The most practical solution for flange corrosion

The ideal solution should be a combination of excellent corrosion protection and simple construction procedures, and should be suitable for all sizes and shapes of flanges, and easy to operate bolts during maintenance. Hebei Haihao Group as a professional flange supplier, our proposed solutions include:

Maintain paint solutions

Maintenance paint is a hard film that can be directly bonded to the substrate, usually epoxy or polyurethane coating. Flange has a lot of edges and edges, because of the edge thinning effect, the conventional paint system is difficult to effectively cover the edge. While the thickening coating will solve the problem of edge protection, it will also seal the fasteners so that they cannot be removed for subsequent maintenance. In addition, the coating can be damaged when operating the bolts and must be repainted after repair.

Mechanical solutions

Mainly through the protective cover and fixture sealing flange and flange gap, usually stainless steel or plastic material with rubber seal strip. This type of protection is less flexible and requires storage of enclosures or clamps that perfectly match flanges of various sizes.

Tape or semi-solid anti-corrosive belt solution

A roll – like packing tape (such as a grease tape, wax or elastic polymer wrap) is protected by wrapping around the surface of the substrate. Due to the good water resistance of semi-solid polymer, this protection method can provide reliable anti-corrosion protection.

However, if the flange shape is complex, the material is time-consuming and difficult to construct. When the bolt needs to be disassembled and assembled, the material is relatively soft and convenient for cutting, but it is difficult to re-seal and restore the original protection after disassembling and assembling, so it generally needs to be re-constructed.

Hot melt plastic solutions

Hot melt plastic is essentially a waxy, fusible polymer that is heated at high temperature and sprayed onto the surface of the substrate by professional hot melt equipment. The advantage of this type of protection is that it can be remelted and reused, saving costs. But this method also needs hot work, professional equipment and construction services, although can be reused, but not easy to open and seal during maintenance.

Polymer bag solution

The sealing bag can completely wrap the flange and is composed of low permeability polymer, corrosion inhibitor vapor and desiccant. It is easy to install, but the ends of the bag are sealed only with tape instead of a durable mechanical bond. There is a large area of steam space inside the bag, which tends to collect a lot of water, and the corrosion inhibitor will be consumed over a period of time.

Although the above scheme can play a certain anti-corrosion protection role, but there are still some defects in the construction, inspection and maintenance, we need to explore and develop effective solutions to provide long-term, comprehensive protection for the flange. If you have a better solution to the flange corrosion Suggestions, welcome to leave a message and exchange.