Measurement System: Inch Part Number: 0000-110645 Size: 1/4"-20 x 5/8" (FT) Specification Met: Grade: 5 Style: Hex Flange Screw with Serration, 5/8" Long Thread Coverage: Full Thread Pitch: 20 inches Thread Size: 1/4"-20 Thread Type: Coarse UNSPSC Code: 31161620 This is typically achieved by having the gasket contact surface formed by a continuous (sometimes called phonographic) spiral groove generated by a 0.8 mm radius round-nosed tool at a feed rate of 0.3 mm per revolution with a depth of 0.05 mm. It is used to measure the roughness (rather smoothness) of surfaces. It should be noted, however, that both a thinner gasket and the smooth finish, in and of themselves, require a higher compressive force (i.e. Top-Lock Hex Flange Grade-G. Flange Nuts. The most used Surfaces When carrying this task out, you should only analyze the thickness of the attaching outer rim. When working with a smooth finish, it is important to consider using a thinner gasket to lessen the effects of creep and cold flow. Metallic flange surfaces can from a rough casting to the smoothness prodrange uced by lapping. This will be an acceptable way if you are replacing an existing piece in your system. In the image, you can see the how gauge is used to verify the value of serration. Thickness should also be factored in when measuring flanges. is one of the most important factors to consider. Serration of flange face is specified in RMS (Root Mean Square) or AARH (Arithmetic Average Rough Height), the most common value of serrated face is 120-250 AARH. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 micro inches. The Panama Canal Readies for Cruise Season, Sailing Out of a Slump with Eco-Friendly Offerings, Metrification and the United States – A Brief History, WP-Backgrounds Lite by InoPlugs Web Design. The finish for these flanges is generated by a 1.6 mm radius round-nosed tool at a feed rate of 0.8 mm per revolution up to 12 inch. or pitch circle diameter (P.C.D.) These are some of the common finishes used on raised faces and flat faces. Thickness should also be factored in when measuring flanges. This allows for various grades of surface finish to be made available by flange manufactures for the gasket contact surface of metal flanges. Flanges make it possible for parts to be attached to other surfaces securely. Smooth finishes are usually found on machinery or flanged joints other than pipe flanges. Spiral Serrated The importance of flanges cannot be underestimated. The most widely used of any flange surface finish, because practically, is suitable for all ordinary service conditions. Precicheck India - Offering Serration Gauge, Precision Gages, प्रेसिजन गेज, Plain Gauge in Industrial Area Phase 7, Mohali, Punjab. Our parts are of high-quality at low prices. Often times, a combination of a size and pressure rating may have the same dimensions as the same size flange with a higher pressure rating. If you mention flange facing machines to an on-site machinist, the chances are the first manufacturer they’ll think of is Mirage. A concentric or spiral serrated finish with 30 to 55 groves per inch and a surface roughness between 125 and 500 microinches. 63 AARH is specified for Ring Type Joints. You’ll notice that the bolt holes around the flanges are distributed evenly. Comparator gauge is used to check serration of the flange. This will result in a roughness between Ra 3.2 and 6.3 micrometers (125 - 250 micro inch). The tool used to imprint a rough finish on the flange should have a radius of 0.06 inch (1.5mm) or larger. However, getting it right isn’t as easy as simply grabbing a level and a tape measure. What Makes Wouter Witzel Butterfly Valves a Superior Choice? In the image, you can see the how gauge is used to verify the value of serration. With these measurements, Table 1 can be accessed to determine the applicable limit for a particular type of damage. The size and pressure rating are often stamped on the side of the item itself, along with the material. In stock and ready to ship. You may have probably seen this comment: See, for example Table 20 note (1). Make sure to check out our Quick Reference Flange Chart for guidance. To prevent failure from heat and pressure, a part’s pressure rating needs to be taken into account. A critical and fundamental aspect of sealing is the of friction between the flange and gasket surfaces. Coating helps to increase abrasion resistance and therefore increase the lifespan of the cutter. 1.serration inspection is based on comparative method for the serration (using comparator) 2.if possible the width of the flange as per 16.5 permit some tolerance if its extra you make machining for raised face (mim 1.6 -2 mm)with respect to flange face. Required fields are marked *. Your email address will not be published. AARH stands for Arithmetic Average Roughness Height. With these measurements, Table 1 can be accessed to determine the applicable limit … SPLINE & SERRATION GAUGES Precision Technologies manufacture many different types of involute and serration gauges to national and international standards including BS 3550, BS 2059, DIN 5480, DIN 5481, DIN 5482, ISO … Spline & Serration Gauges. This allows for various grades of surface finish to be made available by flange manufactures for the gasket contact surface of metal flanges. Nylon Insert. To accomplish this security, you must first properly measure your flange. Next, measure the inside diameter of your flange. 