steel pipe fittings Size:1/2"-48" Material:A234-WPB,A420-WPL6,A234-WP12,A234-WP11,A234-WP5 1) Sizes: 1/2 to 24 inches 2) Standards: ASTMA333GR1 GR3,GR6 3) TEMP:ASTMA333GR6 for -50 degree. ASTMA333GR3 for -70 to -100dgree. 4) test: SHARPY ,low temperature blow test. 5) Steel Grade: ASTMA333GR 1,GR3,GR6 steel reducer