Pre-galvanized steel pipe

What is pre galvanized steel pipe?

Steel tubes that are formed and galvanized afterwards are sometimes referred to as post-galvanized steel tubes, but hot-dipped steel tubes is a more commonly used expression.

Galvanized steel pipe or galvanized steel tube is the most popular type of galvanized steel tube manufacturing because the equipment required for manufacturing is relatively inexpensive and the process is highly scalable. Unlike hot-dip steel tube, the time required for galvanizing the steel sheet is short, so the alloy layer in which iron and zinc are mixed is small and the pure zinc layer is thick.

However, since the zinc applied to the steel sheet is removed by the heat upon welding the pre-galvanized steel tube, re-sealing the exposed steel on the outside surface with zinc thermal spray is a required post-treatment process. This also means that the welding seam on the inside of the steel tube is not galvanized. The sacrificial anode properties of zinc allow for leaving the inner welding seam exposed without reducing the corrosion resistance and longevity of the product.

Pre-galvanization, also known as mill galvanization, involves passing a steel sheet through molten zinc. After this process, the sheet is cut to the desired size and recoiled. During pre-galvanization, a specific thickness of zinc coating is applied to the entire sheet. For instance, pre-galvanized Z275 steel has a zinc coating of 275 grams per square meter.

One notable advantage of pre-galvanized steel compared to hot-dip galvanized steel is its improved appearance. Additionally, it tends to be more cost-effective. Pre-galvanized materials find application in a wide range of products, including conduit, lip, and open channels.

What is the difference between pre galvanized steel and galvanized steel?

As hot dipped galvanization requires dipping the whole steel/metals into the molten vat of zinc, the galvanized steel coming out from this process has a continuous coating over the surface. Pre-galvanizing is performed at the first stage before the sheets are cut into sizes and pieces so the cut edges are not coated.

Production standard: ASTM, JIS, BS, DIN, EN, API, GB

Section type: round, square, rectangular, oval and other special section type.

Pre galvanized Rectangular tubes are the industry standard for fence framework, Contractors, architects, engineers. Architects and landscape architects have used steel fencing to design a variety of shelters, lighting standards and decorative sculptures for street-scapes, parks, bus and light rail stops, shopping centers, malls, sports stadiums, office buildings, parking lots and other facilities. Steel fence post are carefully designed with clean lines, structural integrity and ease of installation. These fences are available in variety of heights and widths in multiple configurations.

British Standard (BS1387-85) Thin thickness pipe specification

Normal steel pipe size

Pre-galvanized steel pipe application

Pre-galvanized steel pipes are used in the following fields, steel structure, build structure, guard rail, fence, metal furniture etc. our products are exported to about 50 countries in the world, we get a lot of recognition from many customers since our good quality and service.

Delivery Special Welded Tubes

Special welded tubes, often used in critical industrial applications, require careful handling and transportation to ensure they reach their destination in optimal condition. These tubes may vary in size, material, and specifications, making their proper delivery essential.