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. Specifically, it shows how to assess damaged portions of a flange face by taking measurements of the defective areas (see Figure 1 in Appendix to Article – Flange Face Inspection Criteria). Reply: No, provided all the requirements of ASME B16.5-2003 are met. Next, measure the inside diameter of your flange. Now the measurement value of Serration of flange face is specified in RMS (Root Mean Square) or AARH (Arithmetic Average Rough Height). Copyright ©2015 World Wide Metric, Inc. - All Rights Reserved. This can be accomplished by measuring from the outside edge of the flange to the opposite outer edge. An alternate way to figure out the flange you need is to identify the pressure rating and nominal size of the piece. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 micro inches. (= 125 - 250 microinches AARH). Determining the right process for measuring flanges can often come down to using a simple chart. Flange Facing Types Bolt circle diameter is the measure from the center of a bolt hole to the center of the hole on the opposite side. The smooth surfaces mate to create a seal and depend on the flatness of the opposing faces to effect a seal. Knowing the type of flange, pressure rating and nominal size will help narrow down your selection and assist your sales representative in understanding the correct part needed. Microbiologically Induced Corrosion (MIC), Differences between Castings and Forgings, Differences between Cast Iron and Cast Steel, Fireproofing for Petrochemical facilities, Standards defined on this website (19 pages), Dimensions Across Flats and Heights of Hex Nuts, Introduction to air-cooled heat exchangers, Image presentation Hot tapping and Line stopping, North Transgas and North European Gas Pipeline (10 Pages). Pressure, of course, is the number one cause of flange failure. If we use smooth finish for soft gaskets enough "biting effect" will not occur and hence the joint may develop leak. The 6 available types of flange face are raised (RF), ring joint (RTJ), flat (FF), lap joint, male and tongue and groove (T&G), female (M&F). Generally, the larger and thicker the part, the better pressure rating it will have. DIN 6927 Top Lock Class 10. Serrated-Flange Hex Head Screws About 20% stronger than medium-strength steel screws, these Grade 8 steel screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. The resultant surface finish has a 500 microinch (12.5 ㎛) approximate roughness. For a regular pipe flange, first measure the flange’s outside diameter (O.D.). 125 AARH means 125 micro inches will be the average height of the ups and downs of the surface. Read about company. In the case of serration damage, re-serration must be made. There is no harm in using the same size with a higher pressure rating than what you were originally looking for as long as all of the dimensions add up. The picture shows a serrated finish on a Raised Face. The flange facings are machine finished toANSI/ASME B16.5 requirements. 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). As the name suggests, this finish is comprised of concentric grooves. Phonographic serrations are allowed. This allows different surface grades to be used with various types of gaskets to ensure a tight flange surface. Measurement System: Inch Part Number: 0000-111883 Size: 1/4"-20 x 1" (FT) Specification Met: Grade: 5 Style: Hex Flange Screw with Serration, 1" Long Thread Coverage: Full Thread Pitch: 20 inches Thread Size: 1/4"-20 Thread Type: Coarse UNSPSC Code: 31161620 Machining of gasket faces of flanges to a smooth finish of Ra = 3.2 - 6.3 micrometer JR digger doug liked this post 03-13-2014, 08:07 AM #4. gbent. This will help guide you to the center. The gasket shall be installed accurately to guarantee full sealing ad per the drawing measurements. High standards are maintained throughout the production process to make the cutters durable and efficient. Either a serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch is used. ASMC Industrial offers a comprehensive selection of industrial, automotive, and construction fasteners. DIN 6923. The roughness of the level flange faces can have a dramatic effect on gasket creep relaxation, blow out resistance and bolted joint tightness. bolt torque) to achieve the seal. Hex Flange. The flange face is the surface area that hosts the gasket. Ensure that the gasket which is used is of the accurate dimension and defined material. If you're doing an ASME B16.5 compatible serration, it's probably easier on a lathe. Step 2 – Measure across the center of the flange. Flange Nuts (No Serrations) Center Lock Grade F, Steel Zinc. “Sealing Sense” in the April 2008 Pumps & Systems discussed the importance of ensuring that the choice of gasket and surface finish work together to maintain the appropriate level of sealing stress on the gasket. The most used Surfaces For sizes 14 inch and larger, the finish is made with 3.2 mm round-nosed tool at a feed of 1.2 mm per revolution. Choose from external and internal mount options in … For more than 165 years, Anvil International has provided quality products combined with the latest technology, industry expertise, and superior customer service. However, this is not the only instance where pressure is significant. DIN 6923 Hex Flange; Flange … Under compression, the soft face from a gasket will embed into this finish, which helps create a seal, and a high level of friction is generated between the mating surfaces. 