- Ningbo Zhongli bolts manufacturing Co., Ltd. +86-574-86587617
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Supplying high-performance stud bolts and hex bolts to Uzbekistan's oil refineries, gas pipelines, construction projects, and industrial facilities.
Uzbekistan is one of Central Asia's fastest-growing economies, with its industrial sector undergoing rapid modernization. The country's expanding oil and gas sector — centered around the Fergana Valley refineries and the Ustyurt gas chemical complex — creates consistent and high-volume demand for ASTM A193 B7 stud bolts and high-strength fasteners.
The Uzbek government's "New Uzbekistan" development strategy has accelerated investment in energy infrastructure, transportation networks, and manufacturing parks. Projects such as the Kandym Gas Processing Plant, the Shurtan Gas Chemical Complex expansion, and numerous thermal power station upgrades require certified high-temperature, high-pressure fastening solutions that only B7 grade stud bolts can reliably provide.
Key Insight: Uzbekistan's fastener import volume has grown by over 35% in the past five years, driven by major state-led infrastructure and energy projects requiring internationally certified B7 stud bolts and structural fasteners.
As Uzbekistan continues to attract foreign direct investment and expand its industrial base, the need for reliable, certified fastener suppliers with proven export capabilities to the region has never been greater. Zhongli Bolts is positioned as a trusted partner for Uzbek procurement teams, EPC contractors, and industrial distributors.
Understanding the forces shaping fastener demand across Uzbekistan's key industrial sectors.
Uzbekistan's state energy company Uzbekneftegaz is investing billions in upstream and downstream oil & gas infrastructure. Every pipeline flange, pressure vessel, and heat exchanger in these facilities requires certified ASTM A193 B7 stud bolts with 2H heavy hex nuts — driving consistent import demand from certified suppliers like Zhongli.
Tashkent's urban renewal program, the Trans-Caspian corridor development, and new special economic zones across Uzbekistan are generating massive demand for structural hex bolts, high-tensile fasteners, and B7 stud bolt assemblies used in steel structures, bridges, and industrial buildings.
Uzbekistan's government is actively encouraging local procurement and import substitution. While domestic fastener manufacturing capacity is still developing, Chinese suppliers with established export channels, competitive pricing, and full certification documentation — such as Zhongli — remain the preferred source for B7 stud bolts and precision fasteners.
From the Fergana Valley to Tashkent's industrial zones — our B7 stud bolts are engineered for Uzbekistan's most demanding environments.
The Fergana, Alty-Aryk, and Vankor refineries rely on ASTM A193 B7 stud bolts for flanged pipe joints, pressure vessels, and heat exchangers operating at elevated temperatures and pressures. B7 alloy steel provides the tensile strength and thermal resistance required for safe, long-term operation in these critical environments.
Uzbekistan's thermal power stations at Navoi, Angren, and Syrdarya, as well as hydropower facilities on the Syrdarya River, require high-temperature fasteners for turbine assembly, boiler flanges, and structural steel connections. B7 stud bolts with 2H nuts are the standard choice for these high-load applications.
Major infrastructure projects including the Tashkent–Andijan expressway, railway modernization, and new bridge construction across Uzbekistan use structural hex bolts (ASTM A325, DIN6914) and high-tensile fasteners. Our Gr8.8 and Gr10.9 hex bolts meet the EN14399 and ISO4014 standards required by international EPC contractors.
The Shurtan Gas Chemical Complex and Ustyurt Gas Chemical Complex — among the largest in Central Asia — demand corrosion-resistant, high-strength B7 stud bolts for reactor vessels, piping systems, and flange connections. Our products are supplied with full material test reports (MTR) and certifications meeting ASME and ASTM standards.
Uzbekistan's 14+ special economic zones and industrial parks — including Navoi Free Economic Zone and Angren Special Industrial Zone — are home to textile mills, automotive assembly plants, and food processing facilities that require standard fasteners including DIN931/933 hex bolts, socket cap screws, and washers for machinery assembly and structural steel work.
Uzbekistan's railway network modernization — including high-speed rail and freight corridor upgrades — uses heavy hex bolts, track fasteners, and structural connection bolts. Our DIN6914 structural hexagon bolts and ASTM A325 heavy hex bolts are widely specified for rail infrastructure and bridge deck connections throughout the country.
