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The purpose is to illustrate that the beta (β) in EN 13480-3 formula 6.4.6-1 and 6.4.7-1 can become negative and leads to invalid results.
Most calculators and software will probably disregard the invalid result, but it could be improved in the EN 13480-3 to prevent misunderstanding.
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We are happy to announce that the B12 software application with the ASME B31.12 design calculation is released. The growing interest in processing and production of Hydrogen resulted in many requests to Red-Bag to develop the calculation code software.
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Red-Bag has released the new PCC 4.1.12.
Updated calculation codes to the following versions:
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Introduction
This document provides the rationale (arguments) for the definition of the limit calculations as used in document ‘EN 10253-2 vs EN 13480-3 Tee limit definition Type B DN800xDN500 S4 rev.1’ of August 18, 2023.
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Introduction
The intention of the Tee area figures is to provide a calculation method and understanding which allows to make calculations for standard EN 10253, ASME B16.9 and custom Tees. The area figures are supposed to be close to the EN 10253 dimensions as possible. It is not the intention to validate the EN 10253 approach. However we provide feedback on the statements made in above emails
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Summary
The purpose of this document is to propose a piping tee dimension definition for standard tee- and custom designed tee calculation in EN 13480-3.
The previous proposal with a straight-line distance definition for the limits, from the run side and branch side, resulted in significant differences with the EN 10253-2/4 approach. The limits are the lines that define borders of the pressure area and the material area in the calculation in Clause 8.
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Introduction
The EN 13480-3 scope is specified as ‘the design and calculation of industrial metallic piping systems, including supports. The design criteria, as laid out in clause 4, include the internal and/or external pressure amongst others
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The dimensions standard EN 10253-2 (and also EN 10253-4) have further detailed the calculations of EN 13480-3. The EN 10253-2 calculations are based on the EN 13480-3 but tailored to the EN 10253-2 fittings.The fitting types are elbow, tee, reducer and cap. The calculations are now part of our E80 application.
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There are cases with manhole blind flanges where the number of bolts are not enough for a proper leak tight connection with the flange at the storage tank side. The blind flange takes the shape as an ‘umbrella’ around the bolts.
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This document is for discussion, comments and suggestions. The purpose is to demonstrate the dimensions of the 42” 150# flange in relation to bolt load requirements for leak tightness. The 300# flange is used to illustrate the differences and the cause for possible tightness problems in case a spiral wound gasket is used
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This article informs about the letter sent from Red-Bag to the ASME B31.3 committee subgroup materials SG-D.
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Introduction
This document is for discussion, comments and suggestions. The purpose is to compare and validate the EN 10253-2/4 strength calculation in B.4.4 and B.5.3 with the EN 13480-3 Clause 8. The EN 10253-2/4 indicate that the calculations are based on the EN 13480-3. This document highlights possible differences.
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There is sometimes confusion about the joint efficiency when you compare the ASME B31.1 and the ASME B31.3. The joint efficiency for the ASME B31.1 (2020) are included in the allowable stress values of Table A-1 (US Customary units). Be careful, because some tables are also available is SI or metric units.
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EN 13480-3 Clause 7.2.3 Possible ambiguous result
Red-Bag is member of the CEN/TC 267/WG3 workgroup. This workgroup is responsible for the maintenance and improvements of the EN 13480-3 Industrial Piping and Pipelines standard.
Red-Bag is developer and provider of software for the calculation according the EN 13480-3. The software is used by Notified Bodies to assess the validity of the engineering calculations submitted by plant owners, engineering companies and manufacturers.
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The international customer base is growing in all Spanish speaking countries including Spain in Europe and especially the countries in South America. Our goal is to provide easy communication for our customers. We are happy to announce that Red-Bag has an agent in Spain with whom customers can communicate in the Spanish language. Use this Spanish contact form to contact our agent.
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Many of us have the impression that the bolt stress will go up when a flange pair in a pipe system is pressurized after assembly.
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Red-Bag User Day May, 2019 took place in the new industrial location of RDM Rotterdam. We have had a successful start of the Technical Journey with a motivated group of participants.
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We are happy to announce that our new address is:
Red-Bag BV
Klinknagelstraat 2
3089 JP Rotterdam
Netherlands
Tel.: +31(0)10 790 0062
New VAT nr.: NL859323808B01
All relevant contact and email addresses remain the same. Contact us at
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Red-Bag User Day April 12, 2017 - Delft - The former industrial building of Lijm & Cultuur created a splendid technical environment for technical presentations and sharing experiences.
