GE Energy

The GE Parts Advantage:A behind-the-scenes look atGE part creation

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Why buy a part manufactured by GE?

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Only GE meets the complete specifications of a GE part number

�Part design process includes research, model construction, testing

�Manufacturing process integrates design, materials, processes and

methods

�Collateral effects of the part are quantified (performance, cooling,

stresses, impact on adjacent parts)

�Extensive documentation structure supports entire process

�Manufactured to meet design intent

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Creating a GE part is a rigorous process…

Notes & Instructions

Material Specifications

Process Specifications

Drawings

…leveraging our technology leadership and engineering expertise

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Example: Frame 7 Stage 1 Bucket Kit or Arrangement

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7EA Stage 1 Bucket Kit or Arrangement

Drawing - Bucket Kit or Arrangement

92 Buckets plus Hardware

Drawing - Bucket Machining

Drawing - Bucket Casting

Drawing - Bucket Cooling

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Process Specs•Coating - 2 coatings (internal and external) •Heat Treatments – Definition heat treatments, Temp. and time req’ts, etc. •Airflow Testing – Definition of test equipment, calibration, and leak checks•Machining of Super Alloy – Req. for grinding/ turning/ milling/ cutting/etc. •Acceptance Requirements – Gen. req’ts; Specific inspection methods, etc. •Casting Process – Qualification req’ts, production processing req’ts; etc. •Complimentary Document for Dovetail Drawing – Contour and tolerance; etc.

Notes•Machining Datum – Primary, secondary, and tertiary specific locations•Coating Procedure - Define sequence for different coatings, etc.•Surface Finish - Requirement of surface smoothness •Part Marking - Identification of required data marked on bucket; etc.•Water/ Air Flow Acceptance Criteria - Water flow check individual holes •Dovetail Coating Blending and Overspray •Dimensions - Radial/Axial Features – machining dimensions, tolerances

Drawing - Bucket Machining

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Drawing - Bucket Cooling

Process Specs

•Airflow Testing – Each bucket tested for cooling hole flows. - Definition of test equip., calibration, and leak checks, etc.

• Machining of Super Alloy – Requirements for grinding/ turning/ milling/ cutting/etc.- Requirements for inspection and non-destructive testing;- Quality assurance requirements.

•Cooling hole manufacturing – Drilling parameters; electrolyte quality; arching limits; etc.

Notes

•Surface Finish – Requirement of surface smoothness

•Part Marking – Identification of required data marked on bucket; etc.

•Air Flow Acceptance Criteria – For each hole– air flow individual and sets of holes

•Dimensions for hole features – Definition of center; diameters; relative true position;- Radial dimensions of turbulated features.

•Dimensions for wall thickness – Requirements for wall between airfoil exterior and hole surfaces; etc.

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Drawing - Bucket Casting

Material Specification Document

•Reference GE material specification – Chemistry composition; material properties; test material req’ts; etc.

Process Specs

•Casting Process – Qualification, production, inspection & test req’ts•Dimensional Data Collection Process – Responsibilities; process capability analysis;- Documentation; record retention.•Acceptance Requirements – General Req’ts; Specific inspection methods, features, etc.•Complimentary Document for Airfoil Shape Definition – Airfoil and shank coordinate definition; inspection planes- Contour tolerances

Notes

•Initial & Final Casting Datum - Primary, secondary, and tertiary specific locations •Airfoil Inspection – Contour and relative displacement inspections between airfoil sections.•Internal Cavity & Shank Requirements – Dimension, contour definitions for cavity & shank external surface•Surface finish – Requirement of surface smoothness for various locations on the bucket•Prohibiting Some Casting Techniques – Industry processes or techniques from being used in manufacturing •Dimensional Process Capability Collection & Reporting - Vendor responsibilities; process capability analysis; documentation•Part Marking – Identification of required data marked on bucket; etc.•Dimensions for Airfoil Internal & External Features – Airfoil dimensions and tolerances; definition of surface contours.•Dimensions for Platform & Shank features - Dimensions and tolerances; definition of compound radii.

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Investing in a GE part gives you the benefit of our

detailed design and manufacturing process

GE is the Only Parts Supplier

Meeting Complete Drawing

Compliance

Top Level Arrangement Drawing – 92 Buckets + Hardware

• Bucket Machining Drawing

— Process Specifications for Heat Treatments, etc.

— Notes with Dimensions/Instructions/Procedures

— Acceptance Criteria

• Bucket Cooling Drawing

— Process Specifications for Airflow Testing, etc.

— Notes with Dimensions/Instructions/Procedures

— Acceptance Criteria

• Bucket Casting Drawing

— Material Specifications

— Process Specifications with Qualification Requirements

— Notes with Dimensions/Instructions/Procedures