High-Quality Studless Link Anchor Chain for Marine and Offshore Applications

Engineered for Maximum Mooring Strength and Smooth Operation

Studless link Anchor Chain
Studless link Anchor Chain2
Studless link Anchor Chain3
Studless link Anchor Chain4
Studless link Anchor Chain5
Studless link Anchor Chain6
Studless link Anchor Chain
Studless link Anchor Chain2
Studless link Anchor Chain3
Studless link Anchor Chain4
Studless link Anchor Chain5
Studless link Anchor Chain6

#1 MARINE HARDWARE

Studless link Anchor Chain

Product attributes :

Feature

Studless Link Construction

Studless Anchor Chain consists of interconnected steel links without transverse studs. Link dimensions and cross-sectional geometry are specified according to the applicable chain standard and grade.

Marine Chain Grades

Available in specified marine chain grades according to material requirements, mechanical properties, applicable standards and classification requirements.

Link Dimensions

Chain dimensions include nominal diameter, inside length, outside length, inside width and link cross-section. These parameters determine chain compatibility with the anchoring system and associated equipment.

Steel Material

Steel material is selected according to the specified chain grade, manufacturing standard and required mechanical properties. Material identification and testing records are maintained according to the purchase specification.

Heat Treatment

Chain links are heat treated according to the specified material grade and manufacturing procedure to achieve the required mechanical properties.

Connecting Components

End links, joining shackles, anchor shackles and other connecting components can be specified according to the vessel's anchoring arrangement.


Description

Studless Link Anchor Chain is a marine chain consisting of interconnected steel links without transverse studs. It is used in anchoring systems where the chain design, dimensions and mechanical properties are specified according to the vessel's requirements.

Each link is formed with a closed steel profile and connected to adjacent links to create a continuous chain. The absence of a transverse stud distinguishes this chain from Stud Link Anchor Chain and affects its link geometry, weight and dimensional characteristics.

The chain specification normally includes nominal diameter, chain grade, link dimensions, material requirements, proof load, breaking load and connection arrangement.

Selection should be based on the vessel's approved anchoring system, applicable manufacturing standard, chain-handling equipment and required inspection documentation.

Studless Link Anchor Chain may be supplied for new vessel construction, marine equipment projects and replacement applications, subject to the specified design and technical requirements.



Studless-link-Anchor-Chain

Norminal

Diameter

(mm)

Proof Load (kN)
Grade2

Proof Load (kN)

Grade3
Breaking Load (kN)
Grade2
Breaking Load (kN)
Grade3
Weight per 27.5m
(kg)
16 107 150 150 216 158 
17.5 127 179 179 256 194 
19 150 211 211 301 236 
20.5 175 244 244 349 269 
22 200 280 280 401 322 
24 237 332 332 476 370 
26 278 389 389 556 431 
28 321 449 449 642 496 
30 368 514 514 735 564 
32 417 583 583 833 635 
34 468 655 655 937 712 
36 523 732 732 1050 800 
38 581 812 812 1160 887 
40 640 896 896 1280 1032 
42 703 981 981 1400 1084 
44 769 1080 1080 1540 1197 
46 837 1170 1170 1680 1310 
48 908 1270 1270 1810 1438 
50 981 1370 1370 1960 1546 
52 1060 1480 1480 2110 1661 
54 1140 1590 1590 2270 1791 
56 1220 1710 1710 2430 1926 
58 1290 1810 1810 2600 2086 
60 1380 1940 1940 2770 2249 
62 1470 2060 2060 2940 2361 
64 1560 2190 2190 3130 2516 
66 1660 2310 2310 3300 2676 
68 1750 2450 2450 3500 2885 
70 1840 2580 2580 3690 3010 
73 1990 2790 2790 3990 3274 
76 2150 3010 3010 4300 3548 
78 2260 3160 3160 4500 3737 
81 2410 3380 3380 4820 4030 
84 2580 3610 3610 5160 4334 
87 2750 3850 3850 5500 4650 
90 2920 4090 4090 5840 4976 
92 3040 4260 4260 6080 5199 
95 3230 4510 4510 6440 5544 
97 3340 4680 4680 6690 5780 
100 3530 4940 4940 7060 6143 
102 3660 5120 5120 7320 6398 
105 3850 5390 5390 7700 6773 
107 3980 5570 5570 7960 7033 
111 4250 5940 5940 8480 7569 
114 4440 6230 6230 8890 7983 
117 4650 6510 6510 9300 8409 
120 4850 6810 6810 9720 8863 
122 5000 7000 7000 9990 9143 
124 5140 7200 7200 10280 9598 
127 5350 7490 7490 10710 9908 
130 5570 7800 7800 11140 10382 



Product Details

Studless Link Anchor Chain5

Mechanical Properties


GradeYield Point (N/mm²,min)   Tensile Strength (N/mm²,min)Elongation (%,min)Reduction of Area (%,min)Temperature (℃)Impact Test(V-notch)  Impact  (J,min)
2 ≥295490~690≥22--0 ≥27
3 ≥410≥690≥17≥400 ≥60
≥50(weld)



