CAT Titan 250 - Manual (Page 63)

Turbomachinery Package Specification Titan 250 Generator Set
15.1.7 Certification
Certification is typically required to demonstrate offshore turbomachinery compliance with
applicable rules for a fixed or mobile offshore installation. Solar can provide the
necessary certification or assist the customer in obtaining certification. Involvement of
one of the following certifying authorities is usually required:
• Det Norske Veritas (DNV)
• Bureau Veritas (BV)
• Lloyd’s Register (LR)
• American Bureau of Shipping (ABS)
15.1.8 Deck Deflection Limits
The package supporting deck structure must have sufficient stiffness to maintain
alignment of the turbine and driven equipment under dynamic vessel motion. Table 13,
lists the maximum allowable deflections measured between the furthest mounting points.
With analysis, these limits may be extended through the use of gimbals or AVMs.
15.1.9 Angular Displacement and Acceleration
Table 15, Marinization Specifications, lists the maximum allowable angular displacement
and acceleration limits for marine applications. The Basic Duty category is met by the
standard package without any additional modification. Moderate Duty and Severe Duty
categories require modification.
15.1.10 Main and Auxiliary Service
The information provided in this section does not apply to equipment used in “Main and
Auxiliary Service”. If equipment is intended for this type of service, please contact Solar
Turbines Incorporated for guidance to ensure the correct application and certification
requirements are met.
Table 13. Marinization Specifications
Supporting Deck Deflection Limits
Hogging and Sagging 0.3833 mm/m (0.0046 in/ft)
Deck Twist 0.0198°/m (0.006°/ft)
Angular Displacement and Acceleration Limits
Severe Duty
Basic Duty
Moderate
Duty Parallel Perpendicular
Maximum Permissible Angular Displacements
Pitch / Period 2° / 13 sec 7.5° / 9 sec 10° / 9 sec 7.5° / 9 sec
Dynamic:
Roll / Period 2° / 13 sec 7.5° / 13 sec 22.5° / 13 sec 10° / 13 sec
Trim 2° 5° 5° 5°
Static:
List 2° 5° 15° 5°
Maximum Permissible Accelerations
Operating: ± 0.1 g ± 0.5 g ± 1.0 g ± 1.0 g
Survival: ± 0.5 g ± 1.0 g ± 1.5 g ± 1.5 g
© 2008 Solar Turbines Incorporated. All rights reserved. TPS250GS/908 - Preliminary
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