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。6 2.533333。5 3.544444.556778889 2.52.533323。5 3.544444。5 567788910 4.02。5 33333.53.5444.555。5 7891011121315 6.43333。5 3.53。5 44.55678911121416171922 10.033.53.544.54。5 56789101315182022 16.044。5 55667891113151924263034 20.044.55667891113151822283236 4。0T3。5 444。5 555。5 10Cr5Mo≤1.62.533333.53。5 44.5444。5 5.57788889 2。52。5 33333.53.544。5 454。5 5.5778991012 4.02。5 33333。5 3.544.555.5689101112141518 6.43333。5 444.555.57891113141618202226 10.033。5 444.555.578910121518222426 16.044。5 556789101215182228323640 20.044。5 567891112151822263438 4.0T3.5444。5 555。5 16Mn15MnV≤1.62。5 2。5 2。5 33333。5 3.53。5 3。5 44.555。566667 2。52。5 2。5 2.533333。5 3。5 3.53。5 44。5 55。567789 4。02。5 2.52.533333.53。5 44。5 567889101112 6。42。5 3333。5 3.53.544.556789111213141618 10.0333。5 3.5444。5 567891113151719 16。03.53.544.555678911121619222528 20。03。5 44.555。5 678911131519242630 (二）无缝不锈钢管壁厚 mm材料PNMPaDN1015202532405065801001251502002503003504004505006001Cr18Ni9Ti含 Mo 不锈钢≤1.02222.52。5 2.52。5 2。5 2。5 333。53.53。5444.5 1。622。5 2。5 2。5 2.52。5 333333。53.544。555 2。522。5 2.52。5 2.52。5 3333.53。544。55667 4.022。5 2。5 2.52。5 2。5 333.544。55678910 6。42。5 2。5 2。5 3333。5 44。5 567810111314 4。0T33.53.54444.5 (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0.25 33333.53.53。54444。54.5 0.6333。53.53。5444.55566 1.03。53。544.54。555.56778 1。644。5566778910 2.556789910121315
