产品规格
(1)、材质:304、304L、316、316L、201及客户需要材质。
(2)、产品加工标准:美标:ASTM-A312、ASTMA778、ASTMA554,
国标:GB/T12771-2000。GB18705-2000
(3)、具体产品规格见下表:
1.1 工业配管用不锈钢管; 执行标准:ASTM A312,ASTM A778,GB12771
称呼外径 outside diameter |
厚度thickness 外径 |
理 论 壁 厚 |
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SCH-5S |
SCH-10S |
SCH-40S |
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N.B |
NPS |
in |
mm |
mm |
mm |
mm |
15 |
1/2" |
0.840 |
21.34 |
1.65 |
2.11 |
2.77 |
20 |
3/4" |
1.050 |
26.67 |
1.65 |
2.11 |
2.87 |
25 |
1" |
1.315 |
33.40 |
1.65 |
2.77 |
3.38 |
32 |
11/4" |
1.660 |
42.16 |
1.65 |
2.77 |
3.56 |
40 |
11/2" |
1.900 |
48.26 |
1.65 |
2.77 |
3.68 |
50 |
2" |
2.375 |
60.33 |
1.65 |
2.77 |
3.91 |
65 |
21/2" |
2.875 |
73.03 |
2.11 |
3.05 |
5.16 |
80 |
3" |
3.500 |
88.90 |
2.11 |
3.05 |
5.49 |
90 |
31/2" |
4.000 |
101.60 |
2.11 |
3.05 |
5.74 |
100 |
4" |
4.500 |
114.30 |
2.11 |
3.05 |
6.02 |
125 |
5" |
5.563 |
141.30 |
2.77 |
3.40 |
6.55 |
150 |
6" |
6.625 |
168.28 |
2.77 |
3.40 |
7.11 |
200 |
8" |
8.625 |
219.08 |
2.77 |
3.76 |
8.18 |
1.2 工业配管用不锈钢管外径、壁厚和长度公差
项目 规格 |
外径 |
厚度 |
长度 |
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ASTM A312 |
外径 O.D.(mm) |
≥10.29 <48.26 |
≥48.26 <114.3 |
≥114.3 <219.08 |
≥219.08 <457.2 |
±12.50% |
指定长度 |
公差(mm) |
+0.4 -0.8 |
±0.8 |
+1.6 -0.8 |
+2.4 -0.8 |
+6mm/m -0mm/m |
注:弯曲度公差:±1mm/M
钢管的长度:为2—8M;
经供需双方协商,钢管长度可以调整。
2.1 机械构造用不锈钢圆管; 执行标准:ASTM A554;GB18705
厚度mm
外径mm |
0.6 |
0.7 |
0.8 |
0.9 |
1.0 |
1.2 |
1.4 |
1.5 |
1.6 |
1.8 |
2.0 |
2.2 |
2.5 |
2.8 |
3.0 |
3.2 |
3.5 |
15.9 |
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19.0 |
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22.2 |
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25.4 |
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31.8 |
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38.1 |
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50.8 |
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63.5 |
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76.2 |
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88.9 |
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101.6 |
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114.3 |
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注:阴影斜线部分表示无法生产。
壁厚2.0以下采用冷轧(带)制造;2.0以上可采用冷轧或热轧制造。
2.2 机械构造用不锈钢圆管外径允许偏差
供货状态 |
外径D |
允许偏差 |
抛光状态 (SB) |
≤25 |
±0.20 |
>25~40 |
±0.20 |
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>40~50 |
±0.25 |
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>50~60 |
±0.28 |
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>60~70 |
±0.30 |
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>70~80 |
±0.35 |
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>80 |
±0.5%D |
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未抛光状态 (SNB) |
≤25 |
±0.25 |
>25~50 |
±0.30 |
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>50 |
±1.0%D |
2.3 钢管壁厚允许偏差:
壁厚≥0.40mm~1.00mm, 允许偏差±0.05mm;
壁厚 >1.00mm~1.9mm, 允许偏差±0.10mm;
壁厚≥2mm, 允许偏差±0.15mm;
2.4 弯曲度公差:
外径 <89.0mm或周长 <270mm, 弯曲度不大于1.5mm/m
外径≥89.0mm或周长≥270mm, 弯曲度不大于2.0mm/m
2.5 长度公差:
钢管一般以通常长度交货,范围为1000mm~8000mm,也可按协议生产;
钢管定尺长度为6000mm,全长允许偏差为0mm~+15mm
钢管端部应于轴线垂直,不应有毛刺,允许有不大于±0.15mm的轻微变形
3 方管ASTM A554 执行标准:ASTM A554;GB18705
厚度mm
管径mm |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1.0 |
1.2 |
1.4 |
1.5 |
1.6 |
1.8 |
2.0 |
2.2 |
2.5 |
2.8 |
3.0 |
15.9×15.9 |
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19.0×19.0 |
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25.0×25.0 |
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31.8×31.8 |
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38.1×38.1 |
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50.8×50.8 |
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注:阴影斜线部分表示无法生产。
壁厚2.0以下采用冷轧(带)制造;2.0以上可采用冷轧或热轧制造。
方型管的边长允许偏差,由供需双方协商。
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