Chain Equipment Tables

Stud Link Chain CablesAnchors for ShipTowing LinesMooring Lines
Grade 1 Diameter (mm)Grade2 Diameter (mm)Grade3 Diameter (mm)Total Length (m)NumberAnchor Weight (kg)H.H.P.Anchor Weight (kg)Length (m)MBL (kn)QuantityLength (m)MBL (kn)
 14 12.5--220 2 180 135180 1003 80 35 
 16 14--220 2 240 180180 1003 100 40 
 17.5 16--247.5 2 300 225180 100311040 
 19 17.5--247.5 2 360 270180 100311045 
 20.517.5--275 2 420 315180 100312050 
 22 19--275 2 480 360180 100312055 
 24 20.5--302.5 2 570 430180 110312060 
 26 2220.5 302.5 3 660 495180 130412065 
 28 2422 330 3 780 585180 150412070 
30 2624 357.5 3 900 675180 175414080 
 322824 357.5 3 1020 765180 200414085 
 34 3026 385 3 1140 855180 225414095 
 36 3228 385 3 1290 970180 2504140100 
 38 3430 412.5 3 1440 1080180 2754140110 
40 3430 412.5 3 1590 1195190 3054160120 
 423632 440 3 1740 1305190 3404160130 
 44 3834 440 3 1920 1440190 3704160145 
 46 4036 440 3 2100 1575190 4054160160 
48 4236 467.5 3 2280 1710190 4404170170 
504438 467.5 3 2460 1845190 4804170185 
 524640 467.5 3 2640 1980190 5204170200 
54 4842 495 3 2850 2140190 5604170215 
 565044 495 3 3060 2295200 6004180230 
 58 5046 495 3 3300 2475200 6454180250 
 60 5246 522.5 3 3540 2655200 6904180270 
 62 5448 522.5 3 3780 2835200 7404180285 
64 5650 522.5 3 4050 3040200 7854180305 
 665850 550 3 4320 3240200 8355180325 
 68 6052 550 3 4590 3445220 8905190325 
 70 6254 550 3 4890 3670220 9405190335 
 73 6456 577.5 3 5250 3940220 10255190350 
 76 6658 577.5 3 5610 4210220 11105190375 
78 68 60 577.5 3 6000 4500220 11705 190 400 
81 70 62 605 3 6450 4840240 12605 200 425 
84 73 64 605 3 6900 5175 240 13555 200 450 
87 76 66 605 3 7350 5515240 14555 200 480 
90 78 68 632.5 3 7800 5850260 1470 6200  480
92 81 70 632.5 3 8300 6225260 1470 6200  490
95 84 73 632.5 3 8700 6525260 14706200 500
97 84 76 660 3 9300 6975280 14706200 520
100 87 78 660 3 9900 7425280 14706200 555
102 90 78 660 3 105007875280 14706200 590
105 92 81 687.5 3   11100 8325300 14706200 620
107 95 84 687.5 3   11700 8775300 14706200 650
111 97 87 687.5 3   12300 9225300 14707200 650
114 100 87 715 3   12900 9675300 14707200 660
117 102 90 715 3   13500 10125300 14707200 670
120 105 92 715 3 1410010575300 14707200 680
122 107 95 742.5 3 1470011025300 14707200 685
124 111 97 742.5 3 1540011550300 14708200 685
127 111 97 742.5 3 1610012075300 14708200 695
130 114 100 742.5 3 1690012675300 14708200 705
132 117 102 742.5 3 1780013350 300 14709200 705
137 120 107 742.5 3 1880014100 300 14709200 715
--124 111 770 3 2000015000 300 14709200 725
--127 114 770 3 2150016125 300 147010200 725
--132 117 770 3 2300017250----------


Structure

Studless Link Anchor Chain is constructed from interconnected steel links without transverse studs. The link design provides a continuous load-bearing profile while allowing adjacent links to move relative to each other during chain deployment, recovery and handling.

The chain structure is determined by the link dimensions, cross-sectional geometry, contact surfaces and connection arrangement. These features influence how the chain articulates, passes through chain-handling equipment and connects with other components in the anchoring system.


studless-link-anchor-chain-structure


1. Studless Chain Link Design

The common link is the main structural component of Studless Link Anchor Chain.

Each link is formed without a transverse stud, leaving the internal opening clear for the adjacent link to pass through and articulate. The continuous link profile provides the structural connection between successive chain links.

The link design is based on the specified nominal diameter, steel cross-section, internal opening and dimensional tolerances.

Depending on the manufacturing specification, the chain link may be produced through a controlled forming and welding process, followed by the required heat treatment and inspection.

The link dimensions and manufacturing requirements determine the finished geometry and mechanical properties of the chain.


2. Link Dimensions and Chain Handling

The dimensions of each chain link are selected according to the required chain size and the configuration of the anchoring equipment.

Important dimensions include:

  • Nominal chain diameter

  • Inside link length

  • Outside link length

  • Inside link width

  • Outside link width

  • Link cross-sectional dimensions

  • Link pitch and dimensional tolerances, where specified

These dimensions determine the available clearance between adjacent links and influence the chain's movement during deployment and recovery.

For vessel anchoring systems, the chain dimensions should correspond to the chain wheel, chain stopper, chain pipe and other handling components.

A correctly specified link geometry allows the chain to pass through the intended equipment while maintaining the required articulation between links.


