250 • STANDARD LUBRICATING OIL SYSTEM FOR GEARED TURBINES. 



7. Oils having a minimum viscosity of 500 seconds (Saybolt) at 100° F. have 

 been substituted for the previous ones. This decision was reached as a result of 

 our experience to date and by agreement with the Division of Operations. 



8. Thermometer fittings have been changed from S. E. print B-58 to B-56 

 which shows a shorter separable socket. 



9. Various changes of greater or less importance have been made through- 

 out, and it is suggested that the various documents be compared with those previ- 

 ously issued, with the end in view of incorporating all of the changes in future in- 

 stallations. 



C. Application of Present Order. — i. Plan E-i 1000-10 shows an arrangement 

 of the lubricating oil system for geared turbine units up to and including 3,000 

 shaft horse-power, and while the plan is purely diagrammatic, there is no doubt but 

 that it can be readily adapted to any of the various types of turbine-driven ships. 



2. For vessels in an advanced stage of construction, the change from the sys- 

 tem called for in the original Technical Order No. 75, to the arrangement specified 

 in the foregoing, is to be carried into effect only where it will not seriously delay 

 the completion of the vessels, or where it can be effected at a reasonable cost. If 

 serious delay or excessive cost is anticipated, the matter shall be referred to the 

 Home Office before final action is taken. 



3. Where piping, manifolds, fittings and other material is already available or 

 provided for, it shall be utilized and rearranged to conform as closely as possible to 

 the above requirements, in order to minimize cost and avoid waste and scrapping 

 of material. 



4. Where the conditions stated in paragraph 2 do not obtain, the revised re- 

 quirements should be made effective on receipt. 



D. Adjustment of Changes in Cost.-. — i. Where any of the equipment herein 

 specified' is not required by the contract specifications, or by subsequent agreements, 

 it will be furnished and installed as a change under the contract, and the matter 

 of cost shall be dealt with in the usual manner. 



2. As, however, the departures from the original system consist mainly in 

 omissions and simplifications, a substantial decrease in cost is anticipated. 



3. On vessels in which the change to the present requirements can be effected, 

 and for which the cost has already been adjusted on the basis of the original sys- 

 tem, the matter of decreased cost shall be handled in the usual manner. 



E. Agreement with Division of Operations. — The revised system specified 

 herein conforms with the views of the Division of Operations, Department of Con- 

 struction and Repair. 



F. Approval of Drawings. — General arrangement and detail drawings of oiling 

 system must be submitted, with district manager's comments, to the Engineering 

 Section before final approval. 



(Signed) P. J. McAuliffe, 

 Manager, Ship Construction Division. 

 Documents (5). 



