Cov Khoom Siv Yeeb Nkab Uas Muaj Xov: Hom, Cov Qauv thiab Cov Ntawv Thov Feem Ntau

Kev Taw Qhia

Cov khoom siv yeeb nkab uas muaj xov yog ib txoj hauv kev siv tau zoo los koom nrog cov kav dej me me yam tsis tas yuav vuam, ua rau lawv siv ntau hauv cov khoom siv hluav taws xob, cov cuab yeej siv, thiab cov kev pabcuam hauv kev lag luam dav dav. Txawm li cas los xij, lawv qhov kev ua tau zoo nyob ntawm kev xaiv hom khoom siv, cov xov, cov khoom siv, thiab qib siab rau txoj haujlwm. Tsab xov xwm no piav qhia txog cov pawg tseem ceeb ntawm cov khoom siv xov, piav qhia txog cov qauv uas tswj hwm qhov ntev thiab kev sib khi, thiab qhia qhov twg cov khoom no feem ntau siv. Thaum kawg, cov nyeem ntawv yuav muaj lub hauv paus meej rau kev sib piv cov kev xaiv, zam kev ua yuam kev ntawm cov lus qhia, thiab nkag siab thaum twg cov kev sib txuas xov tsim nyog piv rau thaum lwm txoj kev koom ua ke yog qhov kev xaiv zoo dua.

Vim li cas cov yeeb nkab fittings tseem ceeb

Cov khoom siv yeeb nkab uas muaj xov yog ib txoj kev qub tshaj plaws thiab txhim khu kev qha tshaj plaws rau kev sib dhos cov kav dej yam tsis tas yuav tsum muaj kev sib txuas hlau. Los ntawm kev siv cov xov sab hauv (poj niam) thiab sab nraud (txiv neej) uas tau ua kom raug, cov khoom no pab txhawb kev sib txuas ruaj ntseg, nruj nreem thoob plaws ntau qhov chaw ua lag luam. Lawv feem ntau siv rau hauv cov kav dej me me, feem ntau txwv rau cov kav dej me me ntawm 2 nti (DN50) thiab me dua. Tshaj li qhov txwv 2-nti no, lub zog torque uas xav tau los sib dhos thiab kaw cov pob qij txha kom zoo yuav tsis yooj yim sua, thiab lwm txoj hauv kev xws li flanging lossis welding yuav tsum tau ua.

Qhov tseem ceeb ntawm kev ua neej nyob mus ib txhiscov khoom siv threadedlos ntawm lawv qhov sib npaug ntawm lub zog kho tshuab, kev hloov pauv tau yooj yim, thiab yooj yim sib dhos. Txawm hais tias cov kab tshuaj lom neeg siab lossis muaj kev phom sij heev feem ntau yuav tsum tau siv cov khoom siv vuam tag nrho, cov xov sib txuas tseem yog tus qauv rau cov kab hluav taws xob, cov cuab yeej siv, thiab cov txheej txheem theem ob uas qhov siab ua haujlwm feem ntau tseem nyob hauv qab 150 psi rau cov ntawv thov tus qauv, lossis txog li 6,000 psi thaum siv cov khoom siv forged hnyav tshwj xeeb.

Qhov zoo ntawm kev teeb tsa thiab kev saib xyuas

Qhov zoo tshaj plaws ntawm kev sib txuas threaded yog nyob rau hauv lawvkev ua haujlwm zoo ntawm kev teeb tsaTsis zoo li kev vuam, kev siv xov tsis tas yuav muaj daim ntawv tso cai ua haujlwm kub, qhov cua tshwj xeeb, lossis kev ua haujlwm hlau tshwj xeeb heev. Qhov no txhais tau tias txo lub sijhawm teeb tsa thiab cov nqi zog ua haujlwm, uas tuaj yeem qis dua 30% txog 50% piv rau cov khoom sib dhos sib piv. Ntxiv mus, cov kab ke threaded tsis muaj kev pheej hmoo hluav taws thaum lub sijhawm teeb tsa, ua rau lawv zoo tagnrho rau kev kho dua tshiab lossis kev nthuav dav hauv cov chaw ua haujlwm, qhov chaw txaus ntshai uas kev nres kev tsim khoom rau kev ua haujlwm kub tsis muaj txiaj ntsig zoo.

