Table of Contents

1 Scope
2 Normative References
3 Terms and Definitions
4 Purchaser Responsibilities and Recommended Actions
5 Manufacturer Quality Management System Evaluation
6 Valve Qualification
7 Post Qualification
Annex A (normative) - Selection Quantities for
        Examination and Test of Valves Made in
        Accordance with API Valve Standards
Annex B (normative) - Strength Tests for Stem
        Shaft-to-closure Element Connections
Annex C (informative) - Suggested Minimum Acceptable
        Casting Radiographic Results for Wall
        Thickness < 50 mm (2 in.)
Annex D (normative) - Examination and Testing Tables

Abstract

Describes recommendations for evaluation of a manufacturer's valve construction and quality management system for the purpose of determining a manufacturer's capability to provide new valves.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Petroleum Institute
Pages
ISBN
Supersedes	API 591 : 2008