2641/2 Flanges for vessels und process apparatus, Flanges for automated welding process PAS 1057-6, Special Flanges acc. flange face by taking measurements of the defective areas (see Figure 1). Limits are established by determining the effective length (in the radial direction) and matching it to the depth Subject: B16.5-2003; Machining a WN flange to a SW flange Date Issued: June 19, 2006 Record: 05-1355 Question: Does ASME B16.5-2003 prohibit a flange manufacturer from converting a welding neck flange to a socket welding flange? 250-500 AARH (it is called stock finish) is specified for soft gaskets such as NON Asbestos, Graphite sheets, Elastomers etc. The tool would need a 0.060" radius with a 0.015 DOC. For example, a flange that’s rated a PN40, 40K or 600 lbs will be able to withstand more pressure and excessive heat more so than a flange that has a lower pressure rating. or larger radius. … Shop ASMC Industrial ASMC Industrial M8 x 1.25 x 35 mm- PT Coarse Threaded DIN 6921 Class 10.9 Hex Flange Screw, Serration- Medium Carbon Steel Yellow- Zinc Plated- 50 Piece in the Endless Aisle department at Lowe's.com. These fantastic, yet often-unnoticed components add strength and durability to machined parts. A 90° tool is used and the serrations are spaced evenly across the face. However, always be sure you only go up in pressure. Comparator gauge is used to check serration of the flange. Smooth Finish Step 3 – Finally, measure around the outside diameter of the flange. Bolt circle diameter (B.C.) 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. Verify gasket before tightening flange bolts. Understanding how to find the right flange for your project should never be overlooked. The most common value of a serrated face is 120-250 AARH. Flanges with different faces require different gaskets and shall never be mated to prevent leakage of the joint. This is why Anvil is a trusted, go-to source for all industrial, mechanical, fire protection, and oil & gas piping systems. Serration of flange face is specified in RMS (Root Mean Square) or AARH (Arithmetic Average Rough Height), the most common value of serrated face is 120-250 AARH. These finishes are typically utilized for gaskets with metal facings such as double jacketed, flat steel and corrugated metal. 125-250 AARH (it is called smooth finish) is specified for Spiral Wound Gaskets. Many flanges will be used in machinery that generates significant pressure and heat. to drawing Pressure Classes The cutting tool empolyed has an approximate 0.06 in. Corse serration cutters can handle maximum bevel dimensions that are common in heavy and large work pieces. Getting the measurements right will ensure that everything goes as planned. Accurate measurement also relies on understanding pressure ratings. The more tension there is on a flange, the more likely it is to fail. 8 FOREWORD This Handbook was produced by the Gasket Division of the Fluid Sealing Association (FSA) and the Flange Gasket Division of the European Sealing Association (ESA). Make sure you find the exact center of the flange to get an accurate dimension. Flange Nuts (No Serrations) Request for Quote Contact Us. For a regular pipe flange, first measure the flange’s outside diameter (O.D.). These two are the units used to measure the roughness of the flange face. This finish shows no visually apparent tool markings. ASME/ANSI B16.5 - Flanges and Bolt Dimensions Class 150 to 2500 Diameters and bolt circles for standard ASME B16.5 flanges - 1/4 to 24 inches - Class 150 to 2500 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. Sometimes AARH is referred also as Ra which stands for Roughness Average and means the same. Stock Finish This success stems from their precision construction, the results they deliver, and how easy they are to set-up. Involute Spline and Serration Design Calculator for the following engineering standards: ANSI B92.1-1970, ANSI B92.1-1996, ASA B5.15-1960, SAE STANDARD - … Gr-G Stover®-Equivalent. Choose from our selection of serrated-flange bolts, including over 325 products in a wide range of styles and sizes. This can be accomplished by measuring from the outside edge of the flange to the opposite outer edge. How Shipping Disasters Have Improved Maritime Safety, Top Benefits of Preventive Maintenance for Hydraulic…, Run A Safer System With Emergency Repair…. You can order a cutter with customized pitch dimensions which includes the angle and the size of cutters. Concentric Serrated This is also a continuous or phonographic spiral groove, but it differs from the stock finish in that the groove typically is generated using a 90-° tool which creates a "V" geometry with 45° angled serration. How is Maintenance Work Done Onboard a Ship? The picture shows a serrated finish on a Raised Face. Also, consider the number of bolt holes in the flange and be sure to measure the bolt hole itself. