The series (Arbeitsgemeinschaft Druckbehälter – Pressure Vessel Working Group) is a set of technical rules in Germany. These rules provide the "recognized state of the art" for the design, calculation, production, and testing of pressure vessels.
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While many third-party sites may offer a "download," engineers are strongly advised to purchase the official PDF from the VdTÜV Verlag or authorized standards distributors. Using an unverified PDF from a random internet source poses a risk: if the document is outdated or altered, the pressure vessel design may fail certification, leading to costly rework or safety violations. ad 2000-merkblatt w0 pdf