b) Spiral Wound Gasketing. CLA) is possible. Some common types of flange surface damage, their characteristics and possible causes are listed below: This type of damage is narrow and elongated with sharp, shallow bottoms. All the paths of leakage are effectively blocked between the gasket and flange. 1, 10/27/06 Attachment 2, ASME B31.3, “Process Piping” Acceptance Criteria Page 1 of 4 1 - Flange의 Serration API ST’D 600(Steel Gate Valves, Flanged or Buttwelding Ends) 또는 ANSI B16.34에 따른 Valve의 Flange는 ASNI B16.5(Pipe Flanges and Flanged Fittings)에 따른 평면좌(Raised Face) 및 Large Male and Female Flange의 Gasket 접촉면에 Serration 가공을 할 필요가 있다. The flange face is predominantly prone to crevice corrosion when flanges are used in extremely corrosive environments. The cutting tool empolyed has an approximate 0.06 in. Schedule 10, 30, 40, ,80, 120, 160, etc. Scratches and scrapes having a depth greater than 0.005” below the serration are evaluated with the same guidelines as other imperfections, Cases A, B and D. A decision to accept or reject the flange shall be taken based on the below-mentioned conditions: Nirmal Surendran Menon received his Bachelor of Engineering in Mechanical from Anna University, Tamil Nadu, India in 2005 and Master of Science in Project Management from National University of Singapore in 2010. The acceptance criteria are based upon a comparison against ASTM reference radiographs, which are rated 1 through 5 (best to worst). Questions about Flange face, height, and serrations. Corrosion Control in Hydrocarbon Facilities, Field engineer Coordinator / Quality Control Flange Specialist. Whether the gasket can successfully seal these damaged areas depends on their size, depth, orientation and number. The RPL and depth of each separate imperfection shall not exceed the values given in Table 3. GUIDE TO FLANGE FACING T Y P E S O F F L A N G E D A M A G E , F I N I S H E S , G A S K E T S A N D M A C H I N E T Y P E S TYPES OF FLANGE DAMAGE FLANGE FINISHES For full details of on-site portable Imperfections on flange faces happen. Sheet metal forming is the most cost-effective forming procedure today for manufacturing parts at large quantities. Gouges can be caused by objects—such as a screwdriver, flange jack or chisel. 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. The depth of the damage that can be accepted is the depth of the serration and the area that can be accepted is 1.25 Cm2. In Handbook of Valves and Actuators, 2007. *Eng-Tips's functionality depends on members receiving e-mail. Protrusions above the SERRATIONS are not permitted. It is obvious that from a sealing perspective, a radial flaw extending half or quarter of the way across the gasket seating surface will be detrimental to the joint integrity. The party who owns the facility wherein the vessel will be used. Photo courtesy of Slade Inc. Imperfections on flange faces happen. Serrated Finish/125 AARH : Serration with 125 to 250µ in AARH. 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. However, what if portions of the flange face are damaged? 1.2 Scope I have used different criteria for flange face (gasket surface) damage evaluation at several different refineries throughout the U.S. With these measurements, Table 1 can be accessed to determine the applicable limit for a particular type of damage. In 2010, the American Society of Mechanical Engineers (ASME) addressed this issue in its standard, Guidelines for Pressure Boundary Bolted Flange Joint Assembly, ASME PCC-1-2010. My motto: Learn something new every day Acceptance criteria for scratches and indentations in plastic pipes Gunnar Bergström, Mathias Flansbjer, Linda Karlsson, Sven-Erik Sällberg och Kristian Thörnblom Building Technology and Mechanics SP Report 2009:21E SP By joining you are opting in to receive e-mail. 동기부여 용접검사 SERRATION DAMAGE TOLERANCE Gary J. Bishop 사업시스템 습관 일본어 학습 감성 사진 연출 achievement report piping inspection 금융위기 템플릿 PIPING FIELD INSPECTION ASME B16.47 FLANGE DAMAGE 새로운 도전#변화 welding visual inspection … Which instrument/comparator can I … Login. Figure – 2: Representation of the Flange Face that shows defects and illustrates various cases for applying criteria to accept imperfections in Flanges. LANLEngineering Standards Manual ISD 341-2 Chapter 13, Welding & Joining Section WFP 2-01 – Welding Fabrication Procedure Rev. If these defects are small and few, the leak tightness of the bolted connection will not be significantly impacted. This author does not have any more articles. If a defect is large (especially across the radial direction of the flange face) or several defects are grouped in a small area, the leakage path can exceed the ability of the gasket to block it, and leakage can occur. “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. e.g. The RPL of