Ntawm cov yeeb nkab fittings
1. raws rau hauv ntau lawm li qeb
(1) – kub kuav los tiag raj seamless yeeb, zeb rolling txias, txias twv leeg, extruded raj, sab saum toj raj
(2) yeeb nkab (a) raws mus txheej txheem--arc vuam, kuj vuam yeeb (loj, tsawg zaus), cov pa yeeb nkab, qhov cub xob yeeb nkab (b) raws rau lub weld--leeg ncaj nraim yeeb welded thiab kauv welded yeeb nkab
2. cov kev faib tawm cross-section puab
(1) nqe lus yeeb--hloov yeeb, thiab yeeb nkab square, thiab yeeb dawb, thiab daim duab peb sab yeeb, thiab rau lub kaum ntse ntse zoo li tus yeeb, thiab pob zeb diamond yeeb, thiab yeeb octagonal, thiab semicircle hlau hloov, thiab lwm nqe (2) txoj yeeb nkab — xws li sab rau lub kaum ntse ntse zoo li tus yeeb, thiab tsib nrov plig plawg plum zoo li tus yeeb, thiab coj convex zoo li tus yeeb, thiab coj concave zoo li tus yeeb nkab, thiab noob zoo li tus xa, thiab kab yeeb tapered , thiab corrugated zoo li tus yeeb, thiab lus plhaub yeeb, thiab lwm yam
3. raws rau txoj kev faib tawm – nyias-walled hlau raj phab ntsa thickness ⒑
4. txwv kom muab zais los ntawm kev siv – kav kav steel, steel leeg twj thermal, machinery thiab muaj steel kaw, roj, geological drilling yeeb nkab, xa, kev xa, ib tshwj xeeb-lub hom phiaj, lwm yam.
