DESIGN PHILOSOPHY TABLE OF CONTENTS PAGE I. SCOPE 2 II ...

PolarisEngineeringStandard100.2Rev.: 0Page: 4 of 93. Pumps in non-critical service, such as basement sump pumps and certainchemical injection pumps are generally not spared. The Client shall verifywhich services are considered non-critical.4. In critical services the main pump shall be steam turbine driven and thespare pumps shall have motor drivers. The motor driver shall be providedwith an auto-start system. Critical services, such as lube oil, shall be asdefined by the Client.B. CompressorsAll process compressors shall be spared unless approved by Client. In general, allutility compressors except those considered non-critical to process operations byClient are to be spared. Consideration shall be given to providing the requiredcapacity in two or more machines for a particular service when:1. Loss of total compressor capacity would endanger operations, poisoncatalyst, and the like.2. Processing can continue at a reduced rate without appreciable affect onother processing facilities or without reducing the throughput of the entirerefining facility.3. The incremental cost for the multiple units over the single machine canreasonably be justified on an insurance basis or by continuation ofoperation at a reduced rate.V. SELECTION OF PUMP AND COMPRESSOR DRIVERSPumps and compressors shall generally be motor driven except where specifically statedotherwise. However, Contractor may utilize steam turbine drivers, with Clients approval,where required to achieve economic steam balance, and where reduced operating costswarrant the additional investment within the criteria established by Client for the project.VI.PROCESS DESIGN GUIDELINESThe following are selected process design guidelines that are to be used by the Contractoras indicated. These criteria represent Client’s minimum requirements, except wherestated in Project Design Specifications or Basic Engineering Design Data and are notintended to supercede Contractor’s customary design practices. Other process designcriteria will be per the Contractor’s standard practices. Contractor will identify anysignificant conflicts and bring them to Client’s attention for review and approval.Contractor shall provide Client with access to his standard practices for spot checks toensure conformance of the Contractor to these standards.A. Vessels