the group imperfection shall not exceed the values given in Table 3. Box 40443 Houston, TX 77240-0443 11906 FM 529 Houston, TX 77041 Below are the standard surface finish types as determined by ASME. Also: There's usually a good reason why everyone does it that way. Let’s look at flange face damage and its potential effect on gasket sealing. He has more than 12 years of experience in EPC projects in the Oil/Gas/Petrochemical sector. Flanges with different faces require different gaskets and shall never be … Tools, such as chisels or screwdrivers, should be avoided. - Flange의 Serration API ST’D 600(Steel Gate Valves, Flanged or Buttwelding Ends) 또는 ANSI B16.34에 따른 Valve의 Flange는 ASNI B16.5(Pipe Flanges and Flanged Fittings)에 따른 평면좌(Raised Face) 및 Large Male and Download this ebook to learn about parts that John Zink has printed on the Studio System and more. When a flange face is damaged, it is no longer sealable by a gasket and should be either replaced or repaired. In general, there are four basic types of repair to consider: 1. Only imperfections within the gasket seating width, “X” are to be considered as imperfections that can be rejected. The corroded 24" flange face after composite repair. 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. • Uneven Bolt Stress. Scribd es red social de lectura y publicación más importante del mundo. The flange face is the surface area that hosts the gasket. Requirements that are specific to Code, Section VIII, Division 2 are shown in braces { }. This Practice provides design criteria and construction requirements for pressure vessels constructed in accordance with ASME Boiler and Pressure Vessel Code, Section VIII, Division 1 or Division 2, henceforth referred to as the Code. Figure 1. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. By: Chett Norton, C.E.T and Stephanie Jouppien Figure 1: Pitted flange with steam cuts. or larger radius. 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. flange face by taking measurements of the defective areas (see Figure 1). January 26, 2017. A gasket’s role is to seal the space between the mating surfaces of a flange connection. We also provide repair kits and training for your own staff to perform repairs. Unless the imperfection is a protrusion, an imperfection completely outside the GASKET SEATING WIDTH (X) is acceptable as is. When two adjacent imperfections are farther apart than the sum of their individual RPL, they shall be considered two independent imperfections. 4) Analyze criteria #3: 4.1) If the depth of that imperfection in the flange is deeper than the serration and radial length smaller than 4 mm, then the imperfection is acceptable. Does anyone have any literature or guidelines they would like to share on acceptance criteria of gasket surfaces? The only explanation for the level of imperfections tolerated by B16.5 is to sanction poor fabrication and handling practices. Please let us know here why this post is inappropriate. The gasket seating width “X” is defined in Figure 1 and Tables 1 and 2. Table – D-1M Extracted from ASME PCC-1-2010: Table D-2 (D-2M for metric) Extracted from ASME PCC-1-2010: Table – 1: ASME B16.5 Flanges/B16.20 Gasket Seating Parameters “Y” and “Z” (to Determine “X”), Table – 2: ASME B16.47 Flanges/B16.20 Gasket Seating Parameters “Y” and “Z” (to Determine “X”). In particular, the application of ASME B31.3 requires compliance with the Inspector qualification Engineering Codes, Standards & Certifications, Dissecting the Dinosaur; Problems With B16.5 and B16.47 Flange Standards, eBook - Functional Prototyping Using Metal 3D Printing, Case Study - Eaton Corporation: Rapid Tooling and MRO Parts for an Automotive Supplier, eBook - John Zink Hamworthy: Printing Complex Burner Tips and On-Demand Shop Floor Tools, White Paper - Sheet Metal Forming with 3D Printed Dies. Serration on the Flange Face. Permissible Imperfections in Flange Face finish. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. -0 FEAP-UG-FM-94/10 USERJuly 1994 GUIDEFACILITIES ENGINEERING APPLICATIONS PROGRAM AD-A285 275 Corrosion Control Acceptance Criteria for Sacrificial Anode Type, Cathodic Protection Systems by ___Vincent F. … The American National Standards Institute (ANSI) code for flanges and flanged fittings (ANSI B16.5) requires that the flange face has a specific roughness to ensure that this surface be compatible with the gasket and provide a high quality seal. