Ships and Marine Technology — Ship's Mooring and Towing Fittings — Shipside Roller Fairleads
1 Scope
This standard specifies the design, size and technical requirements for shipside roller fairleads.
This standard is applicable to the design, manufacture and acceptance of shipside roller fairleads.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 13755 Ships and Marine Technology — Ship's Mooring and Towing Fittings — Steel Rollers
IMO Circular MSC/
Circ.1175 Guidance on Shipboard Towing and Mooring Equipment
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
safe working load (SWL)
maximum load, in kN, on the rope that should normally be applied in service conditions
4 Classification
4.1 Types
Depending on the construction, roller fairleads shall be classified as the following two types:
— 2-roller type;
— 3-roller type.
4.2 Nominal sizes
The nominal sizes, Dn, of roller fairleads are denoted by reference to the outside diameter of the roller, in millimeters, from a basic series of preferred numbers. The nominal sizes are: 150, 200, 250, 300, 350, 400, 450 and 500.
5 Dimensions
Roller fairleads have dimensions and particulars in accordance with Tables 1 and 2, and Figures 1 and 2.
a) 2-roller type b) 3-roller type
Figure 1 Layout of roller fairleads
Table 1 Dimensions and SWL of roller fairleads
Dimensions in millimeters
Nominal size Dn 2-roller type 3-roller type l1 l2 Pe SWLb
l We l We θa = 90° θa = 20°
kN t kN t
a θ is the relative angle of ropes on the roller fairlead (refer to Annex A).
b The SWL is the maximum applicable rope tension based on 90° (θ = 90°) and 160° (θ = 20°) deflection of rope direction by the roller fairlead.
The SWLs shown in this table are for reference only. These are based on the loadings as mentioned in Annex A.
The “SWL” may be adjusted depending on the actual loading conditions, and the actual marking shall be agreed between the user and the manufacturer.
c P and W are for reference only. The opening size on the shell or bulwark shall be determined considering overhauling space of the roller.
Dimensions in millimeters
Key:
1 — seat;
2 — steel rollers.
H: The height of the roller fairlead shall be determined in accordance with the height of the shipside gutter coaming.
α: The inclination of α° is to be determined in accordance with the rope leading inclination.
Note: The end shape of the fairleads shown in “Detail Y” can be changed as per manufacturer’s standard based on no sharp edges to avoid rope damage.
Foreword II 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification 5 Dimensions 6 Materials 7 Manufacturing and Inspection 8 Marking Annex A (Informative) Basis for Strength Assessment of Shipside Roller Fairleads Annex NA (Informative) Marking Bibliography
ICS 47.020.50 U 21 GB 中华人民共和国国家标准 GB／T 37448—2019／ISO 13767：2012
船舶和海上技术 船舶系泊和拖带设备 舷边滚轮导缆器 Ships and marine technology—Ship’s mooring and towing fittings— Shipside roller fairleads (ISO 13767：2012，IDT)
船体／舷墙开孔 a) 双滚轮型 b) 三滚轮型 图1 舷边滚轮导缆器布置示意图 表1 舷边滚轮导缆器尺寸及安全工作负荷 单位为亳米 公称尺寸Dn 双滚轮型 三滚轮型 l1 l2 Pe 安全工作负荷b l We l We θa＝90° θa＝20° kN t kN t
a θ是经过舷边滚轮导缆器的系泊索形成的夹角(参见附录A)。 b 安全工作负荷(SWL)是基于缆绳通过滚轮形成的夹角为90°(即θ＝90°)与20°(即θ＝20°，包角为160°)的状态核算得出的缆绳可承受的最大拉力。 表中安全工作负荷按照附录A的评定方法得出，仅供参考。 安全工作负荷可以根据实际的负荷状态进行调整，实际标示的安全工作负荷应是制造厂和使用方共同认可的数值。 c P和W尺寸仅供参考。船体外板或者舷墙开孔大小的确定应考虑滚轮拆卸空间的需求。 单位为毫米
排水孔 水密 SWL标志 下方加强结构 甲板 约50 打磨光顺 说明： 1——基座； 2——钢质导缆滚轮。 H：滚轮导缆器的高度取决于舷侧顶板的高度。 α：倾斜角α应与系泊索导缆时倾斜度一致。 注：“详图Y”所示的导缆器的外端面形状按照无锐边以避免造成系泊索损坏的原则，可以采用不同于本图的制造厂标准。 图2 舷边滚轮导缆器结构示意图 注：图2适用于甲板栏杆式，船体／舷墙开孔式可参考。 表2 舷边滚轮导缆器尺寸规格 单位为毫米 公称尺寸Dn A B C R dc h1 t1 t2 焊脚长度a 计算重量b A型、B型 C型 z1 z2 z3 双滚轮型 三滚轮型
