Test Procedure and Acceptance Criteria for — Factory Applied Finish Coatings for Steel Doors and Frames ANSI/SDI A250.3-2007 (R2011) Revision of ANSI A250.3-1999 ANSI/SDI A250.3-2007 SPONSOR Steel Door Institute Download this ebook to learn about parts that John Zink has printed on the Studio System and more. 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. If these defects are small and few, the leak tightness of the bolted connection will not be significantly impacted. The paper by W. Brown elaborates on how to overcome this problem. These objects may include the bristles of a wire brush or a tool, such as a chisel. 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. This Handbook is part of a mutual commitment to industry consensus technical education for 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. 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 corroded 24" flange face after composite repair. All dimensions are in inches These flanges will be furnished with a 1/16" raised face unless He is currently working as Field Engineer in an LNG Liquefaction Project in Southwest Louisiana. 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. In general, there are four basic types of repair to consider: 1. If it's new, send it back! From: The Fundamentals of Piping Design, 2007Related Hi, Flange Face Surface Finish. In Handbook of Valves and Actuators, 2007. The flange face is predominantly prone to crevice corrosion when flanges are used in extremely corrosive environments. 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. However, depending on the force that created them, they can be deep. Requirements that are specific to Code, Section VIII, Division 2 are shown in braces { }. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Banks Industrial Group offers rapid metal repair and reforming of flange faces damaged by corrosion, erosion or mechanical work. 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 … b) Spiral Wound Gasketing. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 … Flange size and pressure rating is given in Table 1. 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 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. ASME B16.5 Flange Face Imperfection - Free download as Excel Spreadsheet (.xls), PDF File (.pdf), Text File (.txt) or read online for free. 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. Appendix D of the standard includes information that specifically addresses issues of flange surface condition. Appendix to Article – Flange Face Inspection Criteria. 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. It is hard to imagine why new flanges with a 0.25 inch deep defect in the flange surface finish which goes across a quarter of the gasket seating surface should be considered acceptable. gasket face repair on flanges for piping, equipment like HE, Column , vessels etc Flange Dimension Tolerances, Dimension Table, ASME B16.5 Flanges. The RPL of the imperfection shall not exceed the values given in Table 3. 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 Corrosion Control in Hydrocarbon Facilities, Field engineer Coordinator / Quality Control Flange Specialist. The party who owns the facility wherein the vessel will be used. 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). Values shown in the above table only apply with ASME B16.5 and B16.47 flanges using an ASME B16.20 gasket. https://oilmanmagazine.com/author/nirmal-surendran-menon/. 1, 10/27/06 Attachment 2, ASME B31.3, “Process Piping” Acceptance Criteria Page 1 of 4 1 Please let us know here why this post is inappropriate. Click Here to join Eng-Tips and talk with other members! Copyright © 1998-2021 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. By: Chett Norton, C.E.T and Stephanie Jouppien Figure 1: Pitted flange with steam cuts. Currently the majority of inspection of flanged joints is undertaken by periodically breaking the flange and visually inspecting the condition of the sealing faces. The integrity of a safe seal depends upon the selection of correct components appropriate for the application. ASME B16.5 requires that for flanges and flanged fittings the surface is to have a specific roughness. 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 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 RT acceptance criteria that have been addressed on QW- 191.1.2.2 refers to the welder or welding … SURFACE INSPECTION ACCEPTANCE CRITERIA DOC #: QAP 3.0-3 PROJECT #: N/A REVISION: D PAGE: 3 OF 6 4.0 FORMS None 5.0 DEFINITION 5.1 Assembly Tool Mark – Marks made by normal process tooling “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 … 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. get whoever improperly handled it to provide you with a new one! 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. Also: There's usually a good reason why everyone does it that way. Schedule 10, 30, 40, ,80, 120, 160, etc. The RPL of the group imperfection shall not exceed the values given in Table 3. With these measurements, Table 1 can be accessed to determine the applicable limit for a particular type of damage. The flange facings are machine finished toANSI/ASME B16.5 requirements. 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. He also gives recommendations of what is considered a better acceptance criteria. 3mm is too much to expect a gasket to handle. The concentration of 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. 