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Galvanized steel products
Strong Strength, High-Quality Products
Galvanized steel products

Hot-dip galvanized steel pipe is widely used in construction, machinery, coal mine, chemical industry, electric power, railway vehicles, automobile industry, highway, bridge, container, sports facilities, agricultural machinery, petroleum machinery, mining machinery, greenhouse construction and other manufacturing industries.

Galvanized Steel Pipe Application

Hot-dip galvanized steel pipe is widely used in construction, machinery, coal mine, chemical industry, electric power, railway vehicles, automobile industry, highway, bridge, container, sports facilities, agricultural machinery, petroleum machinery, mining machinery, greenhouse construction and other manufacturing industries.

Galvanized steel pipe Welded steel pipe with hot dip plating or electrogalvanized coating. Galvanized steel pipe can increase the corrosion resistance, prolong the service life. Galvanized pipe has a wide range of uses, in addition to the pipeline pipe for water, gas, oil and other general low pressure fluid, but also used in the petroleum industry, especially the oil well pipe, oil pipeline, chemical coking equipment of the oil heater, condensate cooler, coal distillation and washing oil exchanger with the pipe, and trestle pipe pile, mine tunnel support frame with pipe.

Galvanized Steel Pipe Classification

1、Hot dip galvanized pipe

Hot dip galvanized pipe is made of molten metal and iron matrix reaction to produce alloy layer, so that the matrix and the coating of the two combination. Hot dip galvanizing is to first pickling the steel pipe. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned by ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent into the hot dip plating tank. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Complex physical and chemical reactions occur between the matrix of hot-dip galvanized steel pipe and the molten bath to form a compact zinc-iron alloy layer with corrosion resistance. The alloy layer is integrated with the pure zinc layer and the steel tube matrix, so its corrosion resistance is strong.
2、Cold galvanized pipe
Cold galvanized pipe is electric galvanized, galvanized amount is very small, only 10-50g/m2, its own corrosion resistance is much different than hot galvanized pipe. Regular galvanized pipe manufacturers, in order to ensure quality, most do not use galvanizing (cold plating). Only small businesses with obsolete equipment use galvanizing, and of course their prices are relatively cheap. The Ministry of Construction has officially announced the elimination of cold galvanized pipes with outdated technology, and it is not allowed to use cold galvanized pipes as water and gas pipes. The galvanized layer of cold galvanized steel pipe is the electroplating layer, and the zinc layer is independently layered with the steel pipe matrix. Zinc layer is thin, zinc layer is simply attached to the steel tube matrix, easy to fall off. So its corrosion resistance is poor. It is prohibited to use cold galvanized steel pipes as water supply pipes in newly built houses.

Galvanized Steel Pipe Specification

Product Name

Galvanized steel pipe

Out Diameter

Pre galvanized:1/2''-4''(21.3-114.3mm). 

Such as 38.1mm, 42.3mm, 48.3mm, 48.6mm or as customer request.

Hot dipped galvanized:1/2''-24''(21.3mm-600mm).

Such as 21.3mm, 33.4mm, 42.3mm, 48.3mm, 114.3mm or as customer request.


Pre galvanized:0.6-2.5mm.

Hot dipped galvanized: 0.8- 25mm.

Zinc coating

Pre galvanized:5μm-25μm

Hot dipped galvanized:35μm-200μm


Electronic Resistance Welded (ERW)

Steel Grade

Q235, Q345, S235JR, S275JR, STK400, STK500, S355JR, GR.B-D


BS1139-1775, EN1039, EN10219, JIS G3444:2004, GB/T3091-2001, BS1387-1985, DIN EN10025, ASTM A53 SCH40/80/STD, BS-EN10255-2004

Surface Finish

Pre-galvanized, Hot dipped galvanized, Electro galvanized, Black, Painted, Threaded, Engraved, Socket.

International Standard



1.Big OD:in bulk 

2.Small OD:packed by steel strips 

3.woven cloth with 7 slats 

4.according to the requirements of customers

Main Market

Middle East,Africa, Asia and some Uropean country and South America, Australia

Country of origin



5000Tons per month.


1. Payment terms : T/T ,L/C 

2. Terms of trade : FOB ,CFR,CIF ,DDP,EXW 

3. Minimum order : 2 tons 

4. Delivery time : Within 25 days.

Factory Display

Factory Display

Tianjin tisco is a one-stop steel pipe supplier for global manufacturers.

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Our steel products are mainly used in chemical industry, petrochemical industry, offshore, seawater pipeline, desalination plant, nuclear engineering, paper and pulp industry.

Oil and GasKuwait is a country of petroleum resources with abundant, oil factory also is very broad, respectively, the oil plant are mainly used for refining oil and oil processing.
MarineSubmarine pipelines carry such things as domestic water, waste water, electrical lines, gas lines, communication lines, and outfall or intake systems.
ConstructionBridge materials with high strength, low cost for selecting the main basis, give priority to with development of the traditional steel and concrete.
EnergyEngineering is mainly aiming at the water pollution and solid waste pollution. using the steel pipe to filtrate in order to improve the quality of water.

Exporting country

We are a well known worldwide supply and export Alloy Steel Plate in following countries:,Italy, Philippines, France,Ireland, Portugal, Gambia, Thailand, Ukraine, United Kingdom, Netherlands, South Africa, Spain, Turkey, Libya, Romania, Puerto Rico, Azerbaijan, United Arab Emirates, Pakistan, Ghana, Slovakia, Germany, Saudi Arabia, Afghanistan, Bolivia, Switzerland, Bangladesh, Taiwan, Oman, Egypt, Greece, Norway, Singapore, Bulgaria, Estonia, Belgium, Yemen, Hong Kong, Ecuador, Sri Lanka, Nepal, Belarus, Finland, Gabon, Iran, Canada, Argentina, Lebanon.


Welcome to Tianjin Tisco. We are a comprehensive enterprise integrating steel trading and processing. We provide one-stop service for global customers. Complete specifications, exported all over the world, factory direct sales, integrity management. Meet all your needs for steel!

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