Monel 400 hauv Kev Pabcuam Oxygen: Kev Ua Kom Huv Huv thiab Kev Ntsuas Hluav Taws Xob rau ASTM G94

Monel 400(UNS N04400) yog ib qho ntawm cov hlau uas nyiam tshaj plaws rau kev pabcuam oxygen vim tias nws muaj qhov kub nyhiab heev thiab, yog tias ignited, nplaim taws tsawg heev -kev nthuav tawm (hlawv) tus nqi; nws txoj kev siv nyab xeeb, txawm li cas los xij, nyob ntawm txhua qhov ntawm kev huv huv huv - tsis muaj roj, roj, lossis cov khoom siv - thiab ntawm kev txheeb xyuas kev sib raug zoo raws li ASTM G94 nrog kev ntsuas hluav taws xob thiab kub hnyiab xws li ASTM G124 (autoignition) thiab ASTM G125 (tus nqi hlawv).

Monel 400 in Oxygen Service

Hauv ib kab lus: qhia Monel 400 rau oxygen lub luag haujlwm nkaus xwb nrog cov khoom ntxuav rau ASTM G93 / CGA G-4.1 qib kev huv thiab tsim nyog los ntawm G94- hais txog kev kub hnyiab / qhov hluav taws kub, vim tias cov hlau huv si - tsis yog hlau xaiv - yog dab tsi tiv thaiv hluav taws kub.

Hauv cov pa oxygen-ib puag ncig zoo yuav luag txhua yam hlau tuaj yeem hlawv yog tias muaj mob hnyav txaus, yog li kev xaiv cov khoom siv ntxiv rau kev huv huv txiav txim siab seb qhov hluav taws kub me me dhau los ua qhov hluav taws kub puas tsuaj; Qee cov hlau (titanium, carbon steel) ignite thiab propagate nplaim taws ntau dua li lwm tus (tooj liab, Monel 400).

Oxygen txhawb combustion aggressively: ib tug xau, particle cuam tshuam, los yog ib tug kab mob yuav tso tawm txaus tshav kub rau ignite hlau. Thaum cov hlau ignites, cov lus nug yog seb cov nplaim taws txhawb nqa thiab propagates - uas nyob ntawm cov hlau qhov kub thiab qhov hluav taws kub, ob qho tib si sib txawv los ntawm cov khoom siv thiab cov pa oxygen.

Cov kab mob:Cov kab mob hydrocarbon (roj, roj) ignite ntawm lub zog qis - cov pa oxygen ntau tshaj - hluav taws kub.
Siab:Hauv siab - siab oxygen, txawm tias ib txwm 'kev nyab xeeb' hlau tuaj yeem hlawv; siab yog qhov hloov pauv tseem ceeb.
Kev taw qhia:Tus qauv txheej txheem rau kev txiav txim tag nrho cov no yog ASTM G94.

Monel 400 (Ni-Cu, UNS N04400) tau txais txiaj ntsig zoo rau kev pabcuam oxygen vim nws cov nickel-tooj liab matrix tiv thaiv hluav taws kub, xav tau lub zog siab kom pib kub hnyiab, thiab - thuam - tsis txhawb nqa cov nplaim taws sai sai li txoj kev titanium lossis carbon hlau tuaj yeem.

Ob lub zog ua kom nws sawv tawm:

High ignition pib:Monel 400's autoignition kub hauv cov pa oxygen yog siab, thiab nws ua rau qhov kub siab ntawm qhov chaw tsis muaj tus kheej - igniting ntawm nruab nrab siab.

Tsawg hlawv tus nqi:Txawm hais tias hauv zos ignited, Monel 400 muaj qhov kub hnyiab heev (nplaim- nthuav tawm) tus nqi thiab ua rau tus kheej - tua, txwv kev puas tsuaj.

