2015年2月20日星期五

Pipe cutting

Pipe cutting
(1) with a special cutting machine sawing or cutting pipes and other equipment, and definitely not broken with solvent (such as flame cutting) or cutting wheel;
(2) the cut should be smooth, flat section is not greater than 1 mm, and the tube is not greater than the vertical axis of the 1 degree;
(3) remove the chips and burrs with a file, scraper and so on;
(4) with clean compressed air or other means to remove the tube attached debris and rust;
Tube bending
(1) with cold-formed pipe bender, not bending (large diameter pipe elbow alternatives available ELBOW), bend radius is more than four times the diameter;
(2) ovality (path length change) bend diameter of less than 10%, and can not appear wrinkles;
(3) If there are joints bend pipe end, there should be a straight pipe the pipe end Ups for home is connected, in order to avoid affecting the installation;
Welded pipe and industrial ups power supply
(1) using the GTAW or TIG welding after filling back arc. When the pressure exceeds 21mpa, should also inside the tube through 5l / min argon;
(2) pipe wall thickness> is 2mm, the outer should be cut 35 ° bevel and stay at 3mm gap counterparts; the tube wall thickness ≤2mm, not cut groove, leaving their counterparts at 2mm gap;
(3) When the counterpart of the tube axis must coincide, the wrong side of the wall thickness of less than 15%, the skew of less than 1: 200
 

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