LNG Tank Welding Procedure And Its Properties

Introduction of large LNG(liquefied natural gas) storage tank development,in the Comparative Study of the low temperature of the LNG tank structural material 9Ni steel and aluminum alloy 5083,by bound welding crack testing,welding technology assessment test,neutral salt spray corrosion test,low temperature Charpy impact test and crack opening displacement (CTOD),such as testing a series of tests on two of the welding of metal materials,corrosion resistant to salt spray and low-temperature toughness,resolve 9Ni encountered in the process of welding the cracks of hot and cold and the toughness Decline,magnetic blow,as well as the 5083 aluminum welding cracks,and other problems through the electrode arc welding (SMAW) and SAW two different methods of welding process parameters 9Ni welded steel butt joint comparative test,according to EN10002-1-1990,EN-910-1996 standards for tensile and bending tests to determine the method of welding 9Ni.According to the standard ASTM-B-117-97 provides for 9Ni steel and aluminum alloy 5083 do neutral salt spray corrosion testing,salt spray corrosion resistance on their ability,according to standard GB/T 13817-92 provisions of the 9Ni steel welding cracks binding Pilot study of its welding performance,according to EN10045-1-1991 standards at the request of Weld Centre,fusion,from the fusion zone 2mm,from the fusion zone 5mm,a gap for the summer than the impact test,according to the British Standard BS7448 fracture toughness test The different processes of the weld and heat-affected areas be measured by the value and impact of Charpy and the value of CTOD evaluation 9Ni steel and aluminum alloy 5083 the low temperature performance.