1)Suitable for conveyance of gas, petroleum, fluid, and electricity 2)Seamless,SAW and ERW ... : black, blank, bright and galvanized, or painted C: Length of each pipe: 500mm-16,000mm D: Steel grade: 10#, 20#, A106B, A53B ... China to Oceania, Japan, Korea, Southeast Asian Nations and part of American and European countries have started to select our products ...