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

Shipbuilding

James Troop Supplies Engines for 3 Naval Vessels

Liverpool City Region (UK) based ship engine specialist James Troop & Co has won an order to supply Volvo Penta diesel engines for three European naval vessels being built on Merseyside.

OSV Delivered to MC2 in Dubai

Marine Core & Charter LLC (MC2) headquartered in Dubai has taken delivery of the new build PETRA-1, the first of two, 45-meter Fast Offshore Support Vessels in

Six New VLCCs Marks the Start of a Busy Delivery Year

2016 is off to a flying start when it comes to delivering brand new VLCCs from shipyards in South Korea and China to owners and investor across the globe, says a report BIMCO.

Tanker Trends

Owner Fined for 'Dangerously Unsafe' Vessel

The owner of a harbor tanker has been fined £3,000 with more than £7,000 costs after pleading guilty to a charge of operating a vessel for being dangerously unsafe.

Shipping Corporation Q3 Profit Surges

The Shipping Corporation of India (SCI) declared its unaudited financial results for the quarter ended 31st December 2015 posting a net profit of Rs. 59.66 crores as against a net profit of Rs.

Sea IT, Veritas Tankers Ink Long-term Software Deal

Sea IT has entered a long term ICT agreement with Veritas Tankers. The agreement comprises installation of BlueCORE Generation 4, an ICT platform specifically developed for the marine industry,

News

SunEdison Restrained from 'Unusual' Asset Transfers

Solar company SunEdison Inc said a U.S. court has restrained the company from making any unusual asset transfers until a hearing in a lawsuit brought on by investors

Maersk to Scrap Ships at India's Alang Beaches, NGO Dismayed

Maersk Line said on Friday it had chosen four shipbreaking yards along India's Alang beaches to handle an increase in vessels that need to be scrapped, to the dismay

Video: Catapult Testing on Aircraft Carrier Abraham Lincoln

U.S. shipbuilder Huntington Ingalls Industries’ (HII) Newport News Shipbuilding division has begun testing the updated catapult systems aboard the U.S. Navy aircraft

Marine Equipment

Teknotherm Marine Moves HVAC Arm to Bergen

Maritime heating, ventilation and air conditioning (HVAC) firm Teknotherm Marine has established a new subsidiary is established with the name Teknotherm Marine HVAC AS.

Sentinel Launches New Rudder Feedback Unit

Sentinel, a Beier Radio company, has designed and manufactured a new Rudder Feedback Unit (RFU) with many new features, including watertight components and connections

USS Coronado Completes Survivability Test

The U.S. Navy’s littoral combat ship (LCS) USS Coronado (LCS 4) has completed survivability testing off the coast of California on January 28 in preparation for

Maritime Safety

Maersk to Scrap Ships at India's Alang Beaches, NGO Dismayed

Maersk Line said on Friday it had chosen four shipbreaking yards along India's Alang beaches to handle an increase in vessels that need to be scrapped, to the dismay

Video: Catapult Testing on Aircraft Carrier Abraham Lincoln

U.S. shipbuilder Huntington Ingalls Industries’ (HII) Newport News Shipbuilding division has begun testing the updated catapult systems aboard the U.S. Navy aircraft

Owner Fined for 'Dangerously Unsafe' Vessel

The owner of a harbor tanker has been fined £3,000 with more than £7,000 costs after pleading guilty to a charge of operating a vessel for being dangerously unsafe.

Classification Societies

Liberia to Receive Preferential Flag Status with Respect to Chinese Tonnage Dues

Pursuant to the Maritime Transport Agreement signed between the Republic of Liberia and the People’s Republic of China on 3 November 2015, Liberia will be added

The Next Generation of Hull Performance Management

Hull performance monitoring solutions can offer significant fuel savings potential, a fact that is prompting growing interest from the maritime industry. To spur

Meyer Turku Lays Keel of Tallink’s LNG Ferry

The keel of the Tallink’s new LNG-powered fast ferry Megastar was laid at the Meyer Turku shipyard   The hull assembly of Tallink’s new fast ferry Megastar started

 
 
Maritime Security Maritime Standards Naval Architecture Navigation Pipelines Port Authority Ship Electronics Ship Repair Shipbuilding / Vessel Construction 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: 0.0944 sec (11 req/sec)