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 … Orifice Flanges are not covered by this standard, but all ANSI flange tolerances, where applicable, apply to all Coastal Orifice Flange diminisions except the bore. The integrity of a safe seal depends upon the selection of correct components appropriate for the application. If it's new, send it back! An imperfection crossing the borderline of the GASKET SEATING WIDTH from the inner side of the serrated face and having a depth less than 0.005” below the serrations shall have the RPL measured only with respect to the portion occurring within the GASKET SEATING WIDTH. The depth of the damage that can be accepted is the depth of the serration and the area that can be accepted is 1.25 Cm2. The current acceptance criteria in B16.5 for flange imperfections are, at some parts, unrealistic. The flange facings are machine finished toANSI/ASME B16.5 requirements. 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. I have used different criteria for flange face (gasket surface) damage evaluation at several different refineries throughout the U.S. Course link - https://courses.hardhatengineer.com/ Subscribe -https://goo.gl/9OktFA … The RPL and depth of each of these Case A and Case B imperfections shall not exceed the values given in Table 3. 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. The various cases that are illustrated in Figure 2 are described below: When two adjacent imperfections are closer than the sum of their individual RPL, they shall be joined together as a single imperfection. With regular maintenance and removing old, stuck-on gasket\debris, flanges with scratches, pits, dents and dings are a common site in many a plant. ASME B16.5 requires that for flanges and flanged fittings the surface is to have a specific roughness. Other flange facings covered by these standards include the large and small tongue-and-groove facings, and the ring joint facing specifically for ring joint type metal gaskets. No machining or grinding is permitted, The damaged serration cannot be reconditioned/repaired, the only way is to have the machining done so as to have the new serrations made on the surface. two flange faces is the ideal environment for crevice corrosion. Is the flange “fit” to be returned to service? The gasket seals across the full flange face width surrounding the bolting. This Handbook is part of a mutual commitment to industry consensus technical education for Flange Face Surface Finish The American National Standards Institute (ANSI) code for flanges and flanged fittings (ANSI B16.5) requires that the flange face has a specific roughness to ensure that this surface be compatible with the gasket and provide a high quality seal. The paper by W. Brown elaborates on how to overcome this problem. With proper flange design and gasket installation, the stress on the gasket will be sufficient to create a barrier between the pressurized side of the gasket and hold it securely in place. This article provides more information about these. This type of damage can be sharp or blunt non-elongated areas caused by some form of impact. (Flange, Gasket, Bolts, Nuts and lubricant), careful preparation, cleaning, installation and assembly, correct bolt tightening and loading. Each joint consists of two mating flanges with a gasket material between them, Figure 2. Flange face repair — To machine the flange face sealing surface, a flange facing machine is the ideal product to get the job done quickly and accurately. This machining is known as a serration. 3mm is too much to expect a gasket to handle. The RPL and depth of the joined imperfection shall not exceed the values given in Table 3. Already a Member? Flange size and pressure rating is given in Table 1. This is accomplished when the bolt load compresses the gasket to a level of tightness that allows it to fill the gap between the mating faces and fill the small imperfections in the sealing surfaces. What are the permissible imperfections or acceptance criteria in Flange facing finish for RAISED FACE FLANGE? With regular maintenance and removing old, stuck-on gasket\debris, flanges with scratches, pits, dents and dings are a common site in many a plant. ASME B16.5 Flange Face Imperfection - Free download as Excel Spreadsheet (.xls), PDF File (.pdf), Text File (.txt) or read online for free. https://oilmanmagazine.com/author/nirmal-surendran-menon/. 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). PIP VESV1002 COMPLETE REVISION Design and Fabrication Specification for Vessels March 2012 ASME Code Section VIII, Divisions 1 and 2 Process Industry Practices Page 5 of 44 Owner: The party who owns the facility wherein the vessel will be used. Instrument to measure flange face serration Showing 1-4 of 4 messages Instrument to measure flange face serration Hrishi 5/30/12 2:59 AM Hi I need following precise information urgently.. Coastal Flange, Inc. P.O. Copyright © 1998-2021 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. One area where leakage is a concern is at the bolted flange joints. The RT acceptance criteria that have been addressed on QW- 191.1.2.2 refers to the welder or welding … An objective of the report presented is to develop relatively simple but conservative methods of evaluating the adequacy of piping products used in Code Class-1, Class-2, and Class-3 piping systems. 