API 671 : 2007

SPECIAL PURPOSE COUPLINGS FOR PETROLEUM, CHEMICAL AND GAS INDUSTRY SERVICES

American Petroleum Institute

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API Foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Statutory requirements
5 Coupling selection
6 Coupling design
7 Coupling ratings
8 Coupling requirements
   8.1 Metallic flexible-element couplings
   8.2 Machining
   8.3 Spacer
   8.4 Hub type
   8.5 Integral flanges
   8.6 Hubs
   8.7 Solo plate (idling adapter)
   8.8 Moment simulator
   8.9 Component fit tolerances and potential
        unbalance calculations
   8.10 Fasteners (including studs)
   8.11 Electrical insulation
   8.12 Dynamics
9 Balance
   9.1 General
   9.2 Balancing methods
   9.3 Balance criteria
   9.4 Trim balance holes
10 Materials
11 Accessories
12 Manufacturing quality, inspection, testing and
   preparation for shipment
   12.1 Manufacturing quality
   12.2 Inspection and testing
   12.3 Inspection
   12.4 Testing
   12.5 Preparation for shipment
13 Vendor data
   13.1 General
   13.2 Proposals and contract data
Annex A (normative) - Torsional damping couplings and
        resilient couplings
Annex B (normative) - Gear couplings
Annex C (normative) - Quill-shaft couplings
Annex D (informative) - Factors for metallic element
        couplings
Annex E (informative) - Example of the determination
        of potential unbalance
Annex F (informative) - Examples of misalignments
Annex G (informative) - Coupling tapers
Annex H (normative) - Coupling guards
Annex I (informative) - Procedure for residual unbalance
        check
Annex J (informative) - Coupling datasheets
Bibliography

Abstract

Describes the requirements for couplings for the transmission of power between the rotating shafts of two machines in special-purpose applications in the petroleum, petrochemical and natural gas industries.