1.1 本指南旨在向读者提供施工检查程序和当前技术的知识，这些知识可用于在恢复使用前向石油服务中的地上储罐（AST）的所有者或操作员提供有关新的、修复的或重建的储罐底部水力完整性的相关信息。本指南不适用于卧式AST、使用UL 142制造储罐，也不适用于由混凝土或其他有色金属材料制成的储罐。 1.2 本指南中介绍的方法和技术的采用不是强制性的，而是可以选择的选项，以确定产品通过新的、修复的或重建的储罐底部泄漏的可能性。 1.3 本指南无意以优惠的方式建议或处理任何技术。 1.4 负责应用本指南的人员应是在石油服务中使用的地上储罐的设计、检验、施工或其组合方面具有经验的知识渊博的人员，并且当使用与罐底维修相关时，还应根据API 653的要求进行认证。 1.5 参考API RP 575，了解维护和检查常压和低压储罐的有用信息和推荐规程。 1.6 根据实践要求，本指南采用公制单位（SI单位）编写 E621 .括号内为英语度量衡等效项。 1.7 应在使用前确定本指南对拟定储罐配置和使用条件的适用性。 1.8 本指南符合ASTM制定和后续使用标准的政策。 1.9 本指南可由负责的技术委员会随时修订，必须每五年审查一次，如果未修订，则重新批准或撤回。请您对本指南的修订或其他标准发表意见，并将其发送至ASTM International，地址:100 Barr Harbor Drive，W.Conshohocken，PA 19428。 1.10 本指南不打算用作规范、条例或法规范本。 1.11 本指南并不涵盖可能正确应用的每个储罐底部检查程序。 1.12 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.13 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 石油服务中AST的检查、维修和建造应至少符合API 650和API 653的要求。这些标准描述了测试新的或修复的AST的焊接质量以及结构和水力完整性的方法。随着对环境保护的日益重视，以及与AST中石油材料储存相关的环境问题，此类储罐的所有者和操作员可能希望或需要一份指南，专门介绍评估新的或修复的储罐底部水力完整性的现有和增强方法。 5.2 储罐底部故障的后果包括产品的经济损失、储罐底部的维修或更换成本、环境修复成本以及可能导致不利公共关系或监管行动的对邻近土地的潜在损害或伤害。 此外，石油产品的释放带来了潜在的火灾或爆炸条件。 5.3 AST的所有者和操作员或其代理人可以使用本指南来帮助选择评估其修复或新储罐底部液压完整性的方法。方法的选择应基于监管和经济标准，其中包括运营和成本/效益方面的考虑。 5.4 本指南适用于在石油服务中有AST维修和施工经验的个人。 5.5 本指南适用于维修或建造AST。本指南不涉及AST底部的适用性或暗示其使用寿命。 5.6 本指南旨在与API 650和API 653中提供的液压完整性标准结合使用，并作为其补充。 5.7 此处包含的程序或方法可能会得到先前完成并记录在案的绩效评估的支持，该评估可能会作为有价值的结果验证。

1.1 This guide is intended to provide the reader with a knowledge of construction examination procedures and current technologies that can be used to give an owner or operator of an aboveground storage tank (AST) in petroleum service, relevant information on the hydraulic integrity of a new, repaired, or reconstructed tank bottom prior to return to service. This guide does not pertain to horizontal ASTs, manufacture of tanks using UL 142, or to tanks constructed of concrete or other non-ferrous materials. 1.2 The adoption of the methods and technologies presented in this guide are not mandatory, rather they represent options that may be selected to identify the likelihood of product leaking through a new, repaired, or reconstructed tank bottom. 1.3 This guide is not intended to suggest or treat any technology in a preferential manner. 1.4 The person responsible for applying this guide should be a knowledgeable individual with experience in the design, inspection, construction, or combination thereof, of aboveground storage tanks for use in petroleum service, and should also be certified under the requirements of API 653 when use is related to tank bottom repair. 1.5 Refer to API RP 575 for useful information and recommended practices for maintenance and inspection of atmospheric and low pressure storage tanks. 1.6 This guide is written in metric measure units (SI Units) in accordance with requirements of Practice E621 . English measure equivalents are in parentheses. 1.7 The applicability of this guide to the proposed tank configuration and service conditions should be established prior to use. 1.8 This guide complies with ASTM policy for development and subsequent use of a standard. 1.9 This guide is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this guide or for additional standards and should be addressed to ASTM International, 100 Barr Harbor Drive, W. Conshohocken, PA 19428. 1.10 This guide is not intended for use as a model code, ordinance or regulation. 1.11 This guide does not cover every tank bottom inspection procedure that may be properly applied. 1.12 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.13 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Inspection, repair, and construction of ASTs in petroleum service should follow at a minimum the requirements of API 650 and API 653. These standards describe methods for testing the weld quality and structural and hydraulic integrity of new or repaired ASTs. With increasing emphasis on protecting the environment and with environmental issues related to the storing of petroleum materials in ASTs, owners and operators of such tanks may want or need a guide devoted to existing and enhanced methods for evaluating the hydraulic integrity of new or repaired tank bottoms. 5.2 The consequences of a tank bottom failure include the economic loss of product, cost of repair or replacing the tank bottom, and exposure to the cost of environmental remediation and potential damage or harm to adjacent lands that may give rise to adverse public relations or regulatory action. In addition, releases of petroleum products introduce potential fire or explosive conditions. 5.3 Owners and operators of ASTs or their agents can use this guide to help choose methods of evaluating the hydraulic integrity of their repaired or new tank bottoms. Selection of the methods should be based on regulatory and economic criteria that include operational and cost/benefit considerations. 5.4 This guide is intended for use by an individual experienced in repair and construction of ASTs in petroleum service. 5.5 This guide is intended for use when repairing or building ASTs. This guide does not address suitability for use or imply useful life of an AST bottom. 5.6 This guide is intended to be used in conjunction with and as a supplement to standards provided for hydraulic integrity in API 650 and API 653. 5.7 Procedures or methods included here may be supported by a previously completed and documented performance evaluation(s) that may lend itself as valuable results validation.