... middle pressure fluid pipeline,boiler, petroleum and natural gas industry,drilling,chemical industry,electric industry,shipbuilding,fertilizer ... customers' requestCertificateISO9001:2008, SGS,BV, etcCapacity50000tons/yearAdvantages1.Reasonable price with excellent quality2.Abundant stock and prompt delivery3.Rich ... Testing5. Marking6. Packing & Transportation7. Company steel pipe elbow 12 inch