1. Q: Puas yog JIS G3444 STK400 yeeb nkab tuaj yeem galvanized?
A:Yog lawm, JIS G3444 STK400 yeeb nkab feem ntau yog kub-dip galvanized rau kev tiv thaiv corrosion, ua rau nws haum rau laj kab, tes tuav, thiab sab nraum zoov siv.
2. Q: Charpy cuam tshuam qhov ntsuas kub rau EN 10219 S275JOH yeeb nkab yog dab tsi?
A:EN 10219 qhia txog Charpy cuam tshuam kev kuaj rau S275JOH ntawm 0℃lossis -20 degree, nrog rau qhov tsawg kawg nkaus lub zog muaj nuj nqis (piv txwv li, 27 J ntawm -20℃rau qib JR) raws li kev hloov pauv thiab daim ntawv thov.
3. Q: Yuav ua li cas yog qhov ncaj siab kam rau ua rau ASTM A500 Qib B structural tubing?
A:Kev ua siab ntev ntev hauv ASTM A500 Qib B tau txhais tias yog qhov sib txawv siab tshaj plaws ntawm 1/8 nti ib 10 ko taw (3 hli ib 3 m) rau puag ncig tubing, kom ntseeg tau tias tsim nyog rau cov qauv framing.
4. Q: Dab tsi vuam electrodes raug pom zoo rau API 5L X70 yeeb nkab?
A:Rau vuam API 5L X70 yeeb nkab, qis-hydrogen electrodes xws li E7018 los yog cov hlau muab tub lim sib piv (xws li E80C-G) raug pom zoo kom ua kom lub siab tawv thiab tiv thaiv kev tawg.
5. Q: Dab tsi yog qhov hardness txwv rau ASTM A53 Qib B welded yeeb nkab?
A:ASTM A53 tsis tau qhia txog kev txwv hardness, tab sis rau cov kev siv qaub, hardness feem ntau yog tswj kom qis dua 22 HRC (los yog 250 HB) kom txo tau sulfide kev nyuaj siab tawg.