Kev kho thiab kev hloov kho lub kaw lus kuj tau txais txiaj ntsig zoo los ntawm cov qauv threaded. Thaum lub kav dej xav tau kev hloov pauv, kev tshuaj xyuas, lossis kev hloov pauv khoom, cov khoom siv threaded - tshwj xeeb tshaj yog cov unions - tso cai rau cov kws kho tshuab kom rhuav tshem cov ntu tshwj xeeb sai sai yam tsis txiav lub kav dej. Qhov modularity no txo ​​qhov downtime thiab tso cai rau kev rov qab thiab rov siv dua ntawm cov li qub kim thiab cov cuab yeej siv.

Cov ntawv thov kev lag luam feem ntau

Cov ntawv thov kev lag luam rau cov khoom siv threaded muaj ntau heev, txawm hais tias lawv feem ntau yog tsom mus rau cov khoom siv hluav taws xob thiab cov khoom siv pabcuam es tsis yog cov kab ua haujlwm txaus ntshai tseem ceeb. Kev faib dej txias, cov cuab yeej cua ntsuas, thiab cov tshuab pa dej qis qis vam khom ntau rau cov khoom no. Hauv kev tiv thaiv hluav taws rau kev lag luam thiab kev lag luam, cov khoom siv hlau malleable threaded yog tus qauv thoob plaws rau cov kab ceg ntawm cov tshuab sprinkler.

Tsis tas li ntawd xwb, cov roj thiab cov roj av siv cov khoom siv hnyav forged threaded fittings rau cov cuab yeej siv hauv qhov dej, cov skids txhaj tshuaj, thiab cov kab tswj hydraulic. Hauv cov chaw no, cov kev sib txuas threaded muab cov qauv tsim nyog los tiv taus kev ntxhov siab ua haujlwm tseem ceeb thaum tso cai rau kev sib dhos sai sai hauv thaj chaw deb lossis ntug dej hiav txwv.

Hom, xov, thiab cov ntaub ntawv

Qhov ua tau ntau yam ntawm cov kav dej uas muaj xov nyob ntawm qhov tseeb ntawm cov qauv sib phim, cov qauv xov, thiab cov khoom siv hlau. Kev xaiv qhov sib xyaw ua ke kom raug ua kom cov kav dej tuaj yeem hloov pauv qhov kev taw qhia tsim nyog, kev sib txuas ceg, thiab cov kev xav tau siab yam tsis muaj kev cuam tshuam rau cov dej ntws lossis kev ua haujlwm ntawm lub tshuab. Cov kws ua haujlwm yuav tsum taug kev ntau yam kev teeb tsa, cov chav kawm siab uas suav nrog Chav Kawm 150 txog Chav Kawm 6000, thiab ntau yam qauv xov.

Cov hom kev sib txuas uas siv ntau

Cov kav dej sib txuas xav tau ntau yam kev hloov pauv thiab volumetric, ua tiav los ntawm cov qauv geometries tshwj xeeb. Lub luj tshib (feem ntau yog 90 ° thiab 45 °) pab txhawb kev hloov pauv, thaum tees thiab crosses tso cai rau kev faib dej ntws thiab kev sib tov. Cov couplings txuas cov yeeb nkab linear, reducers hloov pauv ntawm cov yeeb nkab sib txawv, thiab lub hau lossis plugs kaw cov kawg ntawm lub davhlau ya nyob twg. Cov unions yog cov khoom tseem ceeb uas tso cai rau kev txiav cov yeeb nkab yam tsis tau tig cov yeeb nkab sib ze.

Qhov sib txawv ntawm NPT, BSPT, thiab BSPP

Qhov kev sib txuas ntawm cov xov sib txuas yog nyob ntawm seb cov xov siv li cas, nrog rau NPT (National Pipe Taper), BSPT (British Standard Pipe Taper), thiab BSPP (British Standard Pipe Parallel) yog cov qauv thoob ntiaj teb. Cov xov NPT, tus qauv hauv North America, muaj lub kaum sab xis ntawm cov xov 60-degree thiab cov ncov thiab cov hav tiaj tiaj. Tus nqi taper yog 1 nti hauv 16 nti, tsim kom muaj kev sib haum xeeb uas kaw los ntawm kev hloov pauv ntawm cov hlau mus rau hlau ua ke nrog cov khoom siv foob xov.