3. Link Contact and Articulation

Studless Link Anchor Chain is designed to allow movement between adjacent links.

During chain deployment and recovery, the links change their relative positions as the chain passes through the chain-handling equipment or follows the movement of the anchor.

The contact areas between links are influenced by the link curvature, cross-sectional profile and dimensional tolerances.

The internal and external radii of the links are therefore important manufacturing parameters. A controlled link profile helps maintain consistent contact geometry and reduces irregular contact caused by dimensional variation.

The finished chain should be checked against the applicable drawings and dimensional requirements to verify that the links maintain the specified geometry throughout the chain length.


4. Continuous Link Structure

The absence of a transverse stud gives Studless Link Anchor Chain a relatively simple link configuration.

Each link forms a continuous steel loop, with the connecting geometry established by the link profile and the specified manufacturing process.

The structural integrity of the link depends on the steel grade, cross-sectional dimensions, forming accuracy, weld quality where applicable, and heat treatment.

For welded chain links, the manufacturing process should control the joining area and maintain the required mechanical properties after heat treatment.

For forged or other manufacturing configurations, the applicable production and inspection requirements should be defined by the chain specification.

The finished link must meet the specified dimensional, mechanical and inspection requirements regardless of the manufacturing method.


5. Chain Flexibility and Movement

The articulation of Studless Link Anchor Chain is determined by the geometry of the individual links and their contact with adjacent links.

As the chain moves, each link can change its orientation within the available clearance. This allows the chain to follow the movement of the anchor and the path established by the vessel's anchoring equipment.

The resulting flexibility is a structural characteristic of the interconnected link design rather than a separate component.

For practical installation, the chain dimensions, connecting components and handling equipment should be considered together to confirm that the chain can move through the intended arrangement.

The required chain configuration should be verified against the vessel's anchoring system and operating conditions.


6. End Links and Connection Arrangement

End links provide the connection between the chain and other components of the anchoring system.

Depending on the specified arrangement, the chain may include enlarged end links, anchor shackles, joining shackles, swivel assemblies or other connecting components.

The dimensions of these components must correspond to the chain size and the required connection geometry.

For replacement chains, the existing end-link configuration should be checked before production. This includes the connection opening, link dimensions, shackle arrangement and required chain length.

Where a new anchoring system is being designed, the connection arrangement should be established according to the approved system drawings and equipment requirements.


7. Chain Configuration and Installation

Studless Link Anchor Chain can be supplied in continuous lengths or individual sections according to the purchase specification.

The required configuration depends on the vessel's anchoring arrangement, chain length, connection requirements and handling equipment.

For replacement projects, the existing chain arrangement provides a useful reference, but the actual dimensions and connection details should be verified before manufacturing.

For new installations, the chain length, end connections and associated components should be specified together to ensure compatibility with the complete anchoring system.

The final chain configuration should follow the approved drawings, applicable chain specification and agreed purchase requirements.

Technical note: Studless Link Anchor Chain should not automatically be described as having lower strength, lower service life or limited suitability for offshore mooring. These characteristics depend on the chain grade, dimensions, manufacturing process, mechanical properties, applicable standard and actual loading conditions. For offshore applications, the chain specification and certification requirements should be established by the project or system designer.




Material

The material of Studless Link Anchor Chain is selected according to the specified chain grade, manufacturing standard and service requirements. Steel quality, heat treatment and material consistency directly affect the chain's tensile properties, toughness and resistance to repeated loading.

For marine and offshore applications, the material specification should be established before production. The selected steel must meet the mechanical properties and inspection requirements defined for the intended anchoring or mooring system.


Steel Quality and Material Selection

Studless Link Anchor Chain can be manufactured using steel specified for marine chain applications, including applicable R3, R4 or R4S grades where required by the order.

Steel quality is controlled through the specified chemical composition and material acceptance criteria. Sulfur and phosphorus content, steel cleanliness and internal material consistency are important considerations when evaluating the suitability of the steel for chain manufacturing.

The material specification may cover:

  • Steel grade and applicable manufacturing standard

  • Chemical composition and impurity limits

  • Yield strength and tensile strength

  • Elongation and reduction of area

  • Impact toughness where specified

  • Material certification and heat-number identification

The selected steel grade should correspond to the required chain strength and operating conditions rather than being determined by nominal chain diameter alone.


Heat Treatment and Mechanical Properties

Heat treatment is an important part of Studless Link Anchor Chain manufacturing.

Depending on the specified steel grade and production procedure, the chain links may undergo controlled quenching and tempering to obtain the required combination of strength, toughness and ductility.

The heat-treatment process should provide consistent mechanical properties throughout the specified production batch.

Relevant controls include:

  • Heating temperature and holding time

  • Quenching conditions

  • Tempering temperature and duration

  • Cooling procedure

  • Batch identification and process records

  • Mechanical testing after heat treatment

The final properties should be verified against the applicable chain specification.

A properly controlled heat-treatment process helps the material maintain its required mechanical performance under tensile loading and repeated service loads. Actual fatigue performance, however, also depends on chain geometry, manufacturing quality, operating conditions and inspection history.


Continuous Link Section and Material Consistency

Studless Link Anchor Chain is manufactured without a transverse stud inside the link.

