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

2. 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

3. 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

4. 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

5. 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