tubing is the piping and facility that need be dismantled after cleaning Connect piping in the cleaning system to form circulating loop. Р临时配管用软塑料管。Temporary tubing adopts soft plastic tube.Р检验与验收Test and acceptР钝化表面目测,钝化膜完整,颜色一致。РCheck the surface of passivation visually to make sure that passivation film plete and has the same color.Р在回路的最后一个焊缝采用铁氰化钾溶液显蓝测定,变色时间大于30秒钟。РOn last welding seam, Adopt potassium ferrocyanide for blue indication ameasuring and color changes for more than 30 minutes.Р(蓝点试验 blue indication test: Р用1克铁氰化钾K3[6)]加3毫升(65%_85%)硝酸HNO3和100毫升水配制成溶液(宜现用现配)。然后用滤纸浸渍溶液后,贴附于待测表面或直接将溶液涂、滴于待测表面,30秒内观察表面显现蓝点情况,有蓝点为不合格。)РBlue indication test solution is mixed with 1g K3[6)], 3ml 65%_85% HNO3 and 100ml water. Use filter paper to soak with this solution and stick it to the material
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