Measures to ensure the transportation of spiral welded pipes: 

(1) The lifting tools should be inspected before loading the pipes. If it is hook lifting, check whether the hook is a special U-shaped hook. 

(2) Use the rope control during the loading process of spiral welded pipes. Keep the pipe body balanced to prevent the pipe body from shaking and causing collision and damage to the pipe. 

(3) Strengthen the management of pipeline loading and unloading. You should lift and handle pipes carefully when loading and unloading them. It is strictly forbidden to use prying, rolling, sliding, and other methods that damage the anti-corrosion layer to load, unload, and move anti-corrosion pipes to avoid falling and smashing. 

Non-compliance item: Use hook-type spreaders when lifting and unloading bent pipes. Description of the non-conformity: Use a hook-type spreader when lifting and unloading bent pipes, which does not meet the requirements. Hazards of non-conformity: using hook-type spreaders to lift and unload bent pipes is prone to decoupling, which will damage the quality of the anti-corrosion pipes; at the same time, it is harmful to the operation If the safety of personnel and equipment is endangered, special spreaders that will not damage the pipe openings should be used when loading and unloading pipes. Shoulder-type spreaders should be used when lifting double-jointed pipes. Bend pipes should be loaded and unloaded with pipe lifting straps, and the anti-corrosion layer of the pipes should not be damaged.

Reasons and solutions for spiral welded pipes not being round:

After the spiral welded pipe is produced, the cross-section should be close to a circle. The ovality standard requires that the large outer diameter shall not be 1% larger than the nominal outer diameter, and the small outer diameter shall not be 1% smaller than the nominal outer diameter.

When an ellipse appears at the end of a spiral welded pipe, it cannot be connected when welding at the construction site. So what kind of spiral welded pipe is prone to an ellipse? When there is a weld defect at the end of the spiral welded pipe, an ellipse is likely to appear after repair welding. In addition, That is, spiral welded pipes with butt joints are prone to ovals. When encountering repair welding at the pipe end or a large number of repair welding areas on the pipe body and butt joint plates, the ovality of the spiral welded pipe must be carefully measured. If it exceeds the standard, it must be repaired.

We usually repair the elliptical defects of spiral steel pipes by using a jack. We measure the small diameter area and use the jack to jack up the small area for one to five hours. After disassembling the jack, measure whether the ovality is qualified. For ovals that cannot be repaired, the quality inspection must be reported in time to see if the spiral steel pipe is downgraded or scrapped.