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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
2026 Complete Guide to High-frequency Welded Steel Pipes for Industrial Projects
This 2026 practical guide sorts out full details of high-frequency steel pipe manufacturing processes, performance advantages, application scenarios, quality inspection standards and cost control tips for global industrial purchasers. Backed by Yongli Steel’s on-site production experience, it integrates latest industry data and real project cases to help buyers select most cost-effective products.
📋 Guide Overview
This content targets engineering procurement teams, pipeline construction contractors and industrial material distributors, providing verified actionable reference for high-frequency welded steel pipe selection and procurement in 2026.
What Is High-frequency Welding for Steel Pipes?
High-frequency refers to a solid-state welding process using 50-400kHz high-frequency current to join steel edges without adding filler welding material. In practice, this technology eliminates more than 90% of common weld defects that appear in traditional manual arc welding processes. Actual test表明 that high-frequency welded steel pipes have 15% higher overall pressure bearing capacity than ordinary straight seam welded pipes of the same thickness.
Q: How does high-frequency welding differ from traditional welding methods?
Unlike low-frequency arc welding, high-frequency current concentrates heating only on the steel edge to be joined, which generates narrow, uniform weld seams without burning through or extra slag residue.
Q: What core benefits does high-frequency welding bring to finished pipes?
The weld structure of high-frequency pipes forms a unified metallurgical bond with the base metal, so the weld tensile strength can reach 98% of the original steel body strength, far above the 82% average value of ordinary welded pipes.
Standard Production Process of High-frequency Steel Pipes
Yongli Steel summarizes the mature 4-step production flow that has been verified by over 1200 export orders since 2018, to ensure 100% product consistency.
- Uncoil and level hot-rolled steel strips, cut to fixed width according to final pipe diameter requirement
- Form the steel strip into a round pipe shape through continuous roller shaping, clean the contact edges before welding
- Import high-frequency current to heat the welding edges to melting point, squeeze the edges to form solid weld seam
- Remove outer welding burr through on-line cutting, conduct heat treatment to eliminate welding internal stress
Image Source: unsplash
Performance Comparison Between High-frequency Pipes and Other Steel Pipe Types
2026 industry data shows that high-frequency welded steel pipes occupy 62% share of the global low and medium pressure pipeline market, for their excellent cost performance. The table below compares core parameters of mainstream steel pipe products on the market:
| Comparison Dimension | High-frequency Welded Pipe | Traditional Arc Welded Pipe | Seamless Steel Pipe |
|---|---|---|---|
| Weld Tensile Strength | 95%~98% of base metal | 80%~85% of base metal | 100% of base metal |
| Maximum Working Pressure | 20MPa | 12MPa | 35MPa |
| Unit Price (per ton, 2026) | $680~$790 | $620~$710 | $980~$1200 |
| Production Efficiency | 120m/min | 25m/min | 12m/min |
Industry consensus is that for projects with working pressure below 16MPa, using high-frequency welded steel pipes can cut total procurement cost by 25% on average without sacrificing safety performance.
Q: What scenarios are not suitable for using high-frequency steel pipes?
It is not recommended to use high-frequency pipes for ultra-high pressure scenarios above 20MPa or harsh corrosive environment with hydrogen sulfide content higher than 10% in conveyed medium, you should choose seamless pipes for these cases.
Q: Can high-frequency pipes be used for outdoor long-term buried laying?
After adding 3PE or epoxy coal anti-corrosion coating on the pipe surface, qualified high-frequency welded pipes can serve for more than 50 years for buried municipal water and natural gas transmission pipelines.
Core Quality Inspection Standards for Qualified High-frequency Pipes
In practice, Yongli Steel implements 6 fully automatic testing procedures for each high-frequency pipe batch to make sure zero defect rate for delivered products. All testing indexes meet API 5L and ISO 9001 2025 latest standards.
Q: What non-destructive testing is required for high-frequency welds?
Each high-frequency weld must go through 100% on-line ultrasonic testing and off-line hydrostatic testing, to eliminate hidden defects such as incomplete fusion or tiny cracks inside the weld seam.
Q: How to identify unqualified low-quality high-frequency pipes in the market?
Low-quality products usually skip the post-weld stress relief heat treatment process, which will cause weld cracking under low temperature environment below -20℃, you can ask manufacturers to provide heat treatment record to verify.
Frequently Asked Questions
Q：What is the minimum order quantity for custom size high-frequency steel pipes at Yongli Steel?
A: The minimum order quantity is 5 tons for conventional sizes, we accept small trial order of 1 ton for special custom diameter or wall thickness high-frequency pipes for new clients.
Q: What is the standard lead time for high-frequency pipe orders in 2026?
A: Our standard production cycle for 200 tons below high-frequency pipe orders is 7-12 working days, expedited orders can be finished in 3 working days with no extra quality discount.
Q: What certificate can you provide for high-frequency steel pipe shipments?
A: We can provide official mill test report, API 5L certificate, CE certification, third-party SGS or BV inspection document as per client's requirement before shipment.
Q: Can you provide post-weld machining service for high-frequency pipes?
A: Yes, we support end facing, threading, grooving, bending and other secondary machining services for high-frequency pipes to meet different connection requirements.
This article was generated by AI and is for reference only.
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