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Latest Articles

Calculation tool for determining the PWHT parameters
  • PREMIUM
Hollomon-Jaffe Parameter: Minimizing negative effects through multiple PWHT Cycles
Leakage rate conversion
Hydrogen generator systems – safety requirements
  • PREMIUM
Piping Codes suitable for PED applications?
  • PREMIUM
Additional requirements for welding procedure qualification (WPQR) in accordance with EN 13445-4 clause 8.3
Carbon Equivalent formula for steel – An overview
CE (IIW) – Carbon Equivalent Calculator

Category: Pressure Equipments - FAQs

Rupture Disc with PRV
Difference “Pressure Safety Valve” and “Pressure Relief Valve”

Understanding the differences between Pressure Safety Valves – PSV and Pressure Relief Valves – PSV is essential for selecting the appropriate device for a (more…)

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PED
PED Declaration of Conformity – Requirements

The PED Declaration of Conformity (DoC) is a document attached to the pressure equipment, together with the CE marking, is the official proof for consumers, end-user, purchasers or the market … more

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Pipes and line pipes
Qualification of line pipes for pressurised hydrogen applications?

Piping in acc. to ISO 3183 and API SPEC 5L must be evaluated with regard to their suitability for the use of hydrogen. Additional (more…)

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pressure-gauge
EN 13445: Hydrostatic Pressure Test Requirements

The PED pressure test requirements are contain in the essential requirements in Annex I section 7.4. The hydrostatic pressure test is part of the final inspection in acc. to PED … more

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hydrogen material requirements
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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hydrogen material requirements
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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