API 7NRV : 2006 : R2012
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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SPECIFICATION FOR DRILL STRING NON-RETURN VALVES
English
10-07-2006
14-01-2020
1 SCOPE
2 NORMATIVE REFERENCES
3 TERMS AND DEFINITIONS
4 REQUIREMENTS
4.1 General
4.2 Design requirements
4.3 Functional considerations
4.4 Design considerations
4.5 Verification test
5 MATERIALS
5.1 General
5.2 Metals
5.3 Non-metals
5.4 Traceability
6 QUALITY CONTROL REQUIREMENTS
6.1 General
6.2 Documentation retention
6.3 Personnel qualifications
6.4 Calibration systems
6.5 Inspection of elastomeric materials
6.6 Dimensional inspection
6.7 Thread inspection
6.8 Welding and brazing
6.9 Qualification of heat treatment equipment
6.10 Coatings, overlays, and surface treatments
6.11 Mechanical and physical properties (where required by this
Standard)
6.12 NDE requirements
7 TESTING
7.1 General
7.2 Verification testing
7.3 General requirements for an NRV verification test facility
7.4 NRV verification test procedure
7.5 NRV Nitrogen Pressure Test
7.6 NRV Hydro Pressure Test
7.7 NRV Cycle Test
7.8 NRV Erosion Test
7.9 RV Float Sub and NRV Landing Nipple testing
7.10 NRV Equalizing Head testing
7.11 Verification test for seal materials
7.12 Production Testing
8 IDENTIFICATION, DOCUMENTATION AND PREPARATION FOR
TRANSPORT
8.1 Identification
8.2 Documentation
8.3 Preparation for transport
APPENDIX A MINIMUM TEST DATA
APPENDIX B API MONOGRAM
Provides the minimum acceptable requirements for Drill String Non-return Valve (NRV) equipment.
| DevelopmentNote |
Also available in Chinese edition, API 7NRV CHINESE. (01/2014)
|
| DocumentType |
Standard
|
| Pages |
32
|
| ProductNote |
Reconfirmed 2012
|
| PublisherName |
American Petroleum Institute
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
A newer version of this standard is available.
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