cap size:1/2'' to 64'' material:WPB,20grade steel,Q235B,WP11,WP22,WP91,304,304L 1)StandardASME,AISI,JIS,DIN,GB,BS2)TechnicsForged3) Size1/2"--48"(DN15--DN1200)4)Wall thicknessSCH5S--XXS5)MaterialA234 WPB,WP11,WP22,WP91,304,304L,316,316L,etc.6)useas a pipe joint widely used in oil, chemical industry, electric power, Shipping Industry and other pipe projects Cap