A price quote tells you little until you know exactly what chain it covers. One company may manufacture marine anchor chain; another may source offshore mooring chain from a partner factory. Before comparing bids, confirm the actual maker, link form, grade, diameter, required tests, and certificate scope.
The companies below cover different products and supply models. Use the comparison to narrow your options, then check each offer against your project specification. Powerful Machinery publishes this guide and appears in the list. If you already have a drawing and chain schedule, review its mooring chain product specifications or send the documents for a quote.
Mooring Chain Manufacturers and Suppliers at a Glance
| Company | Country | Business type | Publicly described chain range | Best initial fit |
| Powerful Machinery | China | Direct manufacturer | Stud link and studless anchor chain; G30/G70 range subject to type and diameter | Discussing a confirmed G30/G70 marine chain specification and matched connecting hardware |
| Qingdao Anchor Chain | China | Manufacturer | Grade 2/3 marine anchor chain; R3–R4S offshore mooring chain | Comparing documented marine and offshore ranges |
| Jiangsu Asian Star Anchor Chain | China | Manufacturer | Ship anchor chain, stud link and studless offshore mooring chain | Large offshore or ship chain procurement requiring grade-specific approval review |
| Vicinay Marine | Spain | Manufacturing group | Large-diameter offshore mooring chain and connectors | Large-diameter offshore chain and connectors; confirm the nominated facility |
| Ramnäs Offshore (Vicinay group) | Sweden | Manufacturer | Stud link and studless offshore chain; preferred 76–165 mm range | Specified offshore chain and accessories in larger diameters |
| Offspring International | United Kingdom | Specialist supplier and system provider | Stud link and studless offshore grades supplied through manufacturing partners | Integrated mooring equipment and project supply coordination |
These are different product ranges, not interchangeable alternatives. Vicinay Marine and Ramnäs Offshore are affiliated; their entries describe different operations within the same group. Before shortlisting a product, check the current approval scope for its grade, diameter, and manufacturing site.
For a G30 or G70 enquiry, see Powerful Machinery’s mooring chain range.
Mooring Chain Manufacturer vs Supplier: What Is the Difference?
A direct manufacturer makes the chain and can explain its production records, dimensional controls and testing plan. This route can be useful for a specified link form, repeat order, or defined document package. Manufacturing the chain does not mean every grade or class approval is available.
A stock supplier or distributor may suit a smaller order or shorter regional delivery. Ask who made the chain, whether the stock can be traced to its original heat and production batch, and whether its certificates match the requested grade and dimensions.
A system supplier may source chain, connectors, and anchors from several producers for one project. Confirm the manufacturer and documentation for each critical item. Compare bids against the same specification and delivery scope.
How This Shortlist Was Compiled
Powerful Machinery publishes this guide and is included in the comparison. The other entries draw on official company and product information. This is a sourcing shortlist, not a performance ranking or endorsement. Check current product ranges, manufacturing sites, and approval schedules before ordering.
Manufacturers to Evaluate
Powerful Machinery — Direct Manufacturer in China
Powerful Machinery confirms that it directly manufactures stud link and studless link anchor chain, and offers G30 and G70 within its range. Availability depends on the chain type and diameter: studless chain spans 16–50 mm, while stud link chain spans 17.5–130 mm. Ask which grade is offered at your required size. The overall 16–130 mm range does not apply to every type.
For a stud link order, specify the relevant ISO 1704 edition and dimensions in the RFQ; ISO 1704 defines stud-link component geometry and is not a general studless-chain standard.
ABS, DNV or Lloyd’s Register (LR) certificates may be available for applicable products and orders; request confirmation of the exact document and scope before ordering. The catalogue shows common, enlarged and end links, Kenter and joining shackles, an anchor shackle and a swivel.
Confirm the proposed parts and their fit with your chain. For a G30/G70 enquiry, review the studless anchor chain range where relevant and send the chain schedule. If your project specifies an offshore R grade, request a separately verified product; do not substitute G30 or G70.
