According to the angle :45°elbow ,90°elbow ,180°elbow.
According to the material:Carbon steel elbow pipe ,cast steel elbow pipe,alloy steel elbow pipe ,stainless steel elbow pipe,aluminum alloy elbow pipe ,etc.
According to how to connect the pipe:Direct welding (the most common method ),flange link,hot melt link,fused link,thread link,socket link.
According to the process:Welding elbow pipe, punching elbow pipe, push elbow pipe, casting elbow pipe, butt weld elbow pipe, etc.
According to the material:Carbon steel pipe ,cast steel pipe,alloy steel pipe ,stainless steel pipe,aluminum alloy ,etc.
According to manufacturing standards:GB/T12459-2005,GB/T13401-2005,ASME B16.9,SH3408,SH3409-96,SH3410-96,HG/T21635,DL/T 695,SY/T 0510,DIN 2615.