Useful Links

Exida

Partner organization providing documentation and certification services for Safety Instrumented Systems under standards including IEC 61508 & IEC 61511.

 

European Directive Homesite

Official New Approach Directive website. Contains text for all current directives and status on all harmonized standards.

 

Pressure Equipment Directive

Official European Commission Pressure Equipment website. Good information with listing of notified bodies and published interpretations.

 

Valve Manufacturers Association of America

VMA represents the interests of over 100 U.S. and Canadian valve and actuator manufacturers.

          Source of IEC standards.  Guidelines and FAQs on IEC 61508.