Engineering StandardSAES-K-502 30 April, 2002Combustion Gas TurbinesRotating Equipment Standards Committee MembersAl-Odan, N.M., ChairmanAl-Hashim, I.G.Al-Hotan, K.Z.Al-Swailim, F.K.Becen!ach, ".#.Brown, $.#.Carne%, B.Graham, M.K.Kawthar Ali, M.H.&ear%, B.N'(%en, &.).Sa!ri, H.A.Salamah, M.M.Samaha, M.$.#ard, *.+.Previous Issue: 31 October, 2 !e"t P#anned $pdate: 1 !ovember, 23Revised paragrap%s are indicated in t%e rig%t marginPage 1 o& '(Primar) contact: *ounes +, Ma--i on p%one ./'0((3/1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbinesSaudi Aramco DeskTop StandardsTable of Contents1 Scope............................................................. 22 Conflicts an !e"iations................................. 23 #eferences..................................................... 3$ !esi%n............................................................ $5 &nstallation.................................................... 23' &nspection an Tests.................................... 2$Page 2 o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbinesPage 3 o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbines1 Scope1.1 This Standard defines the mandatory minimum requirements for design, manufacture and installation of gas turbine units (industrial or heavy duty and aero-derivative).This entire Standard may be attached to and made a part of purchase orders.1.2combustion gas turbine (!"T) consists of three basic components, these being a compressor, a combustor and a turbine.#n addition, the gas turbine unit includes a base frame and accessory and au$iliary systems for starting, operating, stopping, protecting and monitoring the gas turbine.%iagnostic and prognostic systems may also be included.1.& The gas turbine unit shall be of a 'anufacturer(s standard design e$cept for changes required to satisfy Saudi ramco environmental and safety requirements.The type of gas turbine shall be specified on the %ata Sheet as one of the follo)ing*- +eavy %uty or #ndustrial.- ero-%erivative.- +ybrid (aero-derivative gas generator and heavy industrial po)er turbine).The gas turbine may be of single or multiple shaft design as specified in data sheets.Page ' o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbines1., -or outdoor operation, the gas turbine shall be pac.aged in an enclosure.-or indoor operation, the gas turbine shall be either in an enclosure or free standing.The /endor shall provide on the %ata Sheet, the heat re0ection rate from the unit to the building.n overhead crane, capable of lifting the heaviest component of the gas turbine, shall be provided.Specific requirements for the building are not covered by this Standard.2 Conflicts and Deviations2.1 ny conflicts bet)een this Standard and other applicable Saudi ramco 1ngineering Standards (S1Ss), related 'aterials System Specifications (S'SSs), Standard %ra)ings (SS%s) orindustry standards, codes and forms shall be resolved in )riting by the !ompany or 2uyer 3epresentative through the 'anager, !onsulting Services %epartment, Saudi ramco, %hahran.2.2 %irect all requests to deviate from this Standard in )riting to the!ompany or 2uyer 3epresentative, )ho shall follo) internal company procedure S14-&52 and for)ard such requests to the 'anager, !onsulting Services %epartment, Saudi ramco, %hahran.3 ReferencesThe selection of material and equipment and the design, construction, maintenance and repair of equipment and facilities covered by this Standard shall comply )ith the latest edition of the references listed belo), unless other)ise noted.&.1 Saudi ramco 3eferencesSaudi ramco 1ngineering 4rocedurePage 4 o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbinesSAEP-302 Instructions for Obtaining a Waiver of a Saudi Aramco Engineering RequirementSaudi ramco 1ngineering StandardsSAES-A-004 enera! Requirements for Pressure "estingSAES-A-#0$ %oise &ontro!SAES-A-##2 'eteoro!ogica! and Seismic (esign (ataSAES-)-00* +ire,roofing for P!antsSAES-)-00- +ire Protection and Safet. Requirements for Offs/ore Production +aci!itiesSAES-)-0*0 E!ectrica! Area &!assificationSAES-1-$0$ &ombustib!e as and 2.drogen Su!fide in Air (etection S.stemsSAES-3-$0# Steam "urbinesSAES-3-$## (iese! EnginesSAES-4-00$ &oncrete +oundationsSAES-4-005 +oundations and Su,,orting Structures for 2eav. 