Industry guidance · UK • In force
SHAPA — Discharge aids, technical guidance
The Solids Handling and Processing Association is the British trade body for bulk materials handling. Its technical guidance on discharge aids is one of the few freely available, supplier-independent reviews of the field, and it is useful precisely because it is not selling anything in particular. It describes the differences between the types of aid and where each belongs.
Relevance: Independent introduction to what exists.
Source: shapa.co.uk
Industry guidance · Bulk solids • In force
Jenike & Johanson — poor flow, causes and remedies
The firm was founded by Andrew Jenike, who developed the shear test described in ASTM D6128 and formulated the distinction between mass flow and funnel flow. Their technical material is the best freely available introduction to why material sticks, and to when the problem should be solved with geometry rather than equipment. It is worth reading even when you sell equipment, because it is the same analysis a competent customer will have carried out.
Relevance: The foundation of the discipline's thinking.
Source: jenike.com
Tool · Sizing • In force
OLI Calculator — the manufacturer's sizing tool
OLI provides an online sizing tool that walks step by step through application type, dimension and power supply, that is silo and hopper, compacting table, truck or chute and pipe, and electric or pneumatic drive. The tool is multilingual and continuously updated. In our assessment it is better than the sizing pdfs that competitors draw organic traffic from, but it is also almost invisible, because nobody links to it.
Relevance: Concrete sizing, straight from the manufacturer.
Source: calculator.olivibra.com
Reference · Harmonised standards • In force
PTB — summary list of harmonised ATEX standards
The Physikalisch-Technische Bundesanstalt, the German national metrology institute, publishes a consolidated overview of the standards giving presumption of conformity under the ATEX Directive, showing when each was cited in the Official Journal and when older editions cease to apply. In practice it is the most usable entry point to the question of which edition of a standard applies right now, because the Official Journal's own lists are hard to navigate.
Relevance: Check which edition applies before citing one.
Source: ptb.de
Reference · Machinery Directive • In force
Implementing Decision (EU) 2023/1586 — harmonised machinery standards
The consolidated list of standards giving presumption of conformity with the Machinery Directive. Every machinery standard in this wiki has been checked against the consolidated version of 15 November 2025, and the designations are reproduced verbatim from it. When the Machinery Regulation applies from 20 January 2027, the list will have to be re-cited under it, and the designations here will need checking again.
Relevance: The source behind every machinery standard on this page.
Source: eur-lex.europa.eu