Ntawm qhov tod tes, BSPT xov siv lub kaum sab xis 55-degree nrog cov ncov thiab hav puag ncig. Thaum BSPT kuj tseem siv lub geometry tapered rau kev sib khi, nws lub kaum sab xis thiab lub suab sib txawv ua rau nws tsis sib xws nrog NPT; kev yuam ob qho ua ke lav qhov xau thiab kev puas tsuaj ntawm xov. BSPP xov, tsis muaj taper, tsis tsim lub foob los ntawm kev cuam tshuam ntawm xov; lawv xav tau elastomeric O-ring lossis lub washer foob sib txuas kom tiv thaiv cov kua dej tawm, ua rau lawv tsim nyog rau cov kab ke uas xav tau kev sib cais ntau zaus.

Cov kev xaiv ntawm cov khoom siv thiab kev ntsuas siab

Kev xaiv cov khoom siv qhia txog kev tiv taus xeb thiab lub siab-kub ntawm lub fitting. Hlau Malleable yog ib qho uas siv rau cov kav dej lag luam uas muaj siab qis, feem ntau yog rated rau Class 150 lossis Class 300 daim ntawv thov. Rau kev ruaj khov hauv kev lag luam, cov hlau carbon forged (piv txwv li, ASTM A105) yog siv, tsim nyob rau hauv Class 2000, 3000, thiab 6000 ratings. Ib qho Class 3000 forged fitting, piv txwv li, yog ib txwm ua ke nrog Schedule 80 yeeb nkab rau cov ntawv thov kev lag luam siab.

Thaum muaj cov khoom siv corrosive lossis qhov kub thiab txias heev, cov hlau austenitic stainless hlau zoo li 304/304L thiab 316/316L raug teev tseg. Cov ntaub ntawv no tiv taus oxidation thiab tshuaj lom neeg thaum tswj lub zog kho tshuab ntawm qhov kub thiab txias siab. Rau cov chaw tshwj xeeb heev, cov hlau txawv teb chaws xws li Monel, Hastelloy, lossis Duplex stainless hlau raug xa mus, txawm hais tias cov no tuaj yeem ua rau cov nqi khoom nce ntxiv los ntawm 5 txog 10 piv rau cov hlau carbon txheem.

Cov Qauv thiab kev ua raws li txoj cai

Vim tias cov khoom siv uas muaj xov tau muab tso rau hauv qhov chaw muaj cua siab uas qhov kev ua tsis tiav tuaj yeem ua rau muaj kev puas tsuaj loj heev rau ib puag ncig, kev puas tsuaj rau khoom vaj khoom tsev, lossis kev raug mob, lawv raug tswj hwm los ntawm cov qauv thoob ntiaj teb nruj. Cov qauv no ua kom muaj kev sib npaug ntawm qhov ntev, kev coj ua hlau kwv yees tau, thiab kev tswj hwm lub siab ntseeg tau txawm tias qhov chaw tsim khoom nyob qhov twg los xij. Kev ua raws li cov qauv no lav tias qhov khoom siv uas tau txais hauv ib cheeb tsam yuav sib txuas nrog cov yeeb nkab uas muaj xov hauv lwm qhov, tswj kev kam rau siab kom nruj li +/- 1 xov tig.

Cov qauv tseem ceeb ntawm ASME, ASTM, ISO, EN thiab MSS

Cov koom haum xws li ASME, ASTM, ISO, thiab EN tswj hwm kev tsim khoom thiab kev qhia tshwj xeeb ntawm cov khoom siv threaded. ASME B16.11 yog tus qauv tseem ceeb rau cov khoom siv forged steel, qhia txog qhov ntev, kev kam rau siab, thiab cov khoom siv uas yuav tsum tau siv rau kev vuam qhov (socket-welding) thiab kev teeb tsa threaded. Lub caij no, cov ntaub ntawv xov lawv tus kheej raug tswj hwm los ntawm ASME B1.20.1 rau NPT thiab ISO 7-1 rau BSPT.

