1. Q: Dab tsi yog tus qauv tshwj xeeb rau dub thiab kub -dipped galvanized welded thiab seamless steel yeeb nkab rau kev tiv thaiv hluav taws?
A: ASTM A795 Cov Ntawv Pov Thawj Cov qhab nia feem ntau yog A, B, thiab C, nrog Qib B tau nquag teev.
2. Q: Cov pa roj carbon steel qib twg / tus qauv feem ntau yog siv rau boiler raj?
A: ASTM A192 rau siab - siab seamless boiler raj (tsawg- carbon steel). Nws qhia txog cov ntsiab lus carbon max ntawm 0.12-0.15%.
3. Q: Dab tsi yog qib seamless raj rau refinery thiab siab - kev pab cuam kub exchanger?
A: ASTM A179 rau seamless txias-tso qis- carbon steel tshav kub- exchanger thiab condenser raj.
4. Q: Rau seamless ferritic alloy-steel yeeb nkab rau siab- kub kev pab cuam, dab tsi yog ib qho qis- alloy carbon- qib molybdenum?
A: ASTM A335 Qib P1 (0.5% Molybdenum). (Ceeb Toom: Thaum cov hlau alloy, nws feem ntau yog pawg nrog cov hlau rau cov kav dej).
5. Q: "PSL2" txhais li cas hauv API 5L, thiab nws txawv li cas ntawm PSL1 rau Qib B?
A: PSL2 (Product Specification Level 2) muaj cov kev cai nruj dua li PSL1, suav nrog kev ua kom muaj zog ntau dua (Charpy impact test), nruj chemistry tswj, thiab cov cuab yeej sib txawv. API 5L Qib B PSL2 muaj qhov tsawg kawg nkaus yield zog ntawm 42 ksi vs . 35 ksi rau PSL1.