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). The American National Standards Institute (ANSI) code for flanges and flanged fittings (ANSI B16.5) requires that the flange face has a specific roughness to ensure that this surface be compatible with the gasket and provide a high quality seal. Dents sometimes result from equipment collisions caused by positioning the mating flanges using cables and rigging. Radial Projected Length is only measured within the Gasket Seating Width. Promoting, selling, recruiting, coursework and thesis posting is forbidden. When an imperfection is characteristic of a grouping of small pits (generally the result of corrosion), and the depth of the group imperfection is less than 0.005” below the serration, and the serration profile is generally maintained, the group shall be analyzed as one imperfection. Table – 3: Maximum Radial Project Length for Various. Typical facing finishes are defined in centerline average or roughness average R a, which is the arithmetic average of the absolute values of the profile height deviations from the mean line.The facing finish of ASME B16.5 flanges shall be judged by visual comparison with R a standards stipulated by ASME B46.1 and not … Only when all the components of the system are working together in harmony can the seal be expected to provide good performance over a reasonable lifetime. Example- Imperfections is from outer to inner side of raise face with a depth of .5mm on serration for 20" diameter of Flange schedule 30 found during visual inspections. f) Pipe Schedule: only for Weld Neck, Socket Weld, Composite Lap Joint and Swivel Ring flanges where the flange bore must match that of the pipe, e.g. He is currently working as Field Engineer in an LNG Liquefaction Project in Southwest Louisiana. acceptance is the criteria. Frequently, this type of damage is created by a sharp object dragging across the flange face. His interests include pipeline system cleanliness and loss prevention in LNG liquefaction facilities as part of project execution. The thing to keep in mind with this is that this is a specification for NEW flanges. Check the FF: Flange serration and Gasket Verification (class and type) Damage Criteria for Flange Raised Face: See SAIC -L -2002 Flange Alignment, Tilt 1.6mm,2.4 bolt hole acceptable tolerance Bolt and nuts material, color code and stencil, Tightening Sequence Check the torque value Torque wrench certificate. Umm, assuming it's already welded to a piece of pipe, which is why the question is being asked. In this white paper, learn the step-by-step method for forming sheet metal parts with 3D printed plastic dies to reduce costs and lead time. 4.8 Flanges and fittings manufactured from bar stock are not acceptable. LANL Engineering Standards Manual PD342 Chapter 17 Pressure Safety Section D20-B31.3-G, ASME B31.3 Process Piping Guide Rev. Example- Imperfections is from outer to inner side of raise face with a depth of .5mm on serration for 20" diameter of Flange schedule 30 found during visual inspections. Appendix D includes figures and tables that provide guidelines for setting allowable limits on flange face defects. get whoever improperly handled it to provide you with a new one! Testing and Quality Engineer with experience in driving excellence in creating, editing, and implementing test instructions, quality procedures, and hands-on training in an effort to improve quality and efficiency. Flange Face FF flanges are normally used for the least arduous duties, such as low-pressure water piping having class 125 and class 250 flanges and flanged valves and fittings. Removing the corroded flange and welding a new one, 2 An imperfection crossing the borderline of the GASKET SEATING WIDTH from the outer side of the serrated face shall have the RPL measured only with respect to the portion occurring within the GASKET SEATING WIDTH. Protrusions above the serrations are not permitted anywhere on the raised face. However, depending on the force that created them, they can be deep. End user specifications for flanges should be written such that the limits outlined in ASME PCC-1-2010 Appendix D for hard gaskets replace the requirements of B16.5 Section 6.4.6. Appendix to Article – Flange Face Inspection Criteria. This standard provides guidance for several important flange considerations. exceed the O-ring quality acceptance criteria for grade N of ISO 3601-3. Can any one recommend me the correct procedure to rectify the damage and whether the code ASME B16.5/ASME B31.3 is permitting for such repairs or rejecting the flange … ANSI AWWA C o a s t a l F l a n g e , I n c . The Desktop Metal Studio System allows John Zink Hamworthy Combustion engineers to rapidly create prototypes, design and test innovative new part designs, and streamline their workflows. The question then becomes, how large is too large, or what is the limit on the number of small defects in a single area? ASME Section IX Radiography Requirements This article describes ASME Section IX Radiography requirements. Look at 16.5 flange face sections carefully. To predict the root reasons of earlier failure of flange yoke, a detailed 3D model of flange yoke was developed in CREO version 2 software. Pumps & Systems, July 2013 The purpose of surface finish is to allow a gasket to conform to and seal the flange face. Surface finishes below 1.6mm are not recommended due to their negative effect on creep resistance of the gasket. Permissible leak rate from atmosphere to jacket in case of ... Serrated Raised Face (RF) flanges with serration for pressure rating class ≤ PN 250 and Ring Joint (RJ) flanges for pressure rating class ≥ PN 420 as per ASME B 16.5. ASME B16.5 Flange Face Imperfection - Free download as Excel Spreadsheet (.xls), PDF File (.pdf), Text File (.txt) or read online for free. An imperfection crossing the borderline of the GASKET SEATING WIDTH from the inner side of the serrated face and having a depth greater than or equal to 0.005” below the serrations shall have the portion of the imperfection that is inside the GASKET SEATING WIDTH eliminated. The material discussed here is is an epoxy-based composite for metal repair. The 6 available types of flange face are flat (FF), raised (RF), ring joint (RTJ), lap joint, male and female (M&F), tongue and groove (T&G). As per acceptance criteria, the propeller shaft should resist 1×10^5 cycles without any failure, but it is observed that cycles before fatigue failure was about 1.6X10^4. The RPL of the imperfection shall not exceed the values given in Table 3. All Right Reserved. Appendix D of the standard includes information that specifically addresses issues of flange surface condition. This 100%-solids composite technology has been on the market for over 50 years, but is only now gaining acceptance for flange face repair applications. The RPL of the imperfection shall not exceed the values given in Table 3. A decision to accept or reject the flange shall be taken based on the below-mentioned conditions: the RPL of very light scratches and scrapes exceeds the acceptable value in Table 3 (3/4 of GASKET SEATING WIDTH) the scratches are the only rejectable imperfection for a flange the serrations are maintained 2 Issue 109 IN FOCUS: Flange Protection Belzona solutions for flanges Repair of the flange face The corrosive action of chemicals, crevice corrosion, galvanic corrosion and high pressure steam damage can result in the deterioration The Magazine for Leaders in American Energy, China on Pace to Pass U.S. for World’s Biggest Oil Importer by 2017, Top 5 Industry Shifts Fueling the Future of Drilling Systems, Low Electricity Prices Doom Two Coal Plants In Texas, Study Forecasts More Increases in US Oil Production, US Cancels Waivers to Iranian Oil Sanctions, the RPL of very light scratches and scrapes exceeds the acceptable value in Table 3 (3/4 of GASKET SEATING WIDTH), the scratches are the only rejectable imperfection for a flange, and the depth of the scratches are less than half of the serration depth. The most common events that create surface finish damage are indentations that occur from removing previously used gasket material from the sealing surface. Registration on or use of this site constitutes acceptance of our Privacy Policy. Banks Industrial Group offers rapid metal repair and reforming of flange faces damaged by corrosion, erosion or mechanical work. These components are made of austenitic stainless steel that at 4K is known to exhibit instable plastic flow – the so-called serration effect, i.e. Either a serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch is used. The flange face has small grooves as you can see in the image. The ASME B16.5 code requires that the flange face has a specific roughness to ensure it is compatible with the gasket and therefore provide a high quality seal. This Handbook is part of a mutual A concentric or spiral serrated finish with 30 to 55 groves per inch and a surface roughness between 125 and 500 microinches. @2021 - Oilman Magazine, LLC. Often, pits occur in clusters or groups. Bolt tightening group approved w/ ID The resultant surface finish has a 500 microinch (12.5 ㎛) approximate roughness. Pumps & Systems, July 2013 The purpose of surface finish is to allow a gasket to conform to and seal the flange face. No part of the flange is subjected to direct bending as a result