ASTM A53/A53M-20 is a standard specification published by the American Society for Materials and Testing (ASTM), covering tubular, steel, black and hot dip galvanizing, welding, and seamless. Among them, the requirements for hot-dip galvanized steel pipes are clearly specified in this standard. When purchasing imported hot-dip galvanized steel pipes, reference to this standard can ensure that product quality meets international standards.

The national standard "Welded Steel pipe for low-pressure fluid transportation" (GB/T 3091-2015), by TC183 (National Steel Standardization Technical Committee) centralized, TC183SC1 (National Steel Standardization Technical Committee Steel pipe Branch) implementation, the competent department for the China Iron and Steel Industry Association.

EN 10240:2013 is a steel product standard published by the European Committee for Standardization (CEN), which regulates the requirements of galvanized steel pipes with internal and external layers. The standard covers the coating thickness, quality, appearance and other indicators of hot-dip galvanized steel pipe.

JIS G 3442:2007 is a Japanese industrial standard that specifies the requirements for galvanized steel pipes. This standard is mainly applicable to the transport of water, gas, air and other non-pressure general purposes. When purchasing hot-dip galvanized steel pipes made in Japan, it should be ensured that they comply with the provisions of JIS G 3442:2007.

Hot-dip galvanized seamless steel pipe: the amount of hot dip plating is higher, the average thickness of the galvanized layer is more than 65 microns, and its own corrosion resistance is much higher than that of cold galvanized pipe. The galvanized layer of cold galvanized steel pipe is an electric coating, and the zinc layer is independently layered with the steel pipe matrix. The zinc layer is thin, and the zinc layer is simply attached to the steel tube matrix and easy to fall off. Therefore, its corrosion resistance is poor.

Hot-dip galvanized pattern plate composite steel grid plate is widely used in a variety of need for anti-slip, anti-corrosion, bearing capacity of the occasion, such as steel structure platform, stair treads, pipeline support, offshore oil platform, sewage treatment plant and so on. At the same time, due to its unique pattern design, it can also be used as decorative materials, such as building templates, suspended ceilings, flower beds and lawn fences.

Hot-dip galvanized pipe, in order to improve the corrosion resistance of the steel pipe, the general steel pipe is galvanized. Galvanized steel pipe is divided into hot dip galvanized and electric galvanized two, hot dip galvanized galvanized layer is thick, electric galvanized low cost, the surface is not very smooth.

Cold galvanized steel pipe, also known as electrogalvanized steel pipe, is a method of laying a layer of metal zinc on the conductive body using the principle of electrolysis. The zinc layer of cold galvanized steel pipe is thin, simply attached to the steel pipe matrix, easy to fall off, so its corrosion resistance is poor.

Hot-dip galvanized seamless steel pipe: the amount of hot dip plating is higher, the average thickness of the galvanized layer is more than 65 microns, and its own corrosion resistance is much higher than that of cold galvanized pipe. The galvanized layer of cold galvanized steel pipe is an electric coating, and the zinc layer is independently layered with the steel pipe matrix. The zinc layer is thin, and the zinc layer is simply attached to the steel tube matrix and easy to fall off. Therefore, its corrosion resistance is poor.

Galvanized square pipe is a kind of hollow square sectional steel pipe with square section shape and size made of hot rolled or cold rolled galvanized strip steel or galvanized coil as billet by cold bending processing and then by high frequency welding, or the cold formed hollow steel pipe made in advance by hot dip galvanized square pipe processing.

Galvanized rectangular pipeis a kind of hollow square sectional steel pipe with square section shape and size made of hot rolled or cold rolled galvanized strip steel or galvanized coil as billet by cold bending processing and then by high frequency welding, or the cold formed hollow steel pipe made in advance by hot dip galvanized rectangular pipe processing.

The thick wall galvanized pipe is made of carbon steel material, after hot dip galvanized treatment, the surface is plated with a layer of zinc, which can effectively resist the corrosion in the atmosphere, water and soil, and has excellent corrosion resistance.