High simba dema gasket durability? 

Paunonzwa simba guru dema gasket, chii chinouya mupfungwa? Vazhinji vanobva vangofunga nezveruvara - iyo matte kana dzimwe nguva inopenya zvishoma - uye vanoienzanisa nekuita kwepamusoro. Asi ndiwo musungo wekutanga. Ruvara ingori kurapwa kwepamusoro, kazhinji phosphate kana oxide coating, dzimwe nguva elastomeric coating yezvisimbiso zvakati. Mubvunzo wekusimba chaiwo hausi wemuvara wakasimudza; zviri zvekuti simba rakakwirira core material, yakasanganiswa neicho pamusoro, inogona kumirisana nenharaunda yayakandwa mairi. Ndakaona mapurojekiti akawandisa apo timu yakatsanangudza gasket dema ye-high-pressure flange, yakatsvedzerwa nechitarisiko chakasimba, kungotarisana nekutadza nguva isati yakwana nekuti ivo vakatarisa pakunakisa kwete kurongedza-up uye mamiriro ebasa.

The Core Seri Kweruvara

Ngatikurukure zvakare. Simba repamusoro rinowanzo reva iyo metallic core. Isu tinowanzo kutaura nezve chitubu simbi (se301/304/316 isina tsvina), kabhoni simbi, kana dzimwe nguva mhangura-nickel alloys. Iyo yekusviba maitiro, senge zinc phosphate yekunamira pacarbon simbi, inonyanya kupa kusakara uye kukwenya kwepasi kuti ubate zviri nani. Izvo hazvishandure zvemashiripiti zvinhu zvakaderera-giredhi kuita yepamusoro-inoshanda. Simba rinobva pakutsamwa kwesimbi uye ukobvu. Kutarisisa kwakajairwa kutsanangura ukobvu pasina kufunga nezvekugoverwa kwemutoro. Iyo 1.5mm gobvu, yakasviba 304SS gasket inogona kutarisa chikamu, asi pasi pemutoro wakakwira bhaudhi mune isina kuenzana flange, inogona kubereka kana kukwenya, ichirasikirwa nekusimbisa kwayo simba. Iyo yekupfeka nhema inogona kunge ichiri yakasimba, ichipa pfungwa yenhema yekuchengeteka nepo chisimbiso chatokundikana.

Ndinoyeuka imwe nyaya pane heat exchanger retrofit. Mutengi akasimbirira pane dema oxide-yakavharwa kabhoni simbi spiral ronda gasket kune yakanyanyisa kupisa tambo, ichitaura nezve yakapfuura yakabudirira kushandiswa mumutsetse wemvura. Tembiricha yekuchovha bhasikoro uye makemikari condensate mumhepo sevhisi yakarwisa kabhoni simbi yepakati pasi pejasi. Iyo yekupfekedza pachayo yakasimudza, asi takawana kushushikana kwecorrosion kuchitsemuka mumarata mushure memwedzi misere chete. Kusimba kwenzvimbo nhema yaive herring tsvuku yakazara. Isu takachinjira kune graphite-yakazadzwa, dema-yakavharwa 316L Stainless spiral ronda, iro rakarigadzirisa. Tinodzidzei? Iyo nharaunda - tembiricha, midhiya, pH, kumanikidza bhasikoro - inoraira iyo yakakosha zvinhu. Ruvara rwunoitika.

Imwe nuance ndeyekupfeka kwayo kutendeseka. Haasi ose mablack coatings akaenzana. Iyo yakachipa, yakaonda phosphate coating inogona kupera panguva yekuiswa kana kubva kudiki flange kufamba, ichifumura simbi isina kuita ngura. Iyo yakanyanya kusimba dema elastomer coating, senge fluoroelastomer, inowedzera makemikari kuramba asi inogona kuve tembiricha-yakaganhurirwa. Iwe unofanirwa kuziva zvauri kutenga. Ini ndinowanzo kubvunza vatengesi veiyo yekushongedza spec sheet - ndeye ASTM A380 yetsvina? Ndiyo proprietary polymer? Kana vasingakwanise kuzvipa, iwo mureza mutsvuku.

Pressure, Tembiricha, uye Kusvina

Kugara pasi pemutoro ndiko uko dzidziso inosangana neguyo. A Gasket haisi chikamu chekungoita; chinhu chakagadzirwa chinofanira kuyerera pasi pemutoro webhaudhi kuzadza flange kusakwana, wozochengeta elastic kupora kuchengetedza chisimbiso sezvo sisitimu inopisa uye kumanikidza kuchinjika. Iyo yakasviba yakasviba inokanganisa friction coefficient. Kukweshera kwepamusoro (kunopihwa nemamwe mabhandi matema) kunogona kuve kwakanaka kurwisa kuvhuvhuta asi kungangoda yakakwira bhaudhi torque kuti iwane kudzvanywa kwekutanga. Kana iyo torque isina kugadziridzwa, unogona kudzvanya-compress, zvichitungamira mukudonha kubva pazuva rekutanga.

