1. Dab tsi ua rau weld hlaws tsis xws hauv ERW?
Feem ntau ua rau: vuam tsis zoo, tsis txaus siab, oxide suav nrog, sib sau tsis sib xws, ntug tsis zoo.
2. Dab tsi yog qhov txias expansion yeeb nkab?
Txias expansion zooroundness, dimensional precision, thiab nto tiav, thiab relieves kev nyuaj siab.
3. Cov yeeb nkab galvanizing yog dab tsi?
Galvanizing daim ntawv azinc txheejlos tiv thaiv xeb thiab corrosion, dav siv rau scaffolding, conduit, laj kab yeeb nkab.
4. Dab tsi yog dub steel yeeb nkab?
Dub yeeb nkab yog uncoated carbon steel yeeb nkab, feem ntau oiled los tiv thaiv ib ntus xeb. Siv rau roj, hluav taws kub sib ntaus, qauv.
5. Qhov txawv ntawm Schedule 40 thiab Schedule 80 yog dab tsi?
Teem caij 80 muajphab ntsa tuabthiab kev ntsuas siab siab dua li Teem sijhawm 40 nrog tib txoj kab uas hla.
