1. Q: Dab tsi yog qhov txawv ntawm API 5L thiab ASTM A106 raws li qhov tseem ceeb ntawm daim ntawv thov?
A: API 5L yog tshwj xeeb rau kev thauj mus los hauv cov kav dej hauv kev lag luam roj av thiab cov nkev. ASTM A106 yog rau kev ua haujlwm siab - qhov kub thiab txias kev pabcuam hauv cov nroj tsuag, chaw nres tsheb fais fab, thiab cov chaw tsim khoom.
2. Q: Lub npe tus qauv rau cov pa roj carbon steel yeeb nkab siv hauv kev siv piling.
A: ASTM A252 npog welded thiab seamless steel yeeb nkab pawg. Cov qib sib xws yog Qib 2 (50 ksi tawm los) thiab Qib 3 (55 ksi tawm los).
3. Q: Dab tsi yog cov qib seamless yeeb nkab rau kev siv dej dav dav (hydraulic / pneumatic)?
A: ASTM A106 Qib B lossis mechanical tubing rau ASTM A519 (piv txwv li, 1020, 1026).
4. Q: Tus qauv ASTM twg yog siv dub thiab kub -dipped zinc-coated (galvanized) welded thiab seamless steel yeeb nkab rau kev siv zoo tib yam?
A: ASTM A53 yog tus qauv tseem ceeb, npog ob qho tib si dub thiab galvanized tiav (nrog galvanizing ib specification A153).
5. Q: Cov qhab nia feem ntau raug xaiv li cas hauv ASTM A500 tus qauv rau cov qauv tubing?
A: Los ntawm ib tsab ntawv: Qib A, Qib B, Qib C, thiab Qib D, nrog nce qhov tsawg kawg nkaus lub zog thiab cov kev ntsuas sib txawv rau cov duab (puab, square, duab plaub).
