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flange serration acceptance criteria

@2021 - Oilman Magazine, LLC. 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. Flange size and pressure rating is given in Table 1. 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. Box 40443 Houston, TX 77240-0443 11906 FM 529 Houston, TX 77041 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. 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. This author does not have any more articles. Questions about Flange face, height, and serrations. 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). 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. LANL Engineering Standards Manual PD342 Chapter 17 Pressure Safety Section D20-B31.3-G, ASME B31.3 Process Piping Guide Rev. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 … I have used different criteria for flange face (gasket surface) damage evaluation at several different refineries throughout the U.S. -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. … LANLEngineering Standards Manual ISD 341-2 Chapter 13, Welding & Joining Section WFP 2-01 – Welding Fabrication Procedure Rev. Click Here to join Eng-Tips and talk with other members! This damage is usually small, somewhat rounded areas of concentrated material loss created by corrosion. Banks Industrial Group offers rapid metal repair and reforming of flange faces damaged by corrosion, erosion or mechanical work. He is currently working as Field Engineer in an LNG Liquefaction Project in Southwest Louisiana. 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. The flange face is predominantly prone to crevice corrosion when flanges are used in extremely corrosive environments. Bob Rasooli explains about Flange Face Finish Defect Acceptance Criteria based on ASME B16.5, the flange face … I have used different criteria for flange face (gasket surface) damage evaluation at several different refineries throughout the U.S. The RPL and depth of each of these Case A and Case B imperfections shall not exceed the values given in Table 3. The flange face is the surface area that hosts the gasket. Look at 16.5 flange face sections carefully. get whoever improperly handled it to provide you with a new one! A gasket’s role is to seal the space between the mating surfaces of a flange connection. Protrusions above the serrations are not permitted anywhere on the raised face. 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. When two adjacent imperfections are farther apart than the sum of their individual RPL, they shall be considered two independent imperfections. “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. gasket face repair on flanges for piping, equipment like HE, Column , vessels etc 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 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). 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. 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. In Handbook of Valves and Actuators, 2007. The paper by W. Brown elaborates on how to overcome this problem. 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.. Sheet metal forming is the most cost-effective forming procedure today for manufacturing parts at large quantities. (FSA) and the Flange Gasket Division of the European Sealing Association (ESA). Schedule 10, 30, 40, ,80, 120, 160, etc. ASME B16.5 requires that for flanges and flanged fittings the surface is to have a specific roughness. According to the ASME/ANSI specifications, the serrated, spiral serrated, and concentric flange face finish should have an average roughness of 125 µinch to … With these measurements, Table 1 can be accessed to determine the applicable limit for a particular type of damage. or larger radius. 1.2 Scope 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. 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. 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. 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. 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. He also gives recommendations of what is considered a better acceptance criteria. 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 … • Uneven Bolt Stress. 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 most common events that create surface finish damage are indentations that occur from removing previously used gasket material from the sealing surface. All the paths of leakage are effectively blocked between the gasket and flange. 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. https://oilmanmagazine.com/author/nirmal-surendran-menon/. ANSI AWWA C o a s t a l F l a n g e , I n c . Hi, Flange Face Surface Finish. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. 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. 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. Either a serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch is used. The corroded 24" flange face after composite repair. In general, there are four basic types of repair to consider: 1. One area where leakage is a concern is at the bolted flange joints. Umm, assuming it's already welded to a piece of pipe, which is why the question is being asked. 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. 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. 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). 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”). Also: There's usually a good reason why everyone does it that way. Removing the corroded flange and welding a new one, 2 All dimensions are in inches These flanges will be furnished with a 1/16" raised face unless 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. In particular, the application of ASME B31.3 requires compliance with the Inspector qualification The RPL shall include both defects. Limits are established by determining the effective length (in the radial direction) and matching it to the depth of the same defect. 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 RT acceptance criteria that have been addressed on QW- 191.1.2.2 refers to the welder or welding … 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. However, what if portions of the flange face are damaged? the in-service inspection of flanges to identify corrosion on the flange face. 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. When a flange face is damaged, it is no longer sealable by a gasket and should be either replaced or repaired. The question then becomes, how large is too large, or what is the limit on the number of small defects in a single area? If the flange connection is expected If the flange connection is expected to be used at temperatures higher than specified in Clause 8, O … 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. CLA) is possible. Figure 1. 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. *Eng-Tips's functionality depends on members receiving e-mail. flange face by taking measurements of the defective areas (see Figure 1). This Handbook is part of a mutual Appendix D includes figures and tables that provide guidelines for setting allowable limits on flange face defects. 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. 63 AARH : 32 to 63µ in AARH. Which instrument/comparator can I … 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 His interests include pipeline system cleanliness and loss prevention in LNG liquefaction facilities as part of project execution. Scribd es red social de lectura y publicación más importante del mundo. This Handbook is part of a mutual commitment to industry consensus technical education for This standard provides guidance for several important flange considerations. 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. These objects may include the bristles of a wire brush or a tool, such as a chisel. Corrosion Control in Hydrocarbon Facilities, Field engineer Coordinator / Quality Control Flange Specialist. 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. 