1. ASTM A671 CH115 Class 20 Steel Pipe yog dab tsi?
Teb:
ASTM A671 CH115 Chav Kawm 20 yog ib qhohluav taws xob -fusion-welded (EFW) steel yeeb nkabtsim rauqis- kub thiab siab - kev pabcuam siab. Lub "CH115" txhais tau tias acarbon-manganese- qib silicon steelnrog txhim kho lub zog, thaum "Class 20" qhia aHydrostatic test siab ntawm 200 psi(siab tshaj hoob 22). Cov kav dej no siv rau hauvcryogenic, hluav taws xob, thiab petrochemical kev lag luam.
2. Cov khoom tseem ceeb thiab cov khoom muaj pes tsawg leeg?
Teb:
Khoom siv:CH115 qib (C-Mn-Si steel) nrogsiab tensile zogtshaj CG100.
Tensile zog:Ntau tshaj lossis sib npaug rau 70 ksi (483 MPa).
Impact Toughness:Yuav tsum muaj rau sub-zero kub (xws li -50℃F/-45℃).
Vuam:EFW txheej txheem nrog100% radiographyrau seam kev ncaj ncees.
3. Hom kev siv CH115 Class 20 Pipes?
Teb:
Cryogenic systems(LNG, kua oxygen pipelines).
Cov nroj tsuag muaj zog(siab-cov kab hluav taws xob siab, cov khoom siv boiler).
Roj & roj(Kev xa cov kav dej, kev pabcuam qaub yog ua raws li NACE MR0175).
Cov txheej txheem kev lag luamyuav tsum tau ductility ntawm qhov kub thiab txias.
4. Chav Kawm 20 txawv li cas ntawm Lwm Chav A671?
Teb:
Kev ntsuas siab:Chav kawm 20 raug sim ntawm200 psi(vs. Class 22's 100 psi).
Thickness:Feem ntau tuab dua cov chav kawm qis (piv txwv li, Chav Kawm 12).
Kev kuaj:Txoj caihydrostatic + xaiv tsis muaj kev kuaj xyuas(eg, UT, RT).
5. Kev tswj cov qauv thiab cov ntawv pov thawj?
Teb:
Primary Standard:ASTM A671 (EFW kav dej rau qis-temp kev pabcuam).
Cov Qauv Ntsuas:ASTM A370 (mechanical), ASTM A435 (radiographic).
Tsim Codes:ASME B31.3 (txheej txheem piping).
Yeem:NACE MR0175 rau corrosive ib puag ncig.
