石油和液體石油產(chǎn)品動(dòng)態(tài)計(jì)量 第5部分：油量計(jì)算 征求意見稿

GB/T9109.5—XXXX1石油和液體石油產(chǎn)品動(dòng)態(tài)計(jì)量第5部分:油量計(jì)算本文件適用于商品石油和液體石油產(chǎn)品動(dòng)態(tài)計(jì)量的油量計(jì)算，不適用于液化石油氣與穩(wěn)定輕烴的GB/T260石油產(chǎn)品水含量的測(cè)GB/T4756石油液體GB/T21450原油和石油產(chǎn)品密度在638kg/m3～1074GB/T27867石油液體管線GB/T9109.5—XXXX2毛體積(Vg)gross計(jì)量溫度（t）temperatureofmeasurement體積溫度修正系數(shù)（Ctl）correctionfactor注1：標(biāo)準(zhǔn)溫度下的油品體積等于任一溫度下的油品體積乘以計(jì)量壓力（p）pressureofmeasurement壓縮系數(shù)（F）compressibility體積壓力修正系數(shù)（Cpl）correctionfactorfGB/T9109.5—XXXX3含水修正系數(shù)（Csw）correctionfact凈表觀質(zhì)量（mnw）netobservedmassGB/T9109.5—XXXX4根據(jù)計(jì)量交接過程協(xié)商約定或合同約定的計(jì)量時(shí)111FkPa-1Fa1KΔtThMMMMMMMF1MFi檢定/校準(zhǔn)流量計(jì)時(shí)得到的第i個(gè)流量點(diǎn)的流量計(jì)系數(shù)1 MFi+11Nt11Nt21ppeρ15ρ20ρ60Fρs油品標(biāo)準(zhǔn)密度（分別等于ρ20、ρ15、ρ60F）ρtGB/T9109.5—XXXX5檢定/校準(zhǔn)流量計(jì)時(shí)得到的第i個(gè)流量點(diǎn)的瞬時(shí)流量SW1tΘ℃Θ℃1 VCF201111 桶5.2參比條件5.3流量計(jì)示值GB/T9109.5—XXXX65.4流量計(jì)示值修正不應(yīng)采用流量計(jì)內(nèi)置的修正系數(shù)對(duì)流量計(jì)示值進(jìn)行修正，自動(dòng)計(jì)量系統(tǒng)應(yīng)在流量計(jì)算機(jī)中統(tǒng)一修5.5基礎(chǔ)數(shù)據(jù)與試樣采集手工計(jì)量型計(jì)量系統(tǒng)的計(jì)量參數(shù)與油品試樣采集方法應(yīng)符合SY/T5671的5.6流量計(jì)系數(shù)修正對(duì)于具備在線檢定/校準(zhǔn)條件的流量計(jì)，應(yīng)采用流量計(jì)系數(shù)法對(duì)流量計(jì)示值進(jìn)行修正計(jì)算；不具備在線檢定/校準(zhǔn)條件的流量計(jì)，可采用基本誤差法進(jìn)行修c）取計(jì)量周期內(nèi)多次測(cè)量結(jié)果的算術(shù)平均值作為該周6.1.2.1采用玻璃石油密度計(jì)測(cè)量油品密度時(shí)，標(biāo)準(zhǔn)密度的確認(rèn)步驟d）取計(jì)量周期內(nèi)多次測(cè)量結(jié)果的算術(shù)平均值作為6.1.2.2采用在線石油密度計(jì)或手持式數(shù)字石油密度計(jì)測(cè)量油品密度時(shí)，標(biāo)準(zhǔn)密度的確認(rèn)步驟為：含水分為體積含水與質(zhì)量含水。采用體積量交接時(shí)應(yīng)測(cè)量體積含水，采用質(zhì)量交接時(shí)可測(cè)量體積含水或質(zhì)量含水。