90 degree,45 degree,180 degree,welding,threaded and socket elbows with good quality,reasonable price,promptly delivery. Product Description : ... .9 B16.28, JIS B2311,JISB23126)Applications range: petroleum,chemical,power,gas,metallurgy,shipbuilding,construction ,etc7)Quality: First-class8) Authentication: ISO90019 ... .576250822558.8342.9838.2558.824609.6381914.4609.6 specifications 90de socket elbow