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Latest Articles

Orifice plate and orifice flanges
Hydrogen gasket compatibility for hydrogen applications
  • PREMIUM
Flange calculations methods
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Standard PN-Flange connection with external loads
ASME BPVC Sect. VIII: Welded Joint Locations Categories
Gasket selection for industrial piping EN 13480-3
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MAWP calculation procedure for pressure vessels
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ASME BPVC Sect. VIII Div. 1 – minimum, calculated and maximum test pressure

Category: Pressure Equipments - FAQs

hydrogen
Standards and specifications for steel materials in hydrogen systems

The infrastructure for hydrogen storage and transportation needs to be safely used for a carbon-neutral society. One of the most important issues for the (more…)

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EN 13445 and ASME BPVC Section VIII
Welding Procedure Qualification (WPQR) for Pressure Vessels EN 13445 series

The approval of welding procedure qualifications (WPQR) is usually based on a harmonised standard such as EN ISO 15614-1. However, if it is based on another document, the PED should … more

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Terms for hydrogen induced cracking processes of steels

The hydrogen induced cracking of steels takes place according to different processes. Both the environmental conditions and other influences such as stresses and the (more…)

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PED Pressure Equipment Directive
What means? – Sound Engineering Practice (SEP) in acc. to PED

The PED requirements for SEP classified pressure equipments are contained in article 4 para. 3 of the Pressure Equipment Directive. “Sound engineering practice“ SEP means that this pressure equipment has … more

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What are HIC resistant steels?

HIC-resistant steels are used when carbon steel is exposed to hydrogen sulphide (H2S) in the acidic or humid H2S environment of electrochemical corrosion reactions. (more…)

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metal bellows expansion joints
Metal Bellows Expansion Joints for pressurised piping systems: Applicable Design Codes and Standards

Metal expansion joints are flexible connections to allow axial, lateral or angular motion. They are installed in industrial piping, pressure vessels, heat exchangers and other pressurised systems to accommodate expansion … more

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Pipes and line pipes
Pipes for pipelines: Comparison of ISO 3138 with API Spec 5L pipes

API Spec 5L specifies requirements since 1928 for manufacture of Line Pipe. The scope of the current issue is defined as: “Requirements for the (more…)

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U-stamp and CE Marking
Metal Expansion Joints for “Pressure Vessels”: Applicable Design Codes and Standards

Different requirements apply to expansion joints for pressure vessels and Shell and Tube Heat Exchangers than for pipings. These usually have to be designed for higher pressures and the axial … more

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PED Pressure Equipment Directive
What are essential safety requirements for products under EU legislation?

A fundamental feature of a large part of Union harmonisation legislation is to limit legislative harmonisation to the essential safety requirements (ESR) that are (more…)

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