What is a Class 800 valve?

Raws li ASME B16.34, Chav Kawm 800 valve sawv cev rau lub siab - chav ntsuas kub, feem ntau siv hauv me me -bore forged steel li qub nrog lub qhov (socket weld) thiab threaded kawg.

✔️ Noj cov khoom siv carbon steel ASTM A105 ua piv txwv, nyob rau hauv qhov kub ib txwm ntawm -20℃F txog 100℃F, nws qhov siab tshaj plaws ua haujlwm siab yog 1975 psig (kwv yees li 13.6 MPa). Thaum qhov nruab nrab kub nce mus txog 400℃F, qhov ntsuas no poob rau 1545 psig. Kev xaiv engineering yuav tsum xa mus rau lub rooj ntsuas kub-kub hauv tus qauv thiab yuav tsum tsis txhob kwv yees ncaj qha los ntawm tus nqi "800".

✔️ Hauv cov kav dej tiag tiag, kev nkag siabrooj vag valve class 800kev ntsuas siab xav tau kev sib txuas cov khoom siv thiab kev ua haujlwm kub. Plhaub phab ntsa thickness thiab sealing khub tsim yuav tsum ua kom tau raws li qhov yuav tsum tau muaj zog raws li cov xwm txheej. Feem ntau, lub valve ntsuas siab yog ua raws li API 598, uas yog 1.5 npaug ntawm qhov ntsuas kub ib txwm muaj (piv txwv li, 2962.5 psig).

✔️Rau cov xwm txheej uas nquag pib- nres lossis kub hloov pauv, forged steel rooj vag valve chav kawm 800 dhau los ua qhov kev xaiv. Forging tshem tawm cov porosity sab hauv, thiab cov nplej ntws mus tas li, ua rau muaj kev qaug zog zoo dua li cov castings.

Rau lub rooj vag li qub ua los ntawm ASTM A105 los yog A182 F304 forgings, lub cev -bonnet kev twb kev txuas feem ntau yog siv welded los yog bolted pob qij txha, ua raws li API 602.

✔️ Tsis tas li ntawd, cs rooj vag valve chav kawm 800 (cov pa roj carbon steel valve) muab cov neeg paub tab qis - nqi kev daws teeb meem hauv cov khoom tsis yog - corrosive lossis me me corrosive media xws li dej, roj, thiab cov pa roj carbon monoxide tsawg, nrog rau cov khoom siv hluav taws xob tsawg - raws li cov kev xav tau tshwj xeeb.

✔️Nyob rau hauv me me - bore pipelines, 3/4 "qhov rooj valve chav kawm 800 yog heev heev. Qhov luaj li cas ntawm chav kawm 800 forged steel rooj vag valve feem ntau txais tag nrho bore los yog txo bore tsim, nrog kawg qhov ntev raws li ASME B16.11 (socket weld los yog NPT xov).

✔️Nyob rau hauv cov xwm txheej xws li siab -siab chav tracing, boiler feedwater bypass, thiab ntsuas kev rho tawm valve manifolds, 3/4-nti loj sib npaug ntws muaj peev xwm nrog qhov chaw nruab.

✔️Refinery txij nkawm cov ntaub ntawv qhia tau hais tias kom raug xaiv Class 800 forged gate li qub (nrog rau cov pa roj carbon steel thiab alloy steel cov ntaub ntawv) tuaj yeem txo qhov kev pheej hmoo ntawm kev tawm sab nraud nyob rau hauv siab - siab thiab siab - qhov kub thiab txias.

✔️Thaum xaiv, nws tseem yuav tsum tau kuaj xyuas cov khoom qia (piv txwv li, 13Cr lossis 304) thiab ntim khoom (hloov graphite lossis PTFE) kom ntseeg tau tias muaj kev sib haum xeeb nrog qhov nruab nrab.

📌Raws li qhov ntsuas qhov ntsuas siab derating nkhaus hauv cov ntawv txuas ntxiv ntawm ASME B16.34, txawm tias qis dua 650℃F kev ua haujlwm, Chav 800 valve tseem tuaj yeem tswj hwm qhov kev nyab xeeb ntawm kwv yees li 970 psig.