Qingdao Anchor Chain — Marine and Offshore Chain Manufacturer
Qingdao Anchor Chain lists Grade 2 and Grade 3 marine anchor chain and accessories from 12.5 to 152 mm. It separately lists offshore mooring chain in R3, R3S, R4, and R4S up to 165 mm, in stud link and studless forms. The company publishes factory approvals, but each approval has its own product and size scope.
Consider the company when the enquiry includes marine anchor chain or one of its listed offshore grades. Ask for the current approval schedule, the required test plan, and a drawing of the end arrangement. Official product information.
Jiangsu Asian Star Anchor Chain — Chain Manufacturer
Asian Star lists ship anchor chain, stud link and studless offshore mooring chain, and connecting parts. Its published DNV manufacturer approval sets grade- and size-specific limits. Check the current certificate schedule for the exact chain you need.
For an offshore order, ask which factory will make the chain and request its current approval, accessory specifications, and inspection plan. For ship anchor chain, ask for the applicable ship-chain requirements and the certificate for the delivered product. Official product range.
Vicinay Marine — Mooring Chain Manufacturing Group
Vicinay Marine describes production of offshore chain and connectors up to 220 mm in grades R3 through R6, including intermediate grades. These are group-level claims; confirm which facility can make the specified chain and holds the required approval. Ramnäs Offshore, listed separately below for its Swedish facility and preferred size range, is part of the Vicinay Marine group.
For a large-diameter offshore project, send Vicinay the grade, diameter, connector drawings, test requirements, and delivery schedule. Request the approval and documentation for the nominated facility. Official manufacturing overview.
Ramnäs Offshore — Offshore Chain Manufacturer
Ramnäs Offshore, a Vicinay Marine group company in Sweden, makes stud link and studless offshore mooring chain and accessories. It describes 76–165 mm as its preferred production range. That range alone does not establish availability for every grade or delivery date.
For a large-diameter enquiry within that range, request the current approval schedule, chain and connector drawings, inspection plan and production slot. Official mooring-chain page.
Specialist Mooring Chain Supplier
Offspring International — System and Chain Supply
Offspring International supplies stud link and studless offshore mooring chain in R3, R3S, R4, R4S and R5, up to 220 mm, through manufacturing partners. It also supplies related mooring equipment. It is a project supplier here, not the chain manufacturer.
For a package with chain and other mooring equipment, ask Offspring to name the producing facility, confirm who manages technical deviations, and provide the manufacturer approval, test plan, traceability records, and order certificates. Official offshore chain information.
How to Evaluate a Mooring Chain Manufacturer?
Start with the approved application and specification. A ship’s anchor chain and a permanent offshore station-keeping chain can follow different grade and approval requirements. State the duty, design loads, environment, and required class or project authority. A product name alone is not enough to select the grade.
Confirm the producing facility and the proposed link form, grade, nominal diameter, dimensions, length, end arrangement, and connectors. Check compatibility with the chain wheel or stopper if one is used. Have the project engineer approve any proposed change in grade or link form.
Request the current manufacturer approval and its schedule where class approval is required. Ask how material heats, chain lengths, and connectors will be traced. Put dimensional inspection, proof and breaking tests, any mechanical or nondestructive tests, and witness points into the purchase specification. The applicable standard and approved procedure set the test levels and sampling.
Compare what the price includes: connectors, testing, surveyor attendance, packing, and document delivery may appear as separate items. Require one complete record set for the chain and its accessories. For the wider application, see marine and offshore products.
Mooring Chain Grades and Standards: Match the Project Specification
Powerful Machinery confirms G30 and G70. Offshore R3, R3S, R4, R4S, and R5 are different grade designations used for specified offshore chain. Do not treat a G30 or G70 chain as a substitute when the project calls for an R grade. Follow the approved engineering and class requirements. The mooring chain grades guide offers background, but the project documents control the purchase.
ISO 1704:2022 sets shapes, proportions, dimensions, and tolerances for stud-link anchor-chain components. It does not establish a general studless specification or, on its own, prove a chain’s grade, strength, or approval.