The link is formed from a continuous steel section, with its final geometry and mechanical properties determined by the specified material and manufacturing process.

Unlike stud link chain, the studless link does not contain a separate transverse stud or its associated stud-fitting arrangement.

This difference simplifies the link's internal configuration and eliminates the need to inspect a transverse stud connection.

The absence of a stud does not eliminate the need for material and dimensional inspection. The link body remains subject to forming, welding where applicable, heat treatment and other manufacturing requirements specified for the chain.

Material consistency should be assessed through the applicable production controls and mechanical test results.


Material Protection and Surface Finish

Studless Link Anchor Chain can be supplied with different surface finishes according to the operating environment and purchase specification.

Available finishes may include:

  • Hot-dip galvanized finish

  • Black painted finish

  • Uncoated steel finish

Hot-dip galvanizing provides a zinc coating that helps protect the steel surface from corrosion in marine environments.

The coating should be applied according to the specified process, with attention to surface preparation, coating coverage, thickness and adhesion requirements.

Black paint provides a surface coating according to the agreed paint system. Its performance depends on the coating specification, surface preparation and application quality.

Uncoated chain may be specified where the project requires a bare steel surface or where subsequent treatment will be carried out separately.

The appropriate finish should be selected according to the chain's exposure conditions, maintenance requirements and project specification.


Material Inspection and Traceability

Material inspection verifies that the steel used for Studless Link Anchor Chain conforms to the specified grade and manufacturing requirements.

Depending on the order and applicable classification requirements, inspection may include:

  • Review of material certificates

  • Verification of steel grade and heat number

  • Chemical composition testing

  • Mechanical property testing

  • Hardness testing where specified

  • Heat-treatment record review

  • Material identification and production traceability

Spectral analysis may be used for material identification or chemical composition verification where required by the inspection plan.

For orders requiring classification approval, material certificates and inspection records should correspond to the applicable chain grade, production batch and certification scope.

CCS, ABS, BV or other classification-related documentation may be provided when applicable to the order and agreed certification requirements.

The inspection scope should be confirmed before production to ensure that the material, testing and documentation requirements are consistent with the purchase specification.





How To Use?

Stud Link Anchor Chain: Operating and Maintenance Guidelines

Stud Link Anchor Chain should be used according to the vessel's anchoring arrangement, chain specification and operating procedure. Before operation, the chain condition, connection components and compatibility with the anchoring equipment should be checked.

Proper handling helps maintain the chain's working condition, reduce unnecessary impact loads and prevent damage caused by improper deployment, twisting or seabed contact.


1. Pre-Operation Inspection

Before deploying the anchor chain, check whether the chain specification and condition meet the requirements of the anchoring system.

The inspection should include:

Chain grade, nominal diameter and applicable product specification

Material and inspection certificates, where required

Chain links for visible cracks, deformation or abnormal wear

Surface condition, including damaged coating and corrosion

Connecting shackles and other accessories

Compatibility between the chain, anchor and chain-handling equipment

The specified chain grade and mechanical properties should correspond to the design requirements of the anchoring system.

The required proof load and breaking load should be verified against the applicable chain specification and equipment requirements. The chain should not be selected solely according to its nominal diameter or appearance.


2. Controlled Chain Deployment

During anchor deployment, the chain should be released in a controlled manner according to the vessel's anchoring procedure.

Sudden braking, excessive acceleration and uncontrolled chain release should be avoided. These operations can generate impact loads that are different from the normal tensile loads experienced during anchoring.

The chain should be allowed to run freely through the chain-handling equipment without unnecessary twisting or interference.

For Studless Anchor Chain, particular attention should be given to chain alignment because the links do not have transverse studs to help maintain their orientation.

If twisting or abnormal link positioning is observed, the condition should be corrected before continuing the operation.


3. Chain Position During Anchoring

After the anchor reaches the seabed, the chain arrangement should follow the vessel's approved anchoring procedure.

The deployed chain length and resulting chain geometry depend on water depth, vessel characteristics, environmental conditions and seabed conditions.

The chain should not be treated as a straight, continuously suspended connection between the anchor and vessel.

Where the anchoring arrangement requires part of the chain to rest on the seabed, the deployed length should provide the required chain geometry and load distribution.

The chain line should be maintained within the operating limits specified for the anchoring system.

The actual chain configuration should be assessed according to the vessel's anchoring arrangement rather than a fixed chain length or angle applied to every operating condition.


4. Chain Condition During Operation

During anchoring operations, the chain should be monitored for abnormal movement, twisting, excessive tension and contact with surrounding structures.

When wind, current or wave conditions change, the chain loading may also change.

The operating crew should observe the chain condition and follow the vessel's established procedures when the load or environmental conditions approach the permitted operating limits.

The chain should not be subjected to sustained loads exceeding its specified working requirements.

Where the chain passes over or contacts the seabed, the seabed characteristics should also be considered.

Sharp rocks, irregular surfaces and abrasive materials can cause local wear or damage to the chain links.

For operations involving abrasive or uneven seabeds, the anchoring arrangement should be evaluated before use.


5. Anchor Chain Retrieval

During anchor retrieval, the chain should be recovered at a controlled speed according to the vessel's operating procedure.