Kev lees paub, kev taug qab, thiab kev sim

Kev ua raws li txoj cai txuas ntxiv mus dhau qhov tseeb ntawm qhov ntev mus rau qhov kev taug qab cov khoom siv thiabkev ruaj ntseg zooCov haujlwm lag luam siab dua yuav tsum muaj Cov Ntawv Qhia Txog Kev Ntsuas Khoom Siv (MTRs) ua raws li EN 10204 Hom 3.1, uas lav tias cov khoom siv tshuaj lom neeg thiab cov khoom siv kho tshuab tau raug lees paub los ntawm lub chaw tsim khoom lub chaw kuaj xyuas ywj pheej. Qhov kev taug qab no ua kom ntseeg tau tias cov pa roj carbon sib npaug tseem nyob hauv qhov txwv tsis pub siv tau rau kev vuam (yog tias siv tau) thiab kev ua haujlwm ntawm cov qauv.

Cov txheej txheem kuaj feem ntau suav nrog Kev Txheeb Xyuas Cov Khoom Siv Zoo (PMI) los txheeb xyuas cov khoom sib xyaw, tshwj xeeb tshaj yog qhov tseem ceeb rau 316 stainless hlau kom ntseeg tau tias muaj cov ntsiab lus molybdenum txaus (feem ntau 2.0% txog 3.0%) rau kev tiv thaiv pitting. Ntxiv mus, thaum cov khoom siv lawv tus kheej tsis tau kuaj hydrostatic los ntawm tus neeg tsim khoom, lawv tau tsim los kom tiv taus qhov kev kuaj hydrostatic ntawm 1.5 npaug ntawm qhov siab tshaj plaws tsim yam tsis muaj kev tso tawm lossis xau.

Yuav ua li cas los ntsuam xyuas thiab nrhiav cov khoom siv

Kev yuav cov khoom siv yeeb nkab uas muaj xov yuav tsum muaj txoj hauv kev zoo uas sib npaug cov lus qhia txog kev siv tshuab nrog rau qhov tseeb ntawm cov khoom siv. Cov neeg yuav khoom thiab cov engineers yuav tsum tsis txhob tsuas yog soj ntsuam cov kev xav tau tam sim ntawd xwb tab sis kuj tseem yuav tsum soj ntsuam qhov kev ntseeg siab mus sij hawm ntev ntawm cov khoom siv. Kev xam tsis raug hauv kev soj ntsuam qhov zoo ntawm cov khoom siv lossis kev tsis paub txog lub sijhawm ua tiav tuaj yeem ua rau cov haujlwm qeeb lossis kev ua tsis tiav ntawm lub kaw lus ua ntej.

Cov yam ntxwv ntawm kev siv thiab kev xaiv

Qhov tseem ceeb tshaj plaws hauv kev nrhiav khoom yog qhov sib phim meej ntawm qhov sib phim thiab daim ntawv thov ua haujlwm. Cov kev txwv kub yog qhov tseem ceeb; piv txwv li, thaum cov khoom siv carbon steel tuaj yeem tiv taus qhov kub siab, daim kab xev PTFE xov sealant feem ntau siv nrog nws feem ntau degrades saum 260 ° C (500 ° F). Hauv cov xwm txheej zoo li no, lwm cov sealants kub siab lossis cov teeb tsa xov sib luag tshwj xeeb nrog cov sealants hlau yuav tsum tau soj ntsuam.

Kev co yog lwm yam tseem ceeb rau kev xaiv. Cov pob qij txha uas muaj cov xov tapered feem ntau yuav raug thim rov qab thaum muaj kev co loj heev. Yog tias lub kaw lus raug kev co tas li los ntawm cov twj tso kua mis lossis cov compressors, cov neeg yuav khoom yuav tsum soj ntsuam seb cov khoom siv sib txuas puas tsim nyog, lossis yog tias cov khoom sib txuas uas xauv xov thiab cov khoom siv Class 6000 hnyav dua yog qhov tsim nyog los muab qhov hnyav thiab qhov tob ntawm kev sib txuas xov kom tiv taus kev co.

