China Ship Manhole Cover CB/T19 – 2001: High – Quality Marine Access Solutions
Our China Ship Manhole Cover, adhering to the standard CB/T19 – 2001, is an essential component for various ship tanks, including oil tanks, water tanks, and voil tanks. These manhole covers are precisely fixed on flat positions on the hold bottom, deck, and bulkhead of ships, providing reliable access and ensuring the safety and integrity of the tank contents. We offer four distinct types – Type A, B, C, and D – each designed to meet specific requirements. The covers come in versatile shapes such as round, oval, and square, allowing for seamless integration into different ship designs.
Key Features
- Compliance with CB/T19 – 2001 Standard: Our ship manhole covers are manufactured in strict accordance with the CB/T19 – 2001 standard, ensuring high quality, reliability, and safety in marine applications. This standard guarantees that the covers can withstand the harsh marine environment and perform their intended functions effectively.
- Durable Material Construction:
- Cover and Coaming: Made of carbon steel, which provides excellent strength and durability, enabling the covers to withstand heavy loads and external forces commonly encountered on ships.
- Seal Ring: Constructed from NBR (Nitrile Butadiene Rubber), which offers superior sealing properties, preventing leakage of liquids or gases from the tanks. This ensures the safety of the ship’s crew and the environment.
- Bolt, Nut, and Washer: Available in stainless steel, carbon steel, and copper, these components are corrosion – resistant and provide a secure fastening mechanism for the manhole covers, ensuring they remain in place even under extreme conditions.
- Multiple Types and Shapes: With four types (A, B, C, and D) and three shapes (round, oval, square) to choose from, our ship manhole covers can be tailored to meet the specific needs of different ship tanks and access requirements. This versatility makes them suitable for a wide range of marine vessels.
- Customizable Coaming Height: The coaming height, which is 100MM in the standard drawing, can be adjusted according to the customer’s specific requests. This flexibility allows for better integration with the ship’s structure and ensures optimal performance.
Marine Manhole Cover Type A: Marine Rising Manhole Cover
Type A, also known as the Marine Rising Manhole Cover, is designed for easy access to ship tanks. It features a raised design that allows for convenient opening and closing, especially in situations where quick access is required.
Main Size List (mm)
| Model | Nominal Size (LxB) | Diameter | L | L1 | L2 | B | B1 | B2 | S | Bolt Quantity | Weight (kgs) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 450×350 | – | 450 | 470 | 570 | 350 | 370 | 470 | 4 | M20 | 16: 23.2; 6: 30.8; 8: 36.9; 10: 45.8 |
| A | 600×400 | – | 600 | 630 | 720 | 400 | 420 | 520 | 6 | 20 | 48.8; 8: 59.2; 10: 69.3; 12: 79.6 |
| A | 800×600 | – | 800 | 820 | 920 | 600 | 620 | 720 | 8 | 26 | 52.4; 10: 65.8; 12: 78.2; 14: 90.2 |
Marine Manhole Cover Type B: Marine Flush Manhole Cover
Type B, referred to as the Marine Flush Manhole Cover, has a flush – mounted design that provides a smooth surface on the ship’s deck or bulkhead. This type is ideal for applications where a level surface is required to prevent tripping hazards or to maintain the aesthetic appearance of the ship.
Main Size List (mm)
| Model | Nominal Size (LxB) | Diameter | L | L1 | L2 | B | B1 | B2 | S | Bolt Quantity | Weight (kgs) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| B1 | 450×350 | – | 450 | 470 | 570 | 350 | 370 | 470 | 4 | M20 | 16: 28.9; 6: 33.8; 8: 37.2; 10: 41.2 |
| B1 | 600×400 | – | 600 | 630 | 720 | 400 | 420 | 520 | 8 | 20 | 49.5; 10: 55.6; 12: 61.2; 14: 67.6 |
| B1 | 800×600 | – | 800 | 820 | 920 | 600 | 620 | 720 | 12 | 26 | 67.2; 14: 75.2; 16: 82.8; 18: 89.9 |
| B2 | 800×400 (Oval) | – | 800 | 830 | 930 | 400 | 430 | 530 | 12 | 24 | 56.8; 14: 63.2; 16: 69.2; 18: 76.2 |
Marine Manhole Cover Type C: Marine Sunk Manhole Cover (GB11628 – 89 Type D)
Type C, known as the Marine Sunk Manhole Cover, is designed to be recessed into the ship’s structure, providing a low – profile access point. In the GB11628 – 89 standard, it is classified as Type D. This type is suitable for applications where space is limited or where a flush – like appearance is desired while still maintaining access to the tank.
