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大口径冷弯管加工的作业标准及维护

发布时间:2019-05-17人气:88

大口径冷弯管加工的作业标准及维护,近期网上有几篇报道,声称目前的弯管价格水平已经达到了近四年来的新低,但从监测的数据来看,此观点明显有误。

The working standard and maintenance of large caliber cold bend pipe processing, there are several reports on the Internet in the near future, claiming that the current bend price level has reached a new low for nearly four years, but from the monitoring data, this view is obviously wrong.

作业标准采用目测法检查外观质量:防腐层平滑,无暗泡、麻点、皱折、裂纹;采用电火花检漏仪进行针孔检测,无漏点为合格;弯制弯管宜采用无缝、直缝结构,不宜采用螺旋焊缝钢管制作;冷弯管的外观和主要尺寸应该无裂纹,机械损伤,弯管椭圆度小于2.0%弯曲角度误差在±0.2°应将冷弯管放平后检查冷弯管的平面度;其平面度不大于8mm 冷弯管褶折深度≤3mm。

Visual inspection method is used to inspect the appearance quality: the anticorrosion layer is smooth, without dark bubbles, pockmarks, wrinkles and cracks. The electric spark leak detector is used to test the holes without leakage. The curved pipe is suitable for seamless and straight seam structure, and the spiral welded pipe should not be used. The appearance and main dimensions of the cold elbow should not be made. The plane degree of the cold-formed tube should be checked after the crackle, mechanical damage and the bending angle error of the bending angle less than 2% of the bending angle of less than 2%. The plane degree of the cold-formed tube is not more than 3mm.
方管价格综合指数看,最低点是2012年9月7日的134.7点。而从近五年看,2008年金融危机过后,钢价指数曾经的最低点为2009年4月14日的129.5点。而今年5月31日钢价指数已经下跌至138点,与近几年的低点还有差距。每周清洁空气过滤器一次,在风沙大的地区,每天清洁一次。每工作250小时或每消耗8500升燃料后,更换发动机机油和过滤器。每250小时,检查电池(并清洁触点)。每周给焊管导辊上油脂。每周给所有液压缸轴承上油脂。每周给定位轴承和定位杆上油脂。每周用加油泵给定位座上摇杆轴臂轴承上油脂。每天检查曲柄轴箱、液压油、液压回路,检查是否有漏油处。

The lowest point is the 134.7 point in September 7, 2012. In the past five years, after the financial crisis in 2008, the lowest point of the steel price index was 129.5 in April 14, 2009. And in May 31st this year, the steel price index has dropped to 138 points, which is still different from the low points in recent years. Clean the air filter once a week and clean it once a day in the windy and sandy area. After working for 250 hours or 8500 litres of fuel per liter, replace engine oil and filters. Check the battery (and clean the contacts) every 250 hours. Grease the pipe guide roller every week. Grease the bearings of all hydraulic cylinders a week. Grease the positioning and positioning rods every week. Use grease pump to grease the rocker shaft arm bearings on the positioning block every week. Check crankcase, hydraulic oil and hydraulic circuit every day to check whether there is oil leakage

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