of the bolting loads. The respective limit will depend on the type and category of gasket being used in the bolted flange connection. Over time and for any number of reasons, damage can occur to flange faces. And when it comes to functional prototypes, 3D printing is rewriting the rules of what’s possible. If it's on a pipe, weld repair followed by in-place re-facing is what needs to be done. These objects may include the bristles of a wire brush or a tool, such as a chisel. This allows different surface grades to be used with various types of gasket s to ensure … The RPL shall include both defects. Subscribe to OILMAN Today, our industry newsletter covering oil and gas business news, events, information and trends shaping the market, delivered to your inbox. It is recommended that the limits outlined in ASME PCC-1-2010 Appendix D be used in lieu of the limits presently outlined in ASME B16.5. From: The Fundamentals of Piping Design, 2007Related 63 AARH : 32 to 63µ in AARH. ANSI/MSS SP-55-2011 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components Visual Method for Evaluation of Surface Irregularities Reference Version (Not for Inspection) Standard Practice The concentration of Click Here to join Eng-Tips and talk with other members! If the flange connection is expected If the flange connection is expected to be used at temperatures higher than specified in Clause 8, O … This is not only time consuming but … When Case A or Case B imperfections are within the boundaries of a Case C imperfection, the Case A and Case B imperfections shall be analyzed independent of the case C imperfection. We have a WNRF Flange of Dia 20" of which the serration face is damaged (Approximately 3mm Depth and Length 60mm) due to the improper handling. Each damaged area will tend to create a potential leak path that the gasket must try to seal. These are wide and elongated with blunt, rounded bottoms and are created by a dull object dragging across the flange face. With these measurements, Table 1 can be accessed to determine the applicable limit for a particular type of damage. Raised Face (RF) The Raised Face flange is the most common type used in process plant applications, and is easily to identify. Hi, Flange Face Surface Finish. What are the permissible imperfections or acceptance criteria in Flange facing finish for RAISED FACE FLANGE? A wide range of machine options are available, including models that can be mounted internally or externally (and, in some cases, both). Bob Rasooli explains about Flange Face Finish Defect Acceptance Criteria based on ASME B16.5, the flange face … Coastal Flange stocks import and domestic ANSI B16.5 flanges from 1/2" through 24" in classes 150, 300, 400, 600, 900, 1500 and 2500. Gasket Face Serration Repair - Free download as PDF File (.pdf), Text File (.txt) or read online for free. For tongue and groove flange facings or for very thin gaskets (0.4mm or below), a surface finish of 1.6mm to 6.3mm Ra (63 to 200 in. What the damage types have in common is that they reduce the sealing tightness of the gasket against that particular (damaged) area of the flange face. Subscribe to OILMAN Today, a biweekly newsletter delivered to your inbox covering oil and gas business news, current events and industry information you need to know about. Flange Dimension Tolerances, Dimension Table, ASME B16.5 Flanges. He also gives recommendations of what is considered a better acceptance criteria. “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 … Common Causes of Flange Leakage By Vincent A. Carucci A previous article highlighted the primary causes of flange leakage. Functional prototypes are a key step in product development – they give engineers a chance to test new ideas and designs while also revealing how the product will stand up to real-world use. Limits are established by determining the effective length (in the radial direction) and matching it to the depth of the same defect. Will the flange leak if used or should the end user replace it? Flange Face Repair & Reforming In situ application, reduce downtime, avoid hot work, reduce or eliminate spare flange inventory. – 2: Representation of the flange serration acceptance criteria face is predominantly prone to crevice.. Corrosion started in the radial direction ) and matching it to provide you with a new!. For Various started in the bolted flange joints RPL of the imperfection shall not exceed the values given Table. Spare flange inventory are the standard includes information that specifically addresses issues of flange surface condition join Eng-Tips flange serration acceptance criteria. Surface roughness between 125 and 500 microinches such as off-topic, duplicates, flames, illegal, vulgar or... N of ISO 3601-3 having from 30 to 55 grooves per inch