Indlela Yokukhetha Ukufakwa Kwepayipi Lensimbi Egayiwe Ngokwejwayelekile

Isingeniso

Ukukhetha izihlanganisi zamapayipi ensimbi agqitshiwe ngokwezinga elijwayelekile kusiza ukuqinisekisa ukuthi yonke indololwane, i-tee, i-coupling, kanye ne-union ihambisana nezidingo zesistimu yamapayipi, ubukhulu, kanye nokumelana nokugqwala. Izindinganiso zichaza izici ezibalulekile njengebanga lezinto ezibonakalayo, ukujiya kodonga, ukunemba kwentambo, isilinganiso sokucindezela, kanye nekhwalithi yokumboza i-zinc, konke okuthinta ukuphepha nokuphila kwenkonzo. Lo mhlahlandlela uchaza ukuthi ungaqhathanisa kanjani izincazelo ezivamile, uqinisekise ukuhambisana, futhi ugweme izihlanganisi ezingalingani noma ezisezingeni eliphansi ezinhlelweni zezimboni, zezentengiselwano, kanye nezinsiza. Ngokuqonda ukuthi indinganiso ngayinye ilawula ini, abathengi kanye nonjiniyela bangenza izinqumo ezinokwethenjelwa kakhulu futhi banciphise izingozi zokufaka, ukugcinwa, kanye nokwehluleka.

Kungani Izindinganiso Zibalulekile Ngezinto Zokufaka Amapayipi Ensimbi Egayiwe

Ukufakwa kwamapayipi ensimbi ahlanganisiwe kusebenza njengezicubu ezibalulekile ezixhumanisayo ezinhlelweni zokuthutha uketshezi kanye negesi, okunikeza amandla aqinile okusebenza kanye nokumelana nokugqwala okuthuthukisiwe. Ukusetshenziswa kwengubo ye-zinc, evame ukufezwa nge-hot-dip galvanizing, kudala isibopho se-metallurgical esivikela insimbi engaphansi ekungcolisweni. Kodwa-ke, ukusebenza kanye nobude besikhathi salezi zingxenye kuncike ngokuphelele ekunamatheleni okuqinile kokusethwe.amazinga okukhiqiza nezinto zokwakha.

Ngaphandle kwemininingwane ejwayelekile elawula ukwakheka kwezinto, ukubekezelelana kobukhulu, kanye nobukhulu be-galvanizing, ubuqotho besistimu abunakuqinisekiswa. Izisekelo zemboni ngokuvamile zidinga ubukhulu obuncane be-zinc coating obungama-micrometer angu-86 (µm) ukuze kuqinisekiswe impilo yesevisi eyanele ezindaweni zezimboni ezidingayo. Ukukhetha izinto zokufaka ngokwezinga elijwayelekile akuyona nje indlela yokuthobela imithetho; kuyindlela eyinhloko yokuqinisekisa ukuziphatha okubikezelwayo kwemishini kumanethiwekhi amapayipi ayinkimbinkimbi.

Ingozi yephrojekthi kanye nokuthembeka kwayo

Ukukhetha izihlanganisi ngokusekelwe ezindinganisweni eziqinile kunciphisa ngqo ingozi yephrojekthi ngokuqinisekisa ukusebenza okuthembekile ngaphansi kokucindezeleka komshini nokushisa. Izihlanganisi ezingajwayelekile zivame ukubonisa ukujiya kodonga okungaguquki, ukugoba kwangaphakathi, noma ukuthungwa okunganele. Ezinhlelweni zokudlidliza okuphezulu noma zokucindezela okuguquguqukayo, lezi ziphazamiso zokukhiqiza zingandisa amathuba okwehluleka okukhulu noma ukuvuza okuncane ngamaphesenti angaphezu kuka-40.

Ezinhlelweni zezentengiselwano nezezimboni ezisebenza ngezingcindezi ezijwayelekile, njenge-150 psi noma i-300 psi, ukusebenzisa izihlanganisi ezihlangabezana ngokusobala nezilinganiso zokushisa kwengcindezi ezibekiwe akunakuxoxiswana ngazo. Izinqubo zokuhlola ezijwayelekile ziqinisekisa ukuthi izihlanganisi zikhiqiza ngokubikezela, zigcina ukuphepha kokusebenza futhi zivimbele isikhathi esibi kakhulu sokungasebenzi kwesikhungo esibangelwa ukulahleka koketshezi okungalindelekile.

