I. Lub ntsiab txhais thiab kev siv cov qauv
2H yog lub siab -lub zog, hnyav- lub luag haujlwm hexagonal txiv ntseej tshwj xeeb tsim los rau kev kub siab thiab kub kub hauv Asmeskas tus qauv. Cov qauv siv tau yog:
-Imperial units: ASTM A194 / A194M Gr.2H (khoom siv), ASME B18.2.2 (dimensions)
-Feem ntau hu ua: Heavy-cov haujlwm tuab hexagonal txiv ntseej, flange- cov txiv ntseej tshwj xeeb
-Kev kos npe: Lub ntsej muag kawg ntawm cov txiv ntoo yuav tsum tau kos nrog 2H + cov chaw tsim khoom lub cim, uas yog lub hauv paus tseem ceeb kom paub qhov txawv ntawm cov txiv ntoo zoo tib yam.
II. Cov khoom siv thiab kev kho cua sov
-Cov khoom siv: Cov pa roj carbon nruab nrab (carbon ntau dua lossis sib npaug li 0.40%), muaj pes tsawg leeg: C 0.40 ~ 0.48%, Si Less dua lossis sib npaug li 0.40%, Mn Tsawg dua lossis sib npaug li 1.00%, sulfur thiab phosphorus nruj me ntsis tswj kom tsis muaj impurities.
- txheej txheem: Quenching + siab -kub tempering (455 degree), tag nrho quenching thiab tempering, ntsuas siab zog thiab toughness.
-Hardness range: Brinell HB 248 ~ 352, haum rau qhov kub thiab txias tsis muaj qhov tawg.
III. Sab nrauv nta
Piv rau lub teb chaws tus qauv GB6170 zoo tib yam hexagonal txiv ntseej:
-Nrog cov flanges dav dua thiab tuab dua, lub siab -cov kabmob sib tiv tauj tau nce ntxiv, ua rau flange nto tsis tshua muaj kev sib tsoo.
-Nrog ntau cov xov sib txuas, nws lub zog tensile thiab tiv thaiv - muaj peev xwm tshem tawm tau zoo dua li cov txiv ntoo txheem.
-Cov thickness tag nrho yog nce, ua rau nws haum rau siab - torque fastening, ntev - lub sij hawm vibration, thiab siab - kub creep tej yam kev mob.
IV. Muaj kev xaiv kho qhov chaw
-Oxidation blackening (dub oxide): txoj kev siv ntau tshaj plaws, cov cuab yeej txheem thiab cov yeeb nkab flanges.
-Kub-dip galvanized (HDG): Sab nraum zoov, steel qauv tiv thaiv corrosion.
-Electroplated zinc, Dacromet, PTFE xiav txheej: tiv thaiv -corrosion + anti- txeeb, tshwj xeeb rau cov roj thiab roj qhov dej.
V. 2H Nut vs. National Standard 8/10 Grade Nut
| Sib piv cov khoom | ASTM A194 Qib 2H Heavy Hex Txiv Ntoo | GB 6175 Thickened Hex Txiv Ntoo (Class 8 / Class 10) |
|---|---|---|
| Tsim Qhov Chaw | Tshwj xeeb yog siv rau siab - kub thiab siab - cov hlab ntsha siab | General mechanical structural parts for normal temperature service |
| Qhov siab tshaj plaws ntev -Tsev Kev Pabcuam Kub | 425 degree | Tsawg dua lossis sib npaug li 200 degree; mechanical zog poob drastic nyob rau hauv siab kub |
| Matched Fasteners | A193 B7 / B16 tshav kub-resistant studs | Chav Kawm 8.8 / 10.9 carbon steel bolts |
| Creep Resistance | Zoo heev, haum rau kev sib txuas siab siab -kub bearing siab | pluag; Nws yooj yim rau loosening thiab nruab nrab to hauv qab kub |
| Siv tau tej yaam num | Petrochemical nroj tsuag, chaw nres tsheb fais fab, siab - cov cuab yeej tshwj xeeb siab | Cov cuab yeej siv tshuab dav dav, ib txwm -kub steel qauv |
VI. Hom Daim Ntawv Thov Scenarios
-Petrochemical/Refining: Cov hlab ntsha siab, cov khoom siv hluav taws xob sib hloov, siab -kub thiab siab - siab flanges
-Power nroj tsuag: boiler, chav pipeline, turbine flange kev twb kev txuas
-Kev rho tawm roj thiab roj: lub qhov taub, cov kav dej, cov khoom siv drilling
-Cov qauv hlau hnyav: txuas hniav, cov khoom siv loj hauv paus, siab - siab li qub
Yog tias koj ntsib teeb meem hais txog kev qhia tshwj xeeb, kev kho saum npoo, lossis lwm yam hauv lub sijhawm sib txuas lus, xaiv cov khoom siv, lossis ntawm -kev sib dhos, thov hu rau peb. Handan Jihao Fasteners muab koj cov lus qhia kev tshaj lij.
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