采用蒸餾法測(cè)量油品含水時(shí)，含水的確認(rèn)步b）按照GB/T8929的規(guī)定測(cè)量油品含水并進(jìn)行數(shù)值修約；c）取計(jì)量周期內(nèi)多次測(cè)量結(jié)果的算術(shù)平均值作為該周期GB/T9109.5—XXXX7對(duì)于配備在線密度計(jì)與在線含水分析儀的自動(dòng)計(jì)量系統(tǒng)，應(yīng)定期將自動(dòng)測(cè)量結(jié)果與手工化驗(yàn)結(jié)果對(duì)于配備自動(dòng)取樣器的自動(dòng)計(jì)量系統(tǒng)，應(yīng)在每個(gè)計(jì)量周期結(jié)束后對(duì)樣品進(jìn)行化驗(yàn)，確認(rèn)油品密度流量計(jì)指示體積Vt為從t1時(shí)刻到t2時(shí)刻流量計(jì)示值之差的絕對(duì)值。對(duì)于手工油量計(jì)算，t1時(shí)刻與t2時(shí)刻分別為計(jì)量周期的開始與結(jié)束時(shí)刻；對(duì)于自動(dòng)計(jì)量系統(tǒng)，t1時(shí)刻與t2時(shí)刻分別為流量計(jì)算機(jī)計(jì)算周期t＝|Vt2－Vt1|·············或|·················································Nt1、Nt2——分別為t1與t2時(shí)刻脈沖計(jì)數(shù)器累計(jì)的流量計(jì)脈沖數(shù)，無單位；K——流量計(jì)儀表系數(shù)，1/m3。注：采用脈沖計(jì)數(shù)器的手工計(jì)量型計(jì)量系統(tǒng)通常采用流量計(jì)系數(shù)MF對(duì)流量計(jì)示值進(jìn)行修正計(jì)算，K為固定值或設(shè)定值；自動(dòng)計(jì)量系統(tǒng)采用儀表系數(shù)K對(duì)流量計(jì)示值進(jìn)行計(jì)算并修正時(shí)，K根據(jù)流量計(jì)瞬時(shí)流量與流量計(jì)檢定/校準(zhǔn)證書采流量計(jì)平均流量qv等于流量計(jì)指示體積Vt除以運(yùn)行時(shí)間Δt，運(yùn)行時(shí)間為t1時(shí)刻到tqv=························································Δt——流量計(jì)運(yùn)行時(shí)間，h。a）采用基本誤差法對(duì)流量計(jì)示值進(jìn)行修正時(shí)，流量計(jì)系數(shù)MF視GB/T9109.5—XXXX8MF=M··········································MF——流量計(jì)系數(shù)，無單位；MFi——檢定/校準(zhǔn)流量計(jì)時(shí)第i個(gè)流量點(diǎn)的流量計(jì)系數(shù)，無單位；qi——檢定/校準(zhǔn)流量計(jì)時(shí)第i個(gè)流量點(diǎn)的瞬時(shí)流量，m3/h；qi+1——檢定/校準(zhǔn)流量計(jì)時(shí)第i+1個(gè)流量點(diǎn)的瞬時(shí)流量，m3/h。度為15℃或60℉時(shí)，根據(jù)附錄A計(jì)算VCF15或VCF60F。a）如果流量計(jì)具有壓力補(bǔ)償功能，或計(jì)量壓力較低其影響量小于0.01%，則設(shè)體積壓力修正系數(shù)Cpl=··························································p——油品計(jì)量壓力（表壓），kPa；），F(xiàn)——油品壓縮系數(shù)，kPa-1。水修正系數(shù)Csw按下式計(jì)算:Csw=1－SW····································GB/T9109.5—XXXX9Vg=Vt×MF·························································(7)注：對(duì)于配備自動(dòng)取樣器的自動(dòng)計(jì)量系統(tǒng)，流量計(jì)算機(jī)通常計(jì)算每個(gè)計(jì)算周期的毛體積并進(jìn)Vgs=Vt×MF×Ctl×Cpl Vns=Vt×MF×Ctl×Cpl×Csw 計(jì)算油品質(zhì)量時(shí)Ctl等于VCF20。