Qhov no yog vim li cas Monel 400 (thiab lwm yam tooj liab-nickel alloys) tshwm nyob rau hauv oxygen li qub, regulators, manifolds, thiab piping qhov twg titanium yuav txwv tsis pub thiab carbon hlau yuav txaus ntshai.

Cov txheeb ze oxygen- hluav taws kub nyhiab ntawm qhov siab tshaj mus rau qis tshaj yog roughly titanium thiab aluminium (siab heev) - carbon steel - stainless 316 - tooj liab alloys - Monel 400 - tooj liab; Monel 400 zaum ntawm cov qauv hlau zoo tshaj plaws vim nws sib txuas lub zog nrog kev tawg qis.

Hlau	Tus txheeb ze ignition / hlawv phom sij	Kev kub hnyiab hauv O2?	Cov pa oxygen-kev txiav txim siab
Titanium (Gr 2/5)	Siab heev	Yog, muaj zog	Tsis txhob muaj oxygen
Aluminium alloys	Siab	Yog (hauv bulk/particles)	Tsis txhob muaj oxygen
Cov pa roj carbon steel	Nruab nrab -High	Yog ntawm kev kub siab	Siv ceev faj, huv si
Stainless hlau 316	Nruab nrab	Ua tau ntawm kev kub siab	Siv dav, huv si
Tooj	Tsawg	Tsis muaj / qis heev	Txais
Monel 400 (N04400)	Tsawg	Tsis muaj / qis heev	Nyiam
Inconel 600/625	Tsawg- Nruab nrab	Tsawg	Txais rau siab temp

Kev ntsuas phom sij yog siab- nyob ntawm: ntawm cov pa oxygen siab heev txawm tias Monel 400 yuav tsum muaj kev siv tau zoo huv si thiab ntws tawm - nrawm nrawm. Ib txwm paub meej nrog G94-raws li kev sim rau cov kev pabcuam tshwj xeeb.

ASTM G94 yog lub kaus 'Txoj Kev Qhia Qhia rau Kev Ntsuas Cov Khoom Siv Hauv Pas Dej-Enriched Atmospheres'; nws tsis tau sau ib qho kev sim tab sis coj koj mus rau txoj kev ignition thiab hlawv txoj kev xeem (G124, G125, G86, G63, G120, G131) raws li qhov kev tivthaiv, siab, thiab tsis ua haujlwm hom.

ASTM txoj kev	Qhov nws ntsuas
ASTM G 94	Qhia tag nrho; xaiv cov pa oxygen uas tsim nyog -kev ntsuas kev sib raug zoo
ASTM G124	Autoignition kub ntawm cov khoom hauv gaseous oxygen
ASTM G125	Cov khoom ua kua thiab cov khoom siv hluav taws kub txwv ('burn rate') hauv gaseous oxygen
ASTM G 86	Ignition rhiab heev rau txhua yam cuam tshuam hauv cov kua oxygen
ASTM G63	Kev tiv thaiv kev cuam tshuam los ntawm cov khoom siv hauv cov kua oxygen
ASTM G120	Mechanical cuam tshuam thiab kev sib txhuam ignition hauv gaseous oxygen
ASTM G131 / G132	Kev sib txhuam ignition screening hauv oxygen
ASTM G 93	Kev tu cov txheej txheem thiab qib kev huv ntawm cov khoom siv oxygen

Rau Monel 400 Cheebtsam, cov kev tsim nyog tshaj plaws yog qhov kub hnyiab- ntsuas ntsuas (G125) thiab autoignition- ntsuas kub (G124), txhawb nqa los ntawm kev ua kom huv huv G93.

Oxygen-cov khoom siv yuav tsum tau muab ntxuav kom huv rau ASTM G93 / CGA G-4.1 txwv - yam tseem ceeb tsis muaj roj, roj, thiab cov khoom seem - nrog rau qib kev lees paub xws li cov khoom tsis muaj hluav taws xob (NVR) ntawm lossis qis dua li ntawm 100 mg ib ft25 ntawm qhov chaw thiab cov roj hauv qab no / ft25 ntawm cov roj thiab cov roj particle- suav txwv.

