In the fields of high-pressure long-distance oil and gas pipelines, submarine pipelines, urban core pipeline networks, and large-scale steel structure projects, spiral welded pipes, due to their shortcomings such as long weld seams, uneven stress distribution, and low pressure-bearing limits, can no longer meet the stringent standards of high-end cross-border projects. Currently, high-end infrastructure projects worldwide all prefer large-diameter straight seam submerged arc welded pipes (LSAW) using the JCOE process as the primary material, and it is also the core pipeline type specified by international EPC projects and overseas energy owners.
Many overseas buyers easily confuse UOE and JCOE processes: Traditional UOE production lines require extremely high equipment investment, have rigid specification switching, and are only suitable for mass production of a single specification, making them unsuitable for the multi-specification, customization, and mixed thick and thin wall requirements of modern engineering. In contrast, the JCOE progressive forming process, with its core advantages of high flexibility, high precision, low residual stress, and strong adaptability to thick walls, has become the mainstream technology for high-end LSAW pipe manufacturing globally and a benchmark process for Chinese exported pipes.
Hebei Haiganwei HSPC has fully introduced and optimized the JCOE automated production line, adopting a mature process system of "step-by-step multi-point stamping forming + precise seam joining + double-sided submerged arc automatic welding + mechanical full pipe diameter expansion + full-line non-destructive testing", which completely solves common industry problems such as poor roundness of large-diameter thick-walled steel pipe forming, many weld defects, stress concentration, and large dimensional deviation.
From the perspective of core technology principles, the Haiganwei JCOE process uses multi-point progressive bending to uniformly shape the steel plate, resulting in extremely low residual stress in the pipe body. The pipe's roundness, straightness, and end-face flatness precision far exceed industry standards, effectively avoiding the risks of deformation, cracking, and leakage after pipeline construction. The double-sided submerged arc automatic welding technology produces full weld formations, uniform penetration, few impurities, and extremely low porosity. Its welding stability surpasses conventional welding processes, making it suitable for complex and harsh operating conditions such as high pressure, low temperature, deep burial, and near-shore corrosion.
In terms of quality control, Haiganwei has established a closed-loop quality control system covering the entire process: from spectral re-inspection and mechanical property testing of raw steel plates upon arrival at the factory, to JCOE forming size calibration, automatic tracking welding of weld seams, mechanical expansion and stress relief of pipe bodies, and then to 100% AUT ultrasonic flaw detection, X- ray inspection, hydrostatic pressure test of the entire pipe, and full inspection of wall thickness dimensions, every steel pipe can achieve traceability of furnace batch number, query of process, and full coverage of test reports.
To meet the needs of overseas corrosion protection projects, Haiganwei has established standardized corrosion protection production lines, strictly adhering to the ISO21809 international corrosion protection standard to produce FBE single-layer epoxy powder coatings, 3LPE three-layer polyethylene coatings, and 2PE double-layer coatings for pipelines. The corrosion protection layers exhibit strong adhesion, acid and alkali resistance, aging resistance, and soil corrosion resistance, ensuring stable service for buried pipelines for over 30 years. They are perfectly suited for overseas long-distance pipelines, swampy saline-alkali land, and highly corrosive near-shore environments.
With its leading JCOE process and stringent quality control, Haiganwei can stably produce high-strength pipeline pipes such as API 5L X70 and X80. These pipes exhibit excellent low-temperature toughness and can adapt to complex construction environments in cold regions, polar regions, and mountainous areas. They are widely used in high-end applications such as cross-border oil and gas trunk lines, urban pipeline networks, bridge load-bearing structures, offshore wind power jackets, deep-sea pile foundations, and high-pressure fluid pipelines for coal chemical industry.
For overseas engineering procurement parties, choosing JCOE -LSAW steel pipes is not only about choosing high-quality pipe materials, but also about choosing a complete engineering solution with mature technology, comprehensive testing, compliant documentation, stable delivery, and professional after-sales service, effectively reducing risks such as project rework, failure to pass acceptance, and project delays .
Frequently Asked Questions about Engineering Procurement
1 : What are the core differences between LSAW straight seam submerged arc welded pipe and spiral welded pipe, and what projects are they suitable for respectively?
A: LSAW straight seam submerged arc welded pipes have shorter weld seams, lower residual stress, stronger pressure resistance and corrosion resistance, and better structural stability, making them suitable for national key projects such as high-pressure oil and gas trunk lines, submarine pipelines, hydrogen energy transmission, and acidic oil and gas fields; SSAW spiral welded pipes have longer single-piece lengths and lower costs, but are only suitable for municipal projects such as low-pressure water transmission and gas branch lines, and cannot be used for high-pressure acidic oil and gas trunk lines.
2 : Can LSAW steel pipes from Hebei Haiganwei be used for hydrogen transportation and carbon capture projects?
A: Absolutely. Haiganwei is a participating unit in the drafting of the "Technical Specification for Design of Pipes for Long-Distance Hydrogen Pipelines". It has mature mass production technology for hydrogen pipelines and supercritical CO₂ pipelines, and specifically addresses industry pain points such as hydrogen embrittlement, hydrogen leakage, and low-temperature cracking. It has complete supply cases of hydrogen energy pipelines to large overseas urea bases. With dual certification of technology and performance, it is a high-quality supplier of special pipelines for new energy in China.
3 : If the pipeline is used for export projects, can the manufacturer provide a complete set of international certification documents?
A: Hebei Haiganwei can provide a complete set of compliant qualification documents, including API 5L, GB/T9711, CE-PED pressure equipment certification, CE-CPR, Russian EAC, GOST, DNVGL classification society certificates, and Class A pressure pipeline production qualification. All documents are legitimate and verifiable, and can be directly used for overseas customs clearance and international EPC project completion acceptance.
4 : Which type of pipe should be selected for acidic oil and gas fields and highly corrosive working conditions?
A: For sulfur-containing and water-containing acidic media, the sulfur-resistant LSAW straight seam submerged arc welded pipes that have passed HIC/SSC testing by Haiganwei are the preferred choice; for highly corrosive fine chemical and brine transportation scenarios, bimetallic composite welded pipes are recommended; for general underground anti-corrosion needs, 3LPE/3LPP anti-corrosion welded pipes can be selected. Multiple solutions are available to adapt to different corrosive conditions, effectively extending the service life of pipelines.
5 : Does it support production of non-standard sizes, special steel grades, and customized anti-corrosion processes?
A: We support customization of all categories. We can customize special wall thicknesses, extended lengths, high-grade steel pipes such as X70/X80, and special alloy processes as needed. We can also customize multi-layer anti-corrosion structures and drag-reducing coatings on the inner wall of pipes. We can provide exclusive production and delivery solutions based on design institute drawings, overseas standards, and special project conditions.
[Official Contact Information for Haigway]
Official website: www.haiqianwei.com
Alternate website: www.hspc.cc
Email: [email protected]
Sales Hotline: +86 131 1177 7118
Disclaimer: This article is for industry exchange and reference only and does not constitute investment or cooperation advice.
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