ClassNK Issues New Welding Guidelines

MarineLink.com
Tuesday, January 14, 2014

Classification society ClassNK (Chairman and President: Noboru Ueda) announced that it has released new Guidelines on the Welding of Duplex Stainless Steels. The guidelines have been developed to help shipyards safely and effectively make use of new duplex steels that are increasingly being used in the construction of cargo tanks for chemical carriers. As part of its work to support the safe construction of ships, ClassNK has released the guidelines for free via its website.


Duplex stainless steel has a two-phase microstructure containing grains of both ferritic and austenitic phase, giving it a combination of excellent corrosion resistance and high strength with a lower nickel content than austenitic stainless steels such as SUS304 and SUS316L.


The vast majority of the world’s chemical tankers with stainless steel cargo tanks are built at Japanese shipyards, which have traditionally used austenitic steels for cargo tank construction. Recently however these shipyards are increasingly using duplex stainless steels as an alternative to austenitic stainless steels for their corrosion resistance and high strength properties.


Before shipyards or builders can use duplex stainless steel in the construction of vessels, however, they must first obtain approval for the Welding Procedure Specification (WPS) that will be used when welding duplex stainless steel. It was in order to simplify this process and support the widespread use of these new materials at shipyards around the world that ClassNK released its new Guidelines on the Welding of Duplex Stainless Steels on 14 January 2014.


The new guidelines, which conform to ClassNK rules, provide a comprehensive summary of the requirements for welding procedure specification certification and welding procedure qualification tests, including relevant precautionary measures for the welding of duplex stainless steels.

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter July 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Shipbuilding

India Govt, Cochin Shipyard Pact on FY17 Growth Targets

Cochin Shipyard Limited (CSL) has entered into a Memorandum of Understanding (MoU)  with the government of India for the ongoing fiscal under which targets agreed

Keel Laying for Russia's Second Nuclear Icebreaker

Today the Baltic Shipyard in St Petersburg (part of United Shipbuilding Corporation) laid the keel of Ural, Project 22220’s second series-produced nuclear icebreaker.

Russia: 6th Yasen-Class Nuclear Sub

Russia's sixth Yasen-class nuclear submarine will be laid down at the Sevmash ship-building company in the city of Severodvinsk on July 29, reports RIA Novosti.

Ship Repair & Conversion

India Govt, Cochin Shipyard Pact on FY17 Growth Targets

Cochin Shipyard Limited (CSL) has entered into a Memorandum of Understanding (MoU)  with the government of India for the ongoing fiscal under which targets agreed

CNCo Orders Remote Monitoring for 35 Vessels

Radio Holland, a global NavCom and service company in the maritime industry, said it has concluded  a maintenance and remote monitoring agreement with The China

BMT to Lead Repower for Historic USCG Eagle

BMT Designers & Planners, a subsidiary of BMT Group, an international maritime design, engineering and risk management consultancy, is leading the effort to repower the historic U.

Tanker Trends

NASSCO Delivers Garden State to APT

Marking its seventh ship delivery in the span of just over a year, General Dynamics NASSCO has delivered the newly built ECO Class tanker Garden State for American Petroleum Tankers.

Bahri Q2 Net Profit Soars

National Shipping Company of Saudi Arabia (Bahri), the exclusive oil-shipper for Saudi Aramco, reported a 47.2 percent increase in second-quarter net profit on Tuesday.

First LNG Vessel Transits Expanded Panama Canal

Today, the Panama Canal marked another milestone with the transit of the first-ever liquefied natural gas (LNG) carrier through its expanded locks.   Shell-chartered

News

Scorpio Bulkers books Net Loss

USA-Monaco based bulk carrier Scorpio Bulkers has reported a loss of $24.7 million in its second quarter of 2016, pushing the carrier's deficit up to $ 83 million.

Cambodia Urged ASEAN to Avoid Words That Escalate Tension

Cambodia advised a grouping of South East Asian nations to avoid using words that "would escalate tension between China and the Philippines" in a weekend statement,

Technip Bags Woodside's Subsea Contract

Technip has been awarded a large(1) subsea contract by Woodside to support the development of the Greater Enfield Project offshore Western Australia, at a water

Marine Equipment

CNCo Orders Remote Monitoring for 35 Vessels

Radio Holland, a global NavCom and service company in the maritime industry, said it has concluded  a maintenance and remote monitoring agreement with The China

Technip Bags Woodside's Subsea Contract

Technip has been awarded a large(1) subsea contract by Woodside to support the development of the Greater Enfield Project offshore Western Australia, at a water

Ecofix Filler Coat Cuts Rudder Repairs Cost

With an increasing trend for thruster and rudder manufacturers finishing their products with self-cleaning protective hard coatings, Antwerp headquartered Subsea

Maritime Safety

Drones: Is the Maritime Industry Ready?

Unmanned aerial systems (UAS), or “drones” in common parlance, are not a part of the historical maritime vocabulary. At least not yet. While the term “drones” may conjure images from science fiction,

Cambodia Urged ASEAN to Avoid Words That Escalate Tension

Cambodia advised a grouping of South East Asian nations to avoid using words that "would escalate tension between China and the Philippines" in a weekend statement,

KVH's Zika Virus Safety Video for Mariners

KVH Industries, Inc., (Nasdaq: KVHI), announced today that it is offering Videotel’s new safety and training video about the Zika virus free to all mariners worldwide.

Classification Societies

Drones: Is the Maritime Industry Ready?

Unmanned aerial systems (UAS), or “drones” in common parlance, are not a part of the historical maritime vocabulary. At least not yet. While the term “drones” may conjure images from science fiction,

AkzoNobel Acheives ISO 19030 Compliance

AkzoNobel’s Marine Coatings business has outlined for the first time its full compliance with ISO 19030, the new standard for measuring hull and propeller performance.

Romica Manufacturer Secures DNV GL Approval

U.K. winch maker Romica said it is to “redouble its exports drive” after its Romania-based manufacturing partner successfully acquired accreditation with DNV GL.

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Offshore Oil Pipelines Salvage Ship Simulators Shipbuilding / Vessel Construction Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1028 sec (10 req/sec)