Lapho ukukhetha okusekelwe ejwayelekile kubaluleke kakhulu

Ukunamathela ngokuqinile ezindinganisweni kuba yinto ebaluleke kakhulu ezinhlelweni zokuphepha empilweni, ingqalasizinda ebalulekile, kanye nezicelo zezimboni ezinesibopho esikhulu. Isibonelo, izinhlelo zokuvikela umlilo zezentengiselwano ezilawulwa yi-NFPA 13 zidinga ukuthi zonke izinto zokufaka i-galvanized zibe nohlu lwe-UL kanye nokuvunyelwa kwe-FM, okudinga ukuhlolwa okuqinile kwe-hydrostatic ukuze kumelane nokucindezeleka okuncane okungaphezu kwesilinganiso sokusebenza kwazo esiphindwe kahlanu.

Ngokufanayo, ekusakazweni kwamanzi kamasipala kanye nokucubungula amakhemikhali ngamandla, ukucacisa izinto ezihambisana nezindinganiso kuqinisekisa ukuthi isisindo se-zinc coating sihlangabezana nemingcele edingekayo ukuvimbela ukuwohloka kwesakhiwo ngaphambi kwesikhathi. Kulezi zimo, ukunamathela ezindinganisweni kusiza uhlelo ukufeza umjikelezo wokuphila weminyaka engama-20 kuya kwengama-30 ohlosiwe ngaphandle kokudinga ukushintshwa kwengxenye ngaphambi kwesikhathi.

Izindinganiso Ezibalulekile Zokufakwa Kwepayipi Lensimbi Egayiwe

Isimo somhlaba wonke se-izingxenye zamapayipiilawulwa yizinhlangano eziningana ezinkulu zokulinganisa, ngayinye ichaza izindlela ezithile zezakhiwo zensimbi, ubukhulu, kanye nezinhlobo zentambo. Ukuhamba ngalezi zindinganiso kubalulekile konjiniyela kanye nochwepheshe bokuthenga ukuqinisekisa ukuhlanganiswa okungenamthungo ezinhlelweni ezikhona noma ezisanda kuklanywa.

Ukuqonda umehluko phakathi kwezindinganiso zaseMelika, zaseYurophu, nezamazwe ngamazwe kuvimbela ukungalingani okubizayo ngesikhathi sokufakwa futhi kuqinisekisa ukuthi izinto zokufakelwa ezikhethiwe ze-galvanized zizosebenza ngokuphephile ngaphansi kwemithwalo yokusebenza ehlosiwe.

Ukubuka konke kwe-ASTM, ASME, EN, ISO, kanye ne-BS

Izinhlangano ezahlukene zesifunda zinquma imininingwane yokufakwa kwamapayipi ensimbi agqitshiwe. Izindinganiso ze-ASME kanye ne-ASTM zibusa imakethe yaseNyakatho Melika, kuyilapho amazinga e-EN, ISO, kanye ne-BS evame kakhulu eYurophu nasezimakethe zomhlaba wonke.

Izinto, ubukhulu, kanye nokuhambisana kwentambo

Esinye sezici ezibaluleke kakhulu zokuhambisana nezindinganiso ukuhambisana kwezintambo. Izinhlelo zaseNyakatho Melika zisebenzisa kakhulu izintambo ze-National Pipe Taper (NPT) ezilawulwa yi-ASME B1.20.1, ezine-engeli yentambo engama-degree angu-60. Ngokuphambene nalokho, izinhlelo zaseYurophu nezamazwe ngamazwe zivame ukusebenzisa izintambo ze-British Standard Pipe Taper (BSPT) ezilawulwa yi-ISO 7-1, ezisebenzisa i-engeli yentambo engama-degree angu-55.

