TG3 17TR8 Liaison Report HPHT Design Flow Chart API SC6 Meeting TG3 17TR8 Liaison Report HPHT Design Flow Chart API SC6 – June 25, 2015

API 17 TR8 HPHT Design Guideline Technical Report First Edition Published February 2015 Work on Second Edition has already started Seven work groups: design analysis, materials, material characterization, ASME subsea, ASME B31.8, design validation, and fatigue input parameters Monitoring DEEPSTAR 5”-20K effort Intend to have working draft by year end API SC6 Roundtable - Feb 2013

ASME Div 3 Work group established to address normal, extreme, and survival conditions Definitions have been proposed and are moving through committee. Borrowed from nuclear codes to translate API terminology to ASME Language to address differential pressure, waves, and current loads is also being proposed Appropriate LRFD factors are being studied API SC6 Roundtable - Feb 2013

Functional Specifications ASME Div 2 and Div 3 require a User Design Specification (UDS) API 17TR8 replaces this with Functional Specification: “The equipment end-user/operator should provide a complete functional specification as the basis of design for the equipment using a life-cycle approach with sufficient details for the manufacturer to conduct the design analysis or design verification in accordance with HPHT Design Flow Chart (Figure 1) and the guidelines of this technical report.” In addition to pressure and temperature, the Functional Specification defines environment, mechanical/structural loads, cyclic/life-cycle requirements, corrosion, etc. Proposal: Each SC6 product specification could define a Functional Specification for 20K equipment. Anything outside this envelope would require additional verification and validation. API SC6 Roundtable - Feb 2013

Linear Elastic Analysis Simplified TR8 Flowchart Existing 20K Within Standard Spec? Yes API 6A / 6X ASME VIII Div 2 ASME VIII Div 3 No Linear Elastic Analysis Linear Elastic Analysis No Elastic-Plastic Analysis Elastic-Plastic Analysis Yes Plastic Collapse Tri-axial stress Ratcheting Plastic Collapse 2.4 Local Strain Ratcheting Plastic Collapse 1.8 Local Strain Ratcheting Hydrotest TP = 1.5 x RWP Hydrotest TP = 1.25 x RWP No Fatigue Sensitive Fatigue Sensitive Comply Yes Yes S-N Fatigue FM/S-N Fatigue Yes No No Validation