In this passage, i would like to introduce the differences between traditional steel navigation buoys with polyethylene buoys. There will be four parts in this passage:

1, Introduction of the buoys, Steel navigation buoys and polyethylene buoys.

2, The advantages and disadvantages of steel navigation buoys.

3,  The advantages and disadvantages of polyethylene buoys.

4, The services we would like to offer.

A buoy is a floating object that moored the bottom of the water, and it can drift with the waves of the water. which have many purposes, such as special marker buoys, safer water marker buoys, lateral buoys, isolated danger buoys or mooring buoys. they can be divided into different kinds according to the color and the top mark. for example, if a buoy with top mark of a can shape in green or red color, it must be a lateral buoy. Buoys are often required in areas of environmental singificance, where pristine, important, or at-risk marine habitats are present.

A steel navigation buoy is a buoy with a steel hull, which the float and the tail pipe are made of CCBS hull structural steel by welding,and the main components of the steel buoys are the float, the tail paipe, the lamp stand and the ballast.  the color and the depth of the steel  can be customized according to the requirement of customer.  what's more. the lamp stand  is composed of hot-dip galvanized steel pipe by welding, with a good anti-corrosion performance.

A polyethylene buoy is made of pure virgin polyethylene with UV-Stabilised, we use the latest technology of rotational moulding. polyethylene buoys are with high performance and high visibility. we use low density polyethylene primary color material as the floating body material, while sandblasting and painting process are not necessary during the production.

The advantages of steel navigation buoys  are their high strength and easy production.  so they don't deform easily when they were hit or damaged. we devided the float into four sealing cabins, if two of them are damaged and water is entered, and the buoy is still floating and will not sink in the water. because buoys are often required in areas of environmental singificance, where pristine, important, or at-risk marine habitats are present, so they are now widely used in many area especially in harsh condition. what's more, steel navigation buoys are easy to produce, employing cutting and welding techniques to creat a shape, which are quite popular in buoys factory. However, The biggest disadvantage is that the hull of the buoy is made of metal, so it might lead to water pollution. and we have to spend a lot to maintain it keep working. and it is hard to handle due to the heavy weight. 

The advantages of polyethylene buoys are as below: 1)high visibility because of the LLDPE material, so they are with bright color;2) light weight make them are easy to handle;3) low maintenance, because the plastic are more resistant to the elements than steel and do not require painting;4) UV stabilized polyethylene, so they do not easy to crack  and discolored. 5) low cost, because they require less investment for maintenance and have a longer lifetime than steel buoys. The disadvantage of polyethylene buoys is they are not as strong as steel buoys. so they can not suitable for some harsh conditions.

The services we would like to offer: 1) Site assessments to find the most suitable location. 2) Buoy selection, we will choose the exact buoy according to the customers requirement. 3) Buoy design, we will design the buoys for customers by communicating with the customers.This process is available for both shallow and deep water buoy applications 4) Some advices about the suitable marine lanterns  and the selection of the suitable anchor chain. 5)  Installation supervision, maintenance plans and services.