'ac/iner.SAES-4-0#0 &ement )ased %on-S/rin6 rout for Structura! and 'ac/iner. Su,,ortSAES-4-0## E,o7. rout for Structura! and 'ac/iner. Su,,ortSaudi ramco 'aterials System SpecificationsPage ( o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbines#2-SA'SS-005 +abrication of Structura! and 'isce!!aneous Stee!30-SA'SS-00# (iese! Engines32-SA'SS-000 In!et Air +i!tration S.stems for &ombustion as "urbines32-SA'SS-00- enera! Pur,ose Steam "urbines34-SA'SS-*2$ 8ibration9 A7ia! Position9 and )earing "em,erature 'onitoring S.stemsSaudi ramco Standard %ra)ingA(-03*00* +ue! "reatment +aci!ities for &ombustionas "urbines : ".,ica! Sc/ematicSaudi ramco -orms and %ata Sheets0002-E% ; &ombustion as "urbine (ata S/eet0002-'-E%Saudi ramco #nspection 3equirements+orm #5$-320200 "urbines< Steam9 enera! Pur,ose or S,ecia! Pur,ose or 2eav. (ut. and Aero-derivative as "urbinesSaudi ramco 4roduct SpecificationA-000 (iese!&.2 #ndustry !odes and Standardsmerican 4etroleum #nstituteAPI S"( *#4 =ubrication9 S/aft Sea!ing and &ontro! Oi! S.stems for S,ecia! Pur,ose A,,!icationsPage / o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbinesAPI S"( *#* as "urbines for Refiner. Services6ational -ire 4rotection ssociation%+PA 52 %ationa! +ire A!arm &odemerican Society of 'echanical 1ngineersAS'E P"& # enera! Instructions >Performance "est &ode?AS'E P"& 22 Performance "est &ode on as "urbinesAS'E SE& 8III )oi!er and Pressure 8esse! &ode@Pressure8esse!s#nternational 7rgani8ation for Standardi8ationISO 23#4 as "urbines - Acce,tance "ests4 Design,.1 "eneral,.1.1 "as turbine units shall be supplied by /endors qualified by e$perience.To qualify, the /endor must have manufactured at least t)o turbines of identical or greater speed, firing temperature (,.1.,) and po)er rating (,.1.9 to,.1.15) for operation on fuels of similar specification.These turbines must have been in continuous service for atleast one year and must be performing satisfactorily.Page . o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbineslternatively, the /endor may satisfy this e$perience requirement based on an individual component life in comparable or more severe service conditions.1$perience need not be concentrated in a single turbine unit but may be spread through separate operating turbine components such as gas generators and po)er turbines.To qualify, ho)ever, each of the referenced turbines must have been incontinuous service for at least one year and must be performing satisfactorily.-or gas turbine models that have been in service for less than : years, the /endor must demonstrate that the lives ofcritical parts have been thoroughly analy8ed and that they satisfy all preliminary and final design criteria.The criteria and the results of critical parts analyses shall be made available to the 4urchaser for revie).,.1.2 The life requirements for ma0or components are based on the follo)ing assumptions*a. 2ase load operation (,.1.15);b. 6atural gas fuel;c. Time bet)een starts of 155 hours minimum, calculated average on a yearly basis.Page 7 o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbines-or heavy duty industrial combustion gas turbine (!"T) units, rotors, casings, bearing housings, supports, baseframe and the unit(s structure shall have a minimum e$pected life of 1:5,555 operating hours (over 25 years).4lanned time bet)een ma0or overhauls (T27) shall be a minimum of , !ivil 1ngineering %ivision, !onsulting Services %epartment.Page 1 o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbines,.1.