ur products cover variety of style and specifications, they are all with good appearance and reliable capability, we adopt different material to make welding neck seamless elbow pipe. reducing pipe, seamless three way, four way, edge, pipe caps and flange, it can be made according to National Standard GB12459, America standard ASTM403、German Standard DIN2605(elbow pipe), DIN2609(edge), DIN2615(three way), DIN2616(reducing pipe), we can also accept special order as client''s request.