Special marks buoys should be yellow and may have a cross/x as a top mark. They can be used extensively in racing, allocated water sports area, swimming and cables.

 Often, they will include working or pictorial representations to inform you of their message.  They are giving you information about an area.  There is no specific shape but they must not be able to be confused with the shape of other marks.

They can be used extensively in racing, allocated water sports area, swimming and cables. 

Here are the main information about our Special marks buoys yellow buoys:

About Welding.

* We use CO2 welding, manual welding,Submerged arc auto welding and automatic welding.

*All weld surfaces should be visually inspected, the weld wave should be uniform, and the edges of the weld should be smoothly transitioned to the base metal,

The shape and size of the weld should meet the requirements of the drawing, and the surface of the weld shall not have cracks, slag, unfused, porosity, weld tumors and arc pits;

*We use ultrasonic flaw detection technique to complete the welding testing 

About Painting.

* We use epoxy paint.

*Shot peening pretreatment will be the first step, and then we will paint the anticorrosive paint within 4 hours after pretreatment.

*We use high pressure airless spraying as much as possible.

* For the parts that are difficult to spray, such as  welding lines and frame edges, we usually  brush one or two layers before formal coating.