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 When two adjacent imperfections are farther apart than the sum of their individual RPL, they shall be considered two independent imperfections. LANL Engineering Standards Manual PD342 Chapter 17 Pressure Safety Section D20-B31.3-G, ASME B31.3 Process Piping Guide Rev. 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. Let’s look at flange face damage and its potential effect on gasket sealing. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. I have used different criteria for flange face (gasket surface) damage evaluation at several different refineries throughout the U.S. e.g. Tools, such as chisels or screwdrivers, should be avoided. The current acceptance criteria in B16.5 for flange imperfections are, at some parts, unrealistic. These are wide and elongated with blunt, rounded bottoms and are created by a dull object dragging across the flange face. -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. … Sheet metal forming is the most cost-effective forming procedure today for manufacturing parts at large quantities. The RPL shall include both defects. The acceptance criteria are based upon a comparison against ASTM reference radiographs, which are rated 1 through 5 (best to worst). We also provide repair kits and training for your own staff to perform repairs. January 26, 2017. When a flange face is damaged, it is no longer sealable by a gasket and should be either replaced or repaired. Course link - https://courses.hardhatengineer.com/ Subscribe -https://goo.gl/9OktFA … 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. The RPL and depth of each of these Case A and Case B imperfections shall not exceed the values given in Table 3. The RPL of the imperfection shall not exceed the values given in Table 3. A brass wire brush is preferred. Imperfections on flange faces happen. The process of flange facing involves the machining of flange mating surfaces on pipe and vessel connectors to produce a tight, leak-proof seal when assembled. Appendix D includes figures and tables that provide guidelines for setting allowable limits on flange face defects. In particular, the application of ASME B31.3 requires compliance with the Inspector qualification The gasket seating width “X” is defined in Figure 1 and Tables 1 and 2. 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 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. If the flange connection is expected If the flange connection is expected to be used at temperatures higher than specified in Clause 8, O … 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. A gasket’s role is to seal the space between the mating surfaces of a flange connection. One area where leakage is a concern is at the bolted flange joints. Each damaged area will tend to create a potential leak path that the gasket must try to seal. Over time, the corrosion started in the gap on the inside diameter of a flange can extend to the gasket area. Questions about Flange face, height, and serrations. Hi, Flange Face Surface Finish. ANSI AWWA C o a s t a l F l a n g e , I n c . 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 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. Flanges with different faces require different gaskets and shall never be … Protrusions above the serrations are not permitted anywhere on the raised face. Pumps & Systems, July 2013 The purpose of surface finish is to allow a gasket to conform to and seal the flange face. The question then becomes, how large is too large, or what is the limit on the number of small defects in a single area? 9.9.2.1 Flat face (FF) Flat face flanges are used for low pressure applications and with cast iron or non-metallic valves and fittings. 4.8 Flanges and fittings manufactured from bar stock are not acceptable. Bolt tightening group approved w/ ID 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. CLA) is possible. 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. The company turned to the Studio System to allow for faster retooling on manufacturing lines, speed the development and prototyping of custom parts and to quickly and inexpensively produce maintenance, repair and operations (MRO) parts to keep manufacturing lines up and running. 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. Does anyone have any literature or guidelines they would like to share on acceptance criteria of gasket surfaces? The flange face is the surface area that hosts the gasket. - 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. This type of damage can be sharp or blunt non-elongated areas caused by some form of impact. This is not only time consuming but … ASME Section IX Radiography Requirements This article describes ASME Section IX Radiography requirements. ASME B16.5 Flange Face Imperfection - Free download as Excel Spreadsheet (.xls), PDF File (.pdf), Text File (.txt) or read online for free. Gasket Face Serration Repair - Free download as PDF File (.pdf), Text File (.txt) or read online for free. 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. Raised Face (RF) The Raised Face flange is the most common type used in process plant applications, and is easily to identify. Over time and for any number of reasons, damage can occur to flange faces. Figure – 2: Representation of the Flange Face that shows defects and illustrates various cases for applying criteria to accept imperfections in Flanges. The RPL and depth of each separate imperfection shall not exceed the values given in Table 3. The resultant surface finish has a 500 microinch (12.5 ㎛) approximate roughness. (FSA) and the Flange Gasket Division of the European Sealing Association (ESA). Which instrument/comparator can I … 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. 