... include:welding-neckflanges,slip-on flanges,blind flanges,thresded flanges and plate flanges etc,with specification from1/2"(DN15) to ... HB,JB etc. We can also manufacture special application flanges and forging parts that customers require. The annual output is ... . We have full authority for export ,advanced technology,craft and equipment.Product principal export to foreign countries,which are mainly ...