- Overview
- Product Description
- Product Parameters
- Product Applications
- Deep Processing
- Packaging & Shipping
- Our Advantages
- Company Profile
- FAQ
Basic Info.
Product Description
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.
| Hot Dip Galvanized Steel pipe | Pre-Galvanized Steel Pipe |
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Size | OD(Outer Diameter) | 10mm-610mm) |
WT(Wall Thickness) | 0.5-2.75mm. SCH10s,SCH40s,STD,XS,SCH80, SCH160,XXS etc. | |
ZINC COATED | 1)Pre-galvanized steel pipe:Z40-80g/m2 2)Hot dip galvanized steel pipe:Z200-520g/m2 | |
Material | Q195,A53 Grade A, SS330,SPHC, S185 Q235,A53 GradeB,A500 GR.A,SS400,S235,ST42.2 Q345 → A500 GR.B,SS500,S355,ST52 | |
Standard | ISO65 | |
Section shape | Round/Square/Rectangular | |
Type | Welded Pipe | |
Technique | Electronic Resistance Welded (ERW ) Electronic Fusion Welded (EFW) Double Submerged Arc Welded (DSAW) | |
Welded Line Type | Longitudinal | |
Ends | 1)Plain2)Beveled3)Thread with Coupling or cap | |
End protector | 1) Plastic pipe cap2) Iron protector | |
Surface Treatment | 1) Bared 2) Black Painted (varnish coating) 3) Galvanized 4) With Oiled 5) 3 PE, FBE, corrosion resistant coating | |
Inspection | With Hydraulic Testing, Eddy Current , Infrared Test | |
Class A test pressure | 4.83MPa-13.10Mpa | |
Applications for Galvanized Steel Pipe
I. Construction field
Galvanized steel pipe is widely used in construction field, mainly used for indoor and outdoor water, gas, oil, heating, cooling and other pipeline systems, such as municipal engineering, water supply, HVAC, air conditioning, firefighting, heating and so on. It has good corrosion resistance, can effectively extend its service life, but also in the construction of a large number of cost reduction.
II. the field of machinery manufacturing
Galvanized steel pipe in the field of machinery manufacturing also has important applications, mainly used in the manufacture of various machinery, equipment and components, such as automobile manufacturing, shipbuilding, electrical power distribution. The products in these fields are often subjected to various corrosion and oxidation because they are in a complicated environment for a long time, and hot-dip galvanized steel pipe can effectively extend the service life of these products.
III. petroleum, chemical industry
Galvanized steel pipe has a wide range of applications in the petroleum, chemical industry, mainly used for oil, natural gas transmission, chemical industry pipe, such as fertilizer, cement and so on. The products in these fields need to have high corrosion resistance and high temperature resistance, and the hot dip galvanized steel pipe has excellent these characteristics.
IV.Other industries
Galvanized steel pipe is also widely used in other industries, such as coal mine ventilation, drainage, mine support, aviation, aerospace, bicycle manufacturing and other fields. Because this type of pipe has the characteristics of pressure, bending and tensile resistance, and is light weight and strong, it is widely used in various fields.
Specific uses of Galvanized pipe: agricultural greenhouse construction, greenhouse steel pipe, canopy steel frame, steel structure plant, mesh frame steel pipe, parking shed, sanitary ware steel pipe, staircase handrails, balcony railing, guardrail, leisure furniture, play equipment, fitness equipment, air-conditioning cooling racks, threading pipe, wire protection pipe, lighting room steel frame, construction sites and so on.
Surface Treatment of Galvanized Steel Pipe
Galvanized steel pipe are generally transported for export by: sea transport and railroad transport. Most of them are transported in containers.
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Shandong Chicago Materials Ltd. is a leading exporter of steel products. We offer a wide range of products including aluminum, steel plates, steel pipes, galvanized steel pipe,steel sheet piles and construction steel such as rebar, beams, rounds and flats. We mainly serve markets in Southeast Asia, the Middle East, Russia, North America and Central Asia.
We have warehouses and processing plants in several cities in China to ensure efficient and timely delivery of products to our valued customers. Our dedicated logistics department handles all aspects of transportation, ensuring the smooth operation of the entire supply chain.
We take pride in the fact that our products have comprehensive certifications that guarantee quality and reliability. Our commitment to providing quality materials at competitive prices sets us apart in the industry.
At Shandong Chicago Materials, we strive to exceed the expectations of our customers by providing superior products and quality services. We are confident in our ability to fulfill the various needs of our customers and look forward to building long-term partnerships with them.
Q:What are the main products our company offers?
A:Our company specializes in steel export business, including aluminum, steel plates, steel pipes,galvanized steel pipe,steel sheet piles, and construction steel, such as rebar, steel beams, round steel, flat steel, and so on.
Q:What is the minimum order quantity for steel products?
A:Minimum order quantities for steel products may vary depending on the specific product. Please contact our sales team for more information on the minimum order quantity of the product required.
Q:Are customized steel products or sizes available?
A:Yes, we can provide customized steel products or sizes according to your specific requirements. Detailed specifications can be provided to our sales team.
Q:What are the shipping options for international orders?
A:We offer a variety of shipping options for international orders, including ocean and air freight. The choice of shipping method will depend on factors such as order quantity, destination and urgency. Our sales team will guide you in selecting the most appropriate shipping option.
Q:How long does it take to deliver steel products?
A:Delivery time is usually 5 working days for less than 500 tons and less than 10 working days for more than 500 tons.
Customized products are estimated based on order quantity, processing difficulty, etc.
Q:Do you offer quality certification for steel products?
A:Yes, we offer quality certifications for steel products, including steel mill test certificates and related product certifications. Upon request, we can provide these certifications to ensure product quality and compliance.