Butt welded elbow is a commonly used pipe fitting,it can divided as two types:90 deg and 45 deg.These elbows have similar functions,the only difference is the 90 degree elbow can changes the direction in 90 deg while the 45 degree elbow can changes in 45deg.These are Shanghai Zhucheng Pipe Fittings Manufacturing Co Ltd’s steel pipe fittings packages to ensure that the products are not damaged during transportation.