Kev xaiv kom raug ntawm seamless steel kav yog qhov paub zoo heev!

Dab tsi yog qhov yuav tsum tau xaiv cov kav dej seamless steel rau kev thauj mus los uas feem ntau siv hauv peb cov txheej txheem kev lag luam? Saib cov ntsiab lus ntawm peb cov neeg ua haujlwm siab pipeline:

Seamless steel kav yog cov kav hlau tsis muaj welds tsim los ntawm kev kho kub xws li tho thiab kub dov.

Yog tias tsim nyog, cov yeeb nkab kho kub tuaj yeem ua kom txias ntxiv mus rau qhov xav tau cov duab, qhov loj thiab kev ua haujlwm. Tam sim no, seamless steel kav (DN15-600) yog cov kav dej siv dav tshaj plaws hauv cov khoom siv petrochemical.

(1) Seamless Carbon steel yeeb nkab

Khoom siv hlau qib: 10 #,20#,09mn wb,16 Mnhauv 4 hom

Txheem:

GB8163 Seamless Steel Yeeb Nkab rau Kev Pabcuam Dej

GB / T9711 Petroleum thiab natural gas industries-Steel yeeb nkab rau pipeline tsheb thauj mus los systems

GB6479 High-pressure seamless steel yeeb nkab rau cov khoom siv chiv "

GB9948 Seamless steel raj rau roj av tawg

GB3087 Seamless steel yeeb nkab rau qis thiab nruab nrab siab boiler

GB / T5310 Seamless steel raj thiab kav dej rau kev kub siab boiler

GB / T8163: Cov Khoom Siv Hlau Qib: 10 #, 20 #, Q345, thiab lwm yam.

Scope ntawm daim ntawv thov: roj, roj thiab roj thiab pej xeem xov xwm uas nws tsim kub yog tsawg tshaj li 350 ℃ thiab siab yog tsawg tshaj li 10MPa.

GB6479: Khoom siv hlau Qib: 10 #, 20G, 16Mn, thiab lwm yam.

Scope ntawm daim ntawv thov: roj thiab roj nrog tsim kub -40～400 ℃ thiab tsim siab 10.0～32.0MPa

GB9948:

Khoom siv hlau Qib: 10 #, 20 #, thiab lwm yam.

Scope ntawm daim ntawv thov: lub sijhawm uas GB / T8163 steel yeeb nkab tsis haum.

GB3087:

Khoom siv hlau Qib: 10 #, 20 #, thiab lwm yam.

Scope ntawm daim ntawv thov: superheated chav thiab boiling dej rau tsawg thiab nruab nrab siab boilers.

GB5310:

Khoom siv hlau Qib: 20G thiab lwm yam.

Scope ntawm daim ntawv thov: superheated chav nruab nrab ntawm kev kub siab boiler

Kev tshuaj xyuas: Feem ntau steel kav rau kev thauj mus los ntawm cov kua dej yuav tsum tau soj ntsuam cov tshuaj muaj pes tsawg leeg, ntsuas tensile, flattening test thiab hydraulic test. GB5310, GB6479, thiab GB9948 tus qauv steel kav, ntxiv rau cov kev ntsuam xyuas uas yuav tsum tau ua ntawm cov kav dej steel rau kev thauj cov kua dej, kev ntsuas hluav taws xob thiab kev ntsuas cuam tshuam kuj tseem yuav tsum tau ua; qhov kev tshuaj xyuas kev tsim khoom rau peb cov kav hlau steel no kuj nruj heev. Tus qauv GB6479 kuj ua rau tshwj xeeb cov kev cai rau qhov kub thiab txias cuam tshuam toughness ntawm cov khoom. Ntxiv rau qhov kev sim dav dav ntawm cov kav dej steel rau kev thauj mus los, cov kav hlau steel ntawm GB3087 tus qauv kuj tseem xav tau kev ntsuas txias txias. GB / T8163 tus qauv steel kav, ntxiv rau cov kev ntsuas dav dav rau cov kav dej thauj cov kav dej, raws li kev pom zoo yuav tsum muaj qhov ntsuas kev nthuav dav thiab kev ntsuas txias txias. Kev tsim cov kev cai ntawm ob hom raj no tsis nruj raws li thawj peb hom.

Kev tsim khoom: GB / T8163 thiab GB3087 tus qauv steel kav feem ntau smelted nyob rau hauv qhib hearth los yog converter, thiab lawv impurities thiab sab hauv tsis xws luag kuj loj. GB9948 feem ntau siv hluav taws xob rauv smelting. Feem ntau ntawm lawv tau koom nrog cov txheej txheem kho kom zoo sab nraud ntawm lub qhov cub, thiab qhov muaj pes tsawg leeg thiab cov khoom siv sab hauv yog qhov me me. Cov qauv GB6479 thiab GB5310 lawv tus kheej tau teev tseg cov kev cai rau kev ua kom zoo sab nraum lub qhov cub, nrog rau qhov tsis zoo ntawm cov khoom tsis zoo thiab cov khoom siv sab hauv, thiab cov khoom siv zoo tshaj plaws.

