Q1: Dab tsi yog txoj kev vuam zoo rau ASTM A53 Qib B kav?
A1: Feem ntau welded siv Shielded Hlau Arc Vuam (SMAW) los yog Gas Metal Arc Vuam (GMAW) nrog E70 series electrodes/filler xov hlau, tom qab preheating (yog tias thickness> ¾ nti) thiab interpass kub tswj.
Q2: Dab tsi yog qhov siab tshaj carbon sib npaug (CE) rau ASTM A53?
A2: CE tsis tau teev nyob rau hauv ASTM A53, tab sis rau weldability, CE feem ntau yuav tsum khaws cia qis dua 0.40% rau Qib B.
Q3: Yuav ua li cas tiv thaiv weld tawg hauv A53 kav dej thaum lub caij ntuj no vuam?
A3: Preheat kom tsawg kawg yog 50 degree, siv qis -hydrogen electrodes, thiab tswj qhov kub thiab txias; tsis txhob welding nyob rau hauv cua / ntub dej.
Q4: Cov txheej txheem vuam dab tsi tsim nyog rau API 5L X65 kav?
A4: Siv cov txheej txheem tsim nyog raws li API 1104 lossis ASME Tshooj IX. Feem ntau GMAW los yog Submerged Arc Welding (SAW) nrog qhov sib txuam toughness - ntsuas cov hlau muab tub lim (xws li E81T1-Ni2 rau X65).
Q5: Yuav ua li cas kom HAZ toughness hauv API 5L X70 welded pob qij txha?
A5: Tswj cov khoom siv hluav taws xob cua sov (0.8–2.0 kJ / mm), siv micro-alloyed muab tub lim nrog Ti/B ntxiv, thiab tejzaum nws tom qab-weld heat treatment (PWHT).
