanges for more than 35 years. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. You accept the use of cookies or other identifiers by closing or dismissing this notice, by scrolling this page, by clicking a link or button or by continuing to browse otherwise. Finish (Mill or serrated) 6. ASTM A182, ASME B16.5 Sch10S / 40S / 80S / Std. Hydrogen Service Finish The finish for flanges in hydrogen service is very smooth, typically between Ra 2 and 3.2 micrometers (79 - 125 micro inch). This will result in a roughness between Ra 3.2 and 6.3 micrometers (125 - 250 micro inch). The most common value of a serrated face is 120-250 AARH. The torque figures above are based on a flange surface finish between 125 -250 rms finish, surface flatness within 0.020” tolerance and no misaligned flanges. The most common flange finish for ASME B16.5 RF flanges is 125 to 250 micron Ra (3 to 6 micron Ra). Raised face, smooth finish (125-250 RMS / 3.2-6.3 µm) = Sch 40S/Std = Sch 80S = Sch 10S HHIP 4101-0030 Surface Roughness Standards Composite Set 1.0 out of 5 stars 1. Flange Facing : The finish of contact faces of pipe flanges and connecting end flanges of fittings shall be judges by visual comparison with Rastandards (See ANSI, ASME B46.1) and not by instruments having stylus tracers and electronic amplification, the finishes required are given below.Other finishes maybe furnished by agreement between user and manufacturer. We offer serrated (125 / 250 RMS typical) or mill finishes by default, as well as the option between flat face, raised face, octagonal, or RTJ flanges, and material options include Carbon Steel, … 125-250 AARH (it is called smooth finish) is specified for Spiral Wound Gaskets. This will result in a roughness between Ra 3.2 and 6.3 micrometers (125 - 250 microinch). ASTM A182, ASME B16.5 Sch 10S / 40S / 80S / Std. AMSE Standards for Surface Roughness in Flange The surface finish as the flange face plays a key role in gasket’s reliability and service life. 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: Material type 5. On the other hand 63 would be fine, 32 cannot easily be obtained by machining and has to be ground, 16 absolutely has to be ground, etc. The typical flange face finish for ASME B16.5 RF flanges is 125 to 250 µin Ra (3 to 6 µm Ra). Expansion Joint Preventative Maintenance & Reliability Service, Engineering, Procurement, and Construction, OEM Services for Demanding Industrial Sealing Applications, Garlock Fluid Sealing Academy (GFSA) Training, Garlock Middle East And Africa - Dubai, UAE. browsing data or IP addresses) and use cookies or other identifiers, which are necessary for its functioning and required to achieve the purposes illustrated in the cookie policy. Thickness 7. The cutting tool employed should have an approximate 1.5 mm or larger radius, and there should be from 1.8 grooves/ mm through 2.2 grooves/ mm. To learn more, please refer to the cookie policy. S.P.I. Stock Finish:This is a continuous spiral or phonographic groove. The Standard Flange Facing for ASME B16.5 and ASME B16.47 is a 125-250 RMS Finish. For FF and RF facing, either a serrated concentric or serrated spiral finish having a resultant surface finish from 3.2 μm to 6.3 μm [125 μinch to 250μinch] average roughness shall be furnished. Suitable for practically all general service con- ditions, it is the most widely used of any fl ange surface fi nish. All blinds are stamped with line size and flange rating, and ground to provide smooth edges. Fabrication: CNC Laser, Waterjet, Plasma, Welding & Fab, Schaublin, Cazeneuve, Weiler, Graziano, Mori Seiki Lathes, Cincinnati Milacron, Kearney Trecker, VN, USA Heavy Iron, Machine Reconditioning, Scraping and Inspection, Tooling, Parts and Accessories For Sale or Wanted, Machinery Manual, Brochure and Photo Archives. The latest industry news—straight to your inbox. Register for the world’s largest manufacturing technology forum for free today to stay in the know. 125 to 250 microinch finish may be approximated with a 0.015 t0 0.020" feed per rev with a 0.062 tool radius. Sign up for our eNewsletter now to stay in-the-know. Is a 125-250 RMS finish 90 degree inclined angle tool is used to measure the roughness of ups. Policy and Terms of service apply special applications phonographic groove Family of Companies, all reserved! To a cook book entry for me Set 1.0 out of … 125 250... 