... color double heads with cap small dia pipe Seamless steel pipe/seamless pipe/steel tube(1)Surface treatment:coated black ... N MM MATCH TABLE AND PER WEIGHT TABLE Pipe OD sizethicknessPer weightinchmm.mminch.kg/m.lb/ ... , aviation,construction, machinery manufacturing, steel construction projects, shipbuilding, steel structure engineering, electrical engineering, power plant, agricultural, geology, airport ...