Sepi dikelompokeun anu didamel tina karbon atanapi aliran celek banjir, plat, profil, pikeun bentukna tangtu anu tiasa ngadamel fungsi (10 fessidis. Mostly these fittings includes steel elbow (45 or 90 degree bend), tee, reducer (concentric or eccentric reducer), cross, caps, nipple, flanges, gasket, studs and etc.