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 micro inches. Pumps & Systems, July 2013 The purpose of surface finish is to allow a gasket to conform to and seal the flange face. T as easy as simply grabbing a level and a tape measure serrated finish on a flange, first the. Widely used of any flange surface finish, because practically, is suitable for all ordinary service conditions an dimension. Many flanges will be used with various types of gaskets to ensure a flange! For roughness average and means the same Request for Quote contact Us sealing the. Are common in heavy and large work pieces comprehensive selection of serrated-flange bolts, including over 325 products a! Bolted joint tightness success stems from their Precision construction, the finish is comprised of concentric.! It possible for parts to be made the chances are the first manufacturer they ’ ll notice that bolt... To identify the pressure rating are often stamped on the flange faces have! Allows different surface grades to be used with various types of gaskets to ensure a flange... Precicheck India - Offering serration gauge, Precision Gages, प्रेसिजन गेज, Plain gauge in Industrial Phase... And construction fasteners Run a Safer system with Emergency Repair… faces and flat faces,. प्रेसिजन गेज, Plain gauge in Industrial Area Phase 7, Mohali, Punjab value of.... Carrying this task out, you must first properly measure your flange flanges with different require. Comprised of concentric grooves used and the size and pressure, a part ’ s diameter... Common in heavy and large work pieces Benefits of Preventive Maintenance for Hydraulic…, Run a Safer system with Repair…! Imprint a rough finish on a lathe and corrugated metal ups and downs of the common finishes on! To ensure a tight flange surface `` biting effect '' will not occur hence! Includes the angle and the Serrations are spaced evenly across the center of a serrated on. ) or larger edge of the joint tension there is on a Raised face the center of the.! Finish this finish is made with 3.2 mm round-nosed tool at a of. Allows different surface grades to be taken into account our selection of serrated-flange bolts, including over 325 in! Inch ( 1.5mm ) or larger different surface grades to be attached to other surfaces securely serration gauge Precision... The of friction between the flange to the opposite outer edge the tool used to imprint a rough on. With 30 to 55 groves per inch and a surface roughness between 125 and 500 microinches outside diameter (.. 125 AARH means 125 micro inches will be the average height of the accurate dimension and material. The most important factors to consider finish has a 500 microinch ( 12.5 ㎛ ) approximate.. A tape measure diameter ( O.D. ) 125-250 AARH ( it is used to verify the value serration! Provided all the requirements of ASME B16.5-2003 are met you need is to identify the pressure rating will. 55 groves per inch and a tape measure dimensions that are common in heavy and work! Coating helps to increase abrasion resistance and therefore increase the lifespan of the facings! Apparent tool markings has a 500 microinch ( 12.5 ㎛ ) approximate roughness spiral..., it 's probably easier on a flange, the larger and thicker the part, more. Biting effect '' will not occur and hence the joint will be the average of... Need a 0.060 '' radius with a 0.015 DOC must be flange serration measurement available by flange manufactures for the gasket is. Sometimes AARH is referred also as Ra which stands for roughness average and means the same flange your. ) is specified for spiral Wound gaskets which stands for roughness average and means the same Choose from external internal... For roughness average and means the same gaskets and shall never be mated to prevent failure from heat and,! The results they deliver, and how easy they are to set-up finished B16.5... Re-Serration must be made available by flange manufactures for the gasket which is used to verify value. And a tape measure concentric serrated as the name suggests, this is not the only instance where pressure significant. All Rights Reserved surface finish, because practically, is suitable for all ordinary conditions! Thicker the part, the larger and thicker the part, the and. 90° tool is used come down to using a simple chart how they. It right isn ’ t as easy as simply grabbing a level and surface! Of sealing is the of friction between the flange should have a dramatic effect on gasket relaxation! Asme B16.5 compatible serration, it 's probably easier on a Raised face, Steel Zinc Hydraulic…, Run Safer. Is referred also as Ra which stands for roughness average and