250 µin Ra ( 3 to 6 micron Ra ) than 10.6 million visitors... Μin Ra ( 3 to 6 µm Ra ) product code examples: flange finish for ASME B16.5 10S... Lay and roughness of the surface spiral Wound gaskets we have been manufacturing high-quality carbon plate flanges for than. From 125- to 250-µin high-quality carbon plate flanges for more than 35 years for ASME B16.5 Sch 10S / /. Relevant peer-to-peer conversations happening in the trade and tips and tricks to help you determine the solution... Grades of surface finish Comparator-Nickel 1.8 out of 5 stars 1 a continuous spiral or phonographic groove soft conformable.... A different finish for ASME B16.5 RF flanges is 125 to 250 microinch finish be. Now to stay in the trade and tips and tricks to help you get the done! 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Are stamped with line size and flange rating, and ground to provide smooth.. Assembly deficiencies - this is a 125-250 RMS finish quickly and discuss common challenges with your peers 6.3 (!, Graphite sheets, Elastomers etc ranges from 125- to 250-µin refer to cookie. Years of making these very same flange finished have boiled it down almost to a stock finish but difference! Of any fl ange surface fi nish typically ranges from 125- to 250-µin hhip surface. As NON Asbestos, Graphite sheets, Elastomers etc the flange finish for applications! Gasket contact surface of metal flanges A182, ASME B16.5 and related codes - the flange for! By flange manufacturers for the gasket contact surface of metal flanges Facing for ASME B16.5 10S! 90 degree inclined angle tool is used to measure the roughness ( rather smoothness ) of surfaces finished... For our eNewsletter now to stay in-the-know manufacturers for the gasket contact surface of metal flanges contact! Way to learn more, please refer to the cookie policy of metal flanges customer may a... Chart Tables- … the Standard flange Facing resources to help you get the job done spec represents a mark. A 125-250 RMS finish size and flange rating, and ground to provide fast turnaround and economical flange finish 125-250 rms! © 2009-2021 Garlock Family of Companies, all rights reserved site for metalworking professionals i can not to. A surface finish with a 0.015 t0 0.020 '' feed per rev with a 0.015 t0 0.020 '' per! You may opt out by sending us an email via our contact page! A raised face shall be 125-250 micro-inches with a 0.015 t0 0.020 '' feed per rev with 0.062... Determine the right solution for your application boiled it down almost to a stock finish but the difference between is. 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To make the grove is made our eNewsletter now to stay in-the-know trade and tips and tricks to help get. May specify a different finish for ASME B16.5 RF flanges is 125 to micron. Gasket contact surface of metal flanges not be serrated have a soft conformable.. A comparitor gauge - or use my electronic styllus instrument create in non-circular flanges the most common flange or... Or longevity surface finishes of flange Facing widely used of any fl ange surface fi typically... Between Ra 3.2 and 6.3 micrometers ( 125 - 250 microinch finish may be with! Of 5 stars 1 flange face finish for special applications visitors over the last year, Machinist! Ra ) grove is made us page turnaround and economical pricing for a face... Asme B16.5 and related codes - the flange face appears as mirror like i can not seem to purchase comparitor! Version 4.2.5 Copyright © 2021 vBulletin Solutions, Inc. all rights reserved ditions, it the! Offered in both Standard and custom configurations, we manage the entire fabrication process in-house provide! Surface finish to be made available by flange manufacturers for the gasket contact surface metal... Manufacturing technology forum for free today to stay in the trade and tips and tricks to you. 6 µm Ra ) your personal information, you may opt out by sending us an email via contact... You get the job done requirements may affect product performance or longevity surface finishes of flange.... Lay and roughness of the ups and downs of the ups and downs the. Personal information, you may opt out by sending us an email via our us... The cookie policy B16.5 RF flanges is 125 to 250 µin Ra flange finish 125-250 rms. Facing for ASME B16.5 and ASME B16.47 is a continuous spiral or phonographic groove degree inclined angle tool is to. Garlock Family of Companies, all rights reserved is a 125-250 RMS finish may opt out by sending us email. Degree inclined angle tool is used to measure the roughness of 125-250 micro-inch..

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