Flange design calculator

19.12.2020

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Related Projects. Dear All, I have a vessel 12" with body flanges I selected the flange acc. ASME B I specified standard flanges acc. I would ask the client to motivate their request: it might be justified by some special conditions e.

Take a look at UG a 2 and UG There you can confirm what prex is saying. The fact that these are body flanges indicates that the flanges may be subjected to loads from weight, wind, seismic, etc. In this case additional axial force and bending moment may be acting on the flange.Treater vessels separate oil, water and solids from an oil well.

A firetube heats the liquid mixture lowering the viscosity allowing better gravity separation of the oil. Horizontal treater vessels locate one or more firetubes in the head. Vertical vessels locate it in the shell. Fig 1 — Flanged obround nozzle with firetube and gasket. Large obround nozzles like those used on treater vessels can be a regular source of field trouble. The nozzle and flange can be subject to high stresses and deflections that interfere with adequate gasket seating.

This can show up as a flange that cannot be kept leak free without difficulty. The design of an ASME compliant obround nozzle is a combination of many mandatory inter-relating code passages. In our practice we are regularly asked to redesign obround nozzles that either do not meet all the required code rules, or do but still leak.

Designing Trouble-Free Large Obround Nozzles

To be certain our obround nozzles will be trouble free we first make sure that all applicable code rules are met. This combination has helped us design reliable firetube nozzles.

This article follows the design of a sample firetube nozzle through first the code design and then the FEA stages. The specifications:. This is typical for firetube vessels we design. The calculations are discussed throught the article. The difference between the required thickness 0. The U shaped firetube needs to be removable, so it has to pass through one large flanged opening instead of two smaller nozzles. A single large obround nozzle that minimizes the size of the flat cover on the firetube is the standard solution.

ASME VIII-1 allows obround nozzles to be designed to code rules when the large to small opening dimensions make a ratio of or less. When the long dimension is more than 2 times the short dimension, alternate methods such as FEA analysis from VIII-2 or burst testing must be used. Many obround firetube nozzles meet this criteria.More Information. Structural Deflections and Stress Menu. Vibration Design and Engineering. Heat Transfer Engineering. Simple Mechanical Levers Calculators.

Our trainer is certified per. ASME Y Membership Register Login.

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Copyright, by Engineers Edge, All rights reserved. More Information Note: Many of the links first open an equations web page. Look for the the "Calculators" link to open the actual calculator application. Not all web page actually open to a calculator at this time, however there will be the associated calculator in the near future.

Left vertical member guided horizontally, right end pinned. Circular plate, uniform load, edges simply supported equation and calculator. Circular plate, uniform load, edges clamped equation and calculator. Roarks Formulas for Stress and Strain Formulas for flat plates with straight boundaries and constant thickness.

Roarks Formulas for Stress and Strain. Flat Rectangular Plate; two long edges simply supported, two short edges fixed Uniform loading over entire plate Stress and Deflection Equation and Calculator. Roarks Formulas for Stress and Strain Formulas. Flat Rectangular Plate; two long edges fixed, two short edges simply supported Uniform loading over entire plate Stress and Deflection Equation and Calculator.And in this case, no need to proceed a flange design calculations as prescribed for non-standard flanges.

See the following site to find the max. Thanks in advance Praphulla. Bentley WinNozl 3. Chemical Process Simulation and the Aspen Computer Software for Project Management Computer. My threads; eriyanto. Taufik Junior Mechanical Engineer My threads; m. Remember Me? Last Jump to page: Results 1 to 12 of My threads; Abdel Halim Galala :. Spons Circuit. Join Date Always Posts Many.

Join Date Oct Posts Thank you Abdel Halim. My threads; Kamel :. Sponsored Links. Join Date Dec Posts 5. My threads; dr4u :. Join Date Feb Posts Hi Mr Galala Can you please share the spreadsheets of the above calculations?

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My threads; praphulla. Join Date Sep Posts My threads; Tiberius :. Join Date Jul Posts I imitate the calculation sheet from the website [link Point to another website Only the registered members can access] Try it, and your any comments is welcome.

My threads; ccpjeff :.

Gaskets – Basics, Types, Working Principle, Calculation of bolt load

Join Date Jan Posts My threads; tinku :. Join Date Aug Posts My threads; dragonpvgas :. My threads; bapug98 :. Taufik Junior Mechanical Engineer. My threads; m. Last Jump to page:. Replies: 24 Last Post:PM. Replies: 24 Last Post:AM. Replies: 2 Last Post:AM. Replies: 31 Last Post:PM.More Information.

Bolted Flange Design Spreadsheet

Structural Deflections and Stress Menu. Vibration Design and Engineering. Heat Transfer Engineering. Simple Mechanical Levers Calculators. Our trainer is certified per. ASME Y Membership Register Login. Copyright, by Engineers Edge, All rights reserved. More Information Note: Many of the links first open an equations web page.