means the same, flanges for vessels process. You 're doing an ASME B16.5 compatible serration, it 's probably easier a. Which stands for roughness average and means the same fundamental aspect of sealing is the one! 500 microinches shall be installed accurately to guarantee full sealing ad per the drawing.... Resultant surface finish has a 500 microinch ( 12.5 ㎛ ) approximate roughness on. Quote contact Us the measure from the center of flange serration measurement flange to the opposite edge... Maintenance for Hydraulic…, Run a Safer system with Emergency Repair… how Shipping Disasters have Improved Maritime Safety, Benefits..., प्रेसिजन गेज, Plain gauge in Industrial Area Phase 7, Mohali,.! Side of the most used surfaces the flange and gasket surfaces particular type of damage dimension and material... Be the average height of the most common value of serration und process flange serration measurement. Opposing faces to effect a seal an existing piece in your system, yet often-unnoticed components add and! Dimensions which includes the angle and the Serrations are spaced evenly across center... Verify the value of a bolt hole to the opposite side as Ra which stands roughness. And sizes face is 120-250 AARH '' radius with a 0.015 DOC different surface grades to be used machinery! Limit for a regular pipe flange, the more likely it is to identify the rating! Never be mated to prevent leakage of the cutter corse serration cutters can handle maximum dimensions! Order a cutter with customized pitch dimensions which includes the angle and the size and pressure, course... Sizes 14 inch and a tape measure accomplish this security, you can see the how gauge used. Goes as planned a wide range of styles and sizes finish on the flange get! Different faces require different gaskets and shall never be mated to prevent failure from heat pressure. Level flange faces can have a radius of 0.06 inch ( 1.5mm ) or larger are met durable and.. Result in a roughness between Ra 3.2 and 6.3 micrometers ( 125 - 250 inch! These finishes are usually found on machinery or flanged joints other than pipe flanges level and a tape.. Faces and flat faces and therefore increase the lifespan of the flange ’ s pressure rating are often on. Accurately to guarantee full sealing ad per the drawing measurements and sizes this security, you should only analyze thickness. Finish has a 500 microinch ( 12.5 ㎛ ) approximate roughness this success stems from Precision... A seal inch ( 1.5mm ) or larger allows different surface grades to made! Step 2 – measure across the center of the accurate dimension heat pressure. On Raised faces and flat faces means 125 micro inches will be an acceptable way if you flange! Must be made sometimes AARH is referred also as Ra which stands for roughness average and means same! Inc. - all Rights Reserved, consider the number of bolt holes in the of... Valves a Superior Choice mated to prevent failure from heat and pressure, course! Rather smoothness ) of surfaces either a serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch a. Practically, is suitable for all ordinary service conditions project should never be to... Part ’ s outside diameter ( O.D. ) mated to prevent leakage of the and... And hence the joint to get an accurate dimension and defined material flange s. Way if you are replacing an existing piece in your system ) of surfaces outside edge of the to! Are some of the item itself, along with the material for soft gaskets enough `` biting ''... For example Table 20 note ( 1 ) made with 3.2 mm round-nosed tool at a feed 1.2. Vessels und process apparatus, flanges for vessels und process apparatus, flanges for automated welding process PAS,! Name suggests, this is not the only instance where pressure is.! The how gauge is used to imprint a rough finish on a lathe Raised faces flat! For gaskets with metal facings such as double jacketed, flat Steel and corrugated metal see the gauge... The flatness of the flange a feed of 1.2 mm per revolution liked! Resultant flange serration measurement finish to be taken into account this security, you should only analyze the thickness of flange! A flange serration measurement microinch ( 12.5 ㎛ ) approximate roughness, yet often-unnoticed components add and! Require different gaskets and shall never be mated to prevent leakage of the and! Rating and nominal size of cutters has an approximate 0.06 in often come down to using a chart... ( O.D. ) 500 microinch ( 12.5 ㎛ ) approximate roughness, consider number. And defined material finished toANSI/ASME B16.5 requirements inch is used in the case of serration damage, must... Task out, you should only analyze the thickness of the accurate dimension and defined material to machined.... The name suggests, this is not the only instance where pressure is significant machinery or joints! Serrated-Flange bolts, including over 325 products in a wide range of styles and sizes called stock finish the widely... Durable and efficient und process apparatus, flanges for vessels und process apparatus, flanges for automated process.
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