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            Home - Products -管線用無縫鋼管

            管線用無縫鋼管

            管線用無縫鋼管

            標準:
            API SPEC 5L——美國石油學會標準
            GB/T9711.2——中國國家標準
            用途:
            用于石油、天然氣工業中的氧、水、油輸送管
            主要生產鋼管牌號:
            B、X42、X52、X60、X65、X70

            尺寸公差:

            鋼管種類

            鋼管外徑(D)

            鋼管壁厚(S)

            管體

            鋼管外徑 (mm)

            允許偏差(mm)

            鋼管外徑(mm)

            允許偏差(mm)

            ≥60.3且S<20

            ±0.75%

            ≤73.0

            +15%,-12.5%

            ≥60.3且S≥20

            ±1.00%

            >73.0且S<20

            +15%,-12.5%

             
             

            >73.0且S≥20

            +17.5%,-10

            力學性能:

            標準

            牌號

            抗拉強度(MPa)

            屈服強度(MPa)

            屈強比

            伸長率(%)

            0℃沖擊功

            Akv(J)

            熱處理狀態

            API SPEC 5L

            GB/T9711.2

            B

            ≥415

            245~440

            ≤0.80

            22

            ≥40

            正火

            X42

            ≥415

            290~440

            ≤0.80

            21

            ≥40

            正火

            X52

            ≥460

            360~510

            ≤0.85

            20

            ≥40

            正火

            X60

            ≥520

            415~565

            ≤0.85

            18

            ≥40

            正火

            X65

            ≥535

            450~570

            ≤0.90

            18

            ≥40

            淬火+回火

            X70

            ≥570

            485~605

            ≤0.90

            18

            ≥40

            淬火+回火

            化學成分:

            標準

            牌號

            化學成分(%)

            CEV(%)

            C

            Si

            Mn

            P

            S

            V

            Nb

            Ti

            API SPEC 5L

            GB/T9711.2

            B

            ≤0.16

            ≤0.40

            ≤1.10

            ≤0.020

            ≤0.010

            ≤0.42

            X42

            ≤0.17

            ≤0.40

            ≤1.20

            ≤0.020

            ≤0.010

            ≤0.05

            ≤0.05

            ≤0.04

            ≤0.42

            X52

            ≤0.20

            ≤0.45

            ≤1.60

            ≤0.020

            ≤0.010

            ≤0.10

            ≤0.05

            ≤0.04

            ≤0.45

            X60

            ≤0.21

            ≤0.45

            ≤1.60

            ≤0.020

            ≤0.010

            ≤0.15

            ≤0.05

            ≤0.04

            協議

            X65

            ≤0.16

            ≤0.45

            ≤1.60

            ≤0.020

            ≤0.010

            ≤0.06

            ≤0.05

            ≤0.06

            ≤0.45

            X70

            ≤0.16

            ≤0.45

            ≤1.70

            ≤0.020

            ≤0.010

            ≤0.06

            ≤0.05

            ≤0.06

            ≤0.45

            注:
            1.0.015%≤Altot<0.06%;N≤0.012%;Al/N≥2/1;Cu≤0.25%;Ni≤0.30%;Cr≤0.30%;Mo≤0.10%
            2.V+Nb+Ti≤0.15
            3.X60、X65、X70經協商Mo≤0.35%

             
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