ISO/PAS 17712 and ASTM FACT SHEET
Customs & Border Protection has asked importers, carriers, brokers and manufacturers to ensure the integrity of their maritime shipments through a voluntary program called C-TPAT (Customs-Trade Partnership Against Terrorism). It’s a joint initiative between government and business, which is designed to protect global commerce from terrorism. As a requirement for participation, Customs requires that businesses apply for C-TPAT membership and, once accepted, agree to use high security seals for securing their container shipments that enter the United States. （海关及边境保护要求 出口商，运输公司，代理商和生产商通过C—TPAT（海关-商贸反恐贸易伙伴）确保他们海运运输的完整性。它在政府和企业之间起着联合主动性，指定保护全球商业免遭恐怖主义的攻击。 作为参与者的要求，海关要求企业申请C-TPAT会员，且一旦企业被接受，同意在他们进入美国的集装箱上使用高度安全封条）。
Customs used ASTM F1157, the “Standard Practice for Classifying the Relative Performance of the Physical Properties of Security Seals,” as the standard for determining a seal’s physical strength characteristics.  Initially, Customs selected Category “D” as the minimum requirement for high security seals that would be used on containers entering the United States.  That range was modified within ISO/PAS 17712 to reflect the minimum global standard for high security seals. Customs has deferred to ISO/PAS 17712 as the standard for bolt and cable seal compliance for C-TPAT and ISO/PAS 17712. （海关使用安全密封件物理性能的分类 标准号: ASTM F1157，作为决定封条物理性能的标准。最初，海关选择类型“D”作为使用在进入美国本土的集装箱上使用的高安全封条。这些修改的ISO/PAS17712反映了高安全封条的全球的最低标准。海关递延ISO/PAS17712作为闩栓和缆 封条的遵守C-TPAT和ISO/PAS17712的标准。）
Since no international standard for mechanical seals exists, criteria from ASTM F1157 were used to draft ISO/PAS 17712 -a publicly available specification to determine seal categories and their strength requirements that are appropriate for container shipments within international trade. The table below compares the strength characteristics of Brooks’ Intermodal II, IV and V mechanical bolt seals against ISO/PAS’ guidance.  Customs’ requirements, as determined by ASTM F1157, are included only as a guide. ISO/PAS 17712 is the reference for seal acceptance. （既然没有机械密封的标准存在。从安全密封件物理性能的分类 标准号: ASTM F1157的标准被用来起草ISO/PAS17712-一分大家都容易获得的说明书以决定封条类型和在国际贸易中他们适合集装箱运输性能要求。下表就ISO/PAS指引对代理商综合运输II, IV，V和机械密封的闩栓封条进行比较。海关要求，如: ASTM F1157决定仅包括指导。ISO/PAS 17712是可接受的封条的参考。

封条的PAS ISO 17712 标准 完整版本下载.pdf