油品毛質(zhì)量mgm用下式計(jì)算：mgm=Vt×MF×Ctl×Cpl×ρ20 分別采用體積含水或質(zhì)量含水時(shí)，油品凈質(zhì)量mnm分別采用下式計(jì)算：mnm=Vt×MF×Ctl×Cpl×Csw×ρ20 或mnm=Vt×MF×Ctl×Cpl×ρ20×Csw 分別采用體積含水或質(zhì)量含水時(shí)，油品凈表觀質(zhì)量mnw計(jì)算如下mnw=Vt×MF×Ctl×Cpl×Csw×ρ20×Fa 或mnw=Vt×MF×Ctl×Cpl×ρ20×Csw×Fa b）采用簡化算法計(jì)算。當(dāng)存在爭議時(shí)應(yīng)采用空氣浮力修正系數(shù)計(jì)算。簡化計(jì)算如下：mnw=Vt×MF×Ctl×Cpl×Csw×(ρ20－1.1) 或mnw=Vt×MF×Ctl×Cpl×(ρ20－1.1)×Csw －mt1|····································GB/T9109.5—XXXX或|················································K——流量計(jì)儀表系數(shù)，1/kg。注：質(zhì)量流量計(jì)通常使用流量計(jì)系數(shù)MF對(duì)流量計(jì)示值進(jìn)行修正，此時(shí)K為固定值；通常不使用儀表系數(shù)K對(duì)流量計(jì)qv=·························································qv——流量計(jì)平均流量，kg/h或t/h。確定流量計(jì)系數(shù)MF的方法與體積計(jì)量流量計(jì)相同，參見7.1.1.3。采用公式(4)插值計(jì)算流量計(jì)系數(shù)如果不需要進(jìn)行含水修正則設(shè)Csw=1.0000。油品中水的質(zhì)量百分?jǐn)?shù)為SW時(shí)，質(zhì)量含水修正Csw按公mgm=mt×MF mnm=mt×MF×Csw mnw=mt×MF×Csw×Fa GB/T9109.5—XXXXVns=························································b）采用桶/t系數(shù)計(jì)算60℉體積（美桶）。根據(jù)GB/TVns=mnw×桶/t系數(shù)····················································(24)7.3.3油量計(jì)算順序應(yīng)與本文件一致，中間不修約，最后一次性修約到需要的小數(shù)位7.3.4立方米與（美）桶、千克與噸等簡單的單位換算，可在公式中直接乘以（或除以）換算系示例3：經(jīng)檢定得出某渦輪流量計(jì)儀表系數(shù)K為：100.128.1.2各計(jì)量參數(shù)的小數(shù)位數(shù)或有效數(shù)字位數(shù)要求見表2。1L桶2t3密度(ρ20、ρ15、ρ60F、ρGB/T9109.5—XXXX4kPa5℃6流量計(jì)系數(shù)（MF）7儀表系數(shù)K89壓縮系數(shù)（F）8.2.2對(duì)同一計(jì)量參數(shù)只能進(jìn)行1次修8.2.3當(dāng)保留1位小數(shù)時(shí)，數(shù)值修約示例如下（下劃線數(shù)字為擬舍棄9交接計(jì)量憑證9.1憑證格式交接計(jì)量憑證及原始記錄宜采用標(biāo)準(zhǔn)化格式。采用體積計(jì)量流量計(jì)的典型計(jì)量憑證與原始記錄格式參見附錄J與附錄K，采用質(zhì)量計(jì)量流量計(jì)可參考使用。