Ukuzama ukuhlanganisa i-NPT fitting nepayipi le-BSPT—noma okuphambene nalokho—kuphumela ekuhlanganiseni okungafanele kwentambo. Ngisho noma izingxenye zibonakala sengathi zihlangana ekuqaleni, ama-engeli ahlukene kanye nephimbo kuzovimbela ukuvalwa okufanele, okuholela ekutheni kube nethuba lokuvuza elicishe libe yi-100% ezingcindezini zokusebenza ezingaphezu kwama-50 psi. Izindinganiso zobukhulu nazo zinquma ubukhulu bodonga obuncane ukuqinisekisa ukuthi i-fitting ingakwazi ukuphatha i-torque esetshenziswa ngesikhathi sokufakwa ngaphandle kokuqhekeka.

Indlela yokufanisa amazinga okufaka kanye namapayipi

Ukuze kufezwe uhlelo oluhlangene, indinganiso yokufakwa kwe-galvanized kumele ivumelane nendinganiso yepayipi lensimbi. Isibonelo, uma kusetshenziswa ipayipi lensimbi le-galvanized le-ASTM A53 standard weight (Schedule 40), onjiniyela bavame ukucacisa ukufakwa kwensimbi okuthambile kwe-ASME B16.3 Class 150.

Ngezinhlelo zokusebenza ezisindayo ezisebenzisa ipayipi le-Schedule 80, kudingeka ukufakwa kwe-Class 300 ukuze kugcinwe ubuqotho besilinganiso sokucindezela kwesistimu. Ukuhambisana nalezi zindinganiso kuqinisekisa ukuthi indawo ebuthaka kakhulu kunethiwekhi yamapayipi akuyona i-threaded joint, ngaleyo ndlela kugcinwa umngcele wokucindezela ofanayo kulo lonke uhlelo lokuthutha uketshezi.

Indlela Yokuhlola Ikhwalithi Nokuhambisana Nemithetho

Ukuhlola ikhwalithi kanye nokuhambisana kwezinsimbi zokufakelwa kwensimbi ezihlanganisiwe kudinga indlela ehlelekile yokuqinisekisa izici zomzimba kanye nezakhiwo zensimbi ezibhalwe phansi. Amaqembu okuthenga kumele abheke ngale kokubukeka okungaphandle ukuze aqinisekise ukuthi imikhiqizo iyahlangabezana nezidingo eziqinile zezicelo zawo ezihlosiwe.

Ukuhlolwa kwekhwalithi okuphumelelayo kuhlanganisa ukuhlolwa okubonakalayo, ukuqinisekiswa kobukhulu, kanye nokubuyekezwa kwamadokhumenti ukuqinisekisa ukuthi izinto ezifakiwe zizoletha ukuthembeka kwesikhathi eside ngaphandle kokunqotshwa ukugqwala ngaphambi kwesikhathi noma ukwehluleka kwemishini.

Amamaki ekhwalithi okufanele uwahlole

Izimpawu zekhwalithi ziqala ngobuqotho be-galvanization. I-zinc coating kumele iqhubeke, ifane, futhi ingabi namabala amnyama, izindawo ezingamboziwe, noma i-zinc pooling eningi (amaconsi) angaphazamisa ukuthungwa. Ukuze kufakwe i-hot-dip galvanizing, amazinga ngokuvamile adinga isisindo esincane se-coating esingu-610 g/m² ukuqinisekisa ukuvikelwa kwemvelo okwanele.

Ukunemba kobukhulu kubaluleke kakhulu. Ukubandakanyeka kwentambo kufanele kuqinisekiswe kusetshenziswa ama-plug nama-ring gauge ajwayelekile, kuqinisekiswe ukuthi ukubekezelelana kugcinwa ngaphakathi kwama-+/- 1.5 amajika we-notch ye-gauge eyisisekelo. Ngaphezu kwalokho, ukufakwa kwekhwalithi ephezulu kuhlolwa nge-hydrostatic ngayinye ku-indawo yokukhiqiza, ngokuvamile ngengcindezi yokusebenza ephezulu ephindwe ka-1.5—njengokuhlola ukufakwa okulinganiselwe yi-psi engu-150 ku-psi engu-225—ukuqinisekisa ukuqina kwesakhiwo.