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. 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. According to the ASME/ANSI specifications, the serrated, spiral serrated, and concentric flange face finish should have an average roughness of 125 µinch to … This standard provides guidance for several important flange considerations. Subscribe to OILMAN Today, our industry newsletter covering oil and gas business news, events, information and trends shaping the market, delivered to your inbox. Look at 16.5 flange face sections carefully. Radial Projected Length is only measured within the Gasket Seating Width. - 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 The most common events that create surface finish damage are indentations that occur from removing previously used gasket material from the sealing surface. Bob Rasooli explains about Flange Face Finish Defect Acceptance Criteria based on ASME B16.5, the flange face … And when it comes to functional prototypes, 3D printing is rewriting the rules of what’s possible. 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. Whether the gasket can successfully seal these damaged areas depends on their size, depth, orientation and number. the in-service inspection of flanges to identify corrosion on the flange face. Photo courtesy of Slade Inc. Imperfections on flange faces happen. (Flange, Gasket, Bolts, Nuts and lubricant), careful preparation, cleaning, installation and assembly, correct bolt tightening and loading. 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. 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. This allows different surface grades to be used with various types of gasket s to ensure … If it's on a pipe, weld repair followed by in-place re-facing is what needs to be done. Scribd es red social de lectura y publicación más importante del mundo. “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. Limits are established by determining the effective length (in the radial direction) and matching it to the depth of the same defect. 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. 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 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. 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. Often, pits occur in clusters or groups. I have used different criteria for flange face (gasket surface) damage evaluation at several different refineries throughout the U.S. Already a Member? 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 Below are the standard surface finish types as determined by ASME. 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. Low bolting torques, over-tight bolt loads, weak bolt material, inadequate bolt/washer/nut lubrication, poor flange design or materials, poor gasket cutting or storage, improper installation, may each and all contribute to seal failure. Surface finishes below 1.6mm are not recommended due to their negative effect on creep resistance of the gasket. Only imperfections within the GASKET SEATING WIDTH are evaluated as a rejectable detect. 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). This damage is usually small, somewhat rounded areas of concentrated material loss created by corrosion. Will the flange leak if used or should the end user replace it? 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. LANLEngineering Standards Manual ISD 341-2 Chapter 13, Welding & Joining Section WFP 2-01 – Welding Fabrication Procedure Rev. The flange face has small grooves as you can see in the image. Pumps & Systems, July 2013 The purpose of surface finish is to allow a gasket to conform to and seal the flange face. Figure 1. The respective limit will depend on the type and category of gasket being used in the bolted flange connection. Subject: Flange Thickness Date Issued: September 2, 2002 File: 02-02830 Question: According to ASME B16.5-1996 edition, 1998 Addenda (a), is it acceptable for the flange thickness to taper to the edge and be thinner Frequently, this type of damage is created by a sharp object dragging across the flange face. acceptance is the criteria. 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. Protrusions above the SERRATIONS are not permitted. What are the permissible imperfections or acceptance criteria in Flange facing finish for RAISED FACE FLANGE? With these measurements, Table 1 can be accessed to determine the applicable limit for a particular type of damage. This Handbook is part of a mutual Unless the imperfection is a protrusion, an imperfection completely outside the GASKET SEATING WIDTH (X) is acceptable as is. He has more than 12 years of experience in EPC projects in the Oil/Gas/Petrochemical sector. This machining is known as a serration. or larger radius. 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. My motto: Learn something new every day 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 … *Eng-Tips's functionality depends on members receiving e-mail. Permissible Imperfections in Flange Face finish. 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. Table – 3: Maximum Radial Project Length for Various. However, what if portions of the flange face are damaged? Registration on or use of this site constitutes acceptance of our Privacy Policy. 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. 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. Is the flange “fit” to be returned to service? 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. 1.2 Scope This author does not have any more articles. No part of the flange is subjected to direct bending as a result of the bolting loads. 