Hei Yan Group is located in the mother town of carbon steel pipe fittings,pipes-Mengcun,Cangzhou,Hebei,ChinaBR Hei Yan IntL manufacture forming machines,press machine to finished steel pipes, pipe fittings.BR Hei Yan intL owns 5 branch factories which produce hot forming pushing machine,expanding machine,seamless steel pipe,weldedBR steel pipe ,carbon steel pipe fittings and casting products