IIIBEAR Solutions | Fastener Solutions for Shipbuilding Industry

At present, the ship and shipping industry is gradually focusing on intelligent ships and green low-carbon development. With the arrival of the digital intelligence era, ships have also adopted various digital design methods. Revolutionary changes have made modern ship design a customized, discrete large-scale factory design. In ship design, fasteners are one of the indispensable parts. A ship uses hundreds of thousands of large and small fasteners, which are not only simple components connecting various parts of the hull, but also important components ensuring the safe operation of the ship. IIIBEAR has cooperated with many shipbuilding enterprises to provide marine fasteners and stainless steel fastener series products for the installation of equipment, pipelines and other accessories in decks, engine rooms and superstructures.

1. Stainless Steel Fasteners for Ships

Austenitic stainless steel and duplex stainless steel fasteners with excellent corrosion resistance help navigation. In the marine environment, corrosion is one of the main problems faced by ships. The ship's superstructure, including the驾驶甲板 (navigation deck), living deck, and compass deck, etc., is directly in contact with the marine environment, and has extremely high requirements for corrosion resistance, aesthetics, and safety. Stainless steel fasteners are generally selected because they can resist the erosion of seawater, sea breeze, and other harsh environments for a long time, ensuring the structural stability of the ship.

IIIBEAR can provide corrosion-resistant austenitic stainless steel 304, A2-70, 316, 316L, A4-80; duplex stainless steel 2205, 2507 and other series of fasteners. Among them, austenitic stainless steel fasteners can also be passivated to enhance their resistance to marine atmosphere and seawater corrosion.

IIIBEAR can also provide common stainless steel fastener products for the shipbuilding industry, such as: stainless steel hex head screws, stainless steel socket head cap screws, stainless steel pan head square neck bolts, stainless steel hex nuts, stainless steel flat washers/large flat washers, stainless steel hex nylon lock nuts, stainless steel hex thin nylon lock nuts, stainless steel hex insert nylon lock nuts, stainless steel socket set screws with concave point, stainless steel socket countersunk head screws, stainless steel socket head cap screws, stainless steel socket head plugs, stainless steel wires, shackles, stainless steel riggings, lifting rings and other stainless steel fastener products.

For some special-purpose ships, such as the deck of the crude oil tanker shown in the figure above, which is laid with many pipelines, the corrosion resistance requirements for fastener products are very strict. In addition to using stainless steel fasteners, hot-dip galvanizing surface treatment of fasteners can also be done according to customer needs to enhance the corrosion resistance of fasteners.

2. Waterproof Fasteners

Due to the impact and immersion of seawater during the navigation of the ship, some electrical control boxes located on the ship's deck and the outside of the superstructure have certain requirements for dustproof and waterproof performance. Therefore, waterproof fasteners need to be used when installing these boxes to ensure the overall tightness. Common methods such as using sealing washers and applying glue to screws are used to enhance the tightness and waterproofness of fasteners.

3. Weathering Steel Fasteners

IIIBEAR can provide weathering steel fasteners for the shipbuilding industry. Weathering steel fastener products have the characteristics of high strength, corrosion resistance, no painting, less maintenance, and light maintenance.

4. Special Grade Fasteners

The engine room located at the stern has many equipment and is the part where the most fasteners are used, mainly using U-bolts, pipe flange connecting studs, nuts, hex bolts, etc. It should be noted that in some pipelines where the transported medium has a high temperature, the flange connection should use the special grade fasteners in GB/T9125-2010 "Bolts for Pipe Flange Connections", such as the connecting pipelines of boilers and steam turbines. The design performance of special grade fasteners can effectively avoid the connection failure caused by thermal expansion and contraction due to pipeline temperature changes.

Summary

Small fasteners play a vital role in the construction, maintenance, and repair of ships. Their quality and reliability are directly related to the safety and performance of the ship. Therefore, when selecting fasteners, it is necessary to choose high-quality products that meet the standards to provide a more reliable guarantee for the safe operation of the ship. IIIBEAR has complete testing equipment and can provide you with fastener products with superior performance grades. The factory has passed ISO9001 and IATF16949 quality system certifications.