API 5L (American Petroleum Institute Specification 5L) thiab ASTM A53 (American Society for Testing and Materials Specification A53) yog cov qauv tseem ceeb tswj kev tsim thiab siv cov kav hlau. Lawv txawv heev nyob rau hauv lawv lub hom phiaj kev siv, cov khoom yuav tsum tau, thiab cov yam ntxwv ntawm kev ua tau zoo.
API 5L Txuj
Tus txheej txheem muaj nyob rau hauv ntau qib xws li A, B, X42, X46, X52, X56, X60, X65, X70, txhua tus muaj qhov tsawg kawg nkaus tawm lub zog thiab siab tshaj plaws tensile zog. Thiab muaj ob yam khoom tshwj xeeb (API 5L PSL1 thiab API 5L PSL2) uas muab cov qib sib txawv ntawm kev ua tau zoo thiab cov kev xeem.
Cov tshuaj muaj pes tsawg leeg muab cov kev cai nruj kom haum rau kev ua tau zoo thiab txhim khu kev qha. Cov ntsiab lus ntawm cov ntsiab lus xws li carbon, manganese, phosphorus, thiab sulfur yog tswj. Cov cuab yeej cuab tam qib sib txawv, nrog rau qhov tsawg kawg nkaus lub zog ntawm 210 MPa rau Qib A thiab 245 MPa rau Qib B.
API 5L seamless yeeb nkab yog tsim los ntawm extruding hlau mus rau hauv qhov yuav tsum tau ntev, thaum welded yeeb nkab yog tsim los ntawm dov hlau daim hlau thiab ces welding cov npoo. Tsom ntsoov rau kev thauj cov kua thiab roj hauv cov kav dej. Feem ntau tsim rau cov kav dej rau kev thauj cov roj av, roj thiab cov dej hauv kev lag luam roj thiab roj.
ASTM A53 Txuj
ASTM A53 yog tus qauv specification los ntawm ASTM International npog seamless thiab welded dub thiab kub-dip galvanized steel kav. Nws muaj nyob rau hauv Hom S (seamless), Hom E (ERW), Hluav taws xob tsis kam welded longitudinal seam) thiab Hom F (lub qhov cub welded). A53 cov kav dej raug txwv rau Hom A thiab Hom B raws li qib kawm, nrog Hom B yog ntau dua. Cov txheej txheem ntsuas tus qauv yuav tsum muaj, suav nrog kev sim hydrostatic thiab tsis muaj kev puas tsuaj hluav taws xob.
A53 yog hloov tau yooj yim dua nyob rau hauv cov ntsiab lus ntawm cov tshuaj muaj pes tsawg leeg, txawm hais tias nws yuav tsum tseem tsim nyog rau vuam los yog kev ua haujlwm. Cov kev xav tau rau lub zog tensile thiab lub zog tawm los yog teev nyob rau hauv cov khoom siv tshuab. Hom E thiab S qib yuav tsum muaj qhov tsawg kawg nkaus yield zog ntawm 207 MPa.
ASTM A53 yog tsim rau kev siv tshuab thiab siab, suav nrog cov kav dej thiab HVAC.
A53 Carbon Steel Seamless Yeeb Nkab
