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 Reporter June 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Shipbuilding

VIDEO: HMS Queen Elizabeth Floats Out

A timelapse video of HMS Queen Elizabeth floating out of her dock for the first time is now available at http://www.youtube.com/watch?v=P0ZjQz9vEKw. The float out of the 65,

GE, LR Study Gas Turbines for Commercial Ships

GE Marine and Lloyd’s Register Sign Memorandum of Understanding to Collaborate on Applying Gas Turbines to Power Commercial Ships GE Marine and Lloyd’s Register

Hyundai Heavy Industries Develops HiCASS

Hyundai Heavy Industries Co., Ltd. (HHI) announced today that it developed Hyundai Intelligent Collision Avoidance Support System (HiCASS) for the first time in

Ship Repair & Conversion

Hyde Marine Makes BWTS Installation Agreements

Hyde Marine, Inc., a wholly owned subsidiary of Calgon Carbon Corporation, says it has established two partnership agreements for installation of the chemical-free

MAN Extends High Speed Power Range

MAN announced it will present a newly developed 12-cylinder V-engine for use in working vessels at the SMM 2014 trade fair in Hamburg, Germany. The German engine

Germany as a Maritime Location Endangered: VDR

Germany, which currently is home to the world’s biggest container vessel fleet, will in future have fewer small shipping firms as European banks avoid the industry

Tanker Trends

Scorpio Tankers: Latest Financial & Ship Delivery News

Scorpio Tankers Inc. says it has updated its stock buyback program; lists its latest new vessel deliveries, and gives the release date of its second quarter 2014 earnings report.

Suicide Attack Escalates Libya Violence, Oil Output Slips

Crude output slips for first time since port deal; fresh clashes in Tripoli and Benghazi. Brega oil port seen open in few days. A twin suicide bombing at a Libyan

Oil Products Flow to Primorsk Resumed

Russia resumed oil products shipments to Primorsk after a halt following "criminal tapping" of pipeline, a subsidiary of Russian oil pipeline monopoly Transneft said.

News

VIDEO: HMS Queen Elizabeth Floats Out

A timelapse video of HMS Queen Elizabeth floating out of her dock for the first time is now available at http://www.youtube.com/watch?v=P0ZjQz9vEKw. The float out of the 65,

GE, LR Study Gas Turbines for Commercial Ships

GE Marine and Lloyd’s Register Sign Memorandum of Understanding to Collaborate on Applying Gas Turbines to Power Commercial Ships GE Marine and Lloyd’s Register

Hyundai Heavy Industries Develops HiCASS

Hyundai Heavy Industries Co., Ltd. (HHI) announced today that it developed Hyundai Intelligent Collision Avoidance Support System (HiCASS) for the first time in

Marine Equipment

GE, LR Study Gas Turbines for Commercial Ships

GE Marine and Lloyd’s Register Sign Memorandum of Understanding to Collaborate on Applying Gas Turbines to Power Commercial Ships GE Marine and Lloyd’s Register

General Dynamics Launches Morgan County NextGen-911

General Dynamics Information Technology, a business unit of General Dynamics, has implemented a NextGen-911 emergency service solution for Morgan County, Ohio.

Training Builds Support for Sennebogen Customers

When Sennebogen LLC opened its new headquarters in Stanley, N.C., in 2009, the facility was equipped with one of America’s premier OEM Training Centers for heavy equipment.

Maritime Safety

Hyundai Heavy Industries Develops HiCASS

Hyundai Heavy Industries Co., Ltd. (HHI) announced today that it developed Hyundai Intelligent Collision Avoidance Support System (HiCASS) for the first time in

USCG to Assist Jamaica with MRO

Jamaica’s readiness for Mass Rescue Operations (MRO) in its maritime space will be boosted July 22-24, 2014 with the assistance of a subject matter expert from the U.

Costa Concordia: Operations to Tow the Wreck Begin

Maneouvres began early on Wednesday to remove the rusty hulk of the Costa Concordia cruise liner from the Italian island where it struck rocks and capsized two years ago, killing 32 people.

Classification Societies

GE, LR Study Gas Turbines for Commercial Ships

GE Marine and Lloyd’s Register Sign Memorandum of Understanding to Collaborate on Applying Gas Turbines to Power Commercial Ships GE Marine and Lloyd’s Register

DNV GL Publishes Regulatory Roadmap for Floaters in the US

DNV GL announced it has mapped out what is necessary to be in compliance with U.S. Coast Guard (USCG) requirements to operate FOIs, FSOs and FPSOs in U.S. waters.

Singapore Approves Danelec New-Generation VDR

The Maritime and Port Authority of Singapore has issued a certificate of approval for the Danelec DM100 VDR for installation on ships under the Singapore registry.

 
 
Maritime Contracts Maritime Standards Naval Architecture Navigation Offshore Oil Salvage Ship Electronics Ship Repair Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | 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: 0.1062 sec (9 req/sec)