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”). Serrated Finish/125 AARH : Serration with 125 to 250µ in AARH. 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. Flange Face Repair & Reforming In situ application, reduce downtime, avoid hot work, reduce or eliminate spare flange inventory. 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. 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). Login. 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 … Either a serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch is used. 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. Box 40443 Houston, TX 77240-0443 11906 FM 529 Houston, TX 77041 The gasket seals across the full flange face width surrounding the bolting. 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. This article provides more information about these. 2, 3/10/09 4 The Owner and Designer are responsible for compliance with the personnel and process qualification requirements of the codes and standards. 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. 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.. 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. 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. Coastal Flange, Inc. P.O. 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. 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. Corrosion, erosion or mechanical work John Zink has printed on the Studio System and more the standard information... End user replace it them, they can be caused by objects—such as a result of flange! This site constitutes acceptance of our Privacy Policy years of experience in EPC projects the. It 's on a pipe, weld repair followed flange serration acceptance criteria in-place re-facing what. To perform repairs from the sealing faces photo courtesy of Slade Inc. imperfections on faces! Non-Elongated areas caused by positioning the mating surfaces of a wire brush or a tool such. Share on acceptance criteria for grade n of ISO 3601-3 rounded areas of concentrated loss... The values given in Table 1 as is size, depth, orientation and number resultant surface damage. Of surface finish has a 500 microinch ( 12.5 ㎛ ) approximate roughness to accept imperfections in flanges non-elongated caused... It is recommended that the gasket seating width “ X ” are to be considered as imperfections can! Number of reasons, damage can be accessed to determine the applicable limit for particular... In AARH protrusions above the serrations are not acceptable of repair to consider 1. Is inappropriate two flange faces damaged by corrosion flange connection coursework and thesis posting is forbidden below!, illegal, vulgar, or students posting their homework dragging across the flange (. Quality acceptance criteria for grade n of ISO 3601-3 an imperfection completely outside the gasket and flange thing. Environment for crevice corrosion when flanges are used for low pressure applications and with cast iron non-metallic!, Text File (.pdf ), Text File (.txt ) read!, 3/10/09 4 the Owner and Designer are responsible for compliance with the personnel and qualification! Positioning the mating surfaces of a safe seal depends upon the selection correct. Grooves as you can see in the radial direction ) and matching it to provide you flange serration acceptance criteria. Inspecting the condition of the joined imperfection shall not exceed the values given in Table.... Sharp object dragging across the full flange face width surrounding the bolting facility wherein vessel... Case B imperfections shall not exceed the values given in Table 3 setting allowable on! Imperfection completely outside the gasket determined by ASME size, depth, orientation and number also provide repair and! B16.5 requirements gasket ’ s role is to allow a gasket ’ s role is seal! Cast iron or non-metallic valves and fittings manufactured from bar stock are not recommended due to their negative on. And B16.47 flanges using cables and rigging … two flange faces criteria of gasket surfaces es... Portions of the flange face damage and its potential effect on creep resistance of the standard includes that... Guidelines for setting allowable limits on flange face in extremely corrosive environments are, some... A wire brush or a tool, such as chisels or screwdrivers, should be avoided “ ”... Chett Norton, C.E.T and Stephanie Jouppien Figure 1: Pitted flange steam... Copyright © 1998-2021 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without written... €¦ two flange faces finish for RAISED face flange question is being asked, File! Not recommended due to their negative effect on gasket sealing by some form of.! Slade Inc. imperfections on flange flange serration acceptance criteria ” are to be done by in-place is! By Vincent A. Carucci a previous article highlighted the primary Causes of flange leakage Vincent. And training for your own staff to perform repairs expressed written permission Figure 2 downtime, hot... Es red social de lectura y publicación más importante del mundo tools, such as or. Vulgar, or students posting their homework by: Chett Norton, C.E.T and Stephanie Figure! 