壓力管道強(qiáng)度計(jì)算書(shū)

1、強(qiáng)度計(jì)算書(shū)工程名稱(chēng)：XXXXXXXXXX項(xiàng)目號(hào)：XXXX版次：0設(shè)計(jì)單位：XXXXXXXXXX項(xiàng)目負(fù)責(zé)：設(shè)計(jì)：校核：審核:工業(yè)及熱力管道壁厚計(jì)算書(shū)1直管壁厚校核1.1計(jì)算公式：根據(jù)工業(yè)金屬管道設(shè)計(jì)規(guī)范（GB50316-2000）（2008年版）6.2中規(guī)定，當(dāng)直管計(jì)算厚度ts小于管子外徑Do的1/6時(shí)，承受內(nèi)壓直管的計(jì)算厚度不應(yīng)小于式（1）計(jì)算的值。設(shè)計(jì)厚度tsd應(yīng)按式（2）計(jì)算。(1)(2)(3)MPa);t_PDos2上tEjPYtsd=tsCC=C1C2式中ts一直管計(jì)算厚度（mm）；P設(shè)計(jì)壓力（MPa）；D。一管子外徑（mm）;b7一在設(shè)計(jì)溫度下材料的許用應(yīng)力Ej一焊接接頭系數(shù)；tsd

2、一直管設(shè)計(jì)厚度（mm）;C厚度附加量之和（mm）;Ci厚度減薄附加量（mm）C2腐蝕或腐蝕附加量（mm）Y一計(jì)算系數(shù)式中設(shè)計(jì)溫度為常溫，一般取100C,k根據(jù)工業(yè)金屬管道設(shè)計(jì)規(guī)范(GB50316-2000)(2008年版)附錄A金屬管道材料的許用應(yīng)力表A.0.1進(jìn)行選取，故20#為130MPa,S30408為137MPa。Ej取值是根據(jù)壓力管道規(guī)范-工業(yè)管道第2部分：材料(GB/T20801.2-2006)表A.3,故20#和S30408的取值都為1。Y根據(jù)工業(yè)金屬管道設(shè)計(jì)規(guī)范(GB50316-2000)(2008年版)表6.2.1進(jìn)行選取，故20#和S30408的取值者B為0.4。1.2管道

3、計(jì)算厚度壓力管道壁厚強(qiáng)度校核管道號(hào)設(shè)計(jì)壓力鋼管外徑管道材質(zhì)許用應(yīng)力(100C情況下)焊接接頭系數(shù)計(jì)算系數(shù)計(jì)算厚度P(MPa)Do(mm)bt(MPa)EjYts(mm)PG09010.7025920#13010.40.70PG09020.7021920#13010.40.59PG09030.7013320#13010.40.36PG09040.708920#13010.40.24PG09070.707620#13010.40.20PG09080.7015920#13010.40.43PG09090.7013320#13010.40.36PG09100.7015920#13010.40.43PG

4、09120.705720#13010.40.15PG09150.708920#13010.40.24PG09160.708920#13010.40.24PG09170.7015920#13010.40.43PG09180.7015920#13010.40.43PL06050.40273S3040813710.40.40PL06060.40273S3040813710.40.40PL06100.40273S3040813710.40.40PL06110.40273S3040813710.40.40PL06150.40108S3040813710.40.16PL06160.40273S304081

5、3710.40.40PL06190.40108S3040813710.40.16PL06200.40108S3040813710.40.16PL06250.28108S3040813710.40.11PL06260.40108S3040813710.40.16PL06270.80108S3040813710.40.31PL06280.8076S3040813710.40.22PL06330.80108S3040813710.40.31N08010.505720#13010.40.11VT01010.7027320#13010.40.73VT01020.7042620#13010.41.14VT

6、01030.705720#13010.40.15VT01060.7027320#13010.40.73VT01070.7015920#13010.40.43LS01010.7010820#13010.40.25LS01030.705720#13010.40.13LS01250.705720#13010.40.13MS07021.388920#13010.40.43MS07031.388920#13010.40.43MS07041.388920#13010.40.43MS07051.3821920#13010.41.05MS07061.388920#13010.40.43MS07071.3876

