I. Definition and use
Seamless steel pipe is a kind of tubular steel without welded seams, which has high strength, good toughness and corrosion resistance, and is suitable for a wide range of industrial and construction fields. It is mainly used for the transportation of fluids (such as oil, natural gas, water), the manufacture of mechanical structures, automobile parts, building structures, etc..
II. Specifications and dimensions:
The specifications of seamless steel pipe are usually determined by the outer diameter (OD) and wall thickness (WT). When purchasing, you need to specify the size of the required steel pipe, such as Φ20mm × 2mm (OD 20mm, wall thickness 2mm).
III. Material selection:
Carbon steel: such as Q235, Q345, suitable for general structural parts and fluid transportation.
Alloy steel: such as 20#, 45#, with higher strength and toughness, suitable for machinery manufacturing.
Stainless steel: such as 304, 316, strong corrosion resistance, suitable for chemical industry, food processing and other fields.
IV. Quality standards:
Seamless steel pipe need to comply with relevant national standards (such as GB/T 8162, GB/T 8163) or international standards (such as ASTM A53, A106). When purchasing, you need to confirm that the supplier’s products comply with the required standards.
V. Product characteristics
High strength and toughness: seamless steel pipe has high tensile strength and yield strength, and can withstand large mechanical stress.
Corrosion resistance: depending on the material, seamless steel pipes have different degrees of corrosion resistance and are suitable for many harsh environments.
High dimensional accuracy: Seamless steel tubes produced by cold rolling or cold drawing process have high dimensional accuracy and good surface quality, suitable for precision machining.
Weldless structure: Seamless steel pipe has no welds, reducing welding defects and leakage risks, suitable for high-pressure fluid transportation.
VI. Application Scenarios
Construction industry: used for bridges, high-rise building structural frames, scaffolding and so on.
Machinery manufacturing: used for manufacturing automobile drive shafts, hydraulic cylinder bodies, mechanical parts, etc.
Petrochemical industry: used for transportation of petroleum, natural gas, chemical media, etc., suitable for high-pressure, high-temperature environment.
Automobile manufacturing: used in automobile chassis, transmission system and other components, reduce weight and improve strength.
Decorative engineering: used for railings, handrails, decorative columns, etc., with good aesthetics.