1.}} Astm A691 yog tus qauv tsim hluav taws xob wended steel fusion welded cov pa roj carbon thiab alloy steel kav kev mob.
2.} Cov khoom siv thiab qib
Take A691Gr1 - 1/4CrCL22 as an example, "1 - 1/4Cr" represents the grade of steel pipe, specifically a steel containing 1.25% chromium and 0.5% molybdenum; "22" Qhia txog lub xeev kho cua sov.
3.} lub ntsiab siv
Nws yog tsuas yog siv rau cov steel hlau thiab allolo cov nroj tsuag welded steel nominal kav rau piv txwv, sau tshuaj lom neeg welded yeeb nkab {{5 5 5}}
4. Cov Khoom Nta
Cov qauv hlau no muaj kev ua tau zoo heev, thiab nws nyuaj rau kev lees paub hauv welded yeeb nkab siv tau ua thoob tebchaws.
5.}} muaj feem xyuam kev kuaj xyuas zoo
Thaum cov qib ntawm cov yeeb nkab steel ncav cuag sa691gr1 - 1}}}}}}}}}}}}}}} }radicic thiab kev ntsuas dej siab thiab tso dej siab}
6. sib piv nrog lwm cov ntaub ntawv
Nws yog sib npaug rau seamless cov yeeb nkab sa- 335 P22, tab sis A691 yog siv los ua welded yeeb nkab, thaum Asmeskas yog American txheem seamless yeeb nkab