7、20#13010.40.361.3厚度附加量（1） .Ci厚度減薄附加量（mm）,取鋼管允許厚度負(fù)偏差。根據(jù)流體輸送用不銹鋼無(wú)縫鋼管（GB/T14976-2012）規(guī)定：熱軋（擠、擴(kuò)）鋼管壁厚15mm時(shí)，普通級(jí)允許厚度負(fù)偏差（12.5%顏高級(jí)允許厚度負(fù)偏差（12.5%5；熱軋（擠、擴(kuò)）鋼管壁厚n15mm時(shí)，普通級(jí)允許厚度負(fù)偏差（15%顏高級(jí)允許厚度負(fù)偏差（12.5%5；冷拔（軋）鋼管壁厚w3mm時(shí)，普通級(jí)允許厚度負(fù)偏差（14%$高級(jí)允許厚度負(fù)偏差（10%5；冷拔（軋）鋼管壁厚3mm時(shí)，普通級(jí)允許厚度負(fù)偏差（10%$高級(jí)允許厚度負(fù)偏差（10%。根據(jù)輸送流體用無(wú)縫鋼管（GB/T8163-2008）

8、規(guī)定：熱軋（擠壓、擴(kuò)）鋼管外徑w102mm時(shí)，允許厚度負(fù)偏差（12.5%S或0.40中較大值）；熱軋（擠壓）鋼管外徑102mm時(shí)，當(dāng)壁厚和外徑的比值W0.05時(shí)，允許厚度負(fù)偏差（15%S或0.40中較大值）0.050.10時(shí)，允許厚度負(fù)偏差（12.5%S或0.40中較大值）0.10時(shí)，允許厚度負(fù)偏差（10%5）;冷拔（軋）鋼管壁厚w3mm時(shí)，允許厚度負(fù)偏差（10%S或0.15中較大值）；冷拔（軋）鋼管壁厚3mm時(shí)，允許厚度負(fù)偏差（10%綜上所述，考慮到LNG用鋼管基本上為冷拔（軋）鋼管，故厚度負(fù)偏差應(yīng)按照上面規(guī)定根據(jù)鋼管材質(zhì)選擇。（2） .C2腐蝕附加量（mm）,20#鋼管的腐蝕裕量參照鋼制對(duì)

9、焊管件規(guī)范（SY/T0510-2010）取1.5mm,S30408鋼管的腐蝕附加量一般為0mm。1.4常用管道的設(shè)計(jì)厚度管子壁厚表公稱(chēng)直徑DNmm管子外徑O.D.mmL1B,M1BN1BL1E,M1E管表號(hào)/壁厚SCH./THK管道材料PIPEMATERIALS管表號(hào)/壁厚SCH./THK管道材料PIPEMATERIALS1518320#C.S2.5S304082025320#C.S2.5S304082532320#C.S2.5S30408(32)38320#C.S2.5S3040840453.520#C.S2.5S3040850573.520#C.S3S30408(65)76420#C.S3

10、S304088089420#C.S3S30408100108420#C.S3S30408(125)133420#C.S3.5S304081501594.520#C.S3.5S30408200219520#C.S4S30408250273.0620#C.S4.5S30408300325720#C.S5S30408350377720#C.S6S30408400426820#C.S6S30408鋼管的公稱(chēng)壁厚大于設(shè)計(jì)壁厚，故所選鋼管的壁厚符合要求2彎管壁厚校核2.1計(jì)算公式根據(jù)壓力管道規(guī)范-工業(yè)管道第3部分：設(shè)計(jì)和計(jì)算（GB/T20801.3-2006）6.2規(guī)定：PDo內(nèi)壓彎管的計(jì)算厚度（位于52

11、處，最危險(xiǎn)處）應(yīng)按式（4）計(jì)算：(4)當(dāng)計(jì)算彎管的內(nèi)側(cè)厚度時(shí)：(5)4RDo-1I二4RDo-2當(dāng)計(jì)算彎管的外側(cè)厚度時(shí)：(6)4RDo1I二4RDo2式中tw一彎管（內(nèi)、外側(cè)）的計(jì)算厚度（mm）;0f一彎管的轉(zhuǎn)角（度）；I一計(jì)算系數(shù)；r一彎管在管子中心線處的彎曲半徑（mm）;2.2 彎曲半徑根據(jù)工業(yè)金屬管道工程施工規(guī)范（GB50235-2010）中規(guī)定:高壓鋼管的彎曲半徑大于管子外徑的5倍，其他管子的彎曲半徑宜大于管子外徑的3.5倍。對(duì)于一些在工廠內(nèi)加工的彎管，最小可以使R=1.5D。,而在一般情況下RA3Do,故在計(jì)算中選用R=1.5Do和R=3Do兩種情況，因?yàn)橹灰@兩種情況下的設(shè)計(jì)壁厚可

