AWWA C200-2023标准钢制水管尺寸允许偏差：1、厚度：板材、薄板或卷材（表1）或辅助管道（第4.10节）的公差下厚度应为适用的ASTM标准公差下标称厚度0.010英寸（0.254毫米）或第4.5.3节中规定的厚度的6%中的较小者。2、周长：根据规定的直径，管道外周的变化不得超过标称外周的±1.0%，但不得超过四分之三英寸（19毫米），除非必要时，端部的周长应符合第4.11节的要求。3、直线度：在整个管道长度上，与直线的最大偏差应为管道长度的0.2%。4、长度：管道长度应按照以下章节提供：a）规定长度应具有以下公差±2英寸（±51毫米）。该公差不适用于切割试样的较短长度。b）环形焊缝规定，应允许包含环焊缝的管道长度。制造商和买方可根据第4.11节规定的公差，在车间内使用搭接焊接接头连接一定长度的管道。

AWWA C200-2023 standard steel water pipe size allowable deviation: 1. Thickness: The thickness under the tolerance of the plate, sheet or coil (Table 1) or auxiliary pipe (Section 4.10) should be the smaller of the nominal thickness of 0.010 inches (0.254 millimeters) under the applicable ASTM standard tolerance or 6% of the thickness specified in Section 4.5.3. 2. Perimeter: According to the specified diameter, the variation of the outer circumference of the pipeline shall not exceed ± 1.0% of the nominal outer circumference, but shall not exceed three-quarters of an inch (19 millimeters), unless necessary, the end circumference shall comply with the requirements of Section 4.11. 3. Straightness: The maximum deviation from a straight line along the entire length of the pipeline should be 0.2% of the pipeline length. 4. Length: The length of the pipeline should be provided according to the following sections: a) The specified length should have the following tolerance of ± 2 inches (± 51 millimeters). This tolerance does not apply to shorter lengths of cut specimens. b) According to the regulations for circumferential welds, the length of pipelines containing circumferential welds should be allowed. Manufacturers and buyers may use lap welding joints to connect a certain length of pipeline in the workshop according to the tolerances specified in Section 4.11.