The chain should pass through the chain-handling equipment without excessive impact, compression or interference between links.

Abnormal twisting, overlapping links or uneven chain movement should be corrected before the chain is fully recovered.

The chain should not be forced through the equipment when link alignment or movement is restricted.

After retrieval, the chain should be arranged properly in the chain locker to avoid unnecessary entanglement and difficulties during the next deployment.


6. Cleaning and Storage

After marine operation, the chain should be inspected and cleaned according to its material and surface treatment requirements.

Seawater, mud and accumulated deposits should be removed where necessary.

The chain should be allowed to drain and should be stored in a condition suitable for the intended storage environment.

For galvanized chain, damaged coating and exposed steel areas should be checked during maintenance.

Where corrosion protection is required, the maintenance method should be compatible with the chain material, coating system and applicable inspection requirements.

Storage arrangements should prevent unnecessary mechanical damage, deformation and contact with sharp objects.


7. Matching the Anchoring System

Stud Link Anchor Chain should be used with an anchor and chain-handling equipment suitable for the specified chain dimensions and operating requirements.

Before installation or replacement, verify the compatibility of the following components:

Marine anchor

Anchor chain

Connecting shackles

Windlass and gypsy wheel

Chain stopper

Chain pipe and hawse pipe

Chain locker

The chain grade, dimensions and connecting components should be consistent with the approved anchoring arrangement.

Different chain grades or chain types should not be combined without confirming their compatibility and suitability for the intended load conditions.

For replacement projects, the existing chain specification, equipment profile and connection arrangement should be checked before ordering a new chain.


8. Common Operating Mistakes to Avoid

Using a chain beyond its specified load requirements

A chain with an unsuitable grade or insufficient mechanical properties should not be used for deep-water anchoring or demanding mooring conditions simply because its dimensions appear suitable.

Applying excessive impact during deployment or retrieval

Sudden braking, uncontrolled release and forced chain movement can generate additional loads and damage chain links.

Ignoring chain twisting

Twisted links can interfere with normal chain movement and create abnormal loading conditions. Chain alignment should be checked whenever irregular movement is observed.

Leaving the chain without appropriate maintenance

Prolonged exposure to seawater, deposits and unsuitable storage conditions can contribute to corrosion and surface deterioration.

Combining incompatible chain types or grades

Stud Link Anchor Chain, Studless Anchor Chain and other chain types should not be connected or mixed without confirming dimensional, mechanical and system compatibility.

Allowing continuous abrasive contact

Repeated contact with sharp rocks or abrasive seabed materials can reduce the effective link section through wear.

Where seabed contact is part of the anchoring operation, the potential for abrasion should be considered in the anchoring arrangement and inspection plan.


9. Routine Condition Monitoring

The condition of Stud Link Anchor Chain should be checked at intervals established by the vessel's maintenance and inspection requirements.

Inspection should focus on areas where mechanical damage, corrosion or wear is more likely to occur.

Relevant inspection items include:

  • Link dimensions and visible deformation

  • Localized wear and reduction in link section

  • Cracks or other visible surface defects

  • Corrosion and coating deterioration

  • Chain connections and accessories

  • Abnormal link alignment

  • Condition of chain-handling equipment

If a chain link shows suspected damage or abnormal deformation, the chain should be evaluated according to the applicable inspection procedure before further use.

Inspection and maintenance records should be retained where required by the vessel's maintenance system, project specification or applicable classification requirements.




Application

Studless Link Anchor Chain is used in marine anchoring, offshore mooring and positioning systems. Its application depends on the chain design, specified grade, seabed conditions and compatibility with the chain-handling equipment.


Application:

studless-link-anchor-chain-application


Offshore Floating Structures

Used in mooring systems for FPSOs, floating wind turbines, semi-submersible platforms and other floating offshore structures.

For permanent mooring projects, chain selection should consider the design loads, mooring configuration, water depth, seabed conditions and specified chain grade.


Deepwater and Ultra-Deepwater Projects

Used in offshore projects where chain handling involves large winches, chain guides and other dedicated equipment.

The studless link design provides an unobstructed link profile, which may help reduce interference during chain passage. Its suitability depends on the chain dimensions, equipment design and operating conditions.


Temporary Mooring for Offshore Vessels

Used in temporary anchoring and positioning systems for offshore construction vessels, crane vessels, pipelay vessels and other marine working vessels.

Chain specifications should be selected according to the vessel's anchoring arrangement, operating loads, required chain length and project conditions.


Buoy and Marine Equipment Positioning

Used in anchoring and positioning systems for port buoys, navigation buoys, dredging equipment, floating barriers and temporary marine structures.

The required chain length, grade, connection arrangement and seabed holding conditions should be confirmed according to the installation design.


Soft Seabed Mooring

Suitable for selected mooring applications on sand, mud and soft clay seabeds, where the chain forms part of an engineered anchoring or mooring system.

Chain selection should consider seabed interaction, expected loads, movement of the floating structure and the required service life.


Chain Handling Systems

Used in systems where smooth chain passage and compatibility with the handling equipment are important.

The absence of a transverse stud provides a different link profile from stud link chain. Compatibility with the windlass, chain guide, stopper and storage arrangement should be checked before installation.


