... 45#,16Mn,27SiMn,12Cr1MoV,Q235, ST42,ST52,A106-a,A106-b, and so on Length 6-12m. As ... end or warnished as per buyer's requestments. 3. Marking: as per customer's requests. 4. Painting varnish ... tubes foroil casing andtubing in oil wellsAPE SPEC 5LA, B, X42APISeamles Steel Tubesand Pipes forHigh Pressure BoilerGB5310-199520G, ... .BASTM A53 Gr.BASTM A315 Gr.BASTM A210-A-1St 42St 4516MnASTM A210-CSt 52.4St 52 ...