Q: Dab tsi yog qhov tsawg kawg nkaus zinc txheej thickness rau GB / T 3091 kub -dip galvanized welded kav? A: For GB/T 3091 hot-dip galvanized welded pipes, the minimum zinc coating thickness is 86 μm (3.4 mils) for pipes with a nominal diameter ≤100 mm, and 100 μm (3.9 mils) for pipes with a nominal diameter >100 hli.
Q: GB / T 3091 welded kav puas siv tau rau cov kav dej hauv av?A: Yog, GB / T 3091 kub-dip galvanized welded kav yog dav siv rau cov kav dej hauv av vim tias lawv cov zinc txheej muaj kev tiv thaiv zoo tiv thaiv av thiab dej hauv av.
Q: Dab tsi yog qhov txawv ntawm GB / T 3091 Qib Q235A thiab Q235B welded kav?A: Qhov sib txawv tseem ceeb yog qhov yuav tsum tau kuaj qhov cuam tshuam: Q235B yuav tsum muaj Charpy V-qhov ntsuas qhov cuam tshuam ntawm 20℃(qhov cuam tshuam tsawg kawg nkaus ntawm 27 J), thaum Q235A tsis tas yuav muaj qhov cuam tshuam. Q235B yog qhov tsim nyog rau qis- qhov kub thiab txias los yog cov xwm txheej dynamic load.
Q: Dab tsi yog qhov siab tshaj plaws ua haujlwm kub ntawm ASTM A106 Qib B welded yeeb nkab?A: ASTM A106 Qib B welded yeeb nkab yog tsim los rau siab - kev pabcuam kub, nrog rau qhov siab tshaj plaws ua haujlwm kub ntawm 427℃(800℃F), ua rau nws haum rau boiler feedwater, chav, thiab siab - kub gas pipelines.
Q: Puas yog ASTM A106 Qib C welded yeeb nkab qib siab dua qib B?A: Yog lawm, ASTM A106 Qib C muaj cov khoom siv ntau dua li Qib B: nws qhov kev tawm dag zog yam tsawg kawg nkaus yog 345 MPa (50,000 psi) (vs . 276 MPa rau Qib B), thiab lub zog tensile yam tsawg kawg nkaus yog 517 MPa (75,000 psi) (vs . 485) MPa rau qib Nws yog siv rau kev siv kub thiab siab dua.
