What is the ASME definition of MAWP?
October 5, 2024
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What are HIC resistant steels?
October 5, 2024
Terms for hydrogen induced cracking processes of steels
October 5, 2024
What means ISO 5208 leakage rate A?
September 27, 2024
MAWP calculation procedure for design of pressure vessel
September 27, 2024
Frequently Answers and Questions about the PED
Which classification applies to pressure gauges?
Pressure gauges are pressure accessories within the meaning of PED Article 2, paragraph 5, which may be covered by CE marking for high pressure (see table below). Remark 1: Pressure gauges are not safety accessories within the meaning of PED
November 23, 2023
What are ISO/TR 15608 Material groups?
ISO/TR 15608 material groups according to their similar properties such as chemical composition, weldability and mechanical properties. However, it can also be used for other applications such as NDE or heat treatments. The standard covers grouping systems for the following
November 23, 2023
Which design methods are available for the design of Pressure Vessels?
Pressure vessels used in industry are leak-tight pressure containers, usually cylindrical or spherical in shape, with different head configurations. They are usually made from carbon or stainless steel and assembled (most) by welding. Dimensioning of a Pressure Vessel To design (wall
November 20, 2023
What is a European Approval for Materials (EAM)?
With the European approval for materials (EAM) process, new materials can be developed outside the standardisation process and are then considered approved. European material approval (EAM) is possible under the Pressure Equipment Directive if there is no harmonized standard for
November 1, 2023
Material
What is “Particular Material Appraisal” (PMA)?
The Particular Material Appraisal (PMA) procedure is one of 3 ways to approve a material for the specific requirements of the pressure equipment: That means, if a material has not been referenced by an EN standard or approved by the
November 1, 2023
What information in the EU-Declaration of Conformity is to be provided with regard to the harmonised standards applied?
The applied standards or other technical specifications (such as national technical standards and specifications) must be indicated in a precise, complete and clearly defined way in the EU-Declaration of Conformity; this implies that the version and/or date of the relevant
October 26, 2023
Why does the permissible membrane stress specified in the PED for ferritic steels according to EN 10028-3 and EN 10222-4 not apply?
Those fine grained steels are micro-alloyed steels for pressure purposes as, for example, those given in EN 10028-3 or in EN 10222-4. For these steels, the quantitative value of permissible membrane stress ( 2/3 Re/t and 5/12 Rm/20) stated in
October 26, 2023
What are materials and what are components for pressure equipments?
Materials are in contrast to components when they are manufactured by qualified and certified material manufacturers who can provide the corresponding material certificates which prove that the requirements of the harmonised material standard or material specification are fulfilled. Where a
October 26, 2023
What are main-pressure bearing parts?
The main–pressure-bearing parts are the parts, Examples of these parts are shells, ends, main body flanges, tube sheets of exchangers, tube bundles. The materials for these main-pressure-bearing parts of equipment of categories II to IV shall have a certificate of specific product
October 26, 2023
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