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1范围本欧洲标准规定的铁索体钢全焊透焊缝超声验收级别2和3分别对应于EN25817”的质量级别B和C。采用其它验收级别可征得签约单位同意。本标准不包括与EN25817D级相应的验收级别，因超声检测不推荐用于这种焊缝质量。这些验收级别可用于按EN12O62相关标准进行的检测。但经签约
1 Scope The ultrasonic acceptance levels 2 and 3 of ferritic steel full penetration welds specified in this European Standard correspond respectively to the quality levels B and C of EN 25817. The acceptance levels of other acceptance levels are subject to the approval of the contracting authority This standard does not cover compliance with EN25817D The corresponding acceptance level, due to ultrasonic testing is not recommended for the quality of such welds.These acceptance levels can be used for testing according to EN12O62 standards.But after signing