ASTM A234 ndiyo standard simple yePIPE Fittings ye Aball Carbon Simbi uye Alloy Steel yerwe zvine mwero uye yakakwirira-tembiricha. Carbon Steel pombi Fittings yakagadzirwa neASMT A233 inowanzo kuvezwa muButt-Welding fomu zvinoenderana neAsme B16.9 kana ASME B16.49. Kune maviri carbon simbi mamakisi: WPB uye WPC, iyo iyo ASTM A233 WPB inonyanya kushandiswa muPIPELELINE indasitiri. The A234 WPB butt-welding pipe fittings include elbows, bends, returns, tees, reducers, end caps, crosses, lap joint stub ends, nipples and couplings.
Mushure mekuumba tembiricha yakakwirira, yakakodzera tembiricha iri pasi pehuremu hwakakosha pasi pemamiriro ezvinhu akakodzera kuti udzivise kuremara kwekutonhora, asi pasina mhosva nekukurumidza kupfuura iyo inotonhorera mudenga. Kupisa kurapa kwekupisa kwakataurwa simbi (chikamu) kupisa. Kupisa-kwakarapwa Fittings kunofanirwa kurapwa zvinoenderana nendima 7 mukufunga A960 \ / a960m.