公称压力管道壁厚对照表66741

（2025 年）最新公称压力（MPa)管道壁厚对比表 (一)无缝碳钢管壁厚 m m材料PNMPaDN101520253240506580100125150200250300350400450500600 2012CrMo15CrMo12Cr1MoV≤1.62。5 33333.53.544444.556778889 2.52。5 33323。5 3.544444.5567788910 4。02.533333。5 3.5444。5 55。5 7891011121315 6。43333。5 3。5 3。5 44。5 5678911121416171922 10。033。5 3.544。5 4。5 56789101315182022 16。044.555667891113151924263034 20.044。5 5667891113151822283236 4。0T3。5 444。5 555.5 10Cr5Mo≤1.62。5 33333。5 3。5 44.5444。5 5.57788889 2.52.533333。5 3.544。5 454。5 5。5 778991012 4。02。5 33333.53.544.555.5689101112141518 6.43333.5444.555。5 7891113141618202226 10.033。5 444。5 55.578910121518222426 16.044。5 556789101215182228323640 20.044.5567891112151822263438 4。0T3.5444。5 555.5 16Mn15MnV≤1.62.52.52.533333。5 3.53.53.544.555。566667 2.52。5 2.52.533333.53。5 3。5 3.544。5 55.567789 4.02。5 2。5 2.533333。5 3.544。5 567889101112 6。42.53333.53。5 3。5 44.556789111213141618 10.0333.53。5 444。5 567891113151719 16.03.53。5 44.555678911121619222528 20。03。5 44。5 55。5 678911131519242630 （二）无缝不锈钢管壁厚 mm材料PNMPaDN1015202532405065801001251502002503003504004505006001Cr18Ni9Ti含 Mo 不锈钢≤1.02222.52.52。5 2.52.52.5333。53.53。5444.5 1.622.52.52.52.52.5333333.53.544。555 2.522.52。5 2.52.52.53333。5 3。544。5 5667 4。022。5 2.52.52。5 2.5333。5 44。55678910 6.42.52.52.53333.544.5567810111314 4。0T33.53。5 4444。5 （三）焊接钢管壁厚 mm材料PNMPaDN20025030035040045050060070080090010001100120014001600焊接碳钢管（Q235A20）0.2555555556666667770。6556666677778889101.05566677889910111112 1.6667788910111213141516 2.57899101112131516 焊接不锈钢管0。2533333。53。53。54444。54。5 0.6333.53.53.5444.55566 1.03.53.544。54。555.56778 1.644.5566778910 2。556789910121315 内压金属直管的壁厚根据 SH 3059—2001《石油化工管道设计器材选用通则》确定：当 S0〈 Do /6 时， 直管的计算壁厚为：S0 = P D0/（2［σ]t...