Cov chaw kuaj xyuas zoo

Yuav tsum muaj cov chaw kuaj xyuas zoo thaum lub sijhawm ntsuam xyuas. Cov neeg yuav khoom yuav tsum tshuaj xyuas cov neeg muag khoom kom paub tseeb tias cov xov ntsuas tau zoo; cov xov uas txiav tob dhau lossis tsis tob dhau yuav ua tsis tau raws li qhov tsim nyog, ua rau muaj qhov xau ntawm cov kauv. Kev tshuaj xyuas pom yuav tsum lees paub tias tsis muaj burrs, kua muag, lossis cov cim chatter ntawm cov xov, uas qhia txog kev ua haujlwm tsis zoo thiab cov nplaim sealing tsis zoo.

Phab ntsa tuab yog lwm qhov chaw kuaj xyuas tseem ceeb. Ib qho khoom siv Class 3000 yuav tsum muaj phab ntsa tuab txaus kom phim lossis tshaj qhov siab tawg ntawm Schedule 80 yeeb nkab. Cov chaw tsim khoom tsis zoo yuav txo cov phab ntsa tuab kom txuag tau cov nqi khoom siv raw. Rau cov ntawv thov kev lag luam tseem ceeb,cov pab pawg yuav khoomyuav tsum tsom mus rau cov neeg muab khoom uas qhia txog qhov tsis zoo uas qis dua 0.1%, txhawb nqa los ntawm cov txheej txheem tswj hwm zoo ISO 9001.

MOQ, lub sijhawm ua khoom, ntim khoom thiab kev nrhiav khoom

Cov nqe lus xa khoom thiab kev lag luam muaj feem cuam tshuam loj heev rau cov tswv yim nrhiav khoom. Cov hlau carbon txheem thiab 304/316 stainless hlau fittings feem ntau muaj Yam Tsawg Kawg Nkaus Kev Txiav Txim Kom Muaj (MOQs) txij li 500 txog 1,000 daim raucov lus txib ncaj qha los ntawm lub Hoobkas, txawm hais tias cov neeg faib khoom feem ntau muab cov khoom me me ntawm tus nqi siab. Lub sijhawm ua khoom rau cov khoom forged txheem feem ntau yog txij li 4 txog 8 lub lis piam, thaum cov alloys txawv teb chaws xws li Hastelloy tuaj yeem ntev txog 12 lossis 16 lub lis piam vim tsis muaj cov khoom siv raw.

Kev ntim khoom yog ib qho uas feem ntau tsis quav ntsej txog kev nrhiav khoom. Cov khoom siv hlau carbon yooj yim raug oxidation thaum lub sijhawm thauj mus los hauv hiav txwv. Cov neeg yuav khoom yuav tsum qhia meej txog kev kho mob tiv thaiv xeb, xws li cov roj pleev xim me me, thiab xav tau cov ntim khoom xa tawm-xws li cov hnab tiv thaiv xeb vapor (VCI) hauv cov thawv ntoo hnyav-kom ntseeg tau tias cov khoom tuaj txog ntawm qhov chaw tsim kho hauv qhov xwm txheej npaj txhij rau kev teeb tsa.

Cov lus qhia thiab kev yuav khoom

Yuav kom txo tau qhov kev pheej hmoo uas cuam tshuam nrog cov khoom tsis sib xws thiab cov teeb meem ntawm cov khoom xa tuaj, cov koom haum yuav tsum siv cov lus qhia tshwj xeeb thiab cov qauv kev yuav khoom. Los ntawm kev ua kom lub neej ntawm kev yuav khoom raug cai, cov tuam txhab ua kom muaj kev sib xws thoob plaws ntau qhov chaw, txo tag nrho cov nqi ntawm kev muaj, thiab sib phim cov kev cai ntawm lub chaw haujlwm engineering nrog rau qhov tseeb ntawm kev lag luam ntawm pab pawg neeg yuav khoom.