Kev huv huv parameter	Hom kev lees txais txwv (tus neeg sawv cev)	Vim li cas thiaj tseem ceeb
Nonvolatile residue (NVR)	<= 100 mg / ft2 of surface (approx.)	Residue tuaj yeem tuav lub zog combustion
Roj / roj	<= 350 mg / m2 (or wipe test negative)	Hydrocarbons yog cov khoom siv hluav taws xob zoo tshaj plaws
Particulate suav	Tsawg particle load; eg<= 350 particles / ft2 (>= 5 micrometer), txheeb xyuas los ntawm kev ua piv txwv	Particles erodes thiab sparks ntawm kev cuam tshuam
Fibers / lint	Tsis pom	Nws tuaj yeem cuam tshuam cov hydrocarbons, abrade
Chlorides / halides	Zero residue	Pitting + zog concentration
Pom kev	Bright, unsoiled hlau	Kev kuaj xyuas sai

Cov kev txwv tseeb nyob ntawm cov pa oxygen siab thiab kev pabcuam (CGA G-4.1 txhais cov chav kawm huv). Kev ua pa siab / kev lag luam oxygen yog qhov nruj tshaj plaws. Nco ntsoov qhia qhov huv huv ntawm qhov kev yuav khoom.

ASTM G125 ntsuas cov khoom siv hluav taws kub txwv - qhov tseem ceeb txawm tias nws kub hnyiab npaum li cas - los ntawm kev igniting tus qauv hauv cov pa oxygen txaus; Monel 400 feem ntau qhia tau hais tias qhov kub hnyiab tsawg heev lossis tus kheej - tua, lees paub tias nws yog- cov hlau tsis zoo rau cov pa oxygen.

Qhov kev xeem ua haujlwm li cas hauv cov ntsiab lus dawb:

Kev teeb tsa:Ib qho piv txwv zoo li tau muab tso rau hauv qhov siab - siab oxygen chamber.
Ignition:Ib qho hluav taws xob tswj hluav taws xob (xws li, cov hlau kub lossis fuse) pib nplaim taws ntawm ib qho kawg.
Kev ntsuas:Cov neeg soj ntsuam ntsuas seb cov nplaim hluav taws propagates thiab ntawm qhov ceev ('burn rate').
Qhov tshwm sim:Cov hlau uas propagate qeeb lossis nres yog ntsuas qhov phom sij tsawg; cov uas kub hnyiab heev yog qhov txaus ntshai heev.

Monel 400 tus nqi tsis tu ncua raws li lub tshuab hluav taws xob tsis zoo - nws cov nplaim taws tsis tuaj yeem nthuav tawm lossis tuag sai sai - uas yog qhov laj thawj tseem ceeb uas nws tau teev tseg rau cov pa oxygen li qub, regulators, thiab manifolds.

ASTM G124 txiav txim siab qhov kub thiab txias autoignition - qhov kub ntawm cov khoom siv tus kheej - ignites hauv gaseous oxygen yam tsis muaj lub txim sab nraud; Monel 400 tus nqi nyob twj ywm siab nyob rau hauv cov tswv yim pressures, lub ntsiab lus nws zam qhov kub thiab txias compression cua sov zoo tshaj hlau los yog titanium.