& 7riginal equipment manufacturers (71's) and /endors )ho manufacture or pac.age turbines or engines under a license agreement )ith 71's shall have their manufacturing facilities surveyed and approved by Saudi ramco.ll /endors must have the capability of meeting Saudi ramco(s material and safety requirements./endors shall demonstrate that they have the necessary resources in place for timely production and testing, if required, of the ordered unit(s)./endor capabilities shall include but shall not be limited to the follo)ing*- 1valuation of life e$pectancies of gas turbine components operating under high ambient air temperature conditions;- 4rediction of the unit(s base load (,.1.15) based on a no-load factory test;- Sufficient design, materials, )elding and manufacturing engineering resources in place to support the plant(s manufacturing operation and to implement any changes required by the 4urchase 7rder;- -ield service engineering resources to support installation, commissioning, problem correction and performance testing;- 1$perienced engineering staff qualified to conduct improvement programs on life limiting components.Page 11 o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbines%ocumentation substantiating the /endor(s prior e$perience shall be submitted through the !ompany or 2uyer 3epresentative to be revie)ed for compliance by the!oordinator, 'echanical > !ivil 1ngineering %ivision, !onsulting Services %epartment prior to order placement. The /endor shall provide contact names of other ?sers andlocations of shipped units to enable verification of satisfactory field operation of referenced turbines./endor shall provide a list of all approved repair shops.,.1., -iring Temperature is defined as the /endor(s stated, calculated, cycle average total temperature in a ne) unit, in front of first stage turbine rotating blades )hen delivering #S7 rated po)er at #S7 conditions.The e$haust temperature for this cycle is the /endor(s stated 1$haust Temperature quoted in the literature.,.1.9 #S7 3ated 4o)er is the continuous po)er developed by a ne) gas turbine unit (flange to flange), )hile the unit is operating at sea level, at base load and at 155@ of rated speed in the follo)ing, standard operating conditions (refer to #S7 2&1,)*#nlet air temperature (total) * 19A!#nlet pressure (total) * 1.51&& bar abs (1,.:B: psia)#nlet air relative humidity * :5@1$haust pressure (static) * 1.51&& bar abs (1,.:B: psia)Page 12 o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbinesThe inlet conditions are measured at the compressor inlet flange and the e$haust conditions are measured at the turbine e$haust flange.The po)er, for mechanical drive units, is measured at the shaft output flange.Therefore, no inlet losses, e$haust losses or po)er transmission lossesare included.Chen a complete generator train is supplied, the #S7 rated po)er is defined at the generator po)er output terminals.The #S7 rated po)er is used for rating comparison )ith other turbines and should not be confused )ith site rated po)er.,.1.: Site 3ated 4o)er is defined as the continuous output (net shaft po)er) available from a gas turbine unit operating ator belo) base load (,.1.15) at site rated conditions*- 'a$imum temperature.- 'inimum atmospheric pressure (depending on elevation).- 'a$imum humidity.- Site rated speed.Since 'anufacturers rate gas turbines at #S7 conditions, the follo)ing correction factors for converting from #S7 conditions to site conditions shall apply*D1 E Site rated temperature correction factorFF.D2 E 1levation (minimum ambient pressure) factorFF.D& E 'a$imum humidity factorFF.Page 13 o& '(1ocument Responsibi#it): Rotating Equipment S2ES03042Issue 1ate: 3 2pri#, 22!e"t P#anned $pdate: 1 !ovember, 23 Combustion 5as 6urbinesD, E #nlet and e$haust losses correction factor (including inlet filters, inlet and e$haust silencers and inlet and e$haust ducts.The factor shall not be more than 5.BG for simple cycle units.#t may be less than 5.BG for co-generation or combined cycle units)FF.D9 E "earbo$ and transmission loss factor, if anyFF.D: E %eterioration and contingency factor*D: E 5.B5 for generator drive single shaft and multiple shaft units.D: E 5.B5 for mechanical drive multiple shaft units.D: E 5.