English Views: 0 Author: Miss Lin Publish Time: 2025-04-01 Origin: Site
Seamless pipes are produced through processes such as perforation, without welds. It is usually made of high-quality materials such as carbon steel, alloy steel, or stainless steel, and is processed through multiple processes such as high-temperature heating, perforation, and rolling.
For example, in the production of seamless steel pipes, the steel billets are perforated by a perforating machine at high temperatures to form capillaries, and then undergo rolling, sizing, and other processes to finally produce seamless steel pipes.
High strength: Due to the absence of welds, seamless pipes have high overall strength and can withstand significant pressure and external forces. For example, in high-pressure boiler pipelines, seamless pipes can withstand steam pressures of up to tens of megapascals without leakage or other issues due to weld defects.
Good toughness: Seamless pipes have good toughness and can adapt to certain deformations and impacts. In some situations where vibration and impact are required, such as hydraulic systems in mining machinery, seamless pipes can maintain good performance.
Corrosion resistance varies depending on the material: the corrosion resistance of seamless pipes mainly depends on their material. For example, stainless steel seamless pipes have good corrosion resistance and can be used in corrosive environments such as acidic and alkaline environments; The corrosion resistance of carbon steel seamless pipes is relatively poor and requires anti-corrosion treatment.
Seamless pipes are widely used in fields such as petrochemicals, machinery manufacturing, automotive manufacturing, shipbuilding, aerospace, etc. For example, in the petrochemical industry, seamless pipes are used to transport media such as oil and natural gas, ensuring the safe transportation of the media; In mechanical manufacturing, seamless pipes are used to manufacture components such as hydraulic cylinders and air cylinders, which can withstand high pressure and impact.
steel pipe
Production process
Welded steel pipes are made by rolling steel plates or strips into cylindrical shapes and then welding them together. Welding methods usually include high-frequency welding, submerged arc welding, etc. For example, high-frequency welding of steel pipes utilizes the skin effect and proximity effect of high-frequency current to heat the edges of the steel pipe to a molten state, and then completes the welding under pressure.
Low cost: The production process of welded steel pipes is relatively simple, with high material utilization, resulting in lower costs. For example, compared to seamless pipes of the same specifications, the price of welded steel pipes is usually about 20% -30% lower.
High dimensional accuracy: Welded steel pipes have high dimensional accuracy and can meet some situations with strict dimensional requirements. For example, in the construction industry, welded steel pipes are used to make scaffolding, railings, etc., and their dimensional accuracy can ensure the beauty and firmness of installation.
The quality of welds affects performance: The performance of welded steel pipes is to some extent affected by the quality of welds. If the quality of the weld is poor, there may be problems such as weld cracking and missed welding, which can affect the overall performance of the steel pipe. For example, in some highly corrosive environments, corrosion may occur first at the weld seam, leading to steel pipe leakage.
Welded steel pipes are widely used in industries such as construction, petroleum, chemical, natural gas, electricity, machinery, automobiles, shipbuilding, etc. For example, in the construction industry, welded steel pipes are used to make scaffolding, railings, steel structures, etc; In natural gas transportation, welded steel pipes are used to lay natural gas pipelines, which can ensure the safe transportation of natural gas.
Comparison between seamless pipe and welded steel pipe
In terms of strength: The strength of seamless pipes is usually higher than that of welded steel pipes. Seamless pipes have no welds and overall good performance; There may be defects at the weld seam of welded steel pipes, and the strength is relatively low.
In terms of cost: the cost of welded steel pipes is relatively low, the production process is simple, and the material utilization rate is high; The production process of seamless pipes is complex and the cost is high.
In terms of dimensional accuracy: Welded steel pipes have high dimensional accuracy and can meet some situations with strict dimensional requirements; The dimensional accuracy of seamless pipes is relatively low.
In terms of corrosion resistance, the corrosion resistance of seamless pipes and welded steel pipes mainly depends on their materials. Stainless steel seamless pipes and stainless steel welded steel pipes have good corrosion resistance, while carbon steel seamless pipes and carbon steel welded steel pipes have relatively poor corrosion resistance.