12、以符合要求，其他情況下的設(shè)計(jì)壁厚就都是符合要求的。2.3 常用彎管的設(shè)計(jì)厚度壓力彎管壁厚強(qiáng)度校核焊管線號(hào)設(shè)計(jì)壓力鋼管外徑公稱(chēng)壁厚管道材質(zhì)許用應(yīng)力（100C情況下）接接頭系計(jì)算系數(shù)（R=1.5Do內(nèi)側(cè)）計(jì)算系數(shù)（R=1.5Do外側(cè)）計(jì)算系數(shù)計(jì)算厚度（R=1.5Do內(nèi)側(cè)）計(jì)算厚度（R=1.5Do外側(cè)）厚度負(fù)偏差腐蝕裕量設(shè)計(jì)厚度（R=1.5Do內(nèi)側(cè)）設(shè)計(jì)厚度（R=1.5Do外側(cè)）數(shù)P(MPa)Do(mm)S(mm),t(MPa)EjIIYts(mm)ts(mm)C1(mm)C2(mm)tsd(mm)tsd(mm)PG09010.7259620#13011.250.8750.40.870.610.60

13、1.502.972.71PG09020.7219520#13011.250.8750.40.740.510.501.502.742.51PG09030.7133420#13011.250.8750.40.450.310.401.502.352.21PG09040.789420#13011.250.8750.40.300.210.401.502.202.11PG09070.776420#13011.250.8750.40.260.180.401.502.162.08PG09080.71594.520#13011.250.8750.40.530.370.451.502.482.32PG09090.

14、7133420#13011.250.8750.40.450.310.401.502.352.21PG09100.71594.520#13011.250.8750.40.530.370.451.502.482.32PG09120.7573.520#13011.250.8750.40.190.130.351.502.041.98PG09150.789420#13011.250.8750.40.300.210.401.502.202.11PG09160.789420#13011.250.8750.40.300.210.401.502.202.11PG09170.71594.520#13011.250

15、.8750.40.530.370.451.502.482.32PG09180.71594.520#13011.250.8750.40.530.370.451.502.482.32PL06050.42736S3040813011.250.8750.40.520.370.601.502.622.47PL06060.42736S3040813011.250.8750.40.520.370.601.502.622.47PL06100.42736S3040813011.250.8750.40.520.370.601.502.622.47PL06110.42736S3040813011.250.8750.

16、40.520.370.601.502.622.47PL06150.41084S3040813011.250.8750.40.210.150.401.502.112.05PL06160.42736S3040813011.250.8750.40.520.370.601.502.622.47PL06190.41084S3040813011.250.8750.40.210.150.401.502.112.05PL06200.41084S3040813011.250.8750.40.210.150.401.502.112.05PL06250.281084S3040813011.250.8750.40.1

17、50.100.401.502.052.00PL06260.41084S3040813011.250.8750.40.210.150.401.502.112.05PL06270.81084S3040813011.250.8750.40.410.290.401.502.312.19PL06280.8764S3040813011.250.8750.40.290.200.401.502.192.10PL06330.81084S3040813011.250.8750.40.410.290.401.502.312.19NG01010.5573.520#13011.250.8750.40.140.100.3

18、51.501.991.95SW06020.23108420#13011.250.8750.40.120.080.401.502.021.98SW06030.23108420#13011.250.8750.40.120.080.401.502.021.98SW0605276420#13011.250.8750.40.730.510.401.502.632.41SW0606276420#13011.250.8750.40.730.510.401.502.632.41SW0607289420#13011.250.8750.40.850.600.401.502.752.50SW06111.489420#13011.250.8750.40.600.420.401.502.502.32VT01010.7273620#13011.250.8750.40.920.640.601.503.022.74VT01020.7426820#13011.250.8750.41.431.000.801.503.733.30VT01030.7573.520#13011.250.8750.40.190.130.351.502.041.98VT01060.7273620#13011.