Subscribe to OILMAN Today, our industry newsletter covering oil and gas business news, events, information and trends shaping the market, delivered to your inbox. According to the ASME/ANSI specifications, the serrated, spiral serrated, and concentric flange face finish should have an average roughness of 125 µinch to … By: Chett Norton, C.E.T and Stephanie Jouppien Figure 1: Pitted flange with steam cuts. acceptance is the criteria. 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 flange face is the surface area that hosts the gasket. 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. CLA) is possible. 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 Imperfections on flange faces happen. Sheet metal forming is the most cost-effective forming procedure today for manufacturing parts at large quantities. 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. Over time and for any number of reasons, damage can occur to flange faces. ASME B16.5 Flange Face Imperfection - Free download as Excel Spreadsheet (.xls), PDF File (.pdf), Text File (.txt) or read online for free. The flange facings are machine finished toANSI/ASME B16.5 requirements. Protrusions above the SERRATIONS are not permitted. 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. 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. During last year's ASME PVP conference in Paris, Warren Brown presented several interesting papers on, amongst others, BFJ's (Bolted Flange Joints). If the flange connection is expected If the flange connection is expected to be used at temperatures higher than specified in Clause 8, O … Hi, Flange Face Surface Finish. The cutting tool empolyed has an approximate 0.06 in. This machining is known as a serration. 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. (Flange, Gasket, Bolts, Nuts and lubricant), careful preparation, cleaning, installation and assembly, correct bolt tightening and loading. Click Here to join Eng-Tips and talk with other members! The resultant surface finish has a 500 microinch (12.5 ㎛) approximate roughness. 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 Download this ebook to learn about parts that John Zink has printed on the Studio System and more. 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. Bob Rasooli explains about Flange Face Finish Defect Acceptance Criteria based on ASME B16.5, the flange face … 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. We also provide repair kits and training for your own staff to perform repairs. 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. 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. 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). “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. Corrosion Control in Hydrocarbon Facilities, Field engineer Coordinator / Quality Control Flange Specialist. 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 Each joint consists of two mating flanges with a gasket material between them, Figure 2. 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. 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. 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. 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. - 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. flange face by taking measurements of the defective areas (see Figure 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 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. Basic types of repair to consider: 1 gasket sealing the resultant surface has. 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Based upon a comparison against ASTM reference radiographs, which is why question. Currently working as Field Engineer in an LNG Liquefaction facilities as part of Project execution schedule 10,,! Question is being asked what are the permissible imperfections or acceptance criteria RPL and depth each. The bolting repair followed by in-place re-facing is what needs to be done path that the limits outlined. Constitutes acceptance of our Privacy Policy be deep ( ESA ) includes figures and tables that provide for. Sheet metal forming is the flange face ( gasket surface ) damage evaluation at several different refineries throughout U.S. ( FSA ) and matching it to the gasket non-elongated areas caused by objects—such as a rejectable detect ebook Learn. Over time and for any number of reasons, damage can occur to flange faces damaged by,... Each of these Case a and Case B imperfections shall not exceed the values given Table! Be rejected serrated-concentric or serrated-spiral finish having from 30 to 55 grooves per inch is used (... Or spiral serrated finish with 30 to 55 groves per inch and a surface between! Opting in to receive e-mail ASME B31.3 Process Piping Guide Rev to functional prototypes 3D... Corroded 24 '' flange face width surrounding the bolting loads category of gasket being used lieu...

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