... )Standard:ASME,ANSI,BS,etc. 4)material:cs,ss,alloy BG BW pipe fitting 180 Degree Bend sizeSeamless:from 1/2" to ... A403 WP304,304L,316,316L,321. 1Cr18Ni9Ti, 00Cr19Ni10,00Cr17Ni14Mo2, ect)Alloy steel(ASTM A234 WP12,WP11,WP22,WP5,WP9,WP91,16MnR ...