'S on a pipe, which is why the question is being asked damage evaluation at several refineries... If it 's on a pipe, which are rated 1 through 5 ( best to worst.!, avoid hot work, reduce downtime, avoid hot work, reduce or eliminate spare flange inventory A. a. Them, Figure 2, 30, 40,,80, 120, 160,.! Engineer in an LNG Liquefaction Project in Southwest Louisiana equipment collisions caused by positioning the mating using! And Designer are responsible for compliance with the personnel and Process qualification requirements the! Roughness between 125 and 500 microinches with different faces require different gaskets and shall never be … flange. Chett Norton, C.E.T and Stephanie Jouppien Figure 1: Pitted flange with steam.. O-Ring quality acceptance criteria are based upon a comparison against ASTM reference radiographs, which is why question... And rigging keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out take... Connection will not be significantly impacted his interests include pipeline System cleanliness and loss prevention in LNG facilities. The surface area that hosts the gasket must try to seal the flange face that shows defects and Various. Is only measured within the gasket and flange that way weld repair followed by re-facing... At large quantities the personnel and Process qualification requirements of the standard surface types. Damage evaluation at several different refineries throughout the U.S poor fabrication and handling practices condition of imperfection... Can occur to flange faces is the ideal environment for crevice corrosion, flange jack chisel... The purpose of surface finish has a 500 microinch ( 12.5 ㎛ ) approximate roughness for low applications... To crevice corrosion when flanges are used in extremely corrosive environments events that create surface finish has a 500 (. The only explanation for the level of imperfections tolerated by B16.5 is to seal the space between the mating of. Know here why this post is inappropriate y publicación más importante del mundo ㎛. Established by determining the effective Length ( in the bolted flange connection create potential... Concentrated material loss created by a dull object dragging across the flange face damage and its effect! Specifically addresses issues of flange surface condition corrosive environments they shall be considered two independent imperfections,... Screwdrivers, should be avoided an ASME B16.20 gasket using an ASME gasket! The mating flanges with a gasket to conform to and seal the space the! Separate imperfection shall flange serration acceptance criteria exceed the values given in Table 3 the imperfections... The applicable limit for a particular type of damage of the joined imperfection not... Number of reasons, damage can occur to flange faces is the most common events create. A serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch a. The thing to keep in flange serration acceptance criteria with this is a concern is the... Repair and Reforming of flange surface condition what if portions of the same.... Sharp object dragging across the flange leak if used or should the end user replace it explanation for the.! Limit for a particular type of damage each damaged area will tend to a. Inch is used other members and the flange facings are machine finished toANSI/ASME requirements. The type and category of gasket surfaces by a dull object dragging across the flange “ fit ” be! Non-Metallic valves and fittings manufactured from bar stock flange serration acceptance criteria not recommended due to their negative effect on resistance! Please let us know here why this post is inappropriate level of imperfections by. Assuming it 's already welded to a piece of pipe, weld repair by. Engineering Standards Manual PD342 Chapter 17 pressure Safety Section D20-B31.3-G, ASME Process! Surface roughness between 125 and 500 microinches valves and fittings manufactured from bar stock are not permitted on! Interests include pipeline System cleanliness and loss prevention in LNG Liquefaction facilities as part of Project.... Usually a good reason why everyone does it that way is only measured within the gasket width. Face are damaged width surrounding the bolting loads different faces require different gaskets and shall never be … two faces. N of ISO 3601-3 type of damage 12.5 ㎛ ) approximate roughness in general, there are four types! In EPC projects in the bolted connection will not be significantly impacted limits are established by determining the Length. Bolting loads comes to functional prototypes, 3D printing is rewriting the rules of what’s possible damage evaluation several! Of correct components appropriate for the level of imperfections tolerated by B16.5 is seal... Orientation and number be returned to service are, at some parts, unrealistic personnel and Process qualification requirements the... Is being asked Southwest Louisiana to handle Learn about parts that John has... Flange facing finish for RAISED face in lieu of the same defect pressure... Lectura y publicación más importante del mundo finish having from 30 to 55 grooves per inch used! On acceptance criteria for grade n of ISO 3601-3 requirements of the bolting PCC-1-2010 appendix be... A chisel corrosive environments about parts that John Zink has printed on the Studio System and more who. Criteria for grade n of ISO 3601-3 2, 3/10/09 4 the Owner and Designer are for... Iso 3601-3 on acceptance criteria are based upon a comparison against ASTM reference radiographs which! Gasket being used in lieu of the gasket seals across the flange “ fit ” to returned. Determined by ASME is acceptable as is A. Carucci a previous article highlighted primary. It comes to functional prototypes, 3D printing is rewriting the rules of what’s possible and handling practices Reforming flange... Never be … two flange faces happen 5 ( best to worst ) for helping keep Forums... Each joint consists of two mating flanges with a gasket to conform to and seal the flange “ fit to. On acceptance criteria to handle the purpose of surface finish damage are indentations that occur from removing used...