Anchor chain/Anchors and Chains Survey /Underwater Repair and Maintenance/Underwater operations report

앙카(ANCHOR)체인

Anchor chain

Anchor chain wear test

주)대한마린산업

Co.) DAEHANMARINE INDUSTRY

Underwater Repair and Maintenance 051) 405-3737

Able to English Conversation: 016-692-5874

+82-16-692-5874

Anchor chain?

• 1. 닻
• a bower anchor 큰 닻, 이물 닻
• a foul anchor 닻줄이 휘감긴 닻
• a kedge anchor 작은 닻
• 2. 고정 장치[기구];
• 추
• 양 끝의 고정 장치
• 3. 닻 모양을 한 것

Surveyor Guide Notes for Anchors and Chains Survey

Guidance below is not linked to the extent of checking required for different periodical surveys.

Mooring equipment
Condition of the windlass foundations
Possible excessive wear on cable lifters, gears. Check clutches under operation
Condition of the prime movers:
Steam engines (dismantled if necessary),
Electrical motor (insulation resistance measurements),
Hydraulic motors,
Flexible couplings and torque limiters,
Condition of cable stoppers, when fitted,
Running test to verify good functioning

When there is a problem, it should be replaced.

Securing by welding of loose chain link studs

Proposal for repair is to be submitted to the Surveyor including a qualified welding procedure.

Acceptance of the proposal is based on the condition of the link lo be repaired and of remaining links.

Welding is to be performed by qualified welders.

Positioning
Check the Size
Check drawings

Check the work location
Photo shoot
Video shooting

 

Check the chain size

Thickness / weight

Corrosion Inspection

Check the wear

The exact location

Usual method of checking wear limits is to select by visual inspection 3 worst links and calibrate them at position of most wear (area of maximum wear)

Anchor of a fixed part and wear tests

앙카의 고정부위 및 마모도 검사!

Repair procedure

The abutting surfaces of the link and stud to be welded are to be ground to produce a good fit with an acceptable root gap to prevent cracking. The surfaces are to be free from moisture, grease, rust etc., just prior to welding.

NDE to check that the link is free from cracks is to be performed before welding at Surveyor satisfaction.

Welding consumables are to be dried adequately prior to welding in accordance with manufacturer’s recommendation.

In general the stud should be welded at the end opposite to the flash butt weld of the link and it should be welded completely around the circumference.

All weld stop-starts shall be grounded to remove any defects and to blend smoothly with the base material.

All welds are subjected to visual examination and NDE. For Q3 chain cables, inspection is recommended to be delayed for at least 48 hours after the weld has cooled to ambient temperature.

Studs should be located in the links centrally and at right angles to the sides of the link.

주)대한마린산업

Co.) DAEHANMARINE INDUSTRY

Underwater Repair and Maintenance

Ship Repair
Ship survey
Ship welding /Vessel welding
Ship cutting
Vessel Cleaning

Underwater construction

Underwater photography.Underwater Video

Underwater operations report

Underwater Repair and Maintenance

Providing a service that is both versatile and effective, DAEHANMARINE has built a reputation as the world’s leading underwater repair and replacement specialists. DAEHANMARINE can provide fast service at reasonable costs.

The services offered range from an inspection of an external condition and any required maintenance work all the way through to highly technical major repairs or replacements of a ship’s external underwater equipment and machinery. Repairs to thrusters, propellers, rudders, stern tube seals, damaged or corroded hulls and all other underwater services are carried out by professional teams qualified to perform complex technical tasks underwater while the vessel is on-site.

Maintenance work like the replacement of anodes that are worn out can easily be carried out without any interference with the vessel’s sailing schedule. DAEHANMARINE technical personnel work closely together with owners, managers and supervisors. All procedures and techniques used are fully approved by the major classification societies.

DAEHANMARINE is renowned for bringing highest quality repairs in drydock-like conditions to ships and offshore units. All operations can be carried out in port or while the vessel is stationary at sea. Normal commercial activities can therefore continue without disruption. This helps owners extend drydock intervals and eliminates the loss of time and production that drydocking entails.

If you need assistance with your vessel or if you need more information on the DAEHANMARINE services, please contact E-MAIL : marine119@marine119.kr

주)대한마린산업

Co.) DAEHANMARINE INDUSTRY

Underwater Repair and Maintenance 051) 405-3737

Able to English Conversation: 016-692-5874

+82-16-692-5874