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Standard PN-Flange connection with external loads
Spectacle Blinds and other Line Blinds
Additional requirements for welding procedure qualification (WPQR) in accordance with EN 13445-4 clause 8.3
Flange gaskets characteristics
Flange calculations methods
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Orifice plate and orifice flanges
Hydrogen gasket compatibility for hydrogen applications
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ASME BPVC Sect. VIII: Welded Joint Locations Categories

Category: PED Engineering

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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PED -Table-9
PED Category Calculator – Piping (Liquid – Fluid Group 2)

The PED Category calculator for piping is a useful tool to calculate the category. Once the category is determined, the conformity assessment module can be selected. PED Category Calculator Piping Select the … more

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Austenitic stainless steels: What is the difference between “L” grade and “H” grade?

The common austenitic grades of stainless steel, such as 304 and 316, are also available “standard” and with controlled low carbon “L” or high (more…)

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PED-table-8
PED Category Calculator – Piping (Liquid – Fluid Group 1)

The PED Category calculator for piping is a useful tool to calculate the category. Once the category is determined, the conformity assessment module can be selected. PED Category Calculator Piping … more

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ISO 15614-1: Which range of material groups according to ISO 15608 are qualified?
A welding procedure qualification record (WPQR) in acc. to ISO 15614-1 qualifies a welding procedure for steels and specifies conditions for the range of qualification. …
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