Association Française de Normalisation
AISI American Iron and Steel Institute
ANSI American National Standards Institute
API American Petroleum Institute
ASME American Society of Mechanical Engineers
ASTM American Society of Testing Materials
AWWA American Water Works Association
BSI British Standards Institution
DIN Deutsches Institut für Normung

(Deutsche Industrie Normen)

FM Factory Mutual
ISO International Standardizing Organization
JIS Japan Industrial Standard
MSS Manufacturers Standardization Society for the Valve and Fitting Industry
NACE National Association of Corrosion Engineers
UL Underwriters Laboratory
UNS Unified Numbering System