Izimo zesicelo kanye nezidingo zesevisi

Ukuhlolwa kokuhambisana nomthetho kumele kuhambisane nezidingo ezithile zesevisi yesicelo. Izithako zensimbi ezithambile ezigayiwe ngokuvamile zilinganiswa ngesevisi eqhubekayo ngaphakathi kwezinga lokushisa eliphakathi kuka-20°C no-200°C. Ukudlula le mikhawulo yokushisa kungalimaza ubuqotho bomshini wensimbi eyisisekelo noma kusheshise ukuwohloka kwesendlalelo se-zinc.

Ngaphezu kwalokho, uhlobo lwamakhemikhali loketshezi oluthuthwayo lunquma izidingo zekhwalithi. Nakuba izinsimbi ezifakwe nge-galvanized zisebenza kahle emanzini aphuzwayo kanye nezinhlelo zomoya ezicindezelwe, uqweqwe lwazo lwe-zinc lusabela kakhulu emazingeni e-pH angaphansi kuka-6.0 noma ngaphezulu kuka-10.5. Ukuhlola izimo zesevisi kuqinisekisa ukuthi indinganiso ecacisiwe ihambisana nokucindezeleka kwangempela kwamakhemikhali nokushisa okuzobhekana nakho.

Imibhalo edingekayo kanye nemibiko yokuhlolwa

Ukuqinisekiswa okungokoqobo kumele kusekelwe njalo ngamadokhumenti alandelekayo.Abakhiqizi abadumilehlinzeka ngemibiko yokuhlolwa kwemishini (ama-MTR) noma izitifiketi ze-EN 10204 Type 3.1 nazo zonke izigaba zokufakwa. Le mibhalo ilandelela umkhiqizo emuva ekushiseni kwensimbi kwasekuqaleni futhi iqinisekisa ukwakheka kwamakhemikhali kanye nezakhiwo zemishini.

Umbiko wokuhlola ohambisanayo wezinsimbi ezisetshenziswayo ezithambile kufanele uqinisekise ukuthi okuqukethwe kwekhabhoni kuhlala kungaphansi kuka-0.25% kanye nesibabule ngaphansi kuka-0.05%, ukuqinisekisa ukuthi izinto zigcina ukuguquguquka okwanele ukuze zimunce ukushaqeka komshini ngaphandle kokuphuka okuqhekeka. Imibiko yokuhlola engekho noma engaphelele iyisibonakaliso esiyinhloko sokukhiqiza okungaphansi kwesilinganiso futhi kufanele ivimbele umhlinzeki enqubweni yokukhetha.

Izindlela Ezinhle Kakhulu Zokuthola Nokukhetha

Ukuthola izinto zokufaka amapayipi ensimbi agqitshiwe kudinga ukulinganisela imininingwane eqinile yobuchwepheshe nezinto ezingokoqobo zezentengiselwano. Ukusungula isu lokuthenga eliqinile kuhilela ukuhlola amakhono omphakeli, ukuqonda imingcele yezokuthutha, kanye nokusebenzisa inqubo yokugunyaza eqinile.

Ngokuqhathanisa iziteshi zokuthola izinto ngokuhlelekile nokuqonda izinto ezibangela izindleko ezihlobene nokupakisha nokuthutha impahla, izinhlangano zingavikela ukufakwa kwekhwalithi ephezulu okuhambisana nezindinganiso ngenkathi zithuthukisa izindleko zazo zochungechunge lokuphakelwa.

Qhathanisa abahlinzeki basekhaya nabangenisa impahla kwamanye amazwe

Amaqembu okuthenga abhekene nokukhetha okuyisisekelo phakathi kokusebenzisa abasabalalisi basekhaya noma ukuthola ngqo ezimbonini zokungenisa impahla zaphesheya. Abahlinzeki basekhaya banikeza inzuzo ehlukile yezikhathi ezimfushane zokuhola—ngokuvamile ukugcwalisa ama-oda zingakapheli izinsuku ezi-3 kuya kweziyi-7—kanye nokusekelwa kobuchwepheshe okutholakala kalula. Kodwa-ke, lokhu kulula kuvame ukuba neprimiyamu yentengo engu-20% kuya ku-30%.

