標(biāo)準(zhǔn)
ASTM A333——Seamless and Welded Steel Pipe for Low-Temperature Service
主要生產(chǎn)鋼管牌號
Grade 1, Grade 3, Grade 4, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10, Grade 11
沖擊溫度
級別 |
最低沖擊試驗(yàn)溫度 |
|
℉ |
℃ |
|
Grade 1 |
-50 |
-45 |
Grade 3 |
-150 |
-100 |
Grade 4 |
-150 |
-100 |
Grade 6 |
-50 |
-45 |
Grade 7 |
-100 |
-75 |
Grade 8 |
-320 |
-195 |
Grade 9 |
-100 |
-75 |
Grade 10 |
-75 |
-60 |
力學(xué)性能
標(biāo)準(zhǔn) |
牌號 |
抗拉強(qiáng)度(MPa) |
屈服強(qiáng)度(MPa) |
伸長率(%) |
|
縱向 |
橫向 |
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ASTM A333 |
Grade 1 |
≥380 |
≥205 |
≥35 |
≥25 |
Grade 3 |
≥450 |
≥240 |
≥30 |
≥20 |
|
Grade 4 |
≥415 |
≥240 |
≥30 |
≥16.5 |
|
Grade 6 |
≥415 |
≥240 |
≥30 |
≥16.5 |
|
Grade 7 |
≥450 |
≥240 |
≥30 |
≥22 |
|
Grade 8 |
≥690 |
≥515 |
≥22 |
||
Grade 9 |
≥435 |
≥315 |
≥28 |
||
Grade 10 |
≥550 |
≥450 |
≥22 |
||
Grade 11 |
≥450 |
≥240 |
≥18 |
化學(xué)成分
標(biāo)準(zhǔn) |
牌號 |
化學(xué)成分(%) |
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C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Mo |
V |
Al |
||
ASTM A333 |
Grade 1 |
≤0.30 |
0.40-1.06 |
≤0.025 |
≤0.025 |
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Grade 3 |
≤0.19 |
0.18-0.37 |
0.31-0.64 |
≤0.025 |
≤0.025 |
3.18-3.82 |
||||||
Grade 4 |
≤0.12 |
0.18-0.37 |
0.50-1.05 |
≤0.025 |
≤0.025 |
0.44-1.01 |
0.47-0.98 |
0.40-0.75 |
0.04-0.30 |
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Grade 6 |
≤0.30 |
≥0.10 |
0.29-1.06 |
≤0.025 |
≤0.025 |
|||||||
Grade 7 |
≤0.19 |
0.13-0.32 |
≤0.90 |
≤0.025 |
≤0.025 |
2.03-2.57 |
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Grade 8 |
≤0.13 |
0.13-0.32 |
≤0.90 |
≤0.025 |
≤0.025 |
8.40-9.60 |
||||||
Grade 9 |
≤0.20 |
0.40-1.06 |
≤0.025 |
≤0.025 |
1.60-2.24 |
0.75-1.25 |
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Grade 10 |
≤0.20 |
0.10-0.35 |
1.15-1.50 |
≤0.03 |
≤0.015 |
≤0.15 |
≤0.25 |
≤0.015 |
≤0.50 |
≤0.12 |
≤0.06 |
|
Grade 11 |
≤0.10 |
≤0.35 |
≤0.6 |
≤0.025 |
≤0.025 |
≤0.50 |
35.0-37.0 |
≤0.50 |
根據(jù)中華人民共和國國家標(biāo)準(zhǔn)GB-17395-1988
無縫鋼管外徑允許偏差
表1:標(biāo)準(zhǔn)化外徑允許偏差鋼管重量
鋼管按實(shí)際重量交貨.也可按理論重量交貨。實(shí)際重量交貨可分為單根重量或每批重量兩種。
鋼管每米的理論重量按式 (1)計(jì)算:
式中:W——鋼管理論重量。kg/m;
π=3.1416:
ρ——鋼的密度.kg/dm 3;
D——鋼管公稱外徑,mm
S——鋼管公稱壁厚 mm。
按理論重量交貨的鋼管.單根鋼管理論重量與實(shí)際重量的允許偏差分為五級(見表12)。
按理論重量交貨的鋼管,每批不小于10 t鋼管的理論重量與實(shí)際重量允許偏差為±7.5%或±5%。
偏差等級 |
壁厚允許偏差 |
|
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S/D |
|
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0.1< S/D |
0.05<S/D≤0.1 |
0.025<S/D≤0.05 |
S/D≤0.025 |
|
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S1 |
± 15%,最小±0.6 mm |
|
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S2 |
A |
±12.5%,最小±0.4 mm |
|
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B |
+正偏差取決于重量要求 -12.5 |
|
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S3 |
A |
± 10%,最小± 0.2mm |
|
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B |
± 10% |
± 12.5% |
± 15% |
|
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最小± 0.4mm |
|
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C |
+正偏差取決于重量要求 -10% |
|
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S4 |
A |
± 7.5%, 最小± 0.15 mm |
|
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B |
± 7.5% |
± 10% |
± 12.5% |
± 15% |
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最小±0.2 mm |
|
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S5 |
± 5%,最小± 0.10 mm |
|
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注:S是鋼管公稱壁厚,D是鋼管公稱外徑。 |
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