Large diameter seamless steel pipes are mainly produced by hot-rolled large-diameter seamless steel pipes and hot-expanded-diameter seamless steel pipes.
Due to their different manufacturing processes, seamless steel pipes are divided into two types: hot-rolled (extruded) seamless steel pipes and cold-drawn (rolled) seamless steel pipes. Cold drawn (rolled) tubes are divided into two types: round tubes and special-shaped tubes.
The main application of large diameter seamless steel pipe: waterworks, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction. Used for liquid transportation: water supply and drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structural purposes: as piling pipes, as bridges; pipes for wharves, roads, building structures, etc.
KUAIMA steel company has more than ten years of experience in diversified operations and multi-product transactions, involving round bar, ship plate, seamless pipe, plate, coil, wire, bright bar, pipe fittings and a wide range of carbon steel, alloy steel And more product sizes of stainless steel materials, these products we produce meet national and international quality standards, such as ASTM, ASME, DIN, JIS, ISO, etc. The company has 25 production lines for various products, with an annual output of 500,000 tons, and is committed to Provide high-quality steel products and provide supporting services and solutions for global customers. Welcome to KUAIMA steel company.
Grade | Chemical Composition (%) | |||||||
C | Si | Mn | P | S | Ni | Cr | Other | |
201 | ≤0.15 | ≤1.00 | 5.5/7.5 | ≤0.060 | ≤0.030 | 3.5-5.5 | 16.0-18.0 | - |
202 | ≤0.15 | ≤1.00 | 7.5/10 | ≤0.060 | ≤0.030 | 4.0-6.0 | 17.0-19.0 | - |
304 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 8.0-11.0 | 18.00-20.00 | - |
316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 10.00-14.00 | 16.0-18.0 | Mo:2.00-3.00 |
316L | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 10.00-14.00 | 16.0-18.0 | Mo:2.00-3.00 |
321 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 9.00-12.00 | 17.0-19.0 | Ti:5C-0.70 |
410 | ≤0.15 | ≤1.00 | ≤1.25 | ≤0.060 | ≤0.030 | ≤0.060 | 11.5-13.5 | - |
430 | ≤0.12 | ≤1.00 | ≤1.25 | ≤0.040 | ≤0.03 | - | 16.00-18.00 | - |
2205 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.04 | ≤0.03 | 4.5-6.5 | 21.00-24.00 | Mo: 2.5-3.5, |
N:0.08-0.2 | ||||||||
2507 | ≤0.03 | ≤0.80 | ≤1.20 | ≤0.035 | ≤0.02 | 6.00-8.00 | 24.00-26.00 | Mo: 3.0-5.0, |
N:0.24-0.32 |
Grade | Mechanieal Performece |
Hardness | |
201 | HB≤241,HRB≤100, HV≤240 |
202 | HRB≤195, HV≤218 |
304 | HB≤187,HRB≤90,HV≤200 |
316 | HB≤187, HRB≤90 HV≤200 |
316L | HB≤187, HRB≤90 HV≤200 |
321 | HRB≤90, HV≤200 |
410 | HB≤183, HRB≤88 HV≤200 |
430 | HB≤183, HRB≤88 HV≤200 |
2205 | Y.S.≥450Mpa, T.S.≥620Mpa |
2507 | δb/MPa:800-1000,δ0.2/MPa:≥550 |
Product Name | Product specifications of large diameter seamless pipe | |||
Standard | DIN2391, EN10305, ASTM A519, GB/T 3639-200 | |||
Material | 20#, 45#, Q345 27simn 304 316 321 310 2205 | |||
Size | OD: 5-1500mm WT: 0.5-50 Length: 3-9m | |||
Test | Tensile Test, Hydraulic Test, Eddy Current Test etc | |||
Application | hydraulic cylinder, swivel crane, injection machine and so on | |||
Conservation | anti rust oiled inside and outside surface, plastic caps in both ends | |||
Package | bundle with steel strip and knitting strip, or wooden case |
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Seamless steel pipes are mainly used in chemical, petrochemical, marine engineering, seawater pipelines, seawater desalination and other industries, nuclear engineering, paper and pulp industry
oil and gas
Kuaima Steel provides a complete set of equipment and installations for drilling, transportation and storage in the oil and gas industry.
energy
Kuaima Steel serves the entire service cycle of power generation and synchronous activities in design, construction, repair and maintenance.
construction
Kuaima Steel provides comprehensive products and services for infrastructure, bridges, pipelines, etc.
marine
Kuaima Steel is a trusted supplier for subsea to surface operations and shipbuilding operations.
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