Q: Lub npe ib hom stainless hlau qib rau welded kav.
A:ASTM A312 TP304/304L los yog TP316/316L, siv rau corrosion kuj.
Q: Qhov "X" txhais li cas hauv API 5L X70?
A:Nws xaiv qhov siab - lub zog kab yeeb nkab qib nrog qhov ntsuas qhov tsawg kawg nkaus lub zog (SMYS) ntawm 70,000 psi.
Q: ASTM A787 yog dab tsi?
A:Nws npog hluav taws xob-kuj-welded metallic-coated steel mechanical tubing.
Q: Dab tsi yog qib raug rau boiler thiab cua kub exchanger raj?
A:ASTM A178 (ERW) lossis ASTM A214 rau carbon steel.
Q: Lub hom phiaj tseem ceeb ntawm kev kuaj tsis yog -kev puas tsuaj (NDT) ntawm qhov vuam seam yog dab tsi?
A:Txhawm rau txheeb xyuas qhov tsis xws luag sab hauv lossis saum npoo (xws li cov kab nrib pleb, tsis muaj fusion, porosity) yam tsis muaj kev puas tsuaj rau cov yeeb nkab.
