Roller Bar Type Anchor Chain Stopper | GB/T 3844 for 42–132 mm Anchor Chain

Product Overview

The GB/T 3844 roller bar type anchor chain stopper is a deck-installed chain holding device used in ship anchoring arrangements to secure the anchor chain and anchor after the anchor is housed. It is normally arranged in the anchor chain line to reduce the holding load carried by the windlass and to keep the chain controlled under heavy sea conditions.

This page focuses on the GB/T 3844-2000 roller lever / roller bar type for nominal diameters 44 to 132, covering chain diameters 42 to 132 mm according to the supplied parameter table. For engineering selection, the stopper bar / gate bar is specified as forged alloy steel, the side wall plates around the stopper area are specially reinforced, and the shaft lubrication design supports flexible rotation of the chain wheel / roller. The vessel installation position and chain entry / exit angles should be provided because they directly affect chain stopper height and chain-line alignment.

Quick Specifications

• Product type: roller bar type anchor chain stopper → holds anchor chain and anchor position after anchoring operation and reduces windlass holding load.
• Technical standard: GB/T 3844-2000 → reference for standard type, nominal diameter range, main dimensions, and quotation selection.
• Chain diameter range: 42–132 mm through nominal diameters 44–132 → suitable for the standard table range; smaller chain sizes should be confirmed separately.
• Strength basis: designed with reference to 80% of the anchor chain minimum breaking load according to the supplied description → this is a design basis, not a webpage SWL declaration.
• Stopper bar / gate bar: forged alloy steel according to the supplied manufacturing note → selected for the chain-contact holding point where local force is concentrated.
• Side wall plates: specially reinforced around the stopper bar area → supports transfer of anchor chain pull into the stopper body and deck foundation.
• Shaft and roller design: lubrication arrangement supports flexible chain wheel / roller rotation → helps movement, maintenance, and chain alignment during operation.
• Surface treatment: Sa 2.5 blasting + one layer epoxy shop primer as reference → galvanized, polished, or customized finishing should be confirmed by project specification.

Main Technical Parameters

Selection & Inquiry Guide

Step 1: Confirm GB/T 3844-2000 roller bar / roller lever type and nominal diameter 44–132 according to the actual anchor chain diameter.

Step 2: Provide vessel installation position, windlass-to-hawse-pipe arrangement, chain entry angle, and chain exit angle so the chain stopper height and chain-line alignment can be checked.

Step 3: Confirm anchor chain grade, chain minimum breaking load, and classification requirement. The supplied design basis of 80% chain minimum breaking load should be verified against the vessel design and class approval scope.

Step 4: Confirm material requirements for the forged alloy steel stopper bar / gate bar, side wall plates, body, shaft, roller, and any material traceability requirement.

Step 5: Confirm surface treatment, NDE inspection scope, lubrication requirement, maker certificate or class certificate requirement, quantity, delivery destination, and required delivery time.

Step 6: Provide GA drawing, installation drawing, reference photos, or replacement sample information if the chain stopper is for a repair or retrofit project.

Structure

Deck-mounted chain stopper body | Roller bar / roller lever arrangement | Forged alloy steel stopper bar / gate bar | Reinforced side wall plates | Chain wheel / roller | Lubricated shaft | Chain holding interface | Mounting base | Project-specified coating

Anchor Chain Holding, Fabrication & Engineering Advantages

• The forged alloy steel stopper bar / gate bar is selected for the chain-contact holding point where the local chain force is concentrated.
• Side wall plates are strengthened around the stopper bar area so the holding force can be transferred through the stopper structure instead of being carried by the windlass.
• The roller/bar arrangement helps guide chain movement when the stopper is opened or released, while the lubricated shaft supports flexible chain wheel / roller rotation.
• Chain stopper height should be matched with the actual installation position and chain entry / exit angles to help the chain link meet the stopper bar correctly and reduce abnormal side loading.
• The supplied strength reference is 80% of the anchor chain minimum breaking load; final selection should be checked with anchor chain grade, vessel arrangement, deck foundation, and class approval requirement.
• Sa 2.5 blasting with epoxy shop primer can be used as a reference corrosion protection arrangement, while final coating follows the vessel painting specification or customer requirement.
• NDE inspection and material traceability can be arranged according to project requirement, especially for forged, welded, cast, and load-transfer areas.

Custom Attributes

• Standard: GB/T 3844-2000 → used when the vessel drawing or procurement specification calls for this standard chain stopper type.
• Type: Roller bar / roller lever type → suitable for anchor chain holding and windlass load reduction in the anchor chain line.
• Nominal Diameter: 44 / 48 / 52 / 56 / 60 / 64 / 68 / 73 / 78 / 84 / 90 / 95 / 102 / 107 / 114 / 122 / 132 → selected according to actual chain diameter.
• Chain Size: 42–132 mm → based on the supplied table; smaller chain sizes require separate design or other standard confirmation.
• Design Strength Basis: 80% of anchor chain minimum breaking load → selection reference to be checked with chain grade and classification approval; not written as product SWL.
• Stopper Bar Material: forged alloy steel → specified for the gate / bar component where high chain pull is resisted.
• Side Wall Plate Reinforcement: reinforced at the stopper area → improves structural support around the chain holding point.
• Installation Data: vessel position and chain entry / exit angle required → used to confirm chain stopper height and chain-line geometry.
• Material Options: mild steel, C-Mn steel, stainless steel, cast steel, nodular cast iron, and steel forging → final component material grade should be confirmed before production.
• Surface Treatment: Sa 2.5 blasting + epoxy shop primer, galvanized, polished, or customized finish → final coating follows project specification.
• Certificate Requirement: available according to project requirement → maker certificate, material certificate, class certificate, or witness inspection should be confirmed before quotation.

How It Works

Anchor chain runs through the stopper position → Chain wheel / roller guides the chain line → Forged alloy steel stopper bar / gate bar engages the chain link → Chain pull is transferred through reinforced side wall plates and stopper body to the deck foundation → Windlass holding load is reduced → Shaft lubrication supports flexible roller movement during operation

Applications

Ship anchoring arrangement | Anchor windlass deck area | Chain stopper between windlass and hawse pipe | Forecastle deck equipment | Cargo vessels | Tankers | Bulk carriers | Container vessels | Workboats | Newbuilding and repair replacement projects

Certifications & Advantages

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

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

Drawing & Photos

FAQ

Q1: What information is needed to confirm chain stopper height?

A1: The vessel installation position, chain entry angle, chain exit angle, windlass and hawse pipe relationship, deck foundation arrangement, and actual chain diameter should be provided. These items affect chain-line alignment and whether the stopper bar meets the chain link correctly.

Q2: Is the 80% anchor chain minimum breaking load a product SWL?

A2: No. The supplied description states that the chain stopper is designed with reference to 80% of the anchor chain minimum breaking load. This should be treated as a design strength basis, not a direct webpage SWL declaration. Final selection should be checked with chain grade, vessel drawing, deck foundation, and class approval requirement.

Q3: Why use a forged alloy steel stopper bar and reinforced side wall plates?

A3: The stopper bar / gate bar is the critical chain-contact holding component, so forged alloy steel is used to support strength at the high-load contact area. The side wall plates are reinforced around the stopper position to help transfer anchor chain pull through the chain stopper body and deck foundation.