Takamhanyira mune izvi pane compressor discharge line. Vachishandisa mutsva wemutengesi dema-yakavharwa simbi jekete gasket, mafita akashandisa iwo akajairika torque kukosha. Yekutanga bvunzo yehydro yakapfuura, asi mukushanda, nekuchovha bhasikoro, takava nekudonha kunoramba kuripo. Pakuparara, iyo gasket yakaratidza kusakwana kwetsoka - iyo yekupfeka yakanga isati yatamisa zvizere kune flange kumeso, zvichiratidza kuti haina kumbobvira yakatsikirirwa. Coating yacho yaive yakakora uye yaibatirira kupfuura yemutengesi wekare. Taifanira kurovera torque neinenge 15% yehukuru hwezita. Icho chidimbu chidiki, asi chakauraya icho durability yekuiswa ikoko kusvika tazvinzwisisa.

Tembiricha ndiyo imwe mhondi. Iyo yakanaka yeblack coating pane yakajairwa kabhoni simbi gasket inogona kunge yakanaka kusvika 500 ° F, asi pamusoro pazvo, inogona kudzikisira, kupisa, kana sinter. Ndakaona machira matema achishanduka kuita dota rehupfu mukupisa-kupisa, achisiya musimboti wesimbi pachena. Kune masevhisi ekupisa kwepamusoro, uri kutarisa pendi dzemhando yepamusoro-tembiricha kana, kazhinji, kubvuma kuti jasi rinopisa uye uchivimba nekupisa kwekushisa kweiyo oxidation yesimbi yepakati pachayo, sekushandisa 321SS kana Inconel. Iyo dema mune idzi kesi kazhinji inongori yekutanga kuzivikanwa uye kudzivirira ngura mukuchengetedza, kwete ye-in-service performance.

Chaiyo-Nyika Kukundikana uye Zvavanodzidzisa

Hapana chinodzidzisa sokukundikana. Ndinoyeuka batch yeblack-oxide yakavharwa flat ring gaskets yemakemikari akawanda-wanda. Izvo zvinhu zvaive zvechokwadi (316SS), iyo yekumanikidza chiyero yaive yakanaka. Vakakundikana mukati memavhiki nekuisa ngura pasi pekupfeka. Chikonzero chikuru? Chlorides muchikamu chekugadzirisa. Iyo dema oxide inonamira pane isina tsvina, nepo yakanaka kune yakajairika corrosion kuramba, dzimwe nguva inogona kugadzira mutswe mamiriro kana isina kunyatso shandiswa. MaChlorides akavharirwa mumadiki-diki ejasi akatungamira kune gomba uye kukorokoza kwetsvina pasi. Kupfeka kwacho kwakakonzera kukundikana. Isu takachinjira kubani, kunyura uye kupfuudza 316SS gasket isina kupfeka, uye dambudziko rakanyangarika. Dzimwe nguva, kupedzisa kwakasimba hakuna kupera zvachose.

Imwe yemhando yepamusoro ndeye galvanic corrosion. A black-coated carbon steel gasket inoshandiswa pakati pemaflange maviri esimbi isina tsvina. Iyo yekupfekedza inokweshwa panguva yekuiswa pamabolt maburi kana kumacheto. Iye zvino une anode diki (kabhoni simbi) inobata hombe cathode (stainless), munzvimbo inoitisa. Iyo kabhoni simbi inoora nekukurumidza, ichidya kure chikamu chinotakura gasket. Iyo nhema yekupfeka inotaridzika zvakanaka pamusoro pe90% yepasi, asi iyo gasket inokanganiswa pamipendero yakaoma. Ichi ndicho chikonzero kuenderana kwezvinhu iri danho rekutanga risingagone kutaurirana, rakakosha zvakanyanya kupfuura ruvara rwepamusoro.

Izvi zviitiko zvinonditungamira kuti ndive nekukahadzika zvakanyanya kune chero kataroji inongonyora dema gasket sechinhu chakakosha. Iwo chaiwo specs - ASME B16.20, B16.21, zvinhu certs (senge kubva kumugadziri ane mukurumbira senge Handan Zitai Fastener Kugadzira Co, Ltd., yakavakirwa muChina's hombe fastener yekugadzira hub ine yakasimba logistical network), kudzvanywa-tembiricha ratings, uye coating yakatarwa - ndizvo zvine basa. Webhusaiti https://www.zitafornasteers.com vanogona kunyora zvigadzirwa zvavo, asi nhaurirano chaiyo inotanga kana iwe uchikumbira mishumo yebvunzo kumashure kweiyo dema dema listings.

