... 2.1/2'' to 60'' 3.high quality 4.T/T,L/C carbon steel flange 5.API,CE,ISO ... certification: ISO9001:2000, API, BV, SGS, LOIYD7. Applications range: "Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, water and nuclear ... certification:ISO9001:2000 , API , BV , SGS, LOIYDApplications range: Petroleum, chemical, power, gas, metallurgy, shipbuilding.construction,water and nuclear power ...