Fender Chain

Fender Chain Installation Guide – Professional Marine Procedures

Comprehensive Installation Protocol for Safe & Effective Mooring

Pre-Installation Checklist:

1. Chain Specification Verification

   • Confirm chain grade (U2/U3) matches vessel requirements

   • Verify diameter compatibility with windlass/chain stopper

   • Check certification documents (ABS/DNV/LR)

2. Anchor System Compatibility

   • Match chain size to anchor weight (1mm chain diameter per 1kg anchor minimum)

   • Verify shackle/swivel load ratings exceed chain MBL

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Step-by-Step Installation Process

1. Chain Locker Preparation

• Measure locker capacity (minimum 10% extra space for chain movement)

• Install protective lining (UHMW polyethylene recommended)

• Ensure proper drainage to prevent seawater accumulation

2. Chain Stopper Installation

• Mount forged steel stopper with backing plates

• Torque bolts to manufacturer specifications (typically 300-500Nm)

• Align with windlass gypsy for straight lead

3. Anchor Roller Configuration

• Position roller at optimal bow angle (30-45° from horizontal)

• Verify clearances (minimum 3x chain diameter)

• Install chafe protection at contact points

4. Chain Threading Procedure

• Use chain hook or messenger line for controlled feed

• Maintain tension during deployment to prevent kinking

• Apply temporary lubrication during installation

5. Anchor Connection

• Preferred method:

  1. Anchor shank → 2. Heavy-duty bow shackle → 3. Swivel → 4. Chain end link

• Secure with:

  • Mousing wire (stainless steel)

  • Double-lock stainless steel pins

  • Anti-corrosion paste on threads

6. Final System Check

• Test windlass operation through full cycle

• Verify chain marks are visible and legible

• Confirm proper stowage in locker (figure-8 pattern)

Fender Chain Specification:

BM3		BM2		Nominal Diameter (mm)	Approx. Mass
Proof Test Load (KN)	Breaking Test Load (KN)	Proof Test Load (KN)	Breaking Test Load (KN)		(kg/ 27.5m)
–	–	9.3	18.6	6	21.45
–	–	12.6	25.2	7	29.15
–	–	18.5	33	8	38.23
–	–	20.9	41.8	9	48.4
–	–	25.8	51.6	10	59.68
–	–	31.2	62.4	11	72.33
–	–	41.2	82.6	12.5	93.23
–	–	51	101.9	14	116.88
92.42	184.83	66.2	132.3	16	139.43
110.55	221.1	78.89	157.78	17.5	178.35
130.32	260.64	93.6	187.2	19	217.68
151.7	303.42	108.64	217.27	20.5	229.14
174.4	349.4	125.4	250.9	22	264.49
207.9	415.8	149.9	298.9	24	341.82
244	488	175.4	350.8	26	369.94
283	566	203.8	406.7	28	427.04
324	649.8	234.2	467.5	30	490.98
				…

The description/sizes may be different with goods, please check with us when order.

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