本技术报告说明了计算各种管道特性所需的方程式和模板，包括:管道性能特性，如轴向强度、内压阻力和抗倒塌性；最低物理性能；产品装配力（扭矩）；产品测试压力；与测试标准相关的关键产品尺寸；测试设备的关键尺寸；以及试样的临界尺寸。对于与性能特性相关的方程式，还提供了有关其开发和使用的大量背景信息。此处给出的方程式适用于根据API 5CT或ISO 11960、API 5DP或ISO 11961以及API 5L或ISO 3183（如适用）制造的管道。这些方程式和模板可能会扩展到其他管道，但需谨慎。 生产期间冷加工的管道包含在本技术报告的范围内（例如，冷旋转矫直管道）。生产后冷加工改性的管道，如可膨胀管和连续油管，不在本技术报告的范围内。编辑注:您可能会注意到，这是出版物的第7版，被列为取代“第1版”。这就是为什么根据API这样列出的原因:“5C3的文档类型是”公告“对于其前6版。当其文件类型从公告更改为技术报告时，根据该更改错误地将其重新编辑为第一版，使其成为TR 5C3第一版，而实际上本应是TR 5C3第七版。版本编号保留标准的字母数字标识符，与文件类型无关，因为这可以而且确实如此改变 新版5C3正在纠正版本编号中的错误。"

This Technical Report illustrates the equations and templates necessary to calculate the various pipe properties, including:pipe performance properties, such as axial strength, internal pressure resistance, and collapse resistance;minimum physical properties;product assembly force (torque);product test pressures;critical product dimensions related to testing criteria;critical dimensions of testing equipment; andcritical dimensions of test samples.For equations related to performance properties, extensive background information is also provided regarding their development and use.Equations presented here are intended for use with pipe manufactured in accordance with API 5CT or ISO 11960, API 5DP or ISO 11961, and API 5L or ISO 3183, as applicable. These equations and templates may be extended to other pipe with due caution. Pipe cold-worked during production is included in the scope of this technical report (e.g. cold rotary straightened pipe). Pipe modified by cold working after production, such as expandable tubulars and coiled tubing, is beyond the scope of this technical report.Editorial note:You may notice that this is the 7th edition of a publication that is listed as replacing a "1st" edition. Here is why that is listed that way according to API: "5C3's document type was a "Bulletin" for its first 6 editions. When its document type was changed from a Bulletin to a Technical Report, it was mistakenly re-editioned to a 1st Edition based on that change, making it TR 5C3 1st Edition when it really should have been TR 5C3 7th Edition. The edition numbering stays with the alphanumeric identifier for a standard and is not associated with the document type, since that can and does change. This new edition of 5C3 is correcting the error in the edition numbering."