Complete technical data for B7 stud bolts supplied to Uzbekistan's oil, gas, and industrial sectors.
| Parameter | Specification | Standard / Grade | Application in Uzbekistan |
|---|---|---|---|
| Material | Chromium-Molybdenum Alloy Steel (42CrMo) | ASTM A193 Grade B7 | Oil & Gas Flanges, Pressure Vessels |
| Diameter Range | M10 – M48 (3/8" – 4") | ASME B16.5 / ASME B18.2.1 | Refineries, Power Plants, Pipelines |
| Thread Type | UNC, UNF, Metric Coarse/Fine | ASME B1.1 / ISO 724 | All Industrial Applications |
| Tensile Strength | 125 ksi (860 MPa) min. | ASTM A193 B7 | High-Pressure Flanged Connections |
| Yield Strength | 105 ksi (720 MPa) min. | ASTM A193 B7 | Structural & Pressure Applications |
| Hardness | HRC 35 max. | ASTM A193 B7 | Heat Exchanger, Boiler Flanges |
| Temperature Range | Up to 450°C (840°F) | ASTM A193 B7 | Thermal Power Stations, Gas Plants |
| Nut Pairing | 2H Heavy Hex Nuts (ASTM A194) | ASTM A194 Grade 2H | Complete Flange Bolt Sets |
| Surface Finish | Plain, Zinc Plated, Hot Dip Galvanized, Black Oxide | ISO 1461 / ASTM F2329 | Corrosion-Resistant Applications |
| Length | Short sizes to 12ft threaded bars — no length limit | Custom per project | All Uzbekistan Project Requirements |
Ningbo Zhongli Bolts Manufacturing Co., Ltd., founded in 2003, is a professional manufacturer of high-strength fasteners in different specifications for various models. The company covers an area of about 10,000 square meters with a registered capital of 1,500,000 RMB and a total annual productivity of 8,000 tons per year.
The company has set up several sales branches in different provinces in China. Meanwhile, our products are exported to Europe, USA, Middle East, Africa, Southeast Asia, and Central Asia — including Uzbekistan and neighboring countries. We have strong technical ability, complete testing equipment, and a variety of fully automatic multi-station cold and hot heading machines, ensuring reliable and high-quality products for every market.
Our ZYL brand fasteners include structural hex bolts ASTM A325, A490, DIN931, DIN933, EN14399, DIN6914, ISO4014, ISO4017 Gr8.8/Gr10.9/Gr12.9, stud bolts A193 B7 with 2H nuts, hex socket cap screws DIN912, hex flange bolts DIN6921, threaded rods, hex nuts DIN934/DIN6915, plain washers DIN125/DIN126/DIN6916, and spring washers DIN127.
Through scientific management, Zhongli Bolts has obtained ISO9001 Quality Management System certification, EN 15048 CE, EN14399 CE, AD2000, and CE certificates — meeting all international standards required for export to Uzbekistan and the wider Central Asian market.
Read More About UsEvery B7 stud bolt destined for Uzbekistan's oil, gas, and industrial projects goes through our rigorous 8-step manufacturing and quality control process.
Our 10,000 sqm manufacturing facility is equipped with advanced cold forging, hot forging, heat treatment, and precision inspection equipment — ensuring every B7 stud bolt meets the strictest quality standards for Uzbekistan's industrial projects.
Five core strengths that make Zhongli the preferred B7 stud bolt supplier for Uzbekistan's procurement teams and EPC contractors.
A Professional Sales and Technical Team with More Than 20 Years History in high-strength fastener manufacturing and global export.
We Have Our Own Testing Equipment and Laboratory. Our Products Have Initial Inspection, Patrol Inspection, and Final Inspection before shipment.
Our Factory Has Its Own Cold Forged, Hot Forged, and Heat Treatment Equipment — ensuring full in-house process control for B7 stud bolts.
Standard Fasteners in Stock. Non-standard Fasteners Can Be Customized — including special lengths, diameters, and surface treatments for Uzbekistan projects.
We Have Passed ISO 9001, EN 15048, EN 14399, AD2000 and CE Certificates — meeting all international standards for Uzbekistan's regulated industries.
Our physical and mechanical test results meet ISO 898-1 for bolts and ISO 898-2 for nuts. Every batch of B7 stud bolts exported to Uzbekistan undergoes comprehensive quality inspection, with full material test reports (MTR) and certificates of conformance available for each shipment.
We hope to establish lasting business relationships with partners in Uzbekistan and across Central Asia, bringing mutual benefits to both parties.
EN 15048 CE Certification · EN14399 CE Certification · ISO9001 Certificate · AD2000 · CE — All certifications available for Uzbekistan import documentation.
Grasp first-hand information — real feedback from our global clients including buyers from Central Asia and the Middle East.
Whether you are sourcing for an oil refinery in Fergana, a power plant in Navoi, or a construction project in Tashkent — our team is ready to provide fast quotations, free samples, and full certification documentation for all B7 stud bolt and fastener requirements in Uzbekistan.
Beyond B7 stud bolts — our full range of hex bolts, socket cap screws, nuts, and washers supports every fastening requirement across Uzbekistan's industries.
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