DIN 81860 Anchor Chain Cable Clench Releaser | Watertight / Non-Watertight End

Product Specification

DIN 81860 Anchor Chain Cable Clench Releaser | Watertight / Non-Watertight End Fastening

Product Overview

The DIN 81860 anchor chain cable clench releaser is an end fastening device for anchor chain cables on board ships. It is normally arranged at the inboard end of the anchor chain in the chain locker system, where the chain end must be secured during normal service and released when the vessel needs emergency anchor chain discharge.

This page covers watertight and non-watertight supply options. The watertight version is selected when sealing performance is required around the chain locker or related watertight boundary, while the non-watertight version is used where the installation drawing does not require a sealing function. Final standard edition, chain grade, material grade, installation interface, release arrangement, and watertight test requirement should be confirmed before production.

Quick Specifications

• Product type: anchor chain cable clench / anchor chain releaser / end fastening → secures the inboard chain end and allows emergency release according to vessel arrangement.
• Standard reference: DIN 81860-1999 as supplied by the project → current DIN 81860-1 / DIN 81860-2 editions can be checked if the shipyard requires the latest standard.
• Nominal chain diameter: 36 mm to 152 mm in the supplied table → suitable for a wide range of ship anchor chain sizes.
• Anchor chain grade: applicable to Grade 2 and Grade 3 anchor chains → final chain grade and class approval scope should be confirmed by project specification.
• Watertight option: watertight or non-watertight version → watertight function test, pressure, duration, and witness requirement must be confirmed before order.
• Material options: C-Mn steel, cast steel, or stainless steel → exact material grade, heat treatment, and traceability should follow project requirement.
• Surface treatment: Sa 2.5 blasting + one layer epoxy shop primer, galvanized, stainless steel polished, or customized coating → final finish should match vessel coating plan.
• Certificate scope: maker certificate, material certificate, class inspection, and watertight test record available according to order requirement.

Main Technical Parameters

Selection & Inquiry Guide

• Step 1: Confirm DIN 81860 standard edition, product name, and whether the project requires watertight or non-watertight construction.
• Step 2: Confirm nominal chain diameter, chain grade, end link arrangement, and whether the product is for newbuilding, repair, or replacement.
• Step 3: Confirm installation position, chain locker / bulkhead interface, available operating space, release direction, and surrounding reinforcement by drawing.
• Step 4: Confirm material requirement: C-Mn steel, cast steel, stainless steel, or special project material with certificate traceability.
• Step 5: Confirm surface treatment and inspection scope: shop primer, galvanized finish, stainless steel polishing, class inspection, and watertight function test if required.
• Step 6: Provide quantity, delivery destination, required delivery time, vessel type, classification society requirement, GA drawing, and reference photos if available.

Structure

Cable clench body | Chain end fastening interface | Release / slip arrangement | Operating or release access | Watertight sealing option | Non-watertight option | Chain locker / bulkhead installation interface | Surface protection

Chain Locker Safety & Engineering Advantages

• The DIN 81860 dimensional range helps match the end fastening device with the specified anchor chain diameter, reducing ambiguity during replacement or quotation.
• Watertight and non-watertight versions can be separated at the inquiry stage, which avoids using a non-sealing product where the vessel arrangement requires watertight integrity.
• The device supports emergency chain release logic: the anchor chain end is normally secured, and the end connection can be released when the vessel arrangement requires anchor sacrifice under dangerous conditions.
• For watertight projects, sealing structure, gasket or O-ring detail, test pressure, test duration, and class witness scope should be confirmed instead of assuming one universal test condition.
• Material selection can be adjusted for C-Mn steel, cast steel, or stainless steel projects, but the exact grade, welding / casting process, and certificate traceability should be defined before production.
• Surface preparation such as Sa 2.5 blasting and epoxy shop primer helps provide a controlled base condition for final vessel coating, while galvanized or stainless steel polished finishing can be discussed when specified.
• For replacement projects, the existing chain locker interface, hole position, end link connection, and available operating clearance should be checked before confirming interchangeability.

Custom Attributes

• Standard: DIN 81860-1999 → use when the shipyard or owner specification requires this German standard anchor chain end fastening.
• Current Standard Check: DIN 81860-1 / DIN 81860-2:2022 → confirm whether the project still requires the 1999 edition or the latest DIN edition.
• Version: Watertight / Non-watertight → choose according to chain locker boundary, sealing requirement, and installation drawing.
• Nominal Chain Diameter: 36–152 mm → select strictly according to anchor chain size and end link arrangement.
• Anchor Chain Grade: Grade 2 / Grade 3 as supplied → final grade, class rule basis, and acceptance requirement should be confirmed.
• Material: C-Mn steel / cast steel / stainless steel → exact grade and certificate scope to be confirmed before order.
• Watertight Function Test: Available according to project requirement → pressure, duration, inspection method, and witness requirement to be confirmed.
• Surface Treatment: Sa 2.5 blasting + epoxy shop primer / galvanized / customized → final surface condition should follow vessel coating specification.
• Certificate Requirement: Available upon request → class certificate, maker certificate, material certificate, and test record are arranged according to confirmed order scope.

How It Works

Anchor chain end is connected to the clench releaser → Chain end remains secured during normal service → Operator activates the release arrangement when emergency discharge is required → Chain end is released from the fastening point → Anchor and chain can run out according to the vessel emergency procedure

Applications

Anchor chain locker | Anchor chain end fastening | Emergency anchor chain release system | Ship anchoring arrangement | Commercial vessels | Newbuilding projects | Repair and replacement projects | Watertight or non-watertight chain locker installations

Certifications & Advantages

Certificates can be arranged according to project requirement, inspection scope, material traceability, watertight test requirement, 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 is the difference between the watertight and non-watertight version?

A1: The watertight version is used when the installation requires sealing around the chain locker or related watertight boundary. The non-watertight version is used where no sealing function is required. Test pressure, test duration, sealing details, and class witness requirement must be confirmed for watertight projects.

Q2: Is this product the same as a deck chain stopper?

A2: No. A DIN 81860 anchor chain cable clench releaser is an end fastening / release device for the inboard anchor chain end. A chain stopper is normally arranged on deck to hold and guide the chain during anchoring operations. The two products should not be mixed in drawings or quotations.

Q3: What information is needed before quotation?

A3: Please confirm standard edition, watertight or non-watertight version, chain diameter, chain grade, material, surface treatment, quantity, certificate requirement, watertight test requirement, installation drawing, delivery destination, and required delivery time.