1、2021年最新公稱壓力MPat道壁厚對(duì)照表一無(wú)縫碳鋼管壁厚？?？?mm材料PNMPaDN101520253240506580100125150200250300350400450500600<1.62.533333.53.544444.5567788892.52.533323.53.544444.5567788910204.02.533333.53.5444.555.5789101112131512CrMo6.43333.53.53.544.5567891112141617192215CrMo12Cr1MoV10.033.53.544.54.55678910131518202216.04

2、4.55566789111315192426303420.044.556678911131518222832364.0T3.5444.5555.5<1.62.533333.53.544.5444.55.577888892.52.533333.53.544.5454.55.57789910124.02.533333.53.544.555.568910111214151810Cr5Mo6.43333.5444.555.5789111314161820222610.033.5444.555.57891012151822242616.044.555678910121518222832364020

3、.044.55678911121518222634384.0T3.5444.5555.516Mn<1.62.52.52.533333.53.53.53.544.555.56666715MnV2.52.52.52.533333.53.53.53.544.555.5677894.02.52.52.533333.53.544.55678891011126.42.53333.53.53.544.55678911121314161810.0333.53.5444.556789111315171916.03.53.544.55567891112161922252820.03.544.555.5678

4、911131519242630J1二無(wú)縫不銹鋼管壁厚？?？?mm材料PNMPaDN1015202532405065801001251502002503003504004505006001Cr18Ni9Ti含Mo不銹鋼<1.02222.52.52.52.52.52.5333.53.53.5444.51.622.52.52.52.52.5333333.53.544.5552.522.52.52.52.52.53333.53.544.556674.022.52.52.52.52.5333.544.556789106.42.52.52.53333.544.55678101113144.0T33.

5、53.54444.5三焊接鋼管壁厚？?？?mm材料PNMPaDN20025030035040045050060070080090010001100120014001600焊接碳鋼管Q235A2.0.2555555556666667770.6556666677778889101.055666778899101111121.66677889101112131415162.57899101112131516焊接不銹鋼管0.2533333.53.53.54444.54.50.6333.53.53.5444.555661.03.53.544.54.555.567781.644.55667789102.5

6、56789910121315內(nèi)壓金屬直管的壁厚根據(jù)SH3059-2001?石油化工管道設(shè)計(jì)器材選用通那么?確定:當(dāng)S0<Do/6時(shí),直管的計(jì)算壁厚為：S0=PD0/(2(Tt+2PY)直管的選用壁厚為：S=S0+C式中S0直管的計(jì)算壁厚,mm;P-設(shè)計(jì)壓力,MPa;D0直管外徑,mm(rt設(shè)計(jì)溫度下直管材料的許用應(yīng)力,MPa;一一焊縫系數(shù),對(duì)無(wú)縫鋼管,=1;S-包括附加裕量在內(nèi)的直管壁厚,mm直管壁厚的附加裕量,mmY溫度修正系數(shù),按下表選取.溫度修整系數(shù)表鋼管壁厚表示方法有管子表號(hào)、鋼管壁厚尺寸和管子重量三種方法1是以管子表號(hào)"Sch表示壁厚.管子表號(hào)是管子設(shè)計(jì)壓力與設(shè)計(jì)溫度

7、下材料許用應(yīng)力的比值乘1000,并經(jīng)圓整后的數(shù)值.即：Sch=P/rtX1000ANSIB36.10壁厚等級(jí)：Sch10、Sch2RSch30、Sch4RSch6RSch80、Sch10RSch120Sch140Sch160十個(gè)等級(jí);ANSIB36.19壁厚等級(jí)：Sch5&Sch103Sch40sS2以鋼管壁厚尺寸表示？?中國(guó)、ISO、日本局部鋼管標(biāo)準(zhǔn)采用ch80s四個(gè)等級(jí)；表示英制管壁厚系列：Sch.20-全稱：Schedule20Sch.10s-幫s的系列為不銹鋼專用,碳鋼不用.舉個(gè)例子：2"sch.10s表示2接管的壁厚為2.9mm,材質(zhì)為不銹鋼；2"sch.

8、40表示2接管的壁厚為4.0mm.3是以管子重量表示管壁厚度,它將管子壁厚分為三種：a.標(biāo)準(zhǔn)重量管,以STD表示b加厚管,以XS表示c.特厚管,以XXS表示.對(duì)于DNC250mm的管子,Sch40相當(dāng)于STD,DN<200mm的管子,Sch80相當(dāng)于XS.鋼管壁厚的分級(jí),在不同標(biāo)準(zhǔn)中所表示的方法也各不相同.ANSIB36.10和JIS標(biāo)準(zhǔn)中的管子表號(hào)為；Schl0、20、30、40、60、80、100、120、140、160.ANSIB36.19中的不銹鋼管管子表號(hào)為：5S、10S、40S、80S.管表號(hào)(Sch.)并不是壁厚,是壁厚系列.實(shí)際的壁厚,同一管徑,在不同的管子表號(hào)中其厚度各

