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About us
Tianjin lefin Industrial
TIANJIN LEFIN STEEL GROUP containing Tianjin lefin Industrial Co.,Ltd. 、Tianjin lefin steel import & export Co.,Ltd and Tianjin Shengqifeng International Trading Co., Ltd. -
Products
Steel Pipe Processing
Our main products include 1/2inch to 16 inch ERW PIPE/GI PIPE which has been produced according to BS1387/ASTM A53/EN10219/EN10255/EN10217 Standard -
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Service Capability
Guarantee Quality
Our steel pipes are suitable for oil, natural gas, shipbuilding, chemical industry, water conservancy, electrical, steel structure, construction and other related fields.
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JIS G3444 ERW PIPE
Standard: JIS G3444
Grade: STK 400, STK 490
Description: JIS G3444 is a Japanese Industrial Standard that specifies the carbon steel tubes used for general structural purposes. The standard covers the dimensions, tolerances, and materials of these tubes, which are commonly used in construction, infrastructure, and other structural applications. It ensures that the tubes meet certain quality and performance requirements for their intended use.
Contact: Nina Wang
Whatsapp: 008618892236531
Specification ERW PIPE OD(Outside diameter) 1/2 INCH-24 INCH Wall thickness 1.3-22MM Length 1-14M, normally 6M/12M, also depends on the requirements Surface Treatment Bending, cutting, drilling holes, marking, painting Anti corrosion coating Galvanizing, Black varnish coating, Slight oil painting, Powder coating Chemical element content STK 400 STK490 Carbon (C) ≤ 0.25% ≤ 0.18% - 0.20% Manganese (Mn) ≤ 1.50% ≤ 1.50% - 1.60% Phosphorus (P) ≤ 0.040% ≤ 0.035% Sulfur (S) ≤ 0.040% ≤ 0.035% Physical properties STK400 STK490 Yield strength ≥ 235 ≥ 325 Tensile strength ≥ 400 ≥ 490 Elongation ≥ 20-23% (≤50MM) ≥ 16-19% (＞50MM) Processing process:
1. Raw material preparation: The raw material used for JIS G3444 ERW pipe is typically hot-rolled steel coils or sheets. These raw materials are inspected for quality and surface defects before being processed further.
2. Forming: The raw material is passed through a series of rollers to form a cylindrical shape. The edges of the material are then joined together using high-frequency electric resistance welding (ERW) to create a seam along the length of the pipe.
3. Welding: The welded seam is then subjected to high-frequency electric resistance welding to ensure a strong and durable bond. The welding process is carefully monitored to ensure the quality of the weld.
4. Sizing: The welded pipe is passed through sizing rolls to achieve the desired outer diameter and wall thickness. This step helps to ensure that the pipe meets the dimensional requirements specified in the JIS G3444 standard.
5. Cutting: The pipe is cut to the required length using a saw or a cutting machine. The ends of the pipe are then beveled or chamfered to facilitate welding or joining with other components.
6. Inspection: The finished JIS G3444 ERW pipe undergoes various inspections to check for defects, dimensional accuracy, and compliance with the standard specifications. This may include visual inspection, ultrasonic testing, and hydrostatic testing.
7. Surface treatment: The pipe may undergo surface treatment processes such as galvanizing, painting, or coating to enhance its corrosion resistance and improve its appearance.
8. Packaging and shipping: The finished JIS G3444 ERW pipe is then bundled, packaged, and prepared for shipment to customers or distribution centers.
Overall, the processing process of JIS G3444 ERW pipe involves several critical steps to ensure the quality, dimensional accuracy, and compliance with the standard specifications. Each step is carried out with precision and care to produce high-quality pipes suitable for various applications.
Advantages:
1. Cost-effective: JIS G3444 ERW pipes are more cost-effective compared to seamless pipes because they are easier to produce and require less material.
2. High strength: JIS G3444 ERW pipes have high tensile strength, making them suitable for use in applications where high pressure and stress are involved.
3. Versatility: These pipes can be used in a wide range of applications, including structural, mechanical, and general engineering purposes.
4. Easy to weld: JIS G3444 ERW pipes can be easily welded, making them easy to install and modify according to specific requirements.
5. Durability: These pipes have a long service life and can withstand harsh environmental conditions, making them a reliable choice for various industrial applications.
Application:
JIS G3444 ERW pipe is a Japanese Industrial Standard specification for electric resistance welded carbon steel pipes used for structural construction. Some common applications of JIS G3444 ERW pipe include:
1. Structural support: JIS G3444 ERW pipes are commonly used in construction projects for building structural support such as columns, beams, and frames.
2. Water and gas pipelines: These pipes are also used for the transportation of water and gas in various infrastructure projects.
3. Scaffolding: JIS G3444 ERW pipes are often used in scaffolding systems for construction and maintenance work.
4. Fencing and guardrails: These pipes are used for fencing and guardrail applications in residential, commercial, and industrial settings.