Ngakolunye uhlangothi, ukungenisa ngqo kubakhiqizi baphesheya kwezilwandle kunganciphisa kakhulu izindleko zamayunithi, ikakhulukazi kumaphrojekthi amakhulu. Lokhu kuhwebelana kuhilela izikhathi ezengeziwe zokuhola ezisukela ezinsukwini ezingama-45 kuya kwezingama-90 kanye nesidingo sohlelo lokuqinisekisa ikhwalithi yangaphakathi oluqinile ukuqinisekisa ukuthi amaqoqo angenisiwe anamathela ngokuqinile ezindinganisweni ezidingekayo ze-ASTM noma ze-EN ngaphambi kokuthunyelwa.

Izindleko, ukupakisha, kanye nezici zezokuthutha

Ukufakwa kwezinto kanye nokupakisha kudlala indima enkulu ezindlekweni zokugcina zokufakwa kwe-galvanized. Ukuthola imishini yokugaya ngqo ngokuvamile kudinga i-Minimum Order Quantity (MOQ) esukela ku-3 kuya ku-5 metric tons, okwenza ifaneleke kuphela ekwakhiweni okukhulu noma ekugcinweni kwempahla isikhathi eside.

Izindinganiso zokupakishwa nazo zithinta ikhwalithi lapho zifika. Izinto ezifakwayo kumele zithunyelwe ngamabhokisi noma ama-pallet okhuni aqinile anezingqimba zepulasitiki ezingagqwali kanye nama-desiccant ukuvimbela ukwakheka kokugqwala okumhlophe embozweni we-zinc ngesikhathi sokuhamba olwandle isikhathi eside.

Inqubo yokucacisa kanye nokugunyazwa

Ukusebenzisa inqubo yokucacisa esemthethweni kanye nenqubo yokugunyaza kuvikela umthengi ekutholeni izingxenye ezingaphansi kwezindinganiso. Ezinkontilekeni zokuthenga ezibalulekile, ikakhulukazi lezo ezinenani elingaphezu kuka-$50,000, inqubo kufanele iqale ngephakheji ephelele yokuthumela ehlanganisaamaphepha edatha yobuchwepheshe, ama-MTR, kanye nezitifiketi zokuhlolwa kwelebhu ezizimele.

Ngaphambi kokuzibophezela ekukhiqizeni ngobuningi, abathengi kufanele badinge amasampula angokoqobo ukuze ahlolwe. Kwezinye izimo, ukwenza isivumelwano ne-ejensi yokuhlola evela eceleni, njenge-SGS noma i-TUV, ukuze yenze ukuhlolwa kwangaphambi kokuthunyelwa efektri kunikeza ungqimba olubalulekile lokunciphisa ubungozi, okuqinisekisa ukuthi ukubekezelelana kobukhulu kanye nobukhulu be-galvanizing kufana ncamashi nendinganiso evunyelwe.

Indlela Yokwenza Ukukhetha Kokugcina

Ukwenza ukukhetha kokugcina kokufakwa kwamapayipi ensimbi agqitshiwe kudinga ukuhlanganisa amazinga obuchwepheshe, ukuhlolwa kwekhwalithi, kanye nemikhawulo yochungechunge lokuhlinzeka kube yisinqumo sokuthenga esihlangene.

Ngokuvumelanisa imininingwane yokufaneleka ngokunembile nezidingo zohlelo lokusebenza kanye nokusungula i-matrix yezinqumo ehlelekile, onjiniyela nabathengi bangaqinisekisa ukuphepha kohlelo, ukuthobela imithetho, kanye nokusebenza kahle kwezindleko.

Izindlela zokukhetha ngesicelo

Indlela eya ekukhetheni kokugcina iyahlukahluka ngokusekelwe ekubalulekeni kwesicelo. Kumapayipi anomfutho ophansi, ukunisela, noma izinhlelo zomoya eziyisisekelo ezicindezelwe, ukufakwa okujwayelekile kwe-Class 150 okuhambisana ne-ASME B16.3 noma i-EN 10242 ngokuvamile kwanele. Kulezi zimo, ukuthengwa kungathuthukisa izindleko kanye nokutholakala okusheshayo, uma nje kuhlangatshezwana nezindinganiso zokugqoka ze-zinc eziyisisekelo kanye nobukhulu.