Kev xaiv: Feem ntau, GB / T8163 tus qauv steel yeeb nkab yog tsim rau cov roj, roj thiab roj thiab kev tshaj tawm pej xeem nrog tus qauv tsim kub tsawg dua 350 ° C thiab lub siab tsawg dua 10.0MPa; rau cov roj, roj thiab roj xov xwm, thaum tsim kub tshaj 350 ° C Los yog thaum lub siab siab tshaj 10.0MPa, GB9948 los yog GB6479 txheem steel kav yuav tsum tau siv; rau cov kav dej ua haujlwm hauv hydrogen, lossis cov kav dej ua haujlwm hauv qhov chaw muaj kev ntxhov siab corrosion, yuav tsum siv cov qauv GB9948 lossis GB6479. Tag nrho cov pa roj carbon steel kav siv nyob rau hauv qhov kub thiab txias (tsawg dua -20 ° C) yuav tsum tau txais tus qauv GB6479, thiab tsuas yog nws qhia txog qhov yuav tsum tau ua rau qhov kub thiab txias ntawm cov khoom toughness. Cov qauv GB3087 thiab GB5310 yog cov qauv tsim tshwj xeeb rau boiler steel kav. Lub "Boiler Safety Supervision Regulations" qhia tias tag nrho cov kav dej txuas nrog lub boiler yog nyob rau hauv kev saib xyuas, thiab kev siv cov ntaub ntawv thiab cov qauv yuav tsum ua raws li cov kev cai ntawm "Boiler Safety Supervision Regulations". Yog li ntawd, lawv yog siv nyob rau hauv boilers, fais fab chaw nres tsheb, cua sov thiab petrochemical ntau lawm chaw. Tag nrho cov kav dej rau pej xeem (muab los ntawm qhov system) yuav tsum tau txais cov qauv GB3087 lossis GB5310. Nws yog ib qho tsim nyog sau cia tias tus nqi ntawm cov kav hlau steel nrog cov qauv zoo steel yeeb nkab yog qhov siab. Piv txwv li, tus nqi ntawm GB9948 yog ze li ntawm 1/5 siab dua tus nqi ntawm GB8163 cov ntaub ntawv. Yog li ntawd, thaum xaiv cov khoom siv steel yeeb nkab qauv, kev txiav txim siab dav dav yuav tsum tau muab rau cov kev mob ntawm kev siv, uas yuav tsum tau txhim khu kev qha thiab kev lag luam. Nws tseem yuav tsum tau muab sau tseg tias cov kav hlau steel raws li GB / T20801 thiab TSGD0001, GB3087 thiab GB8163 tus qauv yuav tsum tsis txhob siv rau GC1 pipelines (tshwj tsis yog ib qho los ntawm ib qho yog ultrasonic, qhov zoo tsis qis dua L2.5, thiab nws tuaj yeem ua tau. siv rau GC1 nrog lub siab tsim tsis siab tshaj 4.0Mpa pipeline).

（二）Tsawg alloy yeeb nkab seamless steel yeeb nkab

Hauv cov khoom siv petrochemical, feem ntau siv chromium-molybdenum steel thiab chromium-molybdenum-vanadium steel seamless steel yeeb nkab qauv yog GB9948 "Seamless steel yeeb nkab rau roj av tawg" GB6479 "High-pressure seamless steel yeeb nkab rau cov khoom siv chiv" GB / T5310 "Seamless steel yeeb nkab rau high-pressure boiler》GB9948 muaj chromium-molybdenum steel cov ntaub ntawv qib: 12CrMo, 15CrMo, 1Cr2Mo, 1Cr5Mo, thiab lwm yam. Cov chromium-molybdenum steel cov ntaub ntawv qib suav nrog GB6479: 12CrMo, 15CrMo, 1Cr5Mo, thiab lwm yam GB / T5310 chromium molybdenum steel hlau Cov khoom siv qib: 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG, thiab lwm yam.

（三） Seamless stainless hlau yeeb nkab

Feem ntau siv stainless hlau seamless steel yeeb nkab qauv yog:

Muaj tsib tus qauv: GB / T14976, GB13296, GB9948, GB6479, thiab GB5310. Ntawm lawv, tsuas yog ob lossis peb qib stainless hlau cov khoom siv tau teev nyob rau hauv peb cov qauv kawg, thiab lawv tsis yog cov khoom siv feem ntau.

Yog li ntawd, thaum stainless hlau seamless steel yeeb nkab qauv siv nyob rau hauv engineering, GB / T14976 thiab GB13296 qauv yog siv.

GB / T14976 "Stainless steel seamless steel yeeb nkab rau kev thauj mus los":

Cov ntaub ntawv qib: 304, 304L thiab lwm yam 19 yam tsim nyog rau kev thauj mus los dav dav.

GB13296 "Stainless steel seamless steel raj rau boilers thiab kub exchangers":

Cov ntaub ntawv qib: 304, 304L thiab lwm yam 25 yam.

Ntawm lawv, ultra-low-carbon stainless hlau (304L, 316L) muaj corrosion kuj zoo heev. Raws li qee qhov xwm txheej, nws tuaj yeem hloov kho cov hlau tsis huv (321, 347) rau kev tiv thaiv corrosion rau kev tshaj tawm; ultra-low-carbon stainless hlau muaj qhov kub-kub txhua yam khoom, feem ntau tsuas yog siv thaum kub hauv qab 525 ℃; ruaj khov austenitic stainless hlau muaj ob qho tib si zoo corrosion kuj thiab kub txhua yam khoom, tab sis Ti nyob rau hauv 321 yog yooj yim oxidized thiab ploj thaum lub sij hawm vuam, yog li txo nws cov anti-corrosion kev ua tau zoo, nws cov nqi kuj yog siab, cov khoom no feem ntau yog siv nyob rau hauv ntau. Lub sijhawm tseem ceeb, 304, 316 muaj kev ua haujlwm zoo los tiv thaiv corrosion, tus nqi pheej yig, yog li nws yog dav siv.