OCIMF Type SPM Chain Stopper | Welded Mounting for Chafe Chain Mooring

OCIMF Type SPM Chain Stopper | Welded Mounting for Chafe Chain Mooring

Product Overview

The OCIMF type single point mooring chain stopper is a welded mounting deck fitting used to hold and secure the chafe chain in a single point mooring hawser arrangement. It is normally arranged on the tanker bow area together with the bow fairlead, mooring hawser, chafe chain, support buoy, pick-up line, and related SPM mooring equipment.

This page is prepared for welded mounting chain stoppers covering nominal chain diameters 54–56 mm and 76–78 mm with supplied SWL values of 100 t and 200 t. Because SPM mooring equipment is closely related to tanker mooring safety, the final chain size, chafe chain type, SWL definition, welded foundation, deck reinforcement, inspection scope, and class approval procedure should be confirmed from the approved vessel arrangement and project specification.

Quick Specifications

• Product type: SPM chain stopper → used to hold the OCIMF chafe chain in single point mooring arrangements.

• Mounting type: Welded mounting → deck foundation, weld detail, and local reinforcement should be confirmed by drawing.

• Nominal chain diameter: 54–56 mm and 76–78 mm → select according to the chafe chain supplied for the tanker SPM hawser system.

• Supplied SWL range: 100 t and 200 t → use the project-approved load basis and do not convert to test load or breaking load without calculation.

• Main dimensions: L, B, H, H1, and b → key values for deck space checking, foundation design, and quotation confirmation.

• Material options: mild steel, C-Mn steel, high tensile steel, and cast steel → exact material grade and component construction should be confirmed before production.

• Installation focus: welded base and chain load path → supporting deck structure, foundation plate, and weld volume are project-critical.

• Inspection focus: material traceability, welding quality, dimensional inspection, NDT, load verification, and class witnessing according to order scope.

Main Technical Parameters

Main webpage dimensions from the supplied data. Dimensions are in mm unless otherwise stated. SWL values are supplied data and should be checked against the project load basis, chafe chain specification, and class approval requirement.

Selection & Inquiry Guide

Step 1: Confirm OCIMF type SPM chain stopper and the required nominal chafe chain diameter: 54–56 mm or 76–78 mm.

Step 2: Confirm the SPM hawser arrangement, chafe chain type, bow fairlead arrangement, and whether the chain stopper is for newbuilding, retrofit, or replacement.

Step 3: Confirm load basis: SWL, design load, proof load, breaking load, safety factor, and any project-specific calculation or class approval requirement.

Step 4: Confirm welded mounting details: deck position, foundation type, weld detail, base reinforcement, surrounding clearance, and relationship with the bow chock / fairlead.

Step 5: Confirm material grade, casting or fabrication scope, surface treatment, coating system, NDT requirement, and low-temperature or special steel requirement if applicable.

Step 6: Confirm certificate scope before quotation: maker certificate, material certificate, welding record, NDT report, load test record, class certificate, or witness inspection.

Step 7: Provide quantity, vessel type, destination, required delivery time, installation drawing, chafe chain specification, and reference photos if available.

Structure

Welded mounting base | Chain stopper body | Chafe chain holding area | Load-bearing bracket / cheek plates to be confirmed | Locking or securing arrangement to be confirmed | Deck foundation interface | Surface protection system

Mooring, Welding & Engineering Advantages

• The chain stopper holds the chafe chain in the SPM hawser arrangement and helps transfer mooring loads into the vessel structure through the welded foundation.

• The two supplied chain size ranges cover the common project selection points of 54–56 mm and 76–78 mm chafe chains, with larger dimensions and weights increasing significantly for the 200 t version.

• Deck foundation design is critical because the chain load is transferred through the stopper body, welded base, and supporting hull structure. Local reinforcement should be checked by the shipyard or design office.

• The chafe chain contact and holding area should be machined, dressed, or finished according to the approved drawing to reduce sharp local contact and ensure correct chain seating.

• Welding preparation, weld volume, fit-up control, and NDT scope should be agreed before production because the product is a welded mounting fitting used in high-load SPM service.

• Material traceability and inspection records can be arranged according to project requirement, especially when high tensile steel, cast steel, low-temperature steel, or class witnessing is specified.

• OCIMF wording should be used carefully. The equipment can be supplied for OCIMF-type SPM arrangements, but final acceptance depends on the approved project specification, vessel arrangement, and applicable class procedure.

Custom Attributes

• Product Type: SPM chain stopper → welded deck fitting for holding the chafe chain in single point mooring arrangements.

• Application System: OCIMF-type SPM hawser arrangement → final compatibility should be confirmed with the complete hawser and chafe chain specification.

• Nominal Chain Diameter: 54–56 mm / 76–78 mm → select according to the chafe chain used on the export tanker side.

• SWL: 100 t / 200 t as supplied → exact definition, load test, safety factor, and class approval basis should be confirmed.

• Mounting Type: Welded mounting → foundation plate, weld detail, and deck reinforcement are to be confirmed by drawing.

• Material: Mild steel / C-Mn steel / high tensile steel / cast steel → exact grade and material certificate scope should be agreed before quotation.

• Foundation Option: Optional base foundation type → use only after project drawing confirmation.

• Surface Treatment: Blasting and marine coating system to be confirmed → final primer, DFT, topcoat, and repair procedure follow project specification.

• Certificate Requirement: Available according to order scope → class certificate, material certificate, NDT report, and witness inspection should be confirmed before quotation.

How It Works

SPM hawser connects to the tanker side chafe chain → Chafe chain is seated and secured in the chain stopper → Mooring load is transferred from chain to stopper body → Load passes through the welded mounting base into the reinforced deck foundation → Inspection and coating are completed according to project requirement

Applications

SPM tanker bow arrangements | Offshore loading and offloading terminals | CALM / single buoy mooring systems | Export tanker mooring equipment | Chafe chain holding arrangements | Newbuilding, retrofit, and replacement projects

Certifications & Advantages

Certificates can be arranged according to project requirement, inspection scope, material traceability, welding inspection, and classification society approval procedure.

Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, Makers Test Certificate.

6. Can be customized

Main Technical Parameters:

Drawing of OCIMF Type Single Point Mooring Chain Stopper Welded Mounting ShipTowing Equipment