... ,20k,30k,150# to 2500#,PN6-PN40 professional manufacuture of flangesize:DN15-DN2000material:cs&sspressure:5k,10k,16k,20k,30k ... have a team of skilled worker and international expert sales. We can offer the most competitive price,highest quality and best service ... in every step.Welcome to our factory and have a business disussion. professional manufacture of flange