Low-Impact Chain Handling

Used in selected systems where controlled chain movement, reduced link interference and stable chain handling are required.

Actual noise, impact and wear performance depend on the equipment configuration, chain condition, operating speed and applied loads. These factors should be evaluated during system design rather than determined by chain type alone.


Mooring System Replacement

Used for replacement or renewal of existing studless anchor or mooring chains during vessel maintenance, offshore equipment refurbishment and project upgrades.

Replacement specifications should include chain diameter, grade, length, link dimensions, end connections and compatibility with the existing chain-handling equipment.





How to Select Studless Link Anchor Chain?

Studless Link Anchor Chain should be selected according to the required load capacity, operating conditions, chain handling equipment and installation arrangement.

For replacement or new installation, the selection should be based on the approved anchoring or mooring system specification rather than nominal chain diameter alone.


1. Match Chain Strength to the Required Load

The chain should have sufficient strength for the loads specified in the anchoring or mooring system design.

Selection should consider:

Required chain grade and nominal diameter

Specified proof load and minimum breaking load

Static and dynamic loading conditions

Applicable design factors and classification requirements

The required chain strength should be determined from the system specification.

A higher chain grade should not be selected solely to increase strength without checking the compatibility of the connecting components and chain-handling equipment.


2. Consider the Operating Environment

The operating environment affects chain wear, corrosion and service life.

For offshore installations, selection should consider water depth, seabed conditions, wave and current loading, and the intended service period.

For conventional vessel anchoring, the required chain specification should correspond to the vessel's approved anchoring arrangement and operating conditions.

Seabed conditions should also be considered.

Rocky, abrasive or uneven seabeds may increase local wear and damage to chain links. Where these conditions are expected, the chain configuration, inspection requirements and maintenance arrangements should be reviewed before selection.


3. Verify Chain Wheel and Handling Equipment

Studless Link Anchor Chain should be compatible with the chain wheel and associated chain-handling equipment.

Before ordering, confirm:

Chain wheel pocket dimensions

Link profile and dimensional tolerances

Chain wheel and guide arrangement

Chain stopper compatibility

Available clearance through the chain pipe and hawse pipe

For replacement projects, the existing chain wheel should be checked against the proposed chain dimensions.

A dimensional mismatch may cause poor seating, abnormal wear or irregular chain movement during operation.


4. Confirm Material and Manufacturing Requirements

Material requirements should correspond to the specified chain grade, manufacturing standard and service conditions.

The buyer should confirm the required material properties and manufacturing controls before production.

Depending on the applicable specification, these may include:

Chemical composition

Mechanical properties

Heat treatment requirements

Material identification and traceability

Welding and manufacturing requirements

For offshore mooring applications, the chain specification should be reviewed against the project design and applicable classification requirements.

Material selection should not be based on chain diameter or product name alone.


5. Select the Appropriate Surface Protection

Surface protection should be selected according to the operating environment, corrosion exposure and maintenance requirements.

Hot-dip galvanizing may be specified for applications requiring a zinc coating for corrosion protection.

Paint or other coating systems may be used where required by the project specification.

The buyer should confirm the coating type, surface preparation, coating thickness and inspection requirements before production.

For submerged service or offshore mooring applications, the coating system should be assessed against the actual exposure conditions and project requirements.


6. Determine the Chain Configuration

The chain configuration should correspond to the installation arrangement and maintenance requirements.

The buyer should confirm whether the chain is supplied as a continuous length or divided into sections.

Where required, the configuration may include:

Connecting shackles

Enlarged end links

Swivel assemblies

Anchor connection components

Defined section lengths

For segmented chain arrangements, the connection positions and component dimensions should be confirmed before production.

The configuration should also allow the chain to be inspected, handled and replaced according to the installation requirements.


7. Define Inspection and Documentation Requirements

Inspection requirements should be agreed before manufacturing begins.

The required inspection scope depends on the chain specification, applicable standard, classification requirements and purchase order.

Documents may include:

Material certificates

Manufacturing and heat-treatment records

Dimensional inspection records

Proof load test reports

Mechanical test results

NDT reports, where specified

Classification inspection and certification, where required

The buyer should confirm the required certificate type, inspection stage and acceptance criteria before placing the order.


Selection Considerations

Studless Link Anchor Chain selection should consider the complete installation rather than the chain alone.

The chain, connecting components, chain wheel, handling equipment and operating conditions should be reviewed together.

For replacement projects, existing equipment dimensions and the original chain specification should be checked before confirming the new chain.

For new installations, the chain specification should follow the approved system design and applicable technical requirements.

A complete purchase specification helps avoid dimensional incompatibility, incorrect chain configuration and inspection requirements that are not defined before production.





How To Choose A Reliable Supplier?

How to Evaluate a Studless Link Anchor Chain Supplier

When purchasing Studless Link Anchor Chain, buyers should look beyond the quoted price and confirm how the supplier manages manufacturing, inspection, documentation and delivery.

For shipbuilding, marine engineering and offshore projects, the supplier should understand the technical requirements of the chain and be able to coordinate the manufacturing process with the buyer's specification.

Richmax works with qualified manufacturing resources and provides support for product selection, factory coordination, inspection arrangements and export documentation.


