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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.
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
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
Has rich experience in steel pipe processing, can be customized according to customer requirements according to the drawing and sample processing, assist in the development of new products.
Product Description
.BASIC INFORMATION
EN 10217 HOLLOW SECTION
Standard: EN 10217
Grade: P195GH, P235GH, P265GH
Outside diameter:20-660MM Wall Thickness: 1.3-16MM
The Wall Thickness Tolerance: ±5%
Length: normally 5.8m, 6m, 12m or as your required
Surface Treatment: Bare Finish, Painting, Oiling, Galvanzation, 3PE, FBE coated......
CHEMICAL COMPOSITION
Chemical composition(cast analysis)% | ||||||
Steel Grade | C | Si | Mn | P | S | |
P195GH | ≤0.13 | 0.35 | ≤0.70 | 0.025 | 0.020 | |
P235GH | ≤0.16 | 0.35 | ≤1.20 | 0.025 | 0.020 | |
P265GH | ≤0.20 | 0.40 | ≤1.40 | 0.025 | 0.020 | |
PHYSICAL REQUIREMENT
Mechanical properties for wall thickness T≤16 | ||||||
Steel Grade | Tensile properties at room temperature | |||||
Upper yield strength MPa | Tensile strength Mpa | Elongation % | ||||
longitudinal | transverse | |||||
P195GH | 195 | 320-440 | 27 | 25 | ||
P235GH | 235 | 360-500 | 25 | 23 | ||
P265GH | 265 | 410-570 | 23 | 21 | ||
DETAILED INFORMATION
The EN 10217 standard defines the technical delivery conditions for welded steel pipes for pressure applications, of which the "HOLLOW SECTION" steel pipe is an important part.
1.Material and specification
EN 10217 hollow section steel pipes are usually made of non-alloy steel or low-alloy steel with good mechanical and weldable properties.
Common steel grades include P195GH, P235GH and P265GH, which have different yield and tensile strengths to meet the needs of different application scenarios.
The diameter range is usually 406-1420 mm, and the wall thickness is 10-50 mm.
2.Manufacturing process
Manufactured by longitudinal submerged arc welding (LSAW) technology, it ensures the quality of the weld and the overall performance of the steel pipe.
The production process includes pretreatment of steel plates, forming (such as JCOE or UOE processes), welding, weld treatment, heat treatment, inspection and anti-corrosion treatment.
3.Quality control
Strict non-destructive testing (such as ultrasonic testing, X-ray testing) ensures that the weld is free of defects.
Mechanical properties tests (such as tensile tests, bending tests) verify the strength and toughness of the steel pipe.
Hydraulic test verifies the tightness and pressure resistance of the steel pipe.
4.Surface treatment and corrosion protection
Provide a variety of surface treatment methods, such as sandblasting, painting, hot dip galvanizing, three-layer polyethylene (3PE) anticorrosion, etc., to adapt to different environmental needs.
Application
1.Pipeline transport
It is widely used in long-distance pipelines for oil, gas and water, especially in high pressure and low temperature environments.
2.Pressure vessel
It is suitable for pressure vessels in high or low temperature environment, such as boilers, storage tanks, etc.
3.Architecture and structure
Used for supporting parts in building structures, such as Bridges, towers, etc., because of their high strength and corrosion resistance.
4.Ocean engineering
In offshore projects such as offshore platforms and submarine pipelines, EN 10217 hollow section steel pipes are widely used because of their good corrosion resistance and high pressure resistance.
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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