Khoom siv	Autoignition tus cwj pwm hauv oxygen (tus neeg sawv cev)	Kev cuam tshuam
Titanium	Ignites ntawm qhov kub tsis tshua muaj; siab-sensitive	Tsis txhob kub qhov chaw
Cov pa roj carbon steel	Nruab nrab autoignition kub; poob nrog siab	Limit nto temp / tshaj tawm
Stainless hlau 316	Siab dua hlau; siab-sensitive	Dav siv tau
Monel 400	High autoignition kub, tsawg rhiab heev	Txaus siab rau qhov kub / siab - siab oxygen

Cov kub autoignition qhov tseeb yog siab-nyob thiab luam tawm hauv oxygen-cov ntaub ntawv sib raug zoo; lawv yog cov kev ntsuam xyuas qhov tseem ceeb, tsis yog tsim txwv. Rau kev tsim qauv kawg, siv G124 cov ntaub ntawv rau qhov tseeb oxygen siab thiab siv tau kev huv.

Qhov hluav taws kub thiab hluav taws kub hnyiab tau nce siab nrog oxygen siab thiab purity - yog li txawm hais tias Monel 400 tsis tshua muaj - kev pheej hmoo, ntawm qhov kub siab nws tseem xav tau kev huv huv, tswj kev khiav ceev, thiab kev cais tawm; Ib qho kev ua tau zoo tshaj plaws yog tias siab dua li 200-300 psig (1.4-2.1 MPa) oxygen, kev tu nruj thiab kev txwv nrawm dhau los ua qhov yuav tsum tau ua tsis hais txog cov hlau.

Siab:Kev siab dua O2 ib feem siab txo qis lub zog hluav taws xob thiab nce tus nqi hlawv rau tag nrho cov hlau.

Purity:Cov pa ntshiab (kev kho mob / kev lag luam) oxygen hnyav dua li huab cua lossis oxygen -enriched cua.

Ceev:Cov dej ntws nrawm nrawm nrawm cov khoom uas tuaj yeem cuam tshuam nrog cov phab ntsa lossis lub valve.

Txoj cai:Txawm Monel 400 ua raws tib txoj cai: huv + qeeb + particle-dawb raws li siab nce.

Clean Monel 400 oxygen Cheebtsam rau ASTM G93 / CGA G-4.1: degrease, ntxuav, yaug, qhuav, thiab pob hauv cov ntawv pov thawj-cov hnab huv, tom qab ntawd txheeb xyuas nrog cov ntaub so lossis cov kuab tshuaj rho tawm rau NVR thiab roj / roj ua ntej kev teeb tsa.

Degrease:Tshem tawm cov roj / roj ntau nrog cov kuab tshuaj pom zoo (halogen{0}}dawb, qis- residue).

Ntxuav:Ntxuav nrog dej huv / tshuaj ntxuav tes, zam cov tshuaj chloride- muaj cov tshuaj ntawm Monel.

Yaug / qhuav:Thaum kawg yaug nrog lim (particle-dawb) dej los yog hnyav; qhuav nrog huv si, roj - cua dawb.

Tshawb xyuas:Soj ntsuam los yog cov kuab tshuaj-extraction tsom xam rau NVR thiab hydrocarbon residue.

Tiv thaiv:Khaws thiab xa khoom hauv lub hnab ntim khoom ntim, sau 'oxygen- huv' lub hnab kom tiv thaiv kev sib kis.

Tshaj li cov khoom siv thiab kev tu, kev nyab xeeb Monel 400 oxygen tshuab siv cov bores du, tsis muaj ob txhais ceg tuag los yog ntxiab, tswj kev khiav ceev, tsis yog -sparking seat, thiab particle filtration - design, tsis yog alloy, tiv thaiv ignition.

Tsim yam	Oxygen-kev nyab xeeb
Nto tiav	Smooth, polished bores txo particle capture thiab hotspots
Tuag ceg / ntxiab	Tshem tawm qhov twg ua tau kom tsis txhob muaj particle thiab residue buildup
Flow ceev	Txwv rau cov lej / cov lus qhia qhov tseem ceeb (siab-nyob ntawm) kom tsis txhob muaj feem cuam tshuam
Rooj / foob	Siv tsis yog-tshuaj hlau- rau- hlau lossis rooj zaum sib xws; zam hydrocarbon elastomers
Lim	Nruab particle lim dej ntws ntawm cov khoom tseem ceeb
Kev sib koom tes tsim	Siv cov gasket kom raug; zam ntim ntim thiab galling