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. Serration on the Flange Face. Frequently, this type of damage is created by a sharp object dragging across the flange face. - 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 And when it comes to functional prototypes, 3D printing is rewriting the rules of what’s possible. Copyright © 1998-2021 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. The acceptance criteria are based upon a comparison against ASTM reference radiographs, which are rated 1 through 5 (best to worst). The resultant surface finish has a 500 microinch (12.5 ㎛) approximate roughness. Radial Projected Length is only measured within the Gasket Seating Width. 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. Permissible Imperfections in Flange Face finish. 3mm is too much to expect a gasket to handle. 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. 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 … By joining you are opting in to receive e-mail. b) Spiral Wound Gasketing. Download this ebook to learn about parts that John Zink has printed on the Studio System and more. Flange Dimension Tolerances, Dimension Table, ASME B16.5 Flanges. Login. 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. Bolt tightening group approved w/ ID ASME B16.5 Flange Face Imperfection - Free download as Excel Spreadsheet (.xls), PDF File (.pdf), Text File (.txt) or read online for free. We also provide repair kits and training for your own staff to perform repairs. Only imperfections within the gasket seating width, “X” are to be considered as imperfections that can be rejected. All Right Reserved. A concentric or spiral serrated finish with 30 to 55 groves per inch and a surface roughness between 125 and 500 microinches. Photo courtesy of Slade Inc. Imperfections on flange faces happen. 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. 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. Pumps & Systems, July 2013 The purpose of surface finish is to allow a gasket to conform to and seal the flange face. However, depending on the force that created them, they can be deep. 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 If it's new, send it back! 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. acceptance is the criteria. Surface finishes below 1.6mm are not recommended due to their negative effect on creep resistance of the gasket. Dents sometimes result from equipment collisions caused by positioning the mating flanges using cables and rigging. The concentration of 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. The flange facings are machine finished toANSI/ASME B16.5 requirements. 4.8 Flanges and fittings manufactured from bar stock are not acceptable. 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 If it's on a pipe, weld repair followed by in-place re-facing is what needs to be done. 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. Subscribe to OILMAN Today, our industry newsletter covering oil and gas business news, events, information and trends shaping the market, delivered to your inbox. 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. The party who owns the facility wherein the vessel will be used. No part of the flange is subjected to direct bending as a result of the bolting loads. 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. Coastal Flange, Inc. P.O. Flange Face Repair & Reforming In situ application, reduce downtime, avoid hot work, reduce or eliminate spare flange inventory. Table – 3: Maximum Radial Project Length for Various. (Flange, Gasket, Bolts, Nuts and lubricant), careful preparation, cleaning, installation and assembly, correct bolt tightening and loading. This article provides more information about these. A brass wire brush is preferred. 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. Over time and for any number of reasons, damage can occur to flange faces. This type of damage can be sharp or blunt non-elongated areas caused by some form of impact. Hi, Flange Face Surface Finish. The RPL and depth of the joined imperfection shall not exceed the values given in Table 3. 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. exceed the O-ring quality acceptance criteria for grade N of ISO 3601-3. 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. My motto: Learn something new every day Does anyone have any literature or guidelines they would like to share on acceptance criteria of gasket surfaces? 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. 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. The only explanation for the level of imperfections tolerated by B16.5 is to sanction poor fabrication and handling practices. Imperfections on flange faces happen. - 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. Is the flange “fit” to be returned to service? He has more than 12 years of experience in EPC projects in the Oil/Gas/Petrochemical sector. “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. 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. Figure – 2: Representation of the Flange Face that shows defects and illustrates various cases for applying criteria to accept imperfections in Flanges. Registration on or use of this site constitutes acceptance of our Privacy Policy. Only imperfections within the GASKET SEATING WIDTH are evaluated as a rejectable detect. Unless the imperfection is a protrusion, an imperfection completely outside the GASKET SEATING WIDTH (X) is acceptable as is. Flanges with different faces require different gaskets and shall never be … These are wide and elongated with blunt, rounded bottoms and are created by a dull object dragging across the flange face. What are the permissible imperfections or acceptance criteria in Flange facing finish for RAISED FACE FLANGE? 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. This is not only time consuming but … Serrated Finish/125 AARH : Serration with 125 to 250µ in AARH. Appendix to Article – Flange Face Inspection Criteria. 1, 10/27/06 Attachment 2, ASME B31.3, “Process Piping” Acceptance Criteria Page 1 of 4 1 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. e.g. During last year's ASME PVP conference in Paris, Warren Brown presented several interesting papers on, amongst others, BFJ's (Bolted Flange Joints). Please let us know here why this post is inappropriate. The gasket seals across the full flange face width surrounding the bolting. From: The Fundamentals of Piping Design, 2007Related The integrity of a safe seal depends upon the selection of correct components appropriate for the application. 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. 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. The current acceptance criteria in B16.5 for flange imperfections are, at some parts, unrealistic. The material discussed here is is an epoxy-based composite for metal repair. The RPL and depth of each separate imperfection shall not exceed the values given in Table 3. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. Will the flange leak if used or should the end user replace it? 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. 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 Already a Member? 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. Gouges can be caused by objects—such as a screwdriver, flange jack or chisel. 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 … Promoting, selling, recruiting, coursework and thesis posting is forbidden. Tools, such as chisels or screwdrivers, should be avoided. The cutting tool empolyed has an approximate 0.06 in. Protrusions above the SERRATIONS are not permitted. The thing to keep in mind with this is that this is a specification for NEW flanges. Requirements that are specific to Code, Section VIII, Division 2 are shown in braces { }. Currently the majority of inspection of flanged joints is undertaken by periodically breaking the flange and visually inspecting the condition of the sealing faces. 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 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 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.

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