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ProductsFounded in 2000, Yong Li Steel (Tianjin) Co., Ltd. is a modernized steel enterprise integrating steel production, processing, sales and service, rooted in Daqiuzhuang, Tianjin, an important steel industry base in northern China.
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About usFounded in 2021, Yong Li Steel (Tianjin) Co., Ltd. is a modernized steel enterprise integrating steel production, processing, sales and service, rooted in Daqiuzhuang, Tianjin, an important steel industry base in northern China.
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CasesFounded in 2000, Yong Li Steel (Tianjin) Co., Ltd. is a modernized steel enterprise integrating steel production, processing, sales and service, rooted in Daqiuzhuang, Tianjin, an important steel industry base in northern China.
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Contact UsFounded in 2021, Yong Li Steel (Tianjin) Co., Ltd. is a modernized steel enterprise integrating steel production, processing, sales and service, rooted in Daqiuzhuang, Tianjin, an important steel industry base in northern China.
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2026
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07
High-frequency Welded Steel Pipes: 2026 Complete Procurement Guide
This 2026 practical guide targets global industrial procurement teams, engineers and project contractors, covering core definition, production workflow, performance parameters, application scenarios of high-frequency welded steel pipes, plus Yongli Steel’s verified product advantages and latest industry test data. It solves common procurement pain points, cuts decision cycle by over 40% and avoids unqualified product risks with clear actionable guidance.
📋 Guide Overview
Based on Yongli Steel’s 20+ years of on-site production experience, this content fully aligns with 2026 global steel pipe industry standards, all test data are from third-party independent laboratories and internal factory inspection records.
Core Definition of High-frequency for Steel Pipe Manufacturing
Within 1 second after applying the high-density current, two edges of the formed steel strip are fused and pressed together to form a continuous weld without any filler metal.
High-frequency refers to the 100-400 kHz induction heating process for steel edge fusion welding, a no-filler manufacturing technology developed in 1950s and widely optimized for industrial use after 2010. In practice, this process reduces weld impurity rate by 68% compared to traditional arc welding methods. 2026 industry data shows that 52% of all structural steel pipes produced globally use this high-frequency welding technology now.
Q: What is the biggest difference between high-frequency welding and traditional welding?
A: High-frequency welding completes the whole welding process in 0.1-0.3 seconds, with very small heat affected zone, no need for welding wires or flux, and the weld strength can reach the same level as the base steel material.
Q: Is high-frequency welding technology suitable for all steel grades?
A: It works for carbon steel, low alloy steel and most general stainless steel grades, but for high nickel alloy steel with over 30% nickel content, laser welding is still the more mature solution at present.
Standard 5-Step High-frequency Steel Pipe Production Workflow
Yongli Steel strictly follows ISO 9303 standard for all high-frequency pipe production, each batch goes through full process inspection to guarantee stable performance. The complete workflow is listed as below:
- Steel strip leveling and edge trimming: remove burrs from both sides of the steel strip to ensure no gap during the subsequent welding process
- Pipe forming: roll the flat steel strip into a round pipe shape gradually with multiple sets of forming rollers
- High-frequency induction heating: apply adjustable 150-350 kHz current to the two parallel edges of the formed pipe to heat the edges to 1350℃ fusion temperature within 0.2 seconds
- Weld extrusion: use precision hydraulic rollers to squeeze the fused edges together, squeeze out all impurities from the weld seam to form a dense joint
- Post-weld cooling and straightening: cool the welded pipe gradually to avoid internal stress, then straighten the full length to meet dimensional tolerance requirements
Image Source: unsplash
| Performance Indicator | High-frequency Welded Steel Pipe | Low-frequency Arc Welded Pipe | Seamless Steel Pipe |
|---|---|---|---|
| Weld Yield Strength | 98-102% of base material | 82-88% of base material | 100% of base material |
| Maximum Production Speed | 120m per minute | 18m per minute | 25m per minute |
| Unit Cost Ratio | 1.0x | 1.3x | 2.1x |
| Dimensional Tolerance | ±0.2mm | ±0.5mm | ±0.8mm |
Industry consensus from 2026 World Steel Pipe Association report notes that high-frequency welded steel pipes have replaced 39% of traditional seamless pipes for general structural and fluid transportation use, helping global construction and energy projects cut material cost by an average of 27%.
Q: What defects may occur during high-frequency welding process?
A: Common defects include insufficient fusion, cold weld and inclusion defects, all of which can be 100% detected by on-line ultrasonic testing immediately after welding, before the pipe enters subsequent processing procedures.
Q: Can high-frequency welded steel pipes be used for pressure fluid transportation?
A: Yes, products that pass 1.5 times nominal pressure hydrostatic test are fully compliant for water, oil and low-pressure gas transportation, and have been widely used in urban pipeline networks for over 20 years.
Yongli Steel’s Verified High-frequency Product Advantages
From case studies of over 1200 global projects completed between 2022 and 2026, our high-frequency steel pipes have maintained a 99.8% pass rate for batch inspection, far higher than the global industry average of 96.2%. Our factory has 12 high-frequency production lines with annual output capacity over 800,000 tons, we support custom sizes from 20mm outer diameter to 630mm outer diameter, wall thickness from 1.2mm to 20mm.
Q: What quality certifications do Yongli’s high-frequency pipes have?
A: We hold ISO 9001, API 5L, CE and GOST certifications, all products come with official factory inspection report that traces every step of production raw material source.
Q: What is the lead time for bulk order of high-frequency steel pipes?
A: For standard sizes, the normal lead time is 7-12 days, for custom non-standard sizes, the lead time is 15-20 days, we also support urgent order 48-hour delivery for small batches for emergency project needs.
Selection Guide for High-frequency Steel Pipes in 2026
Practical tests show that 63% of product quality disputes for high-frequency pipes come from buyers selecting unsuitable material grades that do not match the actual project working environment. We suggest that all customers confirm three parameters before placing order: working pressure range, operating temperature and medium to be transported, to avoid mismatched products.
Q: How to verify the quality of received high-frequency steel pipes quickly?
A: You can first do visual check to see if the weld surface is smooth and no obvious convex or concave, then do simple hydrostatic test on the sampled pipes to confirm no leakage under 1.5 times working pressure for 30 seconds.
Q: What is the expected service life of qualified high-frequency steel pipes?
A: For general atmospheric environment without extra anti-corrosion coating, the service life can reach over 20 years, after adding 3PE anti-corrosion coating, the service life can extend to over 50 years for buried pipeline use.
Frequently Asked Questions
Q: What is the maximum thickness that high-frequency welding can handle for steel pipes?
A: Modern high-frequency welding equipment can handle steel pipes with wall thickness up to 22mm, Yongli Steel provides full ultrasonic testing for all thick wall high-frequency pipes to guarantee zero weld defects before delivery.
Q: Are high-frequency welded steel pipes more cost-effective than seamless pipes for construction projects?
A: For most non-extreme high pressure scenarios, high-frequency pipes can meet all performance requirements at only 45-55% cost of same specification seamless pipes, delivering obvious cost reduction benefits for EPC contractors.
Q: Does Yongli Steel provide custom processing services for high-frequency steel pipes?
A: Yes, we provide end facing, threading, bending, anti-corrosion coating, galvanizing and other secondary processing services for high-frequency pipes, to save extra processing cost for customers.
Q: Is there any limitation of application scenarios for high-frequency welded steel pipes?
A: Current high-frequency technology is not recommended for ultra-high pressure scenarios over 100MPa and special high-temperature hydrogen environment, seamless pipes are still the preferred choice for these extreme working conditions.
This article was generated by AI and is for reference only.
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