 |
| Quantity: | |
|---|---|
DF-40A
HEE
CAST STEEL DOUBLE BITT
MOOEL NO | A | B | C | фD | фE | F | WT.(lbs) | HORN |
| DF-2 | 40" | 27" | 14" | 7" | 11" | 16” | 375 | √ |
| DF-2A | 40" | 27" | 14" | 7" | 11" | 16” | 385 | X |
| DF-40 | 45" | 24" | 15" | 9" | 13 1/2" | 18” | 545 | √ |
| DF-40A | 45" | 24" | 15" | 9" | 13 1/2" | 18” | 560 | X |
The Cast Steel Mooring Double Bitts serve as the backbone of vessel mooring systems, providing robust anchor points for securing multiple mooring lines during berthing, docking, and offshore operations. As modern vessels require increased mooring capacity to handle larger cargo loads and stronger environmental forces, these double bitts deliver exceptional strength with flexible line management capabilities . Constructed from ASTM A27 grade cast steel in a one-piece design, they feature dual 14-inch diameter posts standing 42 inches tall, spaced 24 inches apart to accommodate parallel mooring lines. With a combined safe working load (SWL) of 1800 kN (183 tons), these bitts are engineered for large commercial vessels, including bulk carriers, container ships, and LNG tankers operating in major ports worldwide.
The two vertical posts feature integral base reinforcement with 1-inch thick webbing connecting them to the 30-inch square mounting flange . Each post includes a tapered top (6-inch diameter at peak) with rounded edges to prevent rope damage, while the post surfaces are polished to Ra 3.2μm finish to reduce friction. The spacing allows simultaneous handling of two 90mm diameter ropes with minimal interference.
Manufactured using resin sand casting for complex geometry replication, the bitts achieve consistent material properties with tensile strength exceeding 400 MPa . The one-piece casting eliminates welds that create potential failure points, while heat treatment to 190 BHN ensures optimal hardness for wear resistance. Non-destructive testing confirms absence of internal defects in critical load areas.
The entire assembly undergoes a multi-step surface treatment: abrasive blasting to SA 3.0, application of 150μm zinc-rich epoxy primer, and finish coating with 80μm marine-grade polyurethane . This system provides 2000+ hours of salt spray resistance per ASTM B117. Drainage channels machined into the base flange prevent water pooling around mounting bolts.
The dual posts allow independent securing and adjustment of multiple mooring lines, enabling precise tension control and reducing the risk of line entanglement . This configuration provides operational flexibility to handle different mooring scenarios, including port berthing, offshore anchoring, and emergency situations.
One-piece casting creates a continuous load path from the posts to the mounting flange, eliminating welds that can fatigue under cyclic loading . This design provides 30% greater fatigue resistance compared to welded fabricated bitts, extending service life in high-cycle applications.
These bitts are optimized for Panamax and Post-Panamax vessels ranging from 50,000 to 200,000 DWT, including container ships, bulk carriers, and oil tankers . Their load capacity and dimensions align with the mooring requirements of large vessels operating in international trade routes.
Installation requires full-penetration welds to the vessel’s main structural members, following AWS D1.1 welding specifications . The mounting flange must be supported by reinforcing plates (minimum 1-inch thickness) welded to the deck or bulkhead structure to distribute loads effectively.
Monthly inspections should check for corrosion, rope wear patterns, and weld integrity . Annual maintenance includes touch-up painting of damaged areas with compatible marine coatings and torque verification of mounting hardware. Load testing at 125% of SWL is recommended every 5 years.
CAST STEEL DOUBLE BITT
MOOEL NO | A | B | C | фD | фE | F | WT.(lbs) | HORN |
| DF-2 | 40" | 27" | 14" | 7" | 11" | 16” | 375 | √ |
| DF-2A | 40" | 27" | 14" | 7" | 11" | 16” | 385 | X |
| DF-40 | 45" | 24" | 15" | 9" | 13 1/2" | 18” | 545 | √ |
| DF-40A | 45" | 24" | 15" | 9" | 13 1/2" | 18” | 560 | X |
The Cast Steel Mooring Double Bitts serve as the backbone of vessel mooring systems, providing robust anchor points for securing multiple mooring lines during berthing, docking, and offshore operations. As modern vessels require increased mooring capacity to handle larger cargo loads and stronger environmental forces, these double bitts deliver exceptional strength with flexible line management capabilities . Constructed from ASTM A27 grade cast steel in a one-piece design, they feature dual 14-inch diameter posts standing 42 inches tall, spaced 24 inches apart to accommodate parallel mooring lines. With a combined safe working load (SWL) of 1800 kN (183 tons), these bitts are engineered for large commercial vessels, including bulk carriers, container ships, and LNG tankers operating in major ports worldwide.
The two vertical posts feature integral base reinforcement with 1-inch thick webbing connecting them to the 30-inch square mounting flange . Each post includes a tapered top (6-inch diameter at peak) with rounded edges to prevent rope damage, while the post surfaces are polished to Ra 3.2μm finish to reduce friction. The spacing allows simultaneous handling of two 90mm diameter ropes with minimal interference.
Manufactured using resin sand casting for complex geometry replication, the bitts achieve consistent material properties with tensile strength exceeding 400 MPa . The one-piece casting eliminates welds that create potential failure points, while heat treatment to 190 BHN ensures optimal hardness for wear resistance. Non-destructive testing confirms absence of internal defects in critical load areas.
The entire assembly undergoes a multi-step surface treatment: abrasive blasting to SA 3.0, application of 150μm zinc-rich epoxy primer, and finish coating with 80μm marine-grade polyurethane . This system provides 2000+ hours of salt spray resistance per ASTM B117. Drainage channels machined into the base flange prevent water pooling around mounting bolts.
The dual posts allow independent securing and adjustment of multiple mooring lines, enabling precise tension control and reducing the risk of line entanglement . This configuration provides operational flexibility to handle different mooring scenarios, including port berthing, offshore anchoring, and emergency situations.
One-piece casting creates a continuous load path from the posts to the mounting flange, eliminating welds that can fatigue under cyclic loading . This design provides 30% greater fatigue resistance compared to welded fabricated bitts, extending service life in high-cycle applications.
These bitts are optimized for Panamax and Post-Panamax vessels ranging from 50,000 to 200,000 DWT, including container ships, bulk carriers, and oil tankers . Their load capacity and dimensions align with the mooring requirements of large vessels operating in international trade routes.
Installation requires full-penetration welds to the vessel’s main structural members, following AWS D1.1 welding specifications . The mounting flange must be supported by reinforcing plates (minimum 1-inch thickness) welded to the deck or bulkhead structure to distribute loads effectively.
Monthly inspections should check for corrosion, rope wear patterns, and weld integrity . Annual maintenance includes touch-up painting of damaged areas with compatible marine coatings and torque verification of mounting hardware. Load testing at 125% of SWL is recommended every 5 years.
