Large diameter elbow is curved connecting pieces that join straight lengths of pipe, commonly at a 90° or 45° angle, allowing obstructions to be avoided in plumbing, ventilation, welding, and automotive applications. ASME B16.9 Standard covers overall dimensions, tolerances,ratings, testing, and markings for factory-made wrought buttwelding fittings in sizes NPS 1⁄2 through NPS 48 (DN 15 through DN 1200). Size range: 20 "-62" Inch Wall thickness: Sch5-Sch160 XXS Material: Carbon steel: ASTM A234 WPB, WPC, ASTM A420 WPL1, WPL3, WPL6, WPHY42, 46, 52, 56, 60, 65, 70 Alloy steel: ASTM A234 WP1, WP12, WP11, WP22, WP5, WP7, WP8, WP91 API5L X42 X52 X56 X60 X65 X70 X80 Stainless steel: ASME A403 WP304, 304L, 316, 316L, 310 Standards: ANSI, DIN, JIS, GB, ASTM, JB, SH, YB, SY, HG, API ASME Usage: Petroleum, chemical, power, gas, metallurgy. Our pipe elbows are widely used in many industries, such as power generation, petroleum, natural ga