| Payment Type: | L/C,T/T,D/P |
| Incoterm: | CFR,CIF,EXW,FOB |
| Transportation: | Ocean,Land,Express |
| Port: | Qingdao,Tianjin,Shanghai |
Model No.: Q195 Q235 Q345
Standard: Bs, Gb, Astm, Api
Material: Q195-Q345, A53-A369, St35-St52, Cr-Mo Alloy, 16mn, 10#-45#, Q235, Q345, S235JR, S275JR, SS400, St37-2, St52-4
Section Shape: Round
Place Of Origin: China
Application: Fluid Pipe, Gas Pipe, Oil Pipe, Structure Pipe
Production Process: Cold Rolled
Certification: Bsi, Ce, Api
Surface Treatment: Galvanized
Special Tube: Api Pipe
Whether Alloy: Non-Alloy
Tolerance: ±1%
Category: Seamless Steel Pipe
Processing Service: Bending, Welding, Decoiling, Punching, Cutting
Outer Diameter: 48.3mm, 48.6mm, 60.3mm
Wall Thickness: 2.0-4.0mm
Length: 1-6m or according to customers' requirement.
Technique: Hot Rolled, Cold Rolled, ERW, High-frequency welded, Extruded
| Selling Units | : | Ton |
| Package Type | : | Standard marine packaging, or as required by the customer |
| Picture Example | : |
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Product Introduction
Galvanized Steel Pipe is a kind of Carbon Steel Pipe, mostly Welded Pipe, Galvanized Steel Pipes are divided into cold galvanized steel pipes (electro galvanized steel pipes) and hot-dip galvanized steel pipes. At present, hot-dip galvanized steel pipes are mainly used in fire protection, electric power and highways.
Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for water transmission, gas, oil and other general low-pressure fluids, they are also used as oil well pipes and oil transmission pipes in the petroleum industry, especially in offshore oil fields, as well as pipes for oil heaters, condensing coolers, coal distillation oil washing exchanges of chemical coking equipment, as well as trestle pipe piles, support frames of mine tunnels, etc.
Hot-dip galvanizing (HDG), as referenced is the process of dipping fabricated steel into a kettle or vat of molten zinc.
Hot-dip galvanizing (HDG) is the process of coating iron, steel or ferrous materials with a layer of zinc. This done by passing the metal through molten zinc at a temperature of 860°F (460°C) to form zinc carbonate (ZNC03). Zinc carbonate is a strong material that protects steel and can prevent corrosion in many circumstances. Hot-dip galvanizing can be carried out cheaply and in large batches.
Galvanized Steel Pipe is a Welded Steel Pipe with a hot-dip or electro-galvanized layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially offshore oil fields, and oil heaters and condensation pipes for chemical coking equipment. Pipes for coolers, coal distillation washing oil exchangers, trestle piles, and support pipes for mine tunnels, etc.
Product Specification
| Product name | Hot Sale Prime Quality Galvanized Pipe |
| Material | Q235, Q345, S235JR, S275JR, SS400, A36, St37-2, St52-4, STK400, STK500, S355JR, GR.B-D..... |
| Surface Finish | Pre-galvanized, Hot dipped galvanized, Electro galvanized, Black, Painted, Threaded, Engraved, Socket. |
| Shape | Round /Square /Rectangular |
| Outer Dia (mm) | 21.3-165mm/ 10*10-600*600mm/ 10*20-800*400mm |
| Wall Thickness (mm) | 0.5-2.5 to 1.5-5.5/ 0.4-27mm/ 0.4-27mm |
| Length (mm) | 5800 or 6000/ 6M or customized |
| Surface Treatment | 1)Black, Pre-galvanized |
| 2)Oiled, powder coating | |
| 3)Galvanized as your requirement | |
| PS:Pre galvanized steel pipe: 60-150g/m² | |
| Hot dipped galvanized steel pipe: 200-400g/m² | |
| End Finish | Plain/ beveled ends or threaded with sockets/ coupling and plastic caps. |
| Packaging | Packing in bundle with steel strips; with seaworthy package at the end; could be done with your requirement. |
| Inspection | With Chemical Composition and Mechanical Properties Testing; Hydrostatic Test, Dimensional and Visual Inspection, With Nondestructive Inspection |
| Application | construction pipe, machine structure pipe, agriculture equipment pipe, water and gas pipe, Greenhouse pipe, Building material, Furniture tube, Low pressure fluid tube, etc |
| Others | 1:Special design available according to requirement |
| 2:Pipe can be necked dowm, punching hole on pipe wall. | |
| 3:Pipe fittings, elbows are available. | |
| 4.All production process are under the ISO 9001:2000 strictly |
Galvanized Steel Pipe products are divided into two main categories based on the galvanizing process: 1) pre-galvanized steel pipe; 2) hot-dip galvanized steel pipe.
Pre-galvanized steel pipe (also known as GI pipe) is made from continuous hot-dip galvanized Steel Strip wound and welded, and the galvanizing process takes place before the pipe is formed.
Hot-dip galvanized steel pipe are made from welded steel tubes with a black surface which are degreased, pickled, dipped, dried, and then impregnated with dissolved zinc for a period of time, with the galvanizing step taking place after the tubes are formed.
The main difference between pre-galvanized steel pipe and hot-dip galvanized steel pipe:
1. Different appearance:
The surface of pre-galvanized steel pipe is smooth, bright, even, flat and greenish white.
The surface of hot-dip galvanized steel pipe is rough, which is caused by the hot-dip galvanizing process, and the color is darker and silver-white.
2. Corrosion resistance:
The corrosion resistance of pre-galvanized steel pipe is poorer than that of hot-dip galvanized pipe, firstly, because the Galvanized Strip removes the excess zinc liquid during the production process, resulting in a thinner layer of zinc; secondly, because galvanizing is carried out prior to the formation of the steel pipe, there will be no zinc coverage on the weld seams and cuts of the pre-galvanized steel pipe, resulting in poorer corrosion resistance.
Hot-dip galvanized steel pipe has strong corrosion resistance, and its service life can be up to 20-50 years depending on the use environment and the amount of galvanization.
3. Cost:
Pre-galvanized pipe costs less than hot-dip galvanized pipe.
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