The individual quality spiral welded pipe is relatively large, so it is necessary to be placed outdoors. However, this will be difficult to avoid the sun and rain, the rust has been plagued spiral welded pipe storage time and conditions. We need to conduct a comprehensive answer on rust knowledge of spiral welded pipe.
The main method is to use steel wire to brush the surface grinding, cleaning and preheating the spiral welded pipe can remove or loose or tilt of the oxide scale, rust and welding slag. Hand tool rust can reach Sa2 level, power tools rust can be achieved Sa3 level, if attached to a solid steel sruface oxide skin, tools rust effect is not ideal which can not reach the anchor pattern depth of anti-corrosion construction requirements.
Pickling by solvent or emulsion can clean low pressure liquid delivery pipe surface. It can achieve the removal of oil, grease, dust, lubricants and similar organic matter, but it can not remove the steel surface rust, scale, welding flux etc.
General chemical and electrolytic picking are two ways to do, pipeline corrosion using only chemical pickling can descaling, rust, old coatings, and sometimes used as a sand-blasting after reprocessing. Although chemical cleaning the surface can reach a certain cleanliness and roughness, the anchor pattern shallow, and easy to pollute the environment stacking spiral welded pipe.
When the rational use of means to clean rusty pipe and fittings, we guarantee long service in production, creating more production efficiency.
