• Improper welding of X80 pipeline may cause cracks
• Brief introduction of API X52 pipeline steel
• The difference between PSL1 and PSL2
• Harm of inclusions in X70 pipeline steel
• API 5L pipeline pipe
• X52 steel plate surface quality standards that need to be met
• The basic production process of API 5L X60 pipeline steel
• The key to Q460D steel welding process
• What does the heat treatment of Q690 Steel include?
• Reasons for choosing Q690D steel

Steel Products for Shipbuilding

Abstract:
Product designs and properties of 6 steel products for shipbuilding are described. They are new TMCP(thermo-mechanical control process) steel plates, weldable with high heat input, for container ships and LP(longitudinal profile) plates, both contribute to the increase in productivity at shipyards through the large reduction of welding time, anti-corrosion steel plates for crude oil tankers NAC5 which contribute to high performance of ships from the viewpoint of corrosion, cladded steel plates for chemical tankers, anti-corrosion pipes,
JFE-MARINE-COP, used in crude oil tankers for loading and unloading crude oil, and shapes for shipbuilding which are produced using TMCP to realize weldability as good as steel plates.

Introduction
In recent years, the shipbuilding industry has energetically promoted high performance of ships and improved productivity in construction in response to vessel diversification(trend toward exclusive-use ships). In the process,the industry has also pointed out a variety of developmental needs related to steel products, resulting in the creation of new technologies and new products.This report describes the product design concepts and properties of the following 6 products which were developed by JFE Steel in response to these needs. In the field of plate, they include new TMCP (thermo-mechanicalcontrol process) steel plates for high heat input welding for container ships, which contribute to improved productivity by greatly reducing welding working time, and LP steel plates (longitudinally profiled plates, also called taper plates), new anti-corrosion steel plates for crude oil tankers, NAC5, which contribute to higher performance in ships through improved corrosion resistance,and clad steel plates for chemical tankers. Tubular products include JFE-MARINE-COP for crude oil tankers,which improves corrosion wear performance in onboard oil receiving pipes used in loading and unloading crude oil. Among shape steels, JFE Steel has developed TMCP technologies for shapes for shipbuilding which provide weldability equal to that of plates.

Shanghai katalor industry co.,ltd is specialized in exporting shipbuilding steel plates/steel sheets in ABS, GL, DNV, LR……standards with steel grade AB/AH36, AB/DH36, AB/EH36, AB/FH36, AB/AH32, AB/DH32, AB/EH32, AB/FH32, ABS GRADE A, ABS GRADE B, ABS GRADE D, ABS GRADE E. AB/AH40, AB/DH40, AB/EH40, AB/FH40 and AB/EH32, ABS EH32, EH32 and etc.

In additional,we have our own pre-treatment plant in shanghai.So , we can offer this service (blasting, plainting….)at the lowest cost .