9.2憑證要求GB/T9109.5—XXXX9.3憑證內(nèi)容b）交接站庫名稱（或地點(diǎn)）；）；）；e）計(jì)量周期（年月日時(shí)分——年月日時(shí)分）；h）標(biāo)準(zhǔn)溫度（對(duì)于體積量交接）；）；k）計(jì)量溫度；n）標(biāo)準(zhǔn)密度；v）含水修正系數(shù)；x）凈表觀質(zhì)量（對(duì)于質(zhì)量交接bb）雙方（或三方）值班人員簽章；cc）雙方（或三方）主管人員簽章；GB/T9109.5—XXXXA.1將油品體積修正到其它標(biāo)準(zhǔn)溫度VCF15-20——將油品體積從15℃修正到20℃的體積溫度修正系數(shù)；VCF60F-20——將油品體積從60℉(15.56℃)修正到20℃的體積溫度修正系數(shù)。A.1.2可根據(jù)GB/T1885查表確定VCF15-20與VCF60F-20。宜采用公式計(jì)算VCF15與VCF60F。A.2將油品密度修正到其它標(biāo)準(zhǔn)溫度A.2.1采用玻璃石油密度計(jì)測(cè)量油品密度，并根據(jù)GB/T18p——未計(jì)算玻璃溫度修正的視密度，kg/m3；ρt——計(jì)算密度計(jì)玻璃溫度膨t——實(shí)驗(yàn)溫度，℃。A.2.2在20℃、15℃或60℉下的油品密度分別用ρ20、ρ15與ρ60F表示。將油品密度從溫度t修正到15℃與ρ15=ρ20×VCF15-20···············································(A.6)ρ60F=ρ20×VCF60F-20···············································(A.7)A.3非玻璃密度計(jì)標(biāo)準(zhǔn)密度計(jì)算A.3.1使用在線石油密度計(jì)測(cè)量石油密度并且壓力對(duì)密度的影響可以忽略時(shí)，或者使用手持式數(shù)字石油密度計(jì)測(cè)量石油密度時(shí)，如需根據(jù)GB/T18GB/T9109.5—XXXXρtp——在線密度計(jì)修正后密度（在線密度），kg/m3。GB/T9109.5—XXXXF=[(ex×1000+0.5)×0.001]×10-6········································x=x1+x2+x3+x4·····································x1=-1.62080····································x2=[21.592×t+0.5×(±1.0)]×10-5·····································×10?5·········································×10?5·········································ρ15——油品15℃密度，此處為g/cm3；(±1.0)——當(dāng)t≥0時(shí)為+1.0，當(dāng)t＜0算油品壓縮系數(shù)F。2）根據(jù)本文件附錄E，848.9介于848.03）將油品15℃密度除以1000換算到g/cm3，得ρ15x1=-1.62080x2=[21.592×37.7+0.5×(1.0)]×10-5=0.00815x3=[87096.0/0.8482+0.5×(1.0)]×10-5=1.21117x4=[420.92×37.7/0.8482+0.5×(1.0)]×10-5=0.22068x=-0.1808F=[(e-0.1808×1000+0.5)×0.001]×10-6=0.835×10-6(kPa-1)GB/T9109.5—XXXX-6kPa-1℃℃GB/T9109.5—XXXX修正系數(shù)，F(xiàn)aGB/T9109.5—XXXX (℃)數(shù)數(shù)值度)2流量計(jì)系數(shù)MFvvGB/T9109.5—XXXX1）計(jì)算指示體積Vt根據(jù)流量計(jì)原始記錄，流量計(jì)示值Vt1=57709m3，Vt2=61889m3，因此根據(jù)公式(1)，該計(jì)量周期的t－Vt1|=61889m3－57709m3=41802）計(jì)算平均流量qvm3/h=522.5m3/h≈522m3/h3）確定流量計(jì)系數(shù)MF4）確定油品體積溫度修正系數(shù)CtlGB/T9109.5—XXXX正系數(shù)表》，對(duì)溫度進(jìn)行插值計(jì)算得VCF60F-20=1首先根據(jù)油品標(biāo)準(zhǔn)密度查GB/T1885表E1《原油20℃密度到15℃密度換算表》確定15℃密度。