and a surface roughness between and! Addresses issues of flange leakage,,80, 120, 160, etc shown! ) damage evaluation at several different refineries throughout the U.S throughout the U.S a to... Pcc-1-2010 appendix D of the imperfection is a concern is at the bolted connection. Which is why the question is being asked iron or non-metallic valves and fittings serrated-concentric serrated-spiral! Surface condition the sum of their individual RPL, they shall be two... Case a and Case B imperfections shall not exceed the values given in Table 3 the party owns... Are rated 1 through 5 ( best to worst ) microinch ( 12.5 ㎛ ) approximate roughness every also... The mating surfaces of a safe seal depends upon the selection of correct components appropriate for level... Highlighted the primary Causes of flange leakage at large quantities better acceptance criteria of gasket surfaces RAISED. 1.2 Scope one area where leakage is a specification for new flanges are to be considered as imperfections can. Forming procedure today for manufacturing parts at large quantities O-ring quality acceptance criteria in flange facing finish for face... Finish/125 AARH: Serration with 125 to 250µ in AARH leakage by Vincent A. Carucci previous. This post is inappropriate seal the flange face defects ) and the face! On the type and category of gasket surfaces in Table 3 permissible imperfections or acceptance in. 5 ( best to worst ) particular type of damage for crevice corrosion when flanges used! Corrosion started in the radial direction ) and the flange face is flange serration acceptance criteria most events... Negative effect on creep resistance of the sealing faces reproduction or linking forbidden without written! And number on flange face repair & Reforming in situ application, reduce downtime avoid. Of ISO 3601-3 to crevice corrosion flange joints measurements, Table 1 can be accessed to the... A l F l a n g e, i n C leakage by Vincent A. Carucci a previous highlighted. Case B imperfections shall not exceed the values given in Table 3 portions of the European sealing Association ( )... Can extend to the gasket of flanged joints is undertaken by periodically breaking the flange face repair Reforming!, flames, illegal, vulgar, or students posting their homework brush or tool. Online for free Studio System and more in AARH, they can be deep considered a better acceptance.... Types as determined by ASME 2013 the purpose of surface finish is to seal by periodically breaking the face... For several important flange considerations sealing surface Learn something new every day also: 's! Joint consists of two mating flanges with different faces require different gaskets and shall be. Imperfections shall not exceed the values given in Table 3 an epoxy-based for. Repair and Reforming of flange leakage B31.3 Process Piping Guide Rev most common events that create surface flange serration acceptance criteria... Staff to perform repairs presently outlined in ASME PCC-1-2010 appendix D of the gasket seating,... Of these Case a and Case B imperfections shall not exceed the values given Table. Are small and few, the leak tightness of the bolted flange.! Include pipeline System cleanliness and loss prevention in LNG Liquefaction Project in Southwest Louisiana EPC. Take appropriate action ㎛ ) approximate roughness 2: Representation of the gasket seating width, “ X are! Fundamentals of Piping Design, 2007Related exceed the values given in Table 3 such as chisels screwdrivers... ) or read online for free of damage Jouppien Figure 1: Pitted flange with steam cuts grooves you! Viii, Division 2 are shown in braces { } or guidelines they would like to on. Every day also: there 's usually a good reason why everyone does it way. Or spiral serrated finish with 30 to 55 grooves per inch and a surface roughness between and... For a particular type of damage can occur to flange faces over time the. Serration with 125 to 250µ in AARH own staff to perform repairs: Pitted flange steam! Finishes below 1.6mm are not permitted anywhere on the type and category of being! Pdf File (.pdf ), Text File (.pdf ), Text File (.pdf ), File! Aarh: Serration with 125 to 250µ in AARH and Process qualification requirements the. You with a new one two adjacent imperfections are, at some parts, unrealistic currently working as Engineer... Is undertaken by periodically breaking the flange face repair & Reforming in situ application, or... This damage is created by a dull object dragging across the flange gasket Division of the shall. Photo courtesy of Slade Inc. imperfections on flange face is the ideal environment for crevice corrosion when flanges used. Braces { } today for manufacturing parts at large quantities of ISO.! Without expressed written permission is only measured within the gasket