Our Workshop:

studless-link-anchor-chain-workshop


1. Factory Qualification and Product Approval

The buyer should confirm whether the manufacturing facility is approved for the required anchor chain type, grade and applicable classification requirements.

For Studless Link Anchor Chain, factory qualification should be checked against the actual product specification rather than based on a general statement that the factory produces marine chains.

Richmax can coordinate with manufacturing partners to verify applicable CCS, ABS, BV or LR factory approval documents, including the approved product scope and validity.

For orders requiring U1, U2 or U3 chain, the applicable grade, manufacturing standard and certification requirements should be confirmed before quotation and production.

Factory approval documents should correspond to the actual manufacturing facility responsible for the order.


2. Production Control and Inspection Coordination

A reliable supplier should be able to explain how production is monitored and how inspection requirements are communicated to the factory.

For Studless Link Anchor Chain, production follow-up may cover:

Material preparation and heat-number identification

Link forming and welding, where applicable

Heat treatment and dimensional calibration

Chain assembly and connecting components

Surface treatment and final inspection

Richmax can coordinate production follow-up, third-party inspection and surveyor attendance according to the agreed inspection scope.

Inspection arrangements should be confirmed before production, including the required inspection stages, testing procedures and acceptance criteria.

Where witness testing or independent inspection is required, the supplier should coordinate the schedule with the factory and the appointed inspection party.


3. Material Traceability and Certificate Verification

Material traceability is an important part of anchor chain procurement.

The buyer should confirm whether material identification, production batch records and test results can be linked to the supplied chain.

Richmax coordinates the verification of relevant heat numbers, batch identification and inspection records against the order requirements.

For orders requiring classification certification or material documentation, the corresponding records should be checked against the actual production batch and supplied chain.

The documentation scope may include:

Material certificates

Heat-number and batch records

Mechanical test results

Proof load and breaking load test records, where required

Classification inspection records and certificates, where applicable

The required documents should be agreed before production to avoid discrepancies during final inspection or delivery.


4. Technical Understanding and Equipment Compatibility

The supplier should understand the difference between Studless Link Anchor Chain and Stud Link Anchor Chain.

These chain types have different link geometries and should not be substituted without checking the vessel's approved anchoring arrangement.

For replacement orders, the buyer should provide the available chain specifications, equipment details or existing chain dimensions.

Richmax can assist with checking:

Chain type and specified grade

Nominal diameter and link dimensions

Chain length and connecting arrangement

Windlass and chain wheel compatibility

Required joining shackles, end connections and swivel assemblies

For U1, U2 and U3 chain requirements, the applicable grade and technical specification should be confirmed from the purchase documents and relevant manufacturing standard.

Selection should be based on the actual equipment and service requirements rather than nominal diameter alone.


5. Project Documentation and Delivery Preparation

For marine and offshore orders, documentation requirements should be established before production.

The supplier should understand which records are required for inspection, shipment, customs clearance and project acceptance.

Richmax can coordinate the preparation and checking of the agreed export and technical documents, including:

Product specifications and approved drawings

Material certificates

Inspection and test reports

Classification documents, where required

Packing lists and commercial invoices

Shipping and customs documentation

For project orders, chain marking, identification, sectional delivery and accessory matching can be coordinated according to the buyer's requirements.

Where connecting shackles, joining links or swivel assemblies are included, their specifications should be checked against the chain arrangement before shipment.


6. Production Schedule and Delivery Risk Control

A reliable supplier should provide a realistic production schedule and communicate changes that may affect delivery.

Anchor chain production involves several stages, including material preparation, forming, heat treatment, calibration, testing and final inspection.

Richmax coordinates with manufacturing partners to follow the agreed production schedule and communicate relevant progress to the buyer.

If dimensional deviations, surface treatment issues or test results do not meet the agreed requirements, the supplier should coordinate corrective action with the factory before shipment.

Production delays, inspection arrangements and documentation requirements should be discussed early, particularly for replacement orders and project deliveries with fixed installation schedules.


Our Manufacturing Process:

studless-link-anchor-chain-manufacturing-process


7. Technical Support and After-Sales Coordination

The supplier should be able to support the buyer when technical questions arise during quotation, production or delivery.

Richmax can assist with reviewing chain specifications, confirming the required grade, checking equipment compatibility and coordinating technical questions with the manufacturing facility.

For project orders, the technical review should consider the intended application, approved anchoring arrangement, chain dimensions and applicable inspection requirements.

The supplier should also establish a clear process for handling quality issues, document discrepancies and delivery claims.

Where a problem requires factory investigation, Richmax coordinates communication between the buyer and the responsible manufacturing partner and follows up on the agreed corrective actions.

The objective is to maintain clear responsibility for communication, inspection follow-up and resolution throughout the order process.




studless-link-anchor-chain-faq

FAQ

1. What is Studless Link Anchor Chain?

Studless Link Anchor Chain is a marine chain consisting of interconnected steel links without transverse studs.

It is used in anchoring systems where the chain type, dimensions and mechanical properties are specified according to the vessel's requirements.


2. What is the difference between Studless and Stud Link Anchor Chain?

Stud Link Anchor Chain contains a transverse stud inside each link.