Kuiswa - Iyo Nguva Yechokwadi

Durability inogadzirwa zvakare panguva yekuisa. A black-coated gasket inogona kunyanya kubatwa nekugadzirisa kukanganisa. Kuidonhedza pauriri hwekongiri kunogona kupfapfaidza coating. Kushandisa waya bhurashi kuchenesa yakare flange uye wozororera iyo itsva gasket pairi inogona kupinza zvidimbu zvinoputika mukati meiyo yakapfava. Ndinogara ndichisimbirira pamaoko akachena, magirovhosi uye nzvimbo yakachena yekutandarira. Iyo yekupfekedza ndiyo yekutanga mutsara wekudzivirira; kuityora panguva yekuisa kwakafanana nekupenda fence mushure mekunge watsemura huni.

Lubrication ndiyo imwe pfungwa. Unofanira kuzora gasket rakavharwa neblack? Kazhinji, kwete. Iyo yekuputira inowanzogadzirirwa kune chaiyo friction. Kuwedzera lubricant isingaenderane kunogona kuputsa coating kana kugadzira nzvimbo inotsvedza inosimudzira gasket blow-out pasi pekumanikidzwa. Zviso zveflange zvinofanirwa kuve zvakachena uye zvakaoma kunze kwekunge mugadziri we gasket achinyatso kurudzira anti-kubata (kazhinji chete kune mamwe marudzi egraphite kana PTFE). Iyi ndiyo imwe nzvimbo uko kufungidzira ese matema gaskets akafanana anotungamira kune dambudziko.

Kupupurira kudzvanywa kwekutanga kuri kutaura. Iyo yakanaka, yakasimba gasket ichagara uye kubata. Dzimwe nguva, nerudzi rutsva, unogona kuona kuchema kushoma kunobva kwavhara sekuenderana nekupfeka - izvo zvinowanzoita zvakanaka. Asi kudonha kunoramba kuripo kunoreva kuti chimwe chinhu chakashata: zvinhu zvisirizvo, kusakwana kwebhaudhi mutoro, kukuvara kwejasi, kana flange face issues. Iwe haugone kungoramba uchidonhedza pasi; unofanira kuongorora.

Saka, Kugara Kunomborevei Chaizvo?

Pakupedzisira, kune a Yakakwirira Simba dema gasket, kusimba kunoreva kuti inochengetedza basa rayo rekuisa chisimbiso kune rakagadzirirwa hupenyu hwesevhisi pasi pemamiriro akatarwa. Iyo yakasviba yakasviba chikamu cheiyo, asi imwe chete. Basa rayo nderekudzivirira panguva yekuchengetedza uye kubata, kupa kuwirirana kunoenderana, uye kupa kumwe kupikisa kwekutanga kwekuora. Iyo inorema kusimudza inoitwa neiyo yakakosha simbi yegoho simba, inokambaira kuramba, uye kuenderana.

Kana ndichiongorora, ndinoityora mupfungwa: 1) Core zvinhu zvekemikari uye nharaunda inopisa. 2) Dhizaini (yakadzika, spiral ronda, jekete) yekumanikidza uye flange mhando. 3) Coating mhando yekubata uye yekutanga chisimbiso. 4) Kuisa nzira. Kushaya chero ipi zvayo kunokanganisa hurongwa hwese. Gasket kubva kumugadziri ane hunyanzvi munzvimbo yakavakirwa maindasitiri, senge Yongnian District uko Handan Zitai Fastener inoshanda, kazhinji ine mukana wekugadzirwa kwakabatanidzwa kubva pawaya / stock kusvika kune yapera chigadzirwa, izvo zvinogona kureva kuenderana kuri nani mune iyo yakakosha zvinhu - iyo inonyanya kukosha chikamu.

Pakupedzisira, usanyengedzwa nemuvara. Taura zvinodikanwa zvekushanda kutanga, wozoona kuti ndezvipi kurapwa kwepamusoro, kana zviripo, zvinokwana. Iyo yakanyanya kusimba gasket ndiyo yaunokanganwa nezvayo mushure mekuiswa nekuti inongoshanda, ingave dema, sirivheri, kana simbi isina kujeka. Rudzi nderekutiitira nyore mudura, kwete remuchina. Muchina wacho unongotarisira chisimbiso chete.