1. Q: "ERW" txhais li cas, thiab cov qib twg feem ntau siv nws?
A: ERW stands rau Hluav taws xob Resistance Welded. Cov qib ERW cov yeeb nkab feem ntau suav nrog ASTM A53 Qib B (Hom E lossis F), API 5L Qib B, thiab EN 10255 S235JRH.
2. Q: Dab tsi yog qhov cuam tshuam ntawm leej faj cov ntsiab lus ntawm cov weldability ntawm qis - carbon steel yeeb nkab zoo li S235JR?
A: Cov ntsiab lus qis qis (piv txwv li, max 0.045% hauv S235JR ib EN 10025-2) txhim kho weldability los ntawm kev txo cov kev pheej hmoo ntawm solidification cracking (kub tawg). "JR" qhia txog yam tsawg kawg nkaus lub zog ntawm chav tsev kub.
3. Q: Vim li cas ASTM A500 Qib B siv rau kev siv cov qauv siv tsis yog A53?
A: ASTM A500 npog txias - ua welded thiab seamless carbon steel structural tubing. Nws cov specifications (xws li tensile thiab yield zog) yog optimized rau structural kev ncaj ncees nyob rau hauv txhua kab, kab, thiab thav duab, whereas A53 yog rau siab thiab mechanical kev siv.
4. Q: Dab tsi yog qhov tseem ceeb ntawm "L" hauv API 5L?
A: "L" sawv cev rau "Line Pipe." Nws qhia tau hais tias cov yeeb nkab yog tsim los rau ib qho kev qhia tshwj xeeb uas tsim los rau ntev - nrug, siab - cov kev pabcuam kav dej.
5. Q: Qhov txawv ntawm PSL1 thiab PSL2 hauv API 5L yog dab tsi?
A: PSL2 (Product Specification Level 2) muaj cov kev cai nruj dua li PSL1, suav nrog kev tswj cov tshuaj lom neeg nruj dua (piv txwv li, qis carbon, phosphorus, sulfur), muaj zog dua (Charpy impact testing yuav tsum), thiab nruj dua cov cuab yeej ntsuas.
