API SC6 Work Group Plan for Development of HPHT Flange

Design Requirements

Date: June 25th, 2015

To provide recommendations to create a roadmap for the development of flange requirements for those sizes not currently addressed by API 6A, inclusive of those that may require application of HPHT protocols and high external load capacities.

Work Group Charge

MEETINGS

• WG met on 6/17/2015 to discuss NWI from API SC6 winter meeting 2/4/2015.

• At meeting it was decided that the WG’s focus will be on developing the “road map” for the flange design vs. working on a particular size flange i.e. 18-3/4” 20K.

• Next meeting will be 7/9/2015.

POSSIBLE DESIGN CONSIDERATIONS• New flange cross-section• Make up Torque issues ( i.e. cf) • Bolt material• Gasket material concerns• Gasket leakage and deformation• Fatigue• Temperature design and materials concerns• Hub Separation • NACE• Design Criteria selection• Load capacities with and w/o Temperature

DESIGN METHODOLOGY EXAMPLE

Design Verification

Design meets Loadrequirements

Design Validation Testing

Fatigue AnalysisDesign meets Fatigue life requirements

Sealability Analysis

Design Flange

Structural and Functional Design Development

Hub Separation

Bolting

6A, 6X

Taylor Forge, Eichenberg

17TR8, PER 15K

Materials

FEA

ASTM, ASME

DELIVERABLES

To provided Recommendations for the following • Flange design philosophy• Design acceptance criteria• Flange external load capacities• Standardized flange geometry