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Definitions (257)
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af - across the flats
Measurement between 2 parallel faces on a nut. Indicates the size of spanner or socket required to tighten or loosen the nut. Further Reading
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ist
Integrated Systems Test Further Reading
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en - euronorm
Standard issued by CEN/CENELEC normally prefixed by the national issuing body e.g. BS EN Further Reading
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primary element
An element that converts a measured variable into a force, motion or other form suitable for measurement. Further Reading
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#
Symbol used for pounds (lbs) especially with reference to flange rating e.g. 150# is understood to mean 150 lbs. Further Reading
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17.4ph
A martensitic steel that hardens structurally during treatment which results in the achievement of considerable hardness. Further Reading
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3.1b certificates
Material Certificates as described in BS EN 10204 Metallic products. Types of inspection documents. Further Reading
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316l
A low carbon grade of 316 stainless steel. Further Reading Stainless Steel Toolbox Page
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eu directive 94/9/ec
EU Directive 94/9/EC - known as ATEX - covers equipment and protective systems for use in potentially explosive atmospheres. Further Reading
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iec 61508
International best practice standard concerning specification; design; installation; testing and maintenance of safety systems. Further Reading SIL Ratings Guide
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