Overview of AWWA C200 Spiral Seam Steel Pipe Standard for Water Transmission Pipeline: 1. Scope: The AWWA C200 standard covers butt welded straight seam or spiral seam steel pipes of 6 inches (150 millimeters) and above used for water transmission and distribution, including pipeline manufacturing, welding operation requirements, allowable deviations in thickness and size, end preparation, special section manufacturing, inspection and testing procedures. 2、 Revision process: The first steel pipe standard released by AWWA was 7A. 3 and 7A. 4 in 1940. Standard 7A. 4 applies to steel pipes with a diameter less than 30 inches (750 millimeters), while Standard 7A. 3 applies to steel pipes with a diameter greater than or equal to 30 inches (750 millimeters). Subsequently, considering that some pipelines used in water supply facilities were manufactured in steel mills rather than manufacturers' workshops, two new AWWA standards were issued in 1960. AWWA C201 replaces 7A.3 and is applicable to all pipes made of steel plates or steel plates in the manufacturer's workshop, regardless of diameter. The physical and chemical properties refer to the properties of the sheet or material used to manufacture pipelines. These performances are a function of steel mill practice and are not significantly affected by manufacturing procedures. AWWA C202 replaces 7A. 4 and involves rolled pipes typically produced in production tube mills. The specified physical and chemical properties are the physical and chemical properties of the completed pipeline. Physical testing is conducted on pipelines, not on the steel from which they are sourced. In many cases, physical properties are significantly affected by the pipeline manufacturing process. AWWA C201 was revised in 1966, and AWWA C202 was revised in 1964. AWWA C201 and AWWA C202 were both replaced by AWWA C200-75, approved by the AWWA Board of Directors on January 26, 1975. AWWA C200 includes all types and grades of steel pipes with a diameter of 6 inches (150 millimeters) and above for water supply facilities, regardless of the source of pipe manufacturing. Pipelines manufactured in the manufacturer's workshop or steel pipe factory are suitable for water supply facilities with sufficient quality assurance. By reference, AWWA C202 (involving mill type steel water pipes) includes API-5L and API-5LX pipeline grades, which are manufactured according to API high-pressure application standards. Including ASTM A570/A570M and ASTM A572/A572MAWWA C200-75, high-strength steel in API high-pressure pipelines has been omitted from AWWA C200-75 due to redundancy. The API-5L and API-5LX pipeline grades fully comply with all requirements of AWWA C200 and can be used for water supply facility applications if availability or other economic factors require it. AWWA C200-75 introduces design standards for determining wall thickness to meet internal pressure conditions. These standards help in selecting the optimal combination of steel pipe thickness and material. The revisions in AWWA C200-86 include clarification on the forming of lap ends and gasket ends, as well as testing of O-ring gaskets. The subsequent version of this standard was approved by the AWWA Board of Directors on June 23, 1991; February 2, 1997; June 12th, 2005, June 10th, 2012, and January 14th, 2017. This version was revised on October 23, 2023.

AWWA C200输水管道用螺旋缝钢管标准概述：一、范围：AWWA C200标准涵盖了用于输水和配水的6英寸（150毫米）及以上的对接焊接直缝或螺旋缝钢管，包括管道制造、焊接操作要求、厚度和尺寸的允许偏差、端部制备、特殊截面制造、检验和测试程序。二、修订过程：AWWA发布的第一个钢管标准是1940年发布的7A.3和7A.4。标准7A.4适用于直径小于30英寸（750毫米）的钢管，标准7A.3适用于直径大于或等于30英寸（750mm）的钢管。随后，鉴于供水设施中使用的一些管道是在钢厂而不是在制造商的车间制造的，1960年发布了两项新的AWWA标准。AWWA C201取代了7A.3，适用于在制造商车间用钢板或钢板制造的所有管道，无论直径如何。物理和化学性质是指制造管道的板材或板材的性质。这些性能是钢厂实践的函数，不受制造程序的显著影响。AWWA C202取代了7A.4，涉及通常在生产管磨机中生产的轧管。指定的物理和化学性质是已完成管道的物理和化学品性质。物理测试是在管道上进行的，而不是在其来源的钢材上进行的。在许多情况下，物理性能受到管道制造过程的显著影响。AWWA C201于1966年修订，AWWA C202于1964年修订。AWWA C201和AWWA C202均被AWWA C200-75取代，AWWA董事会于1975年1月26日批准。AWWA C200包括用于供水设施的直径为6英寸（150毫米）及以上的所有类型和等级的钢管，无论管道制造来源如何。在有足够质量保证的情况下，在制造商车间或钢管厂制造的管道适用于供水设施。通过参考，AWWA C202（涉及mill-type钢制水管）包括API-5L和API-5LX管道等级，这些管道等级按照API高压应用标准制造。包括ASTM A570/A570M和ASTM A572/A572MAWWA C200-75、API高压管道中的高强度钢因冗余而从AWWA C200-75中省略。API-5L和API-5LX管道等级完全符合AWWA C200的所有要求，如果可用性或其他经济因素要求，可用于供水设施应用。AWWA C200-75引入了确定壁厚以满足内部压力条件的设计标准。这些标准有助于选择钢管厚度和材料的最佳组合。AWWA C200-86中的修订包括澄清搭接端和垫片端的成型以及O型圈垫片的测试。本标准的后续版本于1991年6月23日获得AWWA董事会的批准；1997年2月2日；2005年6月12日、2012年6月10日和2017年1月14日。本版本于2023年10月23日修订。