1. API 17TR8: High-pressure High-temperature (HPHT) Design Guidelines
API Winter Meeting 2016
API 17TR8: High-pressure High-temperature (HPHT) Design Guidelines

2. Working Items of 2nd Edition
Materials workgroup
Material characterizations (standardized testing protocols)
Welding
NDE
Design Verification workgroup
Extreme & Survival Conditions
Fatigue input parameters - GoM
Hydrostatic pressure tests (Deepstar Project 12302)
Design Validation workgroup
API 17TR8 – 2nd Edition is targeted for June 2016 Ballot

3. Materials Work Group
Materials Work Group met several times in 2015 to:
Address materials related issues in 17TR8-SRRR 2nd Edition
Form the following work groups:
Material Characterizations (Paul Bunch, Steven Shademan, Ravi Krishnamurthy and Arshad Bajvani)
Welding (Nash Ubale)
Overlay Weld
Fabrication Weld
NDE: Flaw Sizing (Curtis Dickinson)

4. Material Characterizations
Material Characterization section has been developed to be added as an annex to API 17TR8
Material Test Procedures Draft Document
Defines test environments of:
Seawater with CP
Typical GoM Production Environment for Gas Wells and Oil Wells
Defines Environmental Screening per SSRT – NACE TM
Materials which pass SSRT defined as not susceptible to environment
Materials not susceptible to environment;
S-N fatigue, FCGR (if required) and FT to be performed in air at appropriate temperature.
S-N fatigue in air to be validated with a limited number of tests in environment
Materials Susceptible to environment;
S-N fatigue and FCGR (if required) to be performed in environment at appropriate temperature at a low frequency. Limited S-N tests in air.
FT to be performed in environment at appropriate temperature

5. Material Characterizations
Material Test Procedures Draft Document (cont’d)
Defines Strain Limit Environmental Reduction Factor per SSRT
SSRT ratios for % elongation and RA used as reduction factor for Strain damage material parameters defined in ASME Sec VIII, Div 2 and Div 3
Defines test parameters for Fracture toughness Testing, KIC and KIEAC
Test Types for Environmental KIEAC; rising displacement and WOL
Krates for rising displacement tests in environment
Defines Test Parameters for Fatigue S-N and da/dN vs ∆K in air and environment
Defines frequencies
Defines R ratios
Defined Strain Damage Test Procedures
Tests conducted using notched tensile at design temperature
Reduction factor per SSRT result
Tensile, True Stress-True Strain testing and Physical Properties

6. Material Characterizations
Material Characterization section was circulated for work group review and comments (11/8/2015).
Comments received and will be addressed by 1/30/2016

7. Material: Welding
Welding requirement section has been developed by the task group to be added to the existing API HPHT 17TR8 document:
Acknowledge ASME IX & API 6A (PSL-3) base case requirements for HPHT weldments
Determine if there are additional variables that need to be included
Identify additional testing for HPHT weldments per API 17TR8 (Article 6.3 & 6.4)
Develop qualification (WPS/PQR) philosophy for HPHT weldments
Provide these HPHT welding guidelines to API 17TR8 committee for review/approval
The Overlay Weld requirement section was sent out to members for review and comments (11/6/2015)
Comments have been collected and will be addressed by the task group members (1/30/2016)

8. Material: NDE Conventional Ultrasonic Sizing Methods
ID Creeping wave Methods
Tip Diffraction Methods
Bimodal Methods
HALT / HAST Methods
Refracted Longitudinal and Shear Wave Methods
Time of Flight (TOF) Diffraction
Phased Array
No one sizing method is best for sizing flaws of any depth, height, and/or type
NDE General guidance will be developed for API 17TR8 – 2nd Edition (1Q 2016)

9. Design Verification: Extreme / Survival
Verbiage drafted and implemented into existing 17TR8
Defined Definitions and Probability of Occurrence
Defined Design Factors
L-E & E-P
DRAFT

10. Design Verification: Extreme / Survival
Defined Function and/or Performance Post-Event(s)
Defined Potential Impact on Fatigue Life
S-N & Fracture Mechanics
Defined Bolting/Fasteners Design Factors
L-E & E-P
TABLE 3. PRESSURE CONTAINING BOLTING DESIGN STRESS ALLOWABLES
Operating Condition
Linear-Elastic
(membrane)
Elastic-Plastic (LRFD)(1)
Global Criteria
w/o Thermal Loads
w/ Thermal Loads(2)
Normal
0.83 × Sy
1.45
1.27
Extreme
0.9 × Sy
1.33
1.17
Survival
1.00 × Sy
1.2
1.05
NOTES:
The usage of the factors are defined as: LRFD × (P + Dx + T)
Material properties at elevated temperature are inherent to the material models used the LRFD analysis
DRAFT

11. Design Verification: Fatigue Input Parameters
Objectives:
To expedite the fatigue calculation process for Gulf of Mexico application
Identify and standardized input parameters
Last Work Group Meeting: October 28, 2015
Fatigue Input Parameters Template Completed
Request for input/information was circulated to industry on November 4, Response requested by March 2016.
Fatigue task group will review the data received and decide what to include into the TR8 document.
The time to complete this process will depend on the industry response and amount of data we receive.
Estimated completion: Summer 2016.

12. Design Verification: Fatigue Input Parameters
DRAFT

13. DeepStar Project: Hydrostatic Pressure Tests
Objectives:
Industry’s studies to assess each design path of HPHT design flow chart and the effects of:
varying hydrostatic test pressures on equipment’s strain limit damage/equivalent plastic strain and
its effects on fatigue life estimation and environmental cracking resistance
These studies are to include validation testing program of the analytical results
DeepStar’s Project – 20ksi Systems, incorporated 17TR8 objectives into their project work scope.
Project Champion: Chris Kocurek (COP)

14. DeepStar 12302 Executive Summary
20K working pressure for subsea equipment has been in discussion for several years now gaining more and more traction within the various operators.
This CTR will perform the design verification of a representative 5” 20K TEE, per API SC17 TR8 along with a proposed validation program.
This exercise will provide an example analysis that provides independent usage of API SC 17 TR8.
Additionally, this CTR would have current 20K contributors and operators comment on the scope of work and the outputs of verification.
This CTR is to help put into practice and provide independent design verification as outlined in TR8.

15. DeepStar 12302 Project Status
Generation of a functional specification, FMECA
Conduct pre-workshop to present proposed design methodology to DeepStar members and solicit input on gaps and path forward.
Design verification of 5” 20K tee body, flange, bolting & gasket
Proposed validation program, schedule, and cost.
Workshop for initial results and proposed validation program review.
Investigate the Effects of Hydrostatic Test Pressure Magnitude
Load monitoring approach recommendations
Cladding – NDE & Welding requirements, potential improvements
Development of potential extreme and survival limits
Comparison of Design Life to Total Life
Post-Workshop: present verification results, solicit gaps, path forward

16. Design Validation
All groups to provided general failure mode list if available to share
FMC, DNV, Maersk sent data in
Dec 10: Review general failure modes list with WG and agree on methodology
PR3 and PR4 level alignment and detailed requirements
Failure modes reviewed and categorization work is in progress due to lack of HPHT specific
Jan 8: Review general failure modes list
Finalize categorization of failure modes specific to HPHT environments
PR2 – PR4 assignment to failure modes provided by WG
Excel template generated and sent for review and additional comments from Verification and Validation workgroups
Feb 5: Finalize general failure modes list to present to TG
Meeting held in ABS Katy Office