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蕪湖管線用無縫鋼管 管子壁厚規格表
|
鋼級(GB/T9711.1) |
L175(Ⅰ、Ⅱ類) |
L210 |
L245 |
L290 |
L320 |
L360 |
L390 |
L415 |
L450 |
L485 |
L555 |
|
鋼級(ANSI/API Spec 5L ) |
A25(Ⅰ、Ⅱ類) |
A |
B |
X42 |
X46 |
X52 |
X56 |
X60 |
X65 |
X70 |
X80 |
|
規定總伸長應力Rt0.5(min)Mpa |
175 |
210 |
245 |
290 |
320 |
360 |
390 |
415 |
450 |
485 |
555 |
|
抗拉強度(min)Mpa |
315 |
335 |
415 |
415 |
435 |
460 |
490 |
520 |
535 |
570 |
625 |
|
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 | |
|
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 | |
|
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 |