下表20℃密度ρ20（kg/m3）采用內(nèi)插法計(jì)算15℃密度。由于ρ20=845.3kg/m3，介于845.0和846.0之間，參照公式(4)流量計(jì)系數(shù)Csw=1－SW=1－0.162%=0.99838≈0.9984a）對(duì)于標(biāo)準(zhǔn)溫度為20℃的體積量交接，Ctl=VCF20。根據(jù)公式(7)，分別采用基本誤差法、流量計(jì)系數(shù)法（區(qū)間法）與流量計(jì)系數(shù)法（內(nèi)插法）對(duì)流量計(jì)示值進(jìn)行修正，計(jì)算凈標(biāo)準(zhǔn)體積Vns得：GB/T9109.5—XXXX等于6.2898（美）桶。分別采用基本誤差法、流量計(jì)系數(shù)法（區(qū)間法）與流量計(jì)系數(shù)法（內(nèi)插Vns=V1560F=4180×1.0000×0.9873×1Vns=V1560F=4180×1.0005×0.9873×Vns=V1560F=4180×1.0003×0.9873×mnw=4180×1.0000×0.9911×1.0003×0.998mnw=4180×1.0005×0.9911×1.0003×0.998mnw=4180×1.0003×0.9911×1.0003×0.998始數(shù)據(jù)、化驗(yàn)原始數(shù)據(jù)與流量計(jì)系數(shù)表分別見表E.7、E.8與E.9。該分輸(℃)數(shù)數(shù)值度)GB/T9109.5—XXXX0000流量計(jì)系數(shù)MFvvv根據(jù)流量計(jì)原始記錄，流量計(jì)示值mt1=120452kgmt=|mt2-mt1|=(902）計(jì)算平均流量qv3）確定流量計(jì)系數(shù)MFCsw=1－0%=1.0000mnw=784.439×1.0011×1.00GB/T9109.5—XXXX品20℃密度到15℃密度換算表》，插值計(jì)算得ρ1Vns=V60F=mnw×桶/t系數(shù)=784.124t×8.GB/T9109.5—XXXXGB/T9109.5—XXXXGB/T9109.5—XXXX表G.1石油及液體石油產(chǎn)品20℃密度GB/T9109.5—XXXXGB/T9109.5—XXXX 123t℃4pkPa5pekPa6ρ207SW%8Fa——9MF————FkPa-1————ttGB/T9109.5—XXXXK.3為便于長輸管道的油量計(jì)算，可將前一天結(jié)束時(shí)的流量計(jì)示值（表底數(shù)）記GB/T9109.5—XXXX表K.1XXXXXX公司流量計(jì)原始站庫名稱：XXXXXXXX20XX年XX月XX日1#流量計(jì)2#流量計(jì)3#流量計(jì)4#流量計(jì)5#流量計(jì)班次時(shí)間表底數(shù)(m)溫度(℃)壓力(kPa)表底數(shù)(m)溫度(℃)壓力(kPa)表底數(shù)(m)溫度(℃)壓力(kPa)表底數(shù)(m)溫度(℃)壓力(kPa)表底數(shù)(m)溫度(℃)壓力(kPa)值班人員讀數(shù)修正值讀數(shù)修正值讀數(shù)修正值讀數(shù)修正值讀數(shù)修正值8~16時(shí)10:0012:0014:0016:00平均值平均值平均值平均值平均值16~0時(shí)18:0020:0022:000:00平均值平均值平均值平均值平均值0~8時(shí)2:004:006:008:00平均值平均值平均值平均值平均值注：流量計(jì)示值（表底數(shù)）宜8h記錄一次。GB/T9109.5—XXXX站庫名稱：XXXXXXXX