We are offering socket weld.Stainless steel: astm a182 f304 304l 304h 316 316l 317 317l 321 310 347 904l etc.Carbon steel: astm a105 a105n a694 f42465256606570 a350 lf3 a350 lf2, etc. Alloy steel: astm a182 f1 f5 f9 f11 f22 f91 etc.Types : elbow, tee, union, cross, coupling, cap, bushing , plug, swage nipple, welding boss, hexagon nipple, barrel nipple, welding nipple, parraler nipple, street elbow, hexagon nut, hose nipple, bend, adapter, insert, cross, weldolet, sockolet, thredolet, etc.