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直缝电焊钢管壁厚允许偏差(GB/T 13793—2008) mm |
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壁厚 t |
普通精度 PD.A① |
较高精度 PD.B |
高精度 PD.C |
同截面壁厚允许差② |
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0.50~0.60 |
±0.10 |
±0.06 |
+0.03 -0.05 |
≤7.5%t |
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>0.60~0.80 |
±0.07 |
+0.04 -0.07 |
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>0.80~1.0 |
±0.10 |
±0.08 |
+0.04 -0.07 |
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>1.0~1.2 |
±10%t |
±0.09 |
+0.05 -0.09 |
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>1.2~1.4 |
±0.11 |
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>1.4~1.5 |
±0.12 |
+0.06 -0.11 |
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>1.5~1.6 |
±0.13 |
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>1.6~2.0 |
±0.14 |
+0.07 -0.13 |
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>2.0~2.2 |
±0.15 |
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>2.2~2.5 |
±0.16 |
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>2.5~2.8 |
±0.17 |
+0.08 -0.16 |
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>2.8~3.2 |
±0.18 |
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>3.2~3.8 |
±1.0%t |
±0.20 |
+0.10 -0.20 |
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>3.8~4.0 |
±0.22 |
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>4.0~5.5 |
±7.5%t |
±5%t |
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>5.5 |
±12.5%t |
±10%t |
±7.5%t |
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① 不适用于带式输送机托辊用钢管。 ② 不适合普通精度的钢管。同截面壁厚差指同一横截面上实测壁厚的最大值与最小值之差。 |
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