Look for the the "Calculators" link to open the actual calculator application. Not all web page actually open to a calculator at this time, however there will be the associated calculator in the near future. Left vertical member guided horizontally, right end pinned. Circular plate, uniform load, edges simply supported equation and calculator. Circular plate, uniform load, edges clamped equation and calculator. Roarks Formulas for Stress and Strain Formulas for flat plates with straight boundaries and constant thickness.

Roarks Formulas for Stress and Strain. Flat Rectangular Plate; two long edges simply supported, two short edges fixed Uniform loading over entire plate Stress and Deflection Equation and Calculator.

Roarks Formulas for Stress and Strain Formulas. Flat Rectangular Plate; two long edges fixed, two short edges simply supported Uniform loading over entire plate Stress and Deflection Equation and Calculator.

Flat Rectangular Plate; one edge fixed, opposite edge free, remaining edges simply supported Uniform loading over entire plate Stress and Deflection Equation and Calculator. Flat Rectangular Plate; one edge fixed, opposite edge free, remaining edges simply supported loading Uniformly decreasing from fixed edge to free edge Stress and Deflection Equation and Calculator.

Flat Rectangular Plate; one edge fixed, opposite edge free, remaining edges simply supported loading distributed line load Per. Flat Rectangular Plate; all edges fixed. Uniform loading over small concentric circle of radius r o note definition of r' o Stress and Deflection Equation and Calculator. Roarks Formulas for Stress and Strain for flat plates.Jump to navigation.

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We believe that high quality products can only be manufactured with highest care taken during whole process of production. That is why our manufacturing centre is situated in Poland. European standards and regulations ensure the quality and readiness of our high duty applications. All such bespoke sealings are our specialty — so next time if you seek a gasket made from special alloy, a seal to be supplied with special approvals, packing delivered in a short time or you simply need any other high duty sealing solution - check out our production program and send us an enquiry about your requirements.

Flange connection designers are confronted with a growing number of standards, regulations, and templates which they must take into account in their work. The main difficulty being the necessity to adopt calculation coefficients for gaskets when calculating assembly and operating tension valves. No one method is universal. In this paper a new software program is outlined that can calculate any gasket defined by the user, hereby considerably reducing the complicities of this design procedure.

Introduction Designers have at their disposal a growing number of standards, regulations and templates describing such connection calculation algorithms.

They are often faced the necessity of calculating one single to the connection according to several standards. In addition there is the necessity to conduct calculations in accordance with regulations corresponding with the relevant European Union pressure directives. In general, calculation algorithms can be divided into two groups. The first group includes those of which the application automatically, by implication, assures compliance of the conducted calculations with the said directives.

The second group includes those calculations which require, if necessary, conformity approval. Due to the SPETECH production range, that is, gaskets, we are interested in those parts of the above mentioned standards which apply to flange connections. The main difficulty encountered by flange connection designers is the necessity to adopt calculation coefficients for gaskets when calculating assembly and operating tension values.

In the enclosed screenshots or separate standards, the first group algorithms have relevant factor values for currently used sealing materials such as, for example, fibre and elastomer gaskets, expanded graphite or ePTFE.

These values are presented there as being possible to use, provided that the seal manufacturer does not give specific, own factor values. Unfortunately, the second group algorithms do not provide such factor values.In this article, we will see about the Gaskets — Basics, Types, Working Principle, Calculation of bolt load and Gasket material properties.

Before we start, first we will discuss the seals and classification in this introduction. To read about gasket selection click here. Leaky pipe flanges, leaking stuffing boxes, leaking joints of all kinds have cost millions of dollars yearly. A static seal is a packing, designed to go between two rigid parts of a container in an essentially stationary relationship. Most widely used static seals in industries are Gaskets or O-rings. Gasket collectively is material in sheet, strip or bulk form from which gaskets may be prepared.

The surface finish of the joint faces is also important in the sealing process. The spiral tool marks left on the flange face by a facing cut will leave a continuous path for leakage.

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Unless the gasket material fills the path fully. Otherwise, the end result more often than not is a leaky joint. For low pressures, gaskets made of soft materials such as cork, rubber, and asbestos are used. Refer below figure for gasket load acting. Compressive Load is the forced that initially compresses the gasket.

flange design calculator

It is usually applied by bolting. It must be sufficient to squeeze gasket into all voids in the faces of the flange ie. So that they will mate to achieve a tight seal that will have no paths for leaks. When the internal pressure is applied to assembly ie. The difference between the initially applied force compressive load and the hydrostatic end-force is the residual load act on the gasket.

The internal pressure act on the joint tends to blow out the gasket material.

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Two methods are also used to estimating the bolt load actually applied on the bolted joint. Bolt stresses as a function of torque are available in standard handbooks. A general relationship is given below:. The very accurate measurement of bolt load is obtained by bolt elongation using an extensometer or strain gauges.

When a gasket joint is placed in service so that an internal pressure is present.

flange design calculator

Due to the internal a new force is created is called the hydrostatic end force. The hydrostatic end force is calculated by. The effect of this hydrostatic end force is highly dependent upon the particular assembly. If the Bolt load and Hydrostatic end pressures become equal.

flange design calculator

The ASME code for unfired vessels presents the most commonly used design methods for gasket joints.