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 EN10025 GI pipes combine steel that complies with the European structural steel standard EN10025 with a galvanizing (GI) protection process, making them a widely used material in construction, engineering and other fields.

When facing EN10025 GI pipes of different specifications, you can consider the following aspects to make an appropriate choice:

• Clarify the application scenarios:

First, determine the main purpose of the pipeline. Is it used for building structures, mechanical manufacturing, or for transporting fluids such as water and gas? Different applications have different emphases on the strength, toughness, corrosion resistance and weldability of pipes.

• Assess the usage environment:

What kind of environment will the pipeline be in? Indoor or outdoor? Have you come into contact with corrosive media or been in a high-humidity environment? This is directly related to how much corrosion-resistant galvanized coating you need and whether you need to consider weathering steel as stipulated in EN10025-5.

• Determine mechanical property requirements:

Based on the design load, determine the minimum yield strength (such as S235, S355, S460, etc.) and toughness indicators (such as impact energy requirements for JR, J0, J2, etc.) of the required pipeline.

• Consider the processing technology:

Does the pipe require subsequent processing such as bending and welding? This requires you to pay attention to the carbon equivalent (CEV) of the steel to ensure good weldability and its formability.

EN10025 GI PIPE combines the EN10025 structural steel standard with the Galvanized Iron (GI) anti-corrosion process and is a type of steel widely used in construction, engineering and other fields. 

The core of EN10025 GI PIPE lies in simultaneously meeting the requirements of material performance and anti-corrosion performance.

• Regarding the EN10025 standard:

EN10025 is a European standard for structural steel, covering multiple sections. The commonly used materials for GI Pipe are non-alloy structural steels in EN 10025-2, such as S235JR, S275JR, and S355JR. These grades have good strength and solderability. The standard clearly stipulates the chemical composition of steel (such as carbon equivalent CEV, which affects weldability) and mechanical properties (such as yield strength ReH, tensile strength Rm, elongation).

• Regarding galvanization (GI) :

The galvanized coating is the key to anti-corrosion. There are mainly two ways:

1. Pre-galvanized: Pipes are directly rolled and welded from galvanized steel strips. The zinc coating is usually thin, about 40 to 80 grams per square meter.
2. Hot-dip galvanized: Galvanizing black pipes by immersing them in molten zinc. The zinc coating is relatively thick, usually 200 to 600 grams per square meter, which has stronger anti-corrosion ability and is more durable.

• Other technical details:

For pipes, attention should also be paid to dimensional tolerances, end treatment methods (such as flat ends, bevels for welding, or threaded connections), as well as possible quality inspections such as water pressure tests or eddy current tests.

EN10025 GI PIPE is widely used in: Due to its structural strength and corrosion resistance

•  Architecture and Structural Engineering:

Commonly used in steel frame structures of factories and warehouses, auxiliary components of Bridges, roof trusses, construction scaffolding and guardrails, etc.

• Fluid transportation:

It is used for transporting fluids such as water, gas, and low-pressure steam, and is commonly found in fire protection pipelines, municipal water supply networks, etc.

• In the field of mechanical manufacturing and industry:

It serves as the casing, bracket, and component of the conveying system for mechanical equipment, and is also used in the structure of certain equipment in chemical plants and the mining industry.

• Agriculture and horticulture:

Commonly used as the frame structure for building greenhouse sheds.

Other uses: It can also be seen in substation facilities, traffic sign poles, street lamp poles, etc.

When choosing and using EN10025 GI PIPE, there are several points that need special attention:

1. Clarify requirements:

Select the appropriate zinc coating thickness of the galvanizing type based on the corrosiveness of the usage environment (indoor, outdoor, humid or chemical environment). Select the appropriate strength grade (such as S235JR, S355JR) and wall thickness of the pipe according to the load requirements of the structural design.

2. Pay attention to weldability:

If welding is required, pay attention to the carbon equivalent (CEV) of the steel. A high CEV value may affect the welding performance and increase the risk of cracking.

3. Check quality documents:

When purchasing, request the Material Certificate (MTC) from the supplier to ensure that the product complies with the EN10025 standard and the required galvanized coating requirements. A third-party inspection may be requested when necessary.

4. Storage and Installation:

Try to avoid bumps and damages to the zinc coating. If the zinc coating is scratched, it should be repaired in time with special zinc-rich anti-corrosion paint to maintain the overall anti-corrosion effect.

💎 summary

EN10025 GI PIPE is a steel product that combines performance and anti-corrosion ability, and is suitable for various occasions where structural strength and durability are required.

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