总则一、执行标准: 《预应力混凝土输水管》(管芯绕丝工艺)GB5696—85二、抽样方法: 1.从成品堆垛中,根据抽取的规格,每种规格任意编取100根管子(至少30根),然后从已编号的管中以随机抽样或抽签方法(抽签应与被检单位有关人员共同进行),抽取10根管作抽检样管。 2.(1)行业评检时,被检单位有三种或三种以上产品规格时。抽检两种规格,少于三种规格时则每种规格均需抽查; General Principles First, the implementation of the standards: “Prestressed Concrete Water Pipe” (Wicked Wire Process) GB5696-85 Second, the sampling method: 1. From the finished stack, according to the extracted specifications, each specification randomly prepared 100 tubes (at least 30), and then randomly sample or draw lots from the numbered tubes (the lottery should be carried out together with the person inspected) and select 10 tubes for sampling. 2. (1) When the inspected company has three or more product specifications during the industry review. Sampling two kinds of specifications, when less than three kinds of specifications, each type requires random inspection;