Main Size List (mm)
| Model | Nominal Size (LxB) | Diameter | L | L1 | L2 | B | B1 | B2 | S | Bolt Quantity | Weight (kgs) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C1 | 450×350 | – | 450 | 470 | 650 | 350 | 470 | 550 | 10 | M20 | 16: 116.6; 12: 121.6; 14: 128.6 |
| C1 | 600×400 | – | 600 | 720 | 800 | 400 | 520 | 600 | 10 | 20 | 136.1; 12: 142.2; 14: 149.5 |
| C1 | 800×600 | – | 800 | 920 | 1000 | 600 | 720 | 800 | 12 | 26 | 171.5; 14: 182.6; 18: 206.8 |
| C2 | 800×400 (Oval) | – | 800 | 930 | 1010 | 400 | 530 | 610 | 12 | 24 | 102.8; 14: 118.2; 18: 146.2; 18: 76.2 (possible error in data, check original) |
Marine Manhole Cover Type D: Marine Sunk Manhole Cover (GB11628 – 89 Type E)
Type D, also a Marine Sunk Manhole Cover, is classified as Type E in the GB11628 – 89 standard. It shares similar characteristics with Type C but may have some differences in design or specifications to meet specific requirements. This type provides a reliable and secure access solution for ship tanks.
Main Size List (mm)
| Model | Nominal Size (LxB) | Diameter | L | L1 | L2 | B | B1 | B2 | S | Bolt Quantity | Weight (kgs) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D1 | 450×350 | – | 450 | 570 | 620 | 350 | 470 | 520 | 14 | M20 | 16: 73.1; 16: 81.6; 18: 90.2 |
| D1 | 600×400 | – | 600 | 720 | 770 | 400 | 520 | 570 | 14 | 20 | 83.6; 16: 88.8; 18: 94.8 |
| D1 | 800×600 | – | 800 | 930 | 970 | 600 | 720 | 770 | 14 | 26 | 108.4; 16: 120.6; 20: 149.8 |
| D2 | 800×400 (Oval) | – | 800 | 930 | 980 | 400 | 530 | 580 | 14 | 24 | 89.4; 16: 102.5; 20: 127.8 |
FAQs
Q1: How do I choose the right type of ship manhole cover for my ship’s tank?
A1: The choice of the right type of ship manhole cover depends on several factors. If you need quick and easy access, Type A (Marine Rising Manhole Cover) may be a good option. For a level surface to prevent tripping hazards, Type B (Marine Flush Manhole Cover) is suitable. If space is limited or you want a low – profile access point, Type C or D (Marine Sunk Manhole Covers) can be considered. You should also take into account the specific requirements of your ship’s tank, such as the type of contents stored and the access frequency.
Q2: Can the ship manhole covers be painted to match the color of my ship?
A2: Yes, our ship manhole covers can be painted to match the color of your ship. We can provide a painting service or you can paint them yourself after installation. However, it is important to use marine – grade paint that is resistant to corrosion and the harsh marine environment to ensure the longevity of the covers.
Q3: How often should I inspect and maintain the ship manhole covers?
A3: Regular inspection and maintenance are crucial for the proper functioning of ship manhole covers. It is recommended to inspect the covers at least once a month for signs of damage, corrosion, or leakage. Check the seal ring for any cracks or wear and replace it if necessary. Also, ensure that the bolts, nuts, and washers are tightened properly. Lubricate the moving parts, such as hinges (if applicable), to prevent rust and ensure smooth operation.
Q4: Are your ship manhole covers suitable for all types of ships?
A4: Our ship manhole covers are designed to be versatile and can be used on a wide range of ships, including cargo ships, tankers, and offshore vessels. However, it is important to select the appropriate type and size based on the specific requirements of your ship’s tanks and the operating conditions. Our team can provide professional advice to help you choose the right covers for your ship.
Q5: What is the warranty period for your ship manhole covers?
A5: We offer a [X] – year warranty for our ship manhole covers. During the warranty period, if there are any defects in materials or workmanship, we will repair or replace the covers free of charge. Please refer to our warranty policy for more detailed information.
Please Note: The description might be incorrect, please contact us for confirmation.
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