... :JIS G3458-2005, GB 5310-1995, GB 3087-1999, ASTM A213-2001, ASTM A335-2006Grade:Cr-Mo alloy, A53-A369Grade:12Cr1MoV, 12Cr1MoVG, 15CrMoG ... , P11,P91 2.Standard: ASTMA213,A333,A335,JIS G3458Alloy Pipe ASTM A335 P91:1) Standard:ASTM A213, A333, A335, ASME SA213, SA333, SA335;JIS G3458 ...