- Ningbo Zhongli bolts manufacturing Co., Ltd. +86-574-86587617
- tan@nbzyl.com
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Gabon, situated on the Atlantic coast of Central Africa, is undergoing a rapid industrial transformation under the "Gabon Emergent" strategic framework. As one of the region's largest oil producers and home to massive manganese deposits, the nation relies heavily on robust industrial components. Among these, high-strength fastening solutions—specifically double end studs—are critical elements keeping Gabon's extraction, energy, and infrastructure sectors running safely and efficiently.
From the offshore oil fields of Port-Gentil to the manganese mines of Moanda, heavy-duty machinery operates under extreme stress, high pressures, and highly corrosive marine environments. Standard bolts cannot withstand these conditions. High-tensile ASTM A193 B7, B16, and L7 double end studs are mandatory for pipeline flange connections, mining crushers, and port loading machinery in Gabon.
The Gabonese economy is heavily anchored by its petroleum industry, centered around the maritime hub of Port-Gentil. Offshore drilling platforms, subsea pipelines, and onshore refining facilities (such as SOGARA) operate under high-pressure and high-temperature (HPHT) parameters. Flange joints in these environments require high-tensile ASTM A193 B7 double end studs combined with ASTM A194 2H heavy hex nuts. The double-ended design ensures uniform tension distribution across the flange, minimizing the risk of hydrocarbon leaks that could cause environmental catastrophes or costly operational shutdowns.
Gabon is the world's second-largest producer of high-grade manganese, with primary mining activities clustered around Moanda (operated by COMILOG). Furthermore, massive iron ore projects like the Belinga mine are driving infrastructure developments, including the Trans-Gabon Railway. Heavy mining equipment—such as rotary crushers, vibrating screens, and heavy-haul rail maintenance systems—is subject to continuous vibration and immense mechanical loads. High-strength Grade 8.8 and 10.9 double end studs provide the necessary shear and tensile strength to prevent structural fatigue in these harsh mining operations.
One of the primary challenges for industrial equipment in Gabon is the hot, humid equatorial climate coupled with coastal salinity. Fasteners used in Libreville's Owendo Port expansion or offshore oil rigs face rapid oxidation. As a premier global manufacturer, Ningbo Zhongli Bolts provides specialized surface treatments for double end studs exported to Gabon, including:
Ningbo Zhongli Bolts Manufacturing Co., Ltd. founded in 2003, is a professional manufacturer of high-strength fasteners in different specifications for various models, which is covering an area of about 10,000 square meters, registered capital of 1500,000 RMB, with the total annual productivity of 8,000 tons per year. The company has set up several sales branches in different provinces in China. Meanwhile, the company's products are exported to Europe, USA, Middle East, Africa, Southeast Asia and other regions. The company has strong technical ability, complete testing equipments and a variety of fully automatic multi-station cold and hot heading machines, so as to provide you with reliable and high quality products.
Our main products ZYL brand fasteners include structural hex bolts ASTM A325 type 1, A490, hex head bolts DIN931, DIN933, EN14399, DIN6914, ISO4014, ISO4017 Gr8.8 Gr10.9 Gr12.9, ANSI B18.2.1 UNC and UNF Gr5, Gr8, fine pitch hex bolts DIN960, DIN961 Gr8.8 Gr10.9 Gr12.9, hex socket cap screws DIN912, ISO4762 Gr8.8 Gr10.9 Gr12.9 with surface Black, Zinc plated, Hot dip galvanized. Diameters from M10 to M48, length no limited. Hex Flange bolts DIN6921 Gr8.8 Gr10.9 with serration, thread rod A193 B7 long sizes and short sizes with 2H nuts, stud bolts. We also can supply hex nuts DIN934, DIN6915, plain washers DIN125, DIN126, DIN6916, spring washers DIN127 with Black, Zinc plated and Hot dip galvanized surface.
Our physical and mechanical test results can reach to ISO898-1 for bolts and ISO898-2 for nuts.
Through scientific management, Ningbo Zhongli Bolts Manufacturing Co., Ltd. obtained ISO9001 certificate of Quality Management System. Quality is the most important for us. We have strict production and inspection equipments to support this point.
We hope to establish business relationship with all over the world, and our business can bring in mutual benefits for both parties.
ABOUT COMPANY Ningbo Zhongli Bolts Manufacturing Co., Ltd. founded in 2003, is a professional manufacturer of high-strength fasteners in different specifications for various models, which covers an area of about 10,000 square meters, registered capital of 1500,000 RMB, with the total annual productivity of 8,000 tons per year. The company has set up several sales branches in different provinces in China.
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A Professional Sales and Technical Team with More Than 20 Years History.
We Have Our Own Testing Equipment and Laboratory, Our Products Have Initial Inspection, Patrol Inspection, And Final Inspection.
Our Factory Has Its Own Cold Forged, Hot Forged, And Heat Treatment Equipment.
Standard Fasteners in Stock, Non-standard Fasteners Can Be Customized.
We Have Passed Iso 9001, En 15048, En 14399, Ad2000 and Ce Certificates.
Our testing laboratory ensures all double-ended studs and high-tensile fasteners shipped to Gabon conform strictly to international standards (ISO, ASTM, DIN).
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