在钢桶上印着两个日期标记，互相不一致怎么办？
文/三哥
有时，钢桶的使用者会询问是否需要在钢桶底部印上日期，然后与在侧面标上的日期必须匹配，特别是“年”标志。
在新钢桶底部加印不完整的联合国标志是根据联合国6.1.3.2的规定(另见《国际海事危险货物规则》(IMDG)同一段)。《联邦法规法典》第49条第178.503(a)(10)条规定：此标识旨在帮助钢桶翻新和再制造。压花标志不打算作为桶的联合国认证标志，在质量超过30kg/L的包装情况下，需要在侧面。
完整标记通常在完全装配和泄漏测试后，或翻新或再制造后放置在侧面。在大多数情况下，新桶是制造的，并在两个标记位置注明同一年，因为新钢桶通常是定做的。
在某些情况下，钢桶的底部可能在最终组装或完成包装制造之前被冲压和压印标志。在这种情况下，底部和侧面标志的年份可能会不同。这是可以接受的，因为表明最终装配位于钢桶侧面的完整标志是制造商的认证标志(见178.2(b))。
因此，如果桶底在2020年制造并压印，但直到2021年才组装成新的桶并进行泄漏测试，那么标记可能会冲突。翻新或再制造的钢桶通常有冲突的标志，因为翻新修理钢桶的人必须申请一个新的完整的标志。
（原文来源：ISDI）
Alert 20-03: Marking of the Date on Steel Drums
Explanation of the two date marks placed on a steel drum during manufacture.
Occasionally, users of steel drums inquire as to whether or not the date required to be embossed on the bottom of a steel drum and then marked on the side must match, specifically the “year” mark.
The embossment of an incomplete UN mark on the bottom of a new steel drum is based on a UN requirement in 6.1.3.2 (see also the same paragraph in the International Maritime Dangerous Goods (IMDG) Code). The Code of Federal Regulations Title 49 §178.503(a)(10) states: This marking is intended as an aid for reconditioning and remanufacturing. The embossed mark is not intended as the drum’s UN certification mark, which is required to be on the side in the case of a packaging with a mass of more than 30kg/L.
The complete mark is normally placed on the side after full assembly and leak testing or after reconditioning or remanufacture. In most circumstances, new drums are manufactured and marked noting the same year in both marking locations as drums are generally made to order. In some cases, the drum’s bottom may be cut and embossed prior to final assembly or completion of manufacture of the packaging. In that case, the year embossed on the bottom and side may differ. This is acceptable since the complete mark indicating final assembly is located on the side of the drum is the mark that is the manufacturer’s certification mark (see 178.2(b)). So, if the drum bottom was manufactured and embossed in 2019 but not assembled into a new drum and leak tested until 2020, then the markings could conflict. Reconditioned or remanufactured drums normally have conflicting marks as the person who reconditions the drum must apply a new complete mark.
