material: stainless steel,carbon steel ,alloy steel flange and dual phase steel Standard: JIS,ANSI,UNI,DIN,NF ... dimeter 5000mm or smaller2).weingt: 6T or less3).material:various types of crabon steel,alloy steel,bearing steel,stainless steel,etc ... power generation,ship,pressure vessels,petrochemical,machinery manufacturing,aviation and aerospace.55).provide heat treatment,rough maahing,finish maching. ...