... Sangao Metal Structure Co.,Ltd is a professional cone shaped pipe manufacturer and factory,Website:http://www.china-weldedpipe.com ... 8 , 5.85 , 5.9 , 6.0 ,11.8 , 12.0m. Random length: 5-12mStandardASTM A53, A106, API 5L, ... customers' requestCertificateISO9001, SGS,BV, etcCapacity80000tons/yearAdvantages1.Reasonable price with excellent quality2.Abundant stock and prompt delivery3.Rich supply and ...