... ASTM B337,ASTM B338,ASTM B861 Specifications:Like in table 1,table 2,table 3Table 1 Cold rolled seamless alloy/unalloy titanium tubesGradestatusOuterDiameter ... ,>60~802.0,2.5,3.0,3.5,4.0,4.5 Table 2 Welded tubesGradestatusOuterDiameter/mmWall thickness/mmGr1Gr2Gr3Gr4Gr7Gr11Gr12Annealed(M)160.5 ... .8,1.0,1.25,1.5,2.02)Length:Table 4 Length of the seamless and welded-rolled tubesItemSeamless tubes/mmWelded ...