5. Mechanical and general engineering purposes: JIS G3444 ERW pipes are suitable for various mechanical and general engineering applications where high strength and durability are required.
JIS G3444 ERW PIPE
Standard: JIS G3444
Grade: STK 400, STK 490
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Keyword
- Details
-
JIS G3444 ERW PIPE
Standard: JIS G3444
Grade: STK 400, STK 490
Description: JIS G3444 is a Japanese Industrial Standard that specifies the carbon steel tubes used for general structural purposes. The standard covers the dimensions, tolerances, and materials of these tubes, which are commonly used in construction, infrastructure, and other structural applications. It ensures that the tubes meet certain quality and performance requirements for their intended use.
Contact: Nina Wang
Whatsapp: 008618892236531
Specification ERW PIPE OD(Outside diameter) 1/2 INCH-24 INCH Wall thickness 1.3-22MM Length 1-14M, normally 6M/12M, also depends on the requirements Surface Treatment Bending, cutting, drilling holes, marking, painting Anti corrosion coating Galvanizing, Black varnish coating, Slight oil painting, Powder coating Chemical element content STK 400 STK490 Carbon (C) ≤ 0.25% ≤ 0.18% - 0.20% Manganese (Mn) ≤ 1.50% ≤ 1.50% - 1.60% Phosphorus (P) ≤ 0.040% ≤ 0.035% Sulfur (S) ≤ 0.040% ≤ 0.035% Physical properties STK400 STK490 Yield strength ≥ 235 ≥ 325 Tensile strength ≥ 400 ≥ 490 Elongation ≥ 20-23% (≤50MM) ≥ 16-19% (＞50MM) Processing process:
1. Raw material preparation: The raw material used for JIS G3444 ERW pipe is typically hot-rolled steel coils or sheets. These raw materials are inspected for quality and surface defects before being processed further.
2. Forming: The raw material is passed through a series of rollers to form a cylindrical shape. The edges of the material are then joined together using high-frequency electric resistance welding (ERW) to create a seam along the length of the pipe.
3. Welding: The welded seam is then subjected to high-frequency electric resistance welding to ensure a strong and durable bond. The welding process is carefully monitored to ensure the quality of the weld.
4. Sizing: The welded pipe is passed through sizing rolls to achieve the desired outer diameter and wall thickness. This step helps to ensure that the pipe meets the dimensional requirements specified in the JIS G3444 standard.
5. Cutting: The pipe is cut to the required length using a saw or a cutting machine. The ends of the pipe are then beveled or chamfered to facilitate welding or joining with other components.
6. Inspection: The finished JIS G3444 ERW pipe undergoes various inspections to check for defects, dimensional accuracy, and compliance with the standard specifications. This may include visual inspection, ultrasonic testing, and hydrostatic testing.
7. Surface treatment: The pipe may undergo surface treatment processes such as galvanizing, painting, or coating to enhance its corrosion resistance and improve its appearance.
8. Packaging and shipping: The finished JIS G3444 ERW pipe is then bundled, packaged, and prepared for shipment to customers or distribution centers.
Overall, the processing process of JIS G3444 ERW pipe involves several critical steps to ensure the quality, dimensional accuracy, and compliance with the standard specifications. Each step is carried out with precision and care to produce high-quality pipes suitable for various applications.
Advantages:
1. Cost-effective: JIS G3444 ERW pipes are more cost-effective compared to seamless pipes because they are easier to produce and require less material.
2. High strength: JIS G3444 ERW pipes have high tensile strength, making them suitable for use in applications where high pressure and stress are involved.
3. Versatility: These pipes can be used in a wide range of applications, including structural, mechanical, and general engineering purposes.
4. Easy to weld: JIS G3444 ERW pipes can be easily welded, making them easy to install and modify according to specific requirements.
5. Durability: These pipes have a long service life and can withstand harsh environmental conditions, making them a reliable choice for various industrial applications.
Application:
JIS G3444 ERW pipe is a Japanese Industrial Standard specification for electric resistance welded carbon steel pipes used for structural construction. Some common applications of JIS G3444 ERW pipe include:
1. Structural support: JIS G3444 ERW pipes are commonly used in construction projects for building structural support such as columns, beams, and frames.
2. Water and gas pipelines: These pipes are also used for the transportation of water and gas in various infrastructure projects.
3. Scaffolding: JIS G3444 ERW pipes are often used in scaffolding systems for construction and maintenance work.
4. Fencing and guardrails: These pipes are used for fencing and guardrail applications in residential, commercial, and industrial settings.
5. Mechanical and general engineering purposes: JIS G3444 ERW pipes are suitable for various mechanical and general engineering applications where high strength and durability are required.
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Address: Hengtai Road,Daqiuzhuang Town,Jinghai County,Tianjin,China
Mob: +8615122229899(whatspp)
Phone: +86 22 58171905
Fax: +86 22 58171902
E-mail:info@lefinsteel.com
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