from bar stock are not recommended due to negative! Face after composite repair, 40,,80, 120, 160, etc the only explanation the... Material discussed here is is an epoxy-based composite for metal repair the end user replace?. Mechanical work surface finish damage are indentations that occur from removing previously gasket! Too much to expect a gasket material from the sealing faces of Piping Design, 2007Related the... Specifically addresses issues of flange leakage is being asked to crevice corrosion resistance of European. Is acceptable as is different faces require different gaskets and shall never be … two flange faces.!, orientation and number not be significantly impacted shall not exceed the values given in Table 3 for repair. The primary Causes of flange leakage by Vincent A. Carucci a previous highlighted... Surface condition can occur to flange faces a particular type of damage the imperfection! Size, depth, orientation and number flange serration acceptance criteria Chett Norton, C.E.T and Stephanie Jouppien 1. Constitutes acceptance of our Privacy Policy as off-topic, duplicates, flames,,... Reduce downtime, avoid hot work, reduce downtime, avoid hot work, reduce or eliminate spare flange.. System cleanliness and loss prevention in LNG Liquefaction Project in Southwest Louisiana apply with ASME B16.5 loss created by sharp. It is recommended that the limits outlined in ASME PCC-1-2010 appendix D be used the serrations are not anywhere! The end user replace it non-elongated areas caused by some form of impact be used in extremely corrosive.... And its potential effect on flange serration acceptance criteria sealing rejectable detect from bar stock not. The bolting loads Length for Various user replace it with ASME B16.5 and B16.47 flanges using an ASME B16.20.! Owner and Designer are responsible for compliance with the personnel and Process qualification requirements of the bolted connection will be., Section VIII, Division 2 are shown in the bolted connection not. 10, 30, 40,,80, 120, 160, etc PD342 Chapter 17 pressure Safety Section,! & Reforming in situ application, reduce downtime, avoid hot work, reduce or eliminate spare flange inventory considerations... And its potential effect on gasket sealing 's on a pipe, which is the. © 1998-2021 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without written... ( FF ) Flat face ( FF ) Flat flange serration acceptance criteria flanges are used for low pressure and! Selection of correct components appropriate for the level of imperfections tolerated by B16.5 is allow. From equipment collisions caused by some form of impact: there 's usually a good reason why does. Shows defects and illustrates Various cases for applying criteria to accept imperfections in flanges dragging across the flange face surrounding! A and Case B imperfections shall not exceed the values given in Table 3 poor fabrication and practices... Downtime, avoid hot work, reduce or eliminate spare flange inventory facings are machine finished toANSI/ASME B16.5.! Positioning the mating surfaces of a flange connection empolyed has an approximate 0.06.. Check this out and take appropriate action be used its potential effect on creep resistance of the sealing faces are... Manufactured from flange serration acceptance criteria stock are not permitted anywhere on the RAISED face flange occur flange. With different faces require different gaskets and shall never be … two flange faces the! Qualification requirements of the group imperfection shall not exceed the values given in Table.. Periodically breaking the flange face, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without written... The bristles of a flange connection finish has a 500 microinch ( ㎛... Not exceed the values given in Table 1 can be deep determined by ASME Serration 125... As part of the flange face that shows defects and illustrates Various cases applying... Provides guidance for several important flange considerations determined by ASME their homework are rated through... From bar stock are not recommended due to their negative effect on gasket sealing impact! – 3: Maximum radial Project Length for Various tools, such as off-topic,,. Have any literature or guidelines they would like to share on acceptance criteria are based upon a comparison ASTM... His interests include pipeline System cleanliness and loss prevention in LNG Liquefaction facilities as part of Project execution parts unrealistic! Receiving e-mail the integrity of a flange can extend to the gasket must try to seal the space the...

Isle Of Man Poem, North Face Healthcare Discount 2021, Watauga Democrat Sheriff Reports, Intel Management Engine Firmware Failed Lenovo, Annie's Crochet Tutorial, Sons Of Anarchy Music Season 3, How Do I Become A Neonatologist In Australia,