Cov txheej txheem qhia txog cov kauj ruam

Ib qho txheej txheem kev qhia tshwj xeeb uas ruaj khov ua raws li txoj kev qhia meej, ib kauj ruam zuj zus. Kauj ruam thawj zaug txhais cov kua dej, lub zog ua haujlwm, thiab qhov kub siab tshaj plaws (piv txwv li, pa dej ntawm 150 PSI). Kauj ruam thib ob qhia txog qib khoom siv thiab chav kawm siab uas xav tau kom muaj kev nyab xeeb ntawm cov xov ntawd. Kauj ruam thib peb ua kom hom xov txheem (piv txwv li, yuam kom NPT hla lub chaw North American kom tiv thaiv kev sib tshuam nrog BSPT qhov chaw).

Kauj ruam thib plaub suav nrog kev piav qhia txog cov qauv kev ua raws cai thiab cov ntaub ntawv xeem, xws li kev thov kom ua raws li ASME B16.11 thiab EN 10204 3.1 MTRs. Thaum kawg, kauj ruam thib tsib xav tau kev tshuaj xyuas kev siv tshuab uas cov khoom siv tshwj xeeb tau raug lees paub raws li cov yeeb nkab teem sijhawm siv, kom ntseeg tau tias cov khoom siv siab Class 3000 tsis raug txuas nrog cov yeeb nkab Schedule 10 nyias-phab ntsa, uas yuav tsim qhov chaw tsis muaj zog txaus ntshai hauv cov hauv paus xov.

Lub luag haujlwm ntawm kev tsim kho, kev faib khoom, thiab kev yuav khoom

Kev yuav khoom kom zoo yog nyob ntawm kev sib koom tes ntawm cov pab pawg engineering, distribution, thiab purchasing.

Cov Ntsiab Lus Tseem Ceeb

• Cov lus xaus tseem ceeb tshaj plaws thiab cov laj thawj rau cov yeeb nkab threaded
• Cov lus qhia tshwj xeeb, kev ua raws li txoj cai, thiab kev kuaj xyuas kev pheej hmoo uas tsim nyog lees paub ua ntej koj cog lus
• Cov kauj ruam tom ntej thiab cov lus ceeb toom uas cov nyeem ntawv tuaj yeem siv tau tam sim ntawd

Cov Lus Nug Feem Ntau

Cov yeeb nkab loj npaum li cas zoo tshaj plaws rau cov khoom siv yeeb nkab uas muaj xov?

Feem ntau lawv siv rau ntawm cov kab me me txog li 2 ntiv tes (DN50). Yog tias loj tshaj qhov ntawd, qhov sib dhos torque thiab kev pheej hmoo ntawm kev xau yuav nce ntxiv, yog li cov pob qij txha flanged lossis welded feem ntau yog qhov zoo dua.

Cov hom yeeb nkab uas siv xov feem ntau yog dab tsi?

Cov hom uas siv ntau suav nrog lub luj tshib, lub tees, cov couplings, cov reducers, lub hau, cov plugs, cov bushings, thiab cov unions. Txhua tus muaj ib txoj haujlwm tshwj xeeb xws li hloov kev taw qhia, kev ntws ntawm cov kav dej, kev koom ua ke ntawm cov yeeb nkab, lossis kev tso cai rau kev yooj yim rhuav tshem.

Cov xov NPT, BSPT, thiab BSPP sib txawv li cas?

NPT siv cov xov 60° tapered uas feem ntau siv hauv North America. BSPT yog 55° tapered, thaum BSPP yog 55° parallel thiab feem ntau yog kaw nrog lub washer lossis O-ring. Tsis txhob sib xyaw cov qauv.

Cov yeeb nkab fittings threaded feem ntau siv nyob qhov twg?

Lawv feem ntau pom muaj nyob rau hauv dej txias, cua ntsuas, pa dej qis, cov kav dej phwj, thiab cov cuab yeej siv roj av lossis cov kav tswj hydraulic uas kev sib dhos thiab kev saib xyuas sai yog qhov tseem ceeb.

Kuv yuav xaiv cov khoom siv sib txuas zoo li cas rau kuv qhov project?

Xyuas kom tus neeg muag khoom muaj cov qauv xov, qib siab, thiab cov khoom siv uas xav tau, ntxiv rau qhov zoo ntawm kev ua haujlwm. Hauv nbfh-metal.com, saib cov khoom thiab cov peev xwm ntawm lub Hoobkas ua ntej thov cov lus qhia lossis cov lus hais.