Cov ntaub ntawv tswj hwm yog ASTM G94 (cov ntawv qhia kev sib raug zoo), ASTM G93 / CGA G-4.1 (kev ntxuav), ASTM G124 / G125 (kev ntsuas hluav taws xob / hlawv), thiab EIGA / CGA cov txheej txheem oxygen-system; cov khoom nws tus kheej yog them los ntawm ASTM B165 / B164 rau Monel 400 cov ntaub ntawv khoom.

Txheem / lub cev	Scope
ASTM G 94	Phau ntawv qhia rau oxygen -kev ntsuas kev sib raug zoo (xaiv cov kev xeem)
ASTM G 93	Kev tu cov txheej txheem thiab qib kev huv ntawm cov khoom siv oxygen
CGA G-4.1	Kev tu cov cuab yeej siv rau kev pabcuam oxygen (tus qauv kev lag luam)
ASTM G124	Autoignition kub hauv gaseous oxygen
ASTM G125	Cov khoom siv hluav taws kub txwv / hlawv tus nqi hauv gaseous oxygen
EIGA / CGA cov lus qhia	Oxygen system tsim thiab kev nyab xeeb
ASTM B165 / B164 ASTM	Monel 400 seamless yeeb nkab / pas nrig thiab bar

Yog lawm. Monel 400 yog ib qho ntawm cov qauv hlau uas nyiam tshaj plaws rau cov pa oxygen vim nws tiv thaiv hluav taws kub thiab muaj qhov qis heev, tus kheej - tua tus nqi hluav taws xob; kev nyab xeeb tseem yuav tsum tau ua kom huv si huv si thiab siv tau zoo tsim.

Yuav ua li cas huv si rau Monel 400 oxygen qhov chaw?

Ntxuav rau ASTM G93 / CGA G-4.1: tsis muaj roj thiab roj (feem ntau<= 350 mg/m2), with low nonvolatile residue (about <= 100 mg/ft2) and minimal particulates; verify by wipe or solvent-extraction test.

ASTM G94 Kev ntsuas kub li cas?

G94 yog ib qho kev qhia uas xaiv qhov kev xeem zoo; qhov kev ntsuas qhov kub hnyiab yog feem ntau ASTM G125, uas ua rau pom cov qauv hauv cov pa oxygen siab thiab ntsuas seb nws hlawv sai npaum li cas - Monel 400 qhia qis lossis tsis muaj kev nthuav tawm.

Monel 400 puas tuaj yeem hlawv hauv oxygen?

Raws li txoj cai, txhua yam hlau tuaj yeem hlawv hauv oxygen nyob rau hauv cov xwm txheej hnyav; Monel 400 muaj qhov ntsuas kub kub thiab nplaim taws tsawg heev - kev nthuav tawm tus nqi, yog li nws muaj kev nyab xeeb dua li titanium lossis carbon hlau, tab sis nws tseem xav tau kev pabcuam huv, tswj xyuas.

Lub siab cuam tshuam li cas Monel 400 hauv oxygen?

Kev puas tsuaj nce nrog oxygen siab thiab purity; saum toj no hais txog 200-300 psig (1.4-2.1 MPa) kev tu kom huv si thiab cov kev txwv ntws nrawm yog qhov yuav tsum tau ua rau tag nrho cov alloys, suav nrog Monel 400.

Dab tsi muab tub lim yog siv yog Monel 400 oxygen yeeb nkab yog welded?

Nickel- tooj liab muab tub lim ERNiCu-7 / ENiCu-7; cov weld yuav tsum tau muab ntxuav kom huv rau qib oxygen, vim tias qhov sib tsoo thiab cov kab mob sib kis yog qhov phom sij.