API 17 – Subsea Boosting Discussion
Recommended Practice for Integrity Management,
Qualification Requirements, and Referenced Standards
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Purpose of discussion:
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Seek common ground and new insight into issues related to recommended practices for qualification and
integrity of subsea boosting equipment
Gauge interest in establishing a focused industry group in API committee 17 to address this topic
Talking Points:
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An industry standard RP on subsea boosting should help gain project approvals from regulatory agencies
Need standard approach to defining risk and required risk mitigation – Hopefully avoid potential
barriers to SS boosting project approvals
Can we continue to rely on “due diligence”, or should we have an agreed recommended practice?
What does “qualified” mean for SS Processing? Requirements to gain regulatory agency approval? To
ensure safety and integrity? Where/how to qualify?
Should qualification philosophy be “Test to Success” or “Test to Failure”? Standard guidelines for
qualification testing?
Qualification: should there be STD simulated fluids, viscosity, temp, gvf and STD output format
Could we use existing SS standards (API 17N,P,O,Q,D, ISO 13628)? – or is a new one needed to clarify?
Could other industry standards be utilized? DNV RP A203? Or ??
Do (or should?) standards define a “qualified “ system or just a systematic framework for doing things?
How have Operators adapted qualification processes to project requirements and timelines?
Item Area
1 Scope
Comments
Does scope need to be more limited or should it be exapnded
beyond these items?
- Pumps
- Motors
- Instrumentation and Controls
- Barrier fluid systems
- Pump mounted electrical
equipment (penetrators)
2
Design Requirements
Should standard design ratings be adopted in a similar manner to
other API equipment areas. i.e. 5,000 psi, 10,000 psi…… 0 to
250 F etc or should there be freedom to provide intermediate
application specific ratings? Should there be standard ratings for
motors? Is this practical?
2.1
2.2
Pump Assembly
Pump Casings
Invoke API 610?
What design codes should be used. Applying ASME VIII D2
leads to more conservative designs than well control equipment
(i.e. 2/3 Sy versus ~0.55 Sy @ 250F)
2.3
2.4
2.5
2.6
Motor Casings
Pump mechanical seals
Barrier Fluid Systems
Pump rotors / rotodynamics
See comment for item 2.2.
Invoke API 682?
Invoke API 682?
Design and analyse per API 610. Monitor vibration during FAT
per API 670?
2.7
2.8
Pump Motors
Piping
Invoke API 546 or API 547? Should motor types be discussed?
Apply ASME B31.8 like other subsea packages or is another
code more applicable? ASME B31.8 will yield less conservative
designs than ASME VIII D2
2.9
Flanges / Connections
Where practical use API flanges. Where not design and qualify
OEM connection in accordance with API 17D
2.10 Fasteners
In accordance with API 17D?
3
3.1
3.2
Pump System Design
Pressure Barrier / Isolation Philosophy
Attendant Equipment (i.e. connectors,
valves, frames etc.)
4
Pump Mounted Controls
4.1
Over pressure protection
5
Standard configuration schematics showing instrumentation locations and
minimum isolation philosophy?
Per Api 17D?
SIL Level. Redundancy limits and over pressure protection requirements?
Material and Welding Requirements
5.1
Pressure containing bodies
Forging, heat treating and quality requirements per ASME VIII D2 or per
API 17D / 6A?. Quality / inspection levels per API 17D / 6A or ASME VIII
D2. What code should be invoked for material test requirements or
vendor qualification requirements? Are there other applicable standards?
5.2
Pressure containing welds
ASME IX per API 6A / 17D?
5.3
Overlay welds
ASME IX per API 6A / 17D?
5.4
NDE
Per ASTM E94, ASTM A709, ASME V in accordance with API 6A/17D or
others?
5.5
Non metallic materials
i.e. special requirements for ceramics, non elastomerics etc.
6
Testing
6.1
Pressure testing
Per ASME VIII D2 (i.e. pressure to 90% Sy) or API 17D/6A (i.e. 1.5 x WP
with a limit of 0.83 Sy)
6.2
Pump testing
Per API 610 and API 670?
6.3
Motor testing
Per API 546
7
Technnology Maturity
Assess per API 17N?
8
Qualification
8.1
Seals
API 6A / 17D Appendix F PR-2
8.2
OEM Connections
API 6A / 17D Appendix F PR-2
8.3
Mechanical Seals
API 682?
8.4
Motor components
API 546?
8.5
Penetrators for Pump / Motor
Per manufacturers written specifcation or variant of Statoil specification?
8.6
Barrier Fluid components
Per manufacturers written specifcation?