Studless Link Anchor Chain does not contain this transverse stud.

The two chain types have different link geometries and dimensional characteristics. Selection should follow the vessel's anchoring arrangement and equipment requirements.


3. What chain grades are available?

Available grades depend on the applicable manufacturing standard and production specification.

The required grade should be identified in the purchase specification and verified against the vessel's technical requirements.


4. Can Studless Anchor Chain be supplied with shackles?

Yes, connecting components may be included according to the purchase specification.

The required shackle type, dimensions and connection arrangement should be confirmed before production.


5. Can the chain be used for replacement projects?

Yes, provided the supplied chain matches the required chain type, grade, dimensions and connection arrangement.

For replacement orders, existing chain measurements and equipment specifications should be checked before ordering.


6. What certificates can be provided?

The available documentation depends on the applicable standard, classification requirements and purchase specification.

Material certificates, mechanical test reports, inspection records and classification documents may be required.


7. Is Studless Anchor Chain suitable for offshore mooring?

Suitability depends on the chain design, grade, specified mechanical properties and project requirements.

The product name alone does not establish suitability for offshore mooring applications.

The chain should be selected according to the approved system design and applicable technical specification.


Quality Inspection

Quality control for Studless Link Anchor Chain starts with the review of order requirements and continues through material verification, production inspection, testing and final delivery checks.

The inspection plan should be based on the specified chain grade, nominal diameter, manufacturing standard and classification requirements. Material records, test results and product markings must correspond to the chain supplied.


1. Order Specification and Document Review

Before production, the order specification and relevant manufacturing documents should be checked against the buyer's requirements.

The review may cover:

Applicable manufacturing standard and chain grade, including U1, U2 or U3 where specified

Factory approval and classification documents required for the order

Material certificates, heat numbers and batch identification

Studless link geometry and dimensional requirements

Required mechanical tests, inspection methods and acceptance criteria

Documents for Stud Link Anchor Chain should not be used as supporting records for Studless Link Anchor Chain without confirming that they apply to the actual product and order.

Any discrepancy between the quotation, approved specification and manufacturing documents should be clarified before production proceeds.


2. Production Process Inspection

Inspection during manufacturing helps identify deviations before the chain reaches final testing.

Depending on the production arrangement and agreed inspection plan, the inspection may cover steel material preparation, link forming, welding where applicable, heat treatment, surface treatment and dimensional checks.

Particular attention should be given to:

Conformity of raw materials with the specified grade

Link geometry and dimensional consistency during production

Heat-treatment records and process parameters

Surface preparation and galvanizing quality, where specified

Identification and segregation of different grades, sizes and production batches

For orders requiring independent verification, arrangements may be made for a classification surveyor or third-party inspector to witness designated manufacturing or testing stages.


3. Surface and Dimensional Examination

Finished chain links should be examined for dimensional conformity and visible surface conditions.

Dimensional checks may include nominal diameter, link pitch, inside length, outside length, inside width and outside width. Results should be compared with the tolerances specified by the applicable standard.

Visual examination should focus on cracks, pores, folds, surface damage, abnormal deformation and other unacceptable manufacturing defects.

For galvanized chain, the coating should also be checked for bare areas, peeling, uneven coverage and handling damage, as applicable to the specified coating requirements.

Visual inspection alone cannot confirm the absence of internal defects or other conditions requiring specialized testing. Additional examination should be arranged where required by the standard or inspection plan.


4. Mechanical Testing and Inspection Witness

Mechanical testing should follow the requirements established for the ordered chain grade and diameter.

Depending on the specification, the inspection program may include proof load testing, breaking load testing, tensile properties, elongation, reduction of area and impact testing.

Where low-temperature impact performance is specified, the test temperature, specimen requirements and acceptance values should be verified against the applicable standard.

The buyer may arrange witnessed testing through the relevant classification society or an independent inspection agency when required by the contract.

Test reports should identify the applicable chain grade, size, production batch or test sample, together with the results and required inspection endorsements.


5. Material Verification and Traceability

Material verification should establish a clear link between the supplied chain and its manufacturing records.

Depending on the order requirements, checks may include material certificate review, heat-number verification, chemical composition analysis, mechanical test records and heat-treatment documentation.

Spectrometric rechecking may be arranged when required by the inspection plan or when material identification needs further confirmation.

Heat numbers and batch references should be checked against the relevant production and test records. Where material identification is required on individual components or chain sections, the identification method should follow the approved procedure.

This helps prevent documentation from one grade, batch or product type from being incorrectly applied to another.


6. Sampling and Accessory Inspection

Finished-product sampling should follow the applicable standard, classification requirements and agreed inspection plan.

Selected samples or test specimens may be used to verify specified mechanical properties and other acceptance requirements. Sampling frequency should not be assumed to be identical for every chain size, grade or order.

When shackles, swivels or other connecting components are supplied with the chain, their dimensions, markings, material documentation and applicable test records should also be checked.

The inspection should confirm that the supplied accessories match the ordered specifi


Our Classification Society Inspection:

studless-link-anchor-chain-classification-society-inspection

Leave A Message

Get Quote
GET A QUOTE

+8618669705333

+86-532-88987597

export@qdrichmax.com