9、異.不同管子表號(hào)的管壁厚度,在美國(guó)和日本是應(yīng)用計(jì)算承受內(nèi)壓薄壁管厚度的Barlow公式計(jì)算并考慮了腐蝕裕量和螺紋深度及壁厚負(fù)偏差-12.5%之后確定的,如公式(1-2-2)和(1-2-3)所示.tB=D0P/20(1-2-2)t=D0/2(1-0.125)XP/t+2.54(1-2-3)式中tBt分別表示理論和計(jì)算壁厚,mmD0管外徑,mmP設(shè)計(jì)壓力,MPa址一一在設(shè)計(jì)溫度下材料的許用壓力,MPa計(jì)算壁厚徑圓整后才是實(shí)際的壁厚.如果鋼管的管子表號(hào),可根據(jù)式(1-2-1)計(jì)算出該鋼管所能適應(yīng)的設(shè)計(jì)壓力,即P=Sch./</1000(1-2-4)例如,庫(kù)存Sch40,碳素鋼20無(wú)縫鋼管,當(dāng)設(shè)

10、計(jì)溫度為3500c時(shí)給鋼管所能適應(yīng)設(shè)計(jì)壓力為：P=40X92/100O=3.68MPa中國(guó)石化總公司標(biāo)準(zhǔn)SHJ405規(guī)定了無(wú)縫鋼管的壁厚系列并Sch.5s,Sch.10,Sch.10s,Sch.20,Sch.20s,Sch.30,Sch.40,Sch.40s,Sch.60,Sch.80,Sch.100,Sch.120,Sch.140,Sch0160,如表1-2-9所示.2.以管子重量表示管壁厚度的壁厚系列美國(guó)MSS和ANSI規(guī)定的以管子重量表示壁厚方法,將管子壁厚分為；種：(1)標(biāo)準(zhǔn)重量管以STD表示;(2)加厚管以XS表示;(3)特厚管以XXS表示.<DN250mm的管子,Sch40相

11、當(dāng)于STD管.<DN200mm的管子,Sch80相當(dāng)于XS管.常用鋼材的化學(xué)成分和機(jī)械性能鋼材類別序號(hào)鋼號(hào)標(biāo)準(zhǔn)號(hào)化學(xué)成分碳C鎰Mn硅Si銘Cr銀Ni鋁Mo帆V鈦Ti1A3YB175-632A3RYB536-690.220.400.650.120.30310MnRYB536-690.201.201.600.200.600.040.12415MnVRYB536-690.181.201.600.200.600.040.10鋼509Mn2VRYB536-690.121.401.800.200.50板620gGB713-720.160.240.350.650.150.305(C%-0.02)0.8

12、0722gGB713-720.190.260.700.900.170.3780Cr18Ni9TiYB542-700.082.001.0017.019.08.010.591Cr18Ni9TiYB542-700.1212.001.0017.019.08.010.50.300.801000Cr19Ni10YB542-700.032.001.0018.08.018.020.012.025.0110Cr17Ni13Mo2TiYB542-700.082.000.8016.018.012.014.02.03.01200Cr17Ni14Mo2YB542-700.032.001.0016.018.012.016

13、.013A3YB231-70鋼1410YB231-700.070.140.350.650.170.370.150.25管1520YB231-700.170.240.350.650.170.350.250.251616MnYB231-700.120.201.201.600.200.60鋼化學(xué)成分機(jī)械性能不小于材類序號(hào)鋼號(hào)標(biāo)準(zhǔn)號(hào)其它硫S磷P抗拉強(qiáng)度ob屈服點(diǎn)6S延伸率Ss沖擊值ab備注別不大于kg/kg/%kgm/1A3YB175-6338472426S4202A3RYB536-690.0450.0403838242326267.06.5616S1726鋼310MnRYB536-690.0450.

14、0405250353321206.30616S1726板415MnVRYB536-690.0450.0405452403818176.0616S1726509Mn2VRYB536-690.0400.0405035213.5(70C)S520620gGB713-720.0450.0404141252426256.0616S1725722gGB713-720.0450.0404327246.0S66080Cr18Ni9TiYB542-700.0200.035553891Cr18Ni9TiYB542-700.0200.03555381000Cr19Ni10YB542-700.0200.0355040

15、110Cr17Ni13Mo2TiYB542-700.0200.03550451200Cr17Ni14Mo2YB542-700.0200.0355045鋼管13A3YB231-700.0550.0453824221410YB231-700.0400.0353421241520YB231-700.0500.0404025201616MnYB231-700.0500.050523521鋼材類別序號(hào)鋼號(hào)標(biāo)準(zhǔn)號(hào)化學(xué)成分碳C鎰Mn硅Si銘Cr銀Ni鋁Mo帆V鈦Ti鋼板1715MnVYB231-700.120.181.200.060.200.600.041.201812CrMoYB237-70<0.1

16、50.400.700.200.400.400.700.400.55材類別號(hào)其它硫S磷P抗拉強(qiáng)度obkg/屈服點(diǎn)0-skg/延伸率Ss%沖擊值abkgm/備注不大于鋼板1715MnVYB231-700.0500.0505440181812CrMoYB237-70Cu<0.300.0400.04042252171915CrMoYB237-70Cu<0.300.0400.040452621620Cr5MoYB237-700.0300.035402022122112CrMoVYB529-700.0400.0405440172212Cr2MoWVBYB529-700.0350.0355535182312Cr3MoVSiTiBYB529-700.0350.0356445182412CrMoVYB529-700.0400.04048452626211965縱向橫向251