1. Thaum siv cov kav dej kub-dip galvanized steel kav rau ntawm cov phab ntsa sab hauv thiab sab nrauv ntawm cov hluav taws kub hydrant dej system kav, vuam yuav tsum tsis txhob siv. Thaum cov kav dej siv cov kav dej uas tsis yog-corrosion-resistant rau ntawm phab ntsa sab hauv, nws tuaj yeem txuas nrog vuam, tab sis cov vuam ntawm cov kav dej yuav tsum ua tau raws li qhov yuav tsum tau ua.
2. Galvanized steel kav nrog ib txoj kab uas hla ntawm cov yeeb nkab> 100mm ntawm qhov hluav taws kub hydrant dej system yuav tsum txuas nrog flanges lossis grooves. Yog hais tias cov yeeb nkab txoj kab uas hla ntawm lub tshuab tsis siv neeg sprinkler yog ntau tshaj 100mm, nws tsis tau teev tias threaded kev twb kev txuas siv tsis tau.
3. Rau cov kav dej ntawm qhov hluav taws kub hydrant dej system thiab lub tshuab sprinkler, nws raug nquahu kom siv cov flanges threaded thaum siv flanged kev sib txuas, thiab lwm yam galvanizing yuav tsum tau nqa tawm thaum welded flanges siv.
4. Thaum twg cov yeeb nkab seem yuav tsum tau hloov cov yeeb nkab txoj kab uas hla, tus qauv txo cov yeeb nkab txuas thiab cov yeeb nkab fittings yuav tsum tau siv.
5. Rau txoj kev sib txuas ntawm cov kav hluav taws xob tiv thaiv hluav taws xob thiab cov kev xav tau ntsig txog, thov saib cov kev cai cuam tshuam hauv "National Civil Construction Engineering Design Technical Measures - Water Supply and Drainage".