Ngakolunye uhlangothi, ukusetshenziswa okunzima kwezimboni, imigqa yoketshezi enomfutho ophezulu, noma izinhlelo ezingaphansi kokudlidliza okukhulu kwemishini zidinga indlela eqinile kakhulu. Lezi zinhlelo zilawula ukusetshenziswa kwezingxenye ze-Class 300, zibeka phambili abakhiqizi abenza ukuhlolwa okungabhubhisi okungu-100% (NDT) futhi banikeze ukulandeleka okugcwele kwezinto, noma ngabe kudinga izikhathi ezinde zokuhola kanye nokusetshenziswa kwemali kokuqala okuphezulu.

Izindlela zokugcina zesinqumo

Isinqumo sokugcina kufanele siqhutshwe yi-matrix yezindinganiso ezilinganisiwe ukuze kususwe ukuthambekela enkambisweni yokuthenga. I-matrix ejwayelekile yokusebenza kahle inikeza isisindo esingu-40% ekuhambisaneni nobuchwepheshe kanye nezindinganiso, okuqinisekisa ukuthi ukuphepha akukaze kube sengozini.

Izindlela ezisele zivame ukwabela u-30% ezindlekweni eziphelele zokufika, u-20% esikhathini esiholayo kanye nokuthembeka kwempahla, kanye no-10% emlandweni womthengisi kanye nemigomo yewaranti. Ngokusebenzisa le ndlela ehlelekile, izinhlangano ziqinisekisa ukuthi ukukhetha kwazo kokugcina kokufakwa kwamapayipi ensimbi agqitshiwe kunikeza ukusebenza okuhle kakhulu, ukunamathela komthetho, kanye nenani lesikhathi eside.

Izinto Ezibalulekile Okufanele Uzicabangele

• Iziphetho ezibaluleke kakhulu kanye nesizathu sokufakwa kwamapayipi ensimbi agqitshwe nge-galvanized
• Imininingwane, ukuhambisana, kanye nokuhlolwa kwengozi okufanele kuqinisekiswe ngaphambi kokuthi uzibophezele
• Izinyathelo ezilandelayo ezisebenzayo kanye nezixwayiso abafundi abangazisebenzisa ngokushesha

imibuzo ejwayelekile ukubuzwa

Yiliphi izinga okufanele ngilikhethe lokufakwa kwamapayipi ensimbi agqitshwe nge-galvanized?

Qondanisa uhlelo kanye nemakethe: i-ASME/ASTM yaseNyakatho Melika, i-EN noma i-BS yaseYurophu, kanye ne-ISO yamaphrojekthi aphesheya. Qinisekisa imininingwane yephrojekthi ngaphambi koku-oda.

Ngingazi kanjani ukuthi i-fitting izohambisana yini nezintambo zami zepayipi?

Hlola intambo ejwayelekile kuqala: I-NPT ilandela i-ASME B1.20.1, kanti i-BSPT ilandela i-ISO 7-1. Ungazixubi, ngoba ukuvuza kungenzeka kakhulu ngaphansi kwengcindezi.

Yisiphi isidingo se-galvanizing esibalulekile lapho kuqhathaniswa izinto zokufaka?

Qinisekisa ukuthi i-hot-dip zinc coating ihlangabezana ne-ASTM A153 noma okulinganayo. Isilinganiso esisebenzayo singama-86 µm noma ama-610 g/m² okungenani ukuze kuvikelwe ukugqwala okuqinile.

Yisiphi isilinganiso sokucindezela okufanele ngisibheke kuma-fitting e-galvanized?

Sebenzisa izinsimbi ezinezilinganiso ze-Class 150 noma ze-Class 300 ezichazwe ngokucacile, kuye ngomklamo wesistimu yakho. Isilinganiso kumele sihambisane nomfutho wakho wokusebenza kanye nokushisa.

Ngingaqinisekisa kuphi imininingwane yokuthobela imithetho ngaphambi kokuthenga ku-nbfh-metal.com?

Buyekeza imininingwane yomkhiqizo kanye namakhasi esitifiketi ku-nbfh-metal.com. Qinisekisa indinganiso ebhalwe ohlwini, uhlobo lwentambo, isigaba sokucindezela, kanye nesidingo sokumboza ngaphambi kokufaka i-oda.