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

Shipbuilding

Seaspan Takes Delivery of 5th 10000 TEU Containership

Seaspan Corporation announced yesterday that it accepted delivery of a 10000 TEU containership, the MOL Brightness. The new containership, which was constructed

MHI to Change Name of Group Company

Effective November 1 Mitsubishi Heavy Industries, Ltd. (MHI) will change the name of its group company in Singapore from Mitsubishi Heavy Industries Engineering & Services Private Ltd.

Petrobras P-66 Platform Module to Boost Production

The P-66 platform’s first modules, built at the Tomé Ferrostaal Consortium’s Module Plant located at the Port of Maceió, Alagoas, are now ready and loaded on the São Tomé barge.

News

Seaspan Takes Delivery of 5th 10000 TEU Containership

Seaspan Corporation announced yesterday that it accepted delivery of a 10000 TEU containership, the MOL Brightness. The new containership, which was constructed

MHI to Change Name of Group Company

Effective November 1 Mitsubishi Heavy Industries, Ltd. (MHI) will change the name of its group company in Singapore from Mitsubishi Heavy Industries Engineering & Services Private Ltd.

Petrobras P-66 Platform Module to Boost Production

The P-66 platform’s first modules, built at the Tomé Ferrostaal Consortium’s Module Plant located at the Port of Maceió, Alagoas, are now ready and loaded on the São Tomé barge.

Marine Equipment

Seaspan Takes Delivery of 5th 10000 TEU Containership

Seaspan Corporation announced yesterday that it accepted delivery of a 10000 TEU containership, the MOL Brightness. The new containership, which was constructed

Petrobras P-66 Platform Module to Boost Production

The P-66 platform’s first modules, built at the Tomé Ferrostaal Consortium’s Module Plant located at the Port of Maceió, Alagoas, are now ready and loaded on the São Tomé barge.

Industrial Pressure Washers Kill Viruses

Water Cannon pressure washers utilized to fight influenza - clean and sanitize large areas Water Cannon Pressure Washers deliver a wide swath of low pressure 180 degree F.

Maritime Safety

Industrial Pressure Washers Kill Viruses

Water Cannon pressure washers utilized to fight influenza - clean and sanitize large areas Water Cannon Pressure Washers deliver a wide swath of low pressure 180 degree F.

Partnerships Key to Caribbean Maritime Security

Planning and execution of port and maritime safety and security in Caribbean region is all about partnerships Maritime security and safety experts are meeting in Nassau,

Braemar Hosts Insurance Experts

Braemar (incorporating The Salvage Association) welcomed an invited group of marine insurance professionals onto its specialist port and shipyard familiarization

Classification Societies

Korean Register to Drive LNG Fuelled Shipping

Korean Register (KR) will work alongside the Asia-Pacific Economic Cooperation Secretariat (APEC) to promote the use of LNG fuelled ships in the APEC region. APEC

ClassNK Certifies Ship with Air Lubrication System

ClassNK has completed the EEDI appraisal of Harvest Frost, the world’s first post-panamax bulk carrier fitted with the Mitsubishi Air Lubrication System (MALS).

CSC Launches Gas Storage Integrity Management Team

UK-based Chesterfield Special Cylinders (CSC) has launched a new integrity management team to work with owners and operators of high pressure gas storage vessels as installed in rigs and ships,

 
 
Maritime Standards Naval Architecture Pipelines Pod Propulsion Salvage Ship Electronics Ship Repair Shipbuilding / Vessel Construction 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: 0.1803 sec (6 req/sec)