What are marine special coated flanges and lap welded flanges?

Specially painted flange is generally the flange paint on the popular surface. The anti-corrosion performance is similar to that of pipe coating. The special coating of pipeline flange generally refers to the coating of epoxy paint or epoxy powder on the surface of pipeline flange. This depends on the specific requirements of the shipowner.
The purpose of the special coating is mainly to provide special protection for the carrying place when the ship transports or carries some special goods. The anti-corrosion protection of special coating is not only reflected in the protection of the bearing body, but also reflected in the protection of the carrying object sometimes.
Lap welding is to lap the two base materials to be welded together, with the lap distance ranging from 2-20mm, which is different from butt welding. Welding can be fillet welding, spot welding and ultrasonic welding; Determine the amount of overlap as required.
As the name implies, the welding form of lap welding flange is to insert the pipe into the inner diameter of the flange. The welding form is the same as that of flat welding flange, neck flat welding flange, socket welding flange, etc. in our other standards. It is "different from butt welding flange."