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本操作法仅適用于压力低于25公斤/平方公分之锅炉附属热力管道工程,(关于锅炉本本配管及上下水道等,不包括在本操作法之内。)一、管道煨制(一)材料检查:1.用外卡规或样板测量管子外径,容许误差大于160公厘之管道为3公厘,小于160公厘之管道为1.5公厘;2.管壁厚度的允许误差是:厚不超过15%,薄不超过10%;3.管子椭圆度之检查,大于160公厘之管子不超过5公厘,小于160公厘之管子不超过2.5公厘,检查时用样板或其他工具;4.弯曲度检查,每公尺不能超过1.5公厘;
This operation method is only applicable to boiler auxiliary heat pipelines whose pressure is lower than 25 kg / cm 2. (The boiler pipe, sewer, etc. are not included in this operation method.) I. Pipe simmer Check: 1. With the outer card gauge or sample pipe diameter measurement, tolerance of more than 160 mm pipe for the 3 mm, less than 160 mm of the pipe is 1.5 mm; 2. Wall thickness tolerance is: thick Not more than 15%, not more than 10% of the thickness; 3. Inspection of the tube ovality, no more than 5 mm for tubes greater than 160 mm and less than 2.5 mm for tubes less than 160 mm; ; 4 bend test, each meter can not exceed 1.5 mm;