Galvanized Steel Pipe
Galvanized steel pipes are divided into hot-dip galvanized steel pipes and pre-galvanized steel pipes, which are welded steel pipes with a galvanized layer on the surface. Galvanizing can increase the corrosion resistance of the steel pipe and extend its service life.
Hot-dipped galvanized pipes create an alloy layer by reacting molten metal with the iron matrix, thereby combining the matrix and the coating. The process involves pickling the steel pipe to remove surface iron oxide, followed by rinsing in an aqueous solution of ammonium chloride or zinc chloride, or a mixed solution of ammonium chloride and zinc chloride, before immersion in the hot-dip galvanizing bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life. The complex physical and chemical reactions between the base of the hot-dip galvanized steel pipe and the molten coating form a tightly structured zinc-iron alloy layer with strong corrosion resistance. Hot dipped galvanized pipes have a wide range of uses, including not only as pipeline pipes for general low-pressure fluids such as water, gas, and oil, but also as oil well pipes and oil transmission pipes for the petroleum industry, especially offshore oil fields, as well as pipes for oil heaters, condensers, coal tar washing oil exchangers in chemical and coking equipment, and for pile pipes in wharves and support frames in mine tunnels.
Pre-galvanized pipes have a very small amount of zinc coating, only 20-50g/m2, and their corrosion resistance is much lower than that of hot-dip galvanized pipes. Pre-galvanized pipes cannot be used for water and gas pipelines. The zinc layer of pre-galvanized steel pipes is thin and simply adheres to the steel pipe base, making it prone to peeling off, resulting in poor corrosion resistance.
![galvanized steel pipe factory](https://icdn.tradew.com/file/201805/1572838/jpg/8063951.jpg?x-oss-process=image/quality,Q_90)
Hot Dip Galvanized Steel Pipes
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Pre Galvanized Steel Pipes
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Zinc Coating Thickness
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220g/m2 at average
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30g/m2 at average |
30um
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4um
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Steel Pipe Thickness | 1.0mm and above | 0.8mm to 2.2mm |
International Standards
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ASTM A53, BS1387, JIS G3444,
ISO65, EN10255 |
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Pipe Ends | Plain, Beveled, Threaded, Groove | Plain, Threaded |
Length | 6m YOUFA brand gi pipies with stock, 5.5m to 12m( not suitable for small OD ) online produce | 5.8m or 6m usually |
cutting galvanized steel pipe 1m to 5.5m according to PI requirements |
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Why Choose Galvanized Steel Pipes From Youfa ?
Quick Delivery Service:
Youfa has a reliable supply chain and over 20 million tons production capacity to ensure timely delivery, it can be advantageous for businesses with ongoing projects.
Save Logistics Cost:
Youfa has different factories separately near Tianjin port, Shanghai port. And also has factories in Shaanxi which is convenient for railway to Middle Asia countries and in Chengdu which is convenient for highway to Southeast Asia.
China and International Standard Certifications:
Youfa galvanized steel pipe is qualified with GB/T3091 and ISO (9001 14001 18001), UL (ASTM A795), CE (EN10219), and approved by Malaysia, Philippines.
![ISO 9001 Galvanized pipe](https://icdn.tradew.com/file/201805/1572838/jpg/8069169.jpg?x-oss-process=image/quality,Q_90)
![ul fire sprinkler Galvanized pipe](https://icdn.tradew.com/file/201805/1572838/png/7898216.png?x-oss-process=image/quality,Q_90)
![ce Galvanized pipe](https://icdn.tradew.com/file/201805/1572838/png/8011235.png?x-oss-process=image/quality,Q_90)
![iso Galvanized pipe](https://icdn.tradew.com/file/201805/1572838/jpg/8069168.jpg?x-oss-process=image/quality,Q_90)
![](https://icdn.tradew.com/file/201805/1572838/jpg/8063981.jpg?x-oss-process=image/quality,Q_90)
CNAS certified labs
Chemical composition analysis: By analyzing the chemical composition of the steel pipe material, the content of various elements is determined to ensure compliance with relevant standards and specifications.
Mechanical performance testing: including tensile test, impact test, hardness test, etc. to evaluate the mechanical properties such as strength, toughness and hardness of the steel pipe.
Corrosion test: Conduct salt spray test, corrosion performance test, etc. on the steel pipe to evaluate its corrosion resistance.
Dimensional measurement: Accurately measure the outer diameter, wall thickness, length and other dimensions of the steel pipe to ensure that it meets the design requirements.
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