JIS F2007 Bulwark Chock Type A
The JIS F2007 Bulwark Chock Type A, also commonly known as a bulwark chock, is an essential marine mooring component strategically positioned within the bulwarks of vessels. It features a closed-hole shaped fairlead that precisely limits the position of cables, ensuring secure and efficient mooring operations. This chock is available in circular and oval shapes, catering to various marine mooring needs and enhancing safety on deck.
Key Features & Technical Specifications:
- Material Selection for Mooring Chock Body:
- The mooring chock body is crafted from seamless steel tubes that comply with GB 8162 204 standards, ensuring robustness and durability. Alternatively, it can be constructed using GB 712 Grade A steel plates that are bent into shape, offering flexibility in customization to meet specific marine mooring requirements.
- Stainless Steel Clad Plate:
- The stainless steel clad plate adheres to GB 4237 standards, utilizing 1Cr18Ni9Ti stainless steel for superior corrosion resistance. This feature is crucial for maintaining the chock’s integrity in harsh marine environments, prolonging its service life, and reducing maintenance needs.
- Precision Welding & Finishing:
- At the intersecting lines and outer rim of the mooring chock body, the welding surface is meticulously cleaned, free from cracks, warping, or skew. The edges are cut straight to sharp precision, enhancing the overall aesthetic and functional integrity of the product.
- The stainless steel clad plate is seamlessly integrated with the body, with welds exhibiting no pores, cracks, burrs, or depressions, ensuring a smooth and secure connection that withstands the test of time.
- Protective Coating:
- Apart from the stainless steel clad plate, the mooring chock is coated with rustproof paint to prevent corrosion. After loading onto the vessel, it can be further painted according to the ship hull’s specific requirements, ensuring compatibility and enhancing the overall appearance.
JIS F2007 Bulwark Chock (Type A) – Detailed Specifications:
| Type (mm) | L | L1 | L2 | H | H1 | H2 | B | C | Weight (kg) | Manila Rope (Dia.) | Wire Rope (Dia.) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 150 | 150 | 300 | 270 | 110 | 260 | 202 | 129 | 40 | 15.1 | 40 | 16(6×12) |
| 200 | 200 | 368 | 334 | 150 | 318 | 250 | 143 | 42 | 20.5 | 45 | 18(6×12) |
| 250 | 250 | 430 | 394 | 200 | 380 | 308 | 155 | 44 | 26.9 | 50 | 20(6×12) |
| 300 | 300 | 500 | 460 | 250 | 450 | 372 | 169 | 52 | 42.7 | 60 | 22.4(6×12) |
| 350 | 350 | 560 | 518 | 250 | 460 | 378 | 179 | 55 | 50.8 | 70 | 24(6×24) |
| 400 | 400 | 632 | 586 | 250 | 482 | 394 | 195 | 60 | 76.3 | 80 | 26(6×24) |
| 450 | 450 | 700 | 650 | 250 | 500 | 406 | 209 | 62 | 102 | 85 | 30(6×24) |
| 500 | 500 | 760 | 708 | 250 | 510 | 412 | 219 | 65 | 115 | 90 | 35.5(6×24) |
FAQs:
Q1: What is the primary function of the JIS F2007 Bulwark Chock Type A in marine mooring systems?
A1: The JIS F2007 Bulwark Chock Type A serves as a critical guide and securement point for mooring lines, limiting cable positions and preventing ship movement during berthing operations. Its closed-hole design ensures cables remain securely in place, enhancing safety and efficiency on deck.
Q2: What materials are used in the construction of the JIS F2007 Bulwark Chock Type A?
A2: The chock’s body is constructed from seamless steel tubes conforming to GB 8162 204 standards or bent GB 712 Grade A steel plates. The stainless steel clad plate adheres to GB 4237 standards, utilizing 1Cr18Ni9Ti stainless steel for superior corrosion resistance.
Q3: How does the JIS F2007 Bulwark Chock Type A ensure durability in harsh marine environments?
A3: The chock’s durability is ensured through meticulous welding and finishing processes, rustproof paint coatings, and the use of high-quality, corrosion-resistant materials. These features collectively contribute to its longevity and reliable performance in challenging marine conditions.
Q4: Can the JIS F2007 Bulwark Chock Type A accommodate different sizes of manila and wire ropes?
A4: Yes, the JIS F2007 Bulwark Chock Type A is designed to accommodate various sizes of manila and wire ropes, as specified in the detailed specifications table. This flexibility ensures compatibility with a wide range of marine mooring applications.
Q5: What is the significance of the protective coating on the JIS F2007 Bulwark Chock Type A?
A5: The protective coating, typically rustproof paint, prevents corrosion and extends the chock’s service life. After loading onto the vessel, it can be further painted according to the ship hull’s specific requirements, ensuring compatibility and enhancing the overall appearance while maintaining its protective properties.
Attention please: The description was copied from different cooperating manufacturers. The description may be different with the goods, please check with us when order.
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