ISO 20438:2017 addresses grades, materials and dimensions for offshore mooring chains; cite it in an order only when the project requires it, and the quoted product meets it. Specify the applicable document and edition for each product. See the ISO 1704 record and ISO 20438 record.
A manufacturer approval, a type approval, and a certificate for the delivered chain serve different purposes. If the project requires ABS, DNV, or LR documentation, state the society and exact certificate and witness requirements in the RFQ. Powerful Machinery’s certificate availability is conditional on the product and order; check the proposed scope before purchase.
Testing, Inspection and Documentation
Agree on inspection and acceptance before production. Request material identification, applicable manufacturing and heat-treatment records, link and connector dimensions, surface checks, and records of the specified proof and breaking tests. If a class surveyor or third party must witness a step, identify the hold point and booking responsibility. Record how any repair or rejected link will be handled.
At receipt, match chain markings and certificate numbers to the packing list and delivered lengths. Check link form, measured dimensions, surfaces, fitted studs, and connector compatibility against the approved drawing. Escalate cracks, deformation, or unexplained repairs under the project procedure; a visual check cannot replace required tests. Use the separate mooring chain inspection guide for a more detailed checklist.
What to Include in a Mooring Chain RFQ
Send the project specification and drawings with the RFQ so each bidder prices the same chain, accessories, tests, and documents.
| RFQ item | Buyer should specify |
| Application | Vessel anchor chain, port or marine mooring, or a specified offshore system |
| Chain | Stud link or studless; grade and the engineering basis for selection |
| Dimensions | Diameter, link drawing/tolerances, total length and number of lengths |
| Standard | Applicable edition and requirements: ISO 1704 for stud-link dimensions; ISO 20438 for offshore mooring chain only if specified and supported by the quoted product; other project rules as required |
| Ends and hardware | Common/enlarged/end links, Kenter or joining shackle, anchor shackle, swivel; drawings and interface sizes |
| Testing and inspection | Proof/break testing and any mechanical or NDT scope, witnessing and acceptance plan |
| Certificates | Material and test records; ABS, DNV or LR class document type if required |
| Finish and marking | Surface finish, marking, packing and preservation requirements |
| Commercial details | Quantity, destination port, requested date and Incoterms |
For a G30/G70 enquiry, send the chain schedule and required documents through Powerful Machinery’s contact page. Ask the team to confirm the available type, size, connectors, and certificate scope before it quotes. For an offshore R-grade requirement, seek a manufacturer approved for that grade.
FAQs
What is the difference between a mooring chain manufacturer and a supplier?
A manufacturer makes the chain. A supplier may stock it or source it from another factory. Either can serve the project if you can identify the maker and obtain the required traceability and certificates.
What grade of chain should I use for mooring?
Use the grade in the approved engineering or vessel documents and applicable class rules. Powerful Machinery confirms G30/G70; offshore projects may specify R grades. Confirm the precise grade and approval before ordering.
How do stud link and studless chain differ?
A stud link has a crosspiece; a studless link does not. The link form affects dimensions and how the chain fits a wheel, stopper, or connector. Follow the approved system drawing and confirm grade and size separately.
What certificates should I request?
Request the certificate named in the contract, plus the required material, test, and inspection records. Check that it covers the delivered product. A factory approval or ISO 9001 certificate does not replace an order-specific product certificate.
How can I verify a manufacturer’s production capability?
Ask for the producing site, applicable size and grade range, current approval schedule where required, traceability plan, and test plan. Confirm who makes the connectors and how their records will be supplied.
What should I inspect when the chain arrives?
Match the chain’s markings, length, grade, and certificate identifiers with the order and packing list. Check its link form, dimensions, surface and connectors against the approved drawing. Resolve any damage or mismatch before use.
What information produces an accurate quotation?
Provide the application, grade, link form, diameter, length, drawing, standard, connectors, tests, certificates, quantity, destination, and delivery date. If you lack a detail, attach the available engineering documents and flag the open item.
