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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: PED Engineering

Standard bodies
Shell-and-tube heat exchangers: Applicable Codes and Standards

Various heat exchanger design codes are also available for shell and tube heat exchangers and are used worldwide for different industries. The shell and tube heat exchanger is by far … more

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Can a control system be a safety accessory within the meaning of the PED?

In order for a control system to be classified as a safety accessory, it shall be designed and placed on the market as an (more…)

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U-stamp and CE-Marking
Quick-actuating closures and quick openings closures

Quick actuating closures are in widespread use throughout industry. Quick-actuating or quick-opening closures are those that permit substantially faster access to the contents space of a pressure vessel than would … more

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What is the meaning of the expression “standard pressure equipment” on pipelines?

A standard pressure equipment is not specially designed and manufactured for a specific conveyance pipeline, but is intended for use in a number of (more…)

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Cryogenic
EN 13445: Cryogenic and low-temperature steels

Brittle fracture resistant steels at low and very low-temperatures (cryogenic temperatures) applications are increasingly becoming the focus of energy supply due to the increasing transportation of liquid gases. … more

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PED
Is the operational function of pressure accessory covered by PED?

According to the definition, a pressure accessory means a device with an operational function and having an identifiable pressure-bearing housing – i.e. the device (more…)

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EN 13445 series Pressure vessels
New Part 15 of EN 13445 series for hydrogen application

The European EN 13445 series of standards for the design, construction, inspection and testing of unfired pressure vessels made from steels and steel casting is supplemented with a further part. … more

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Is the PED applicable to vacuum insulation of pressure vessels?

Yes! Vacuum casings which do not have a maximum allowable pressure PS > 0,5 bar are therefore not pressure equipment in their own right. (more…)

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EN 13445 series Pressure vessels
EN 13445: Requirements of material used for non-pressure parts

For non-pressure parts, e.g. for supporting lugs, skirts, saddles, baffles, brackets, and similar parts welded to pressure vessels, material shall be used which are supplied to material specifications covering at … more

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