... #,45#,16Mn,27SiMn,12Cr1MoV,Q235, ST42,ST52,A106-a,A106-b, and so on Length 6-12m. As customers requestments. Model ... 4. Petroleunm and natural gas industry 5. Chemistry industry 6. Electric industry Package 1. Bundle packing. 2. Bevelled end or plain ... steel tubes foroil casing andtubing in oil wellsAPE SPEC 5LA, B, X42APISeamles Steel Tubesand Pipes forHigh Pressure BoilerGB5310-199520G, 20MnG, 25MnG ...