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• Release time：2025-02-11 13:38
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【概要描述】The high-precision steel pipe produced by pipe welding machine is widely used in modern industry, and its production process and quality control requirements are strict. The following is a summary of the relevant technical points and application scenarios: 1. The characteristics of high-precision steel pipe High dimensional accuracy: small outer diameter, wall thickness tolerance (usually up to ±0.05mm), low ellipticity. Excellent surface quality: smooth weld without burrs, surface finish Ra≤0.8μm. Stable mechanical properties: weld strength close to the base material, uniform compressive/tensile properties. Applicable materials: stainless steel (304/316L), carbon steel, alloy steel (such as API series), etc. 2. Core production process (1) Type of pipe welding machine High-frequency welding (HFW) : high efficiency, suitable for medium thin wall pipe (Φ10~Φ600mm), need to cooperate with precision forming unit. Laser welding: small heat affected zone, narrow weld (0.1~0.3mm), suitable for ultra-thin walls (such as 0.3mm) or special alloys. TIG welding: For high alloy steel or thick wall pipe, higher weld purity. (2) Key process links Forming process: multi-roll continuous cold forming, dynamic adjustment of roll parameters to compensate for rebound. Welding control: High frequency welding: precise control of current frequency (100~400kHz) and extrusion amount. Laser welding: focus position accuracy ±0.05mm, real-time depth monitoring (such as CCD vision). Online detection: Eddy current inspection (ET) : Detection of surface cracks. Ultrasonic inspection (UT) : detection of internal defects (sensitivity Φ0.5mm equivalent flat hole). Laser caliper: Outer diameter closed loop control (accuracy ±0.01mm). 3. Post-processing technology Heat treatment: bright annealing (hydrogen nitrogen protection atmosphere) to eliminate stress, hardness fluctuation ≤3HRC. Straightening: multi-roll precision straightening, straightness ≤0.5mm/m. Surface treatment: Electrolytic polishing (EP) : For medical/food grade stainless steel tubes, Ra up to 0.2μm. Coating: hot dip galvanizing (zinc layer ≥80μm) or electroless nickel plating (uniform thickness ±2μm). 4. Typical application areas Automobile manufacturing: fuel injection pipe (tolerance ±0.03mm), hydraulic pipe. Semiconductor equipment: Ultra-high clean gas delivery pipe (inner wall EP treatment, particle ≤Class 5). Medical instruments: endoscopic catheter (Φ1~5mm, wall thickness 0.1mm). Energy industry: Instrument tubes for nuclear power plants (SA213-TP347H material, intergranular corrosion test passed). 5. Quality control standards International standard: ASTM A269 (Universal Seamless and Welded Austenitic Stainless Steel Pipe) EN 10305-4 (Precision welded pipes for hydraulic systems) Industry certification: ISO 9001, PED 2014/68/EU (Pressure Equipment Directive). 6. Technological trends Intelligent production: AI algorithm optimizes welding parameters, and the yield is increased to more than 99.5%. Composite process: laser + arc composite welding, both efficiency and quality (speed increased by 30%). Green manufacturing: low energy high frequency power supply (efficiency ≥90%), waste acid recovery ≥95%. Through the above process optimization and strict quality control, the high-precision steel pipe produced by the pipe welding machine can meet the demanding requirements of size, performance and reliability in high-end industrial fields. In actual production, the process route needs to be customized according to the material characteristics and uses, for example, medical tubes need to undergo additional passivation treatment and biocompatibility testing. For more information, please pay attention to the website of Jinyujie Mechanical and Electrical Used Pipe Mill Supplier：www.usedpipemill.com JinYuJie-Used Pipe Mills Supplier（Please click the link→) :second-hand pipe mill