Kumvetsetsa Ubwino wa ASTM A139 Spiral Steel Pipe for Underground Natural Gas Pipelines

Tsegulani:

Pankhani ya kayendedwe ka gasi, kufunika kwa mapaipi apansi panthaka sikungapitirire.Mapaipiwa amatsimikizira kuperekedwa kotetezeka komanso koyenera kwa mphamvu zofunikazi kunyumba, mabizinesi ndi mafakitale.Kuonetsetsa kuti nthawi yayitali, yodalirika komanso yodalirika ya mapaipiwa, kugwiritsa ntchito zipangizo zapamwamba ndizofunikira kwambiri.Pakati pa zosankha zambiri zomwe zilipo,ASTM A139chitoliro chachitsulo chozungulira chimawonekera ngati chisankho chapadera.Mubulogu iyi, tilowa muzinthu ndi zopindulitsa zomwe zimapangitsa ASTM A139 kukhala chinthu chosankha pamapaipi apansi panthaka.

Mechanical Property

Chemical Composition

Kuyesedwa kwa Hydrostatic

Utali uliwonse wa chitoliro uyenera kuyesedwa ndi wopanga ku mphamvu ya hydrostatic yomwe idzapangitse mukhoma wa chitoliro kupsinjika kosachepera 60% ya mphamvu zokolola zosachepera zomwe zafotokozedwa kutentha.Kupanikizika kumatsimikiziridwa ndi equation yotsatirayi:
P=2St/D

Kusiyanasiyana Kololedwa Pakulemera ndi Makulidwe

Utali uliwonse wa chitoliro uyenera kuyezedwa padera ndipo kulemera kwake sikuyenera kusiyana kuposa 10% kuposa kapena 5.5% pansi pa kulemera kwake, kuwerengeredwa pogwiritsa ntchito kutalika kwake ndi kulemera kwake pa kutalika kwake.
Kuzungulira kwakunja sikuyenera kusiyanasiyana kupitilira ± 1% kuchokera m'mimba mwake mwadzina.
Makulidwe a khoma nthawi iliyonse sayenera kupitirira 12.5% ​​pansi pa makulidwe omwe atchulidwa.

Utali

Kutalika kwachisawawa chimodzi: 16 mpaka 25ft (4.88 mpaka 7.62m)
Kutalika kwapawiri: kupitirira 25ft mpaka 35ft(7.62 mpaka 10.67m)
Utali wofanana: kusiyanasiyana kovomerezeka ±1in

Kutha

Milu ya mipope iyenera kukhala ndi malekezero omveka, ndipo ma burrs kumapeto kwake adzachotsedwa.
Pamene mapeto a chitoliro amatchulidwa kuti ndi bevel amatha, ngodya iyenera kukhala 30 mpaka 35 digiri

ASTM A139: Kusankhidwa kwaChitoliro cha Gasi Wachilengedwe Pansi Pansimizere:

1. Mphamvu ndi kulimba:

ASTM A139chitoliro chachitsulo chozunguliraimadziwika chifukwa cha kulimba kwake komanso mphamvu zake.Makhalidwewa ndi ofunikira kwambiri pamapaipi apansi panthaka chifukwa amakumana ndi zovuta zosiyanasiyana zachilengedwe komanso zapansi panthaka.Mapangidwe ozungulira a chitoliro chachitsulo amakulitsa kukhulupirika kwake, kulola kuti athe kulimbana ndi zovuta zakunja zakunja ndikuchepetsa chiopsezo cha kutulutsa kapena kuphulika.

2. Kukana dzimbiri:

Mapaipi apansi panthaka amatha kuwonongeka ndi dzimbiri chifukwa cha madzi, mankhwala am'nthaka ndi zinthu zina.Chitoliro chachitsulo cha ASTM A139 chimathetsa vutoli popereka kukana kwamphamvu kwa dzimbiri.Izi makamaka chifukwa cha kupaka kwake kwa zinc, komwe kumapereka chotchinga choteteza ku zinthu zowononga, kuonetsetsa kuti chitolirocho chikhale chautali komanso kuchepetsa kufunika kokonzanso kapena kusinthidwa pafupipafupi.

3. Weldability ndi ntchito zosiyanasiyana:

ASTM A139 ozungulira zitsulo chitoliro ali weldability kwambiri, kulola osalala, olowa bwino pa unsembe.Izi ndizopindulitsa makamaka kwamapaipi a gasi apansi panthaka, chifukwa zimatsimikizira kukhulupirika kwa dongosolo la mapaipi ndi kuchepetsa chiopsezo cha kutayikira.Kuonjezera apo, kusinthasintha kwa chitoliro chachitsulo chozungulira kumapangitsa kuti chipangidwe mosavuta muutali ndi ma diameter osiyanasiyana kuti chikwaniritse zofunikira za polojekiti, motero zimathandiza kuti zikhale zotsika mtengo komanso zosinthika.

4. Kutsika mtengo:

Ubwino winanso wofunikira wogwiritsa ntchito chitoliro chachitsulo cha ASTM A139 pamapaipi apansi a gasi achilengedwe ndiwotsika mtengo.Kukhazikika kwazinthuzo, kukana kwa dzimbiri komanso kumasuka kwa unsembe kumachepetsa kukonzanso kwanthawi yayitali komanso ndalama zosinthira.Kuonjezera apo, chiŵerengero chake champhamvu-kulemera-kulemera chimachepetsa kufunikira kwa zomangamanga zowonjezereka panthawi yoika, zomwe zimapangitsa kuti ndalama zonse ziwonongeke.

5. Zoganizira zachilengedwe:

Chitoliro chachitsulo cha ASTM A139 chimapangidwa pogwiritsa ntchito njira zokondera zachilengedwe ndipo chimatsatira mfundo zotetezeka.Makhalidwe ake osagwirizana ndi dzimbiri amathandizira kuti gasi asatayike, ndikuchepetsa kuwonongeka kwa chilengedwe.Kuphatikiza apo, kubwezeretsedwanso kwachitsulo kumapangitsa kuti ikhale njira yosamalira zachilengedwe, ndikugogomezeranso zaubwino wogwiritsa ntchito chitoliro chachitsulo cha ASTM A139 pamapaipi apansi panthaka.

Pomaliza:

Kusankha zipangizo zoyenera za mapaipi a gasi apansi panthaka n'kofunika kwambiri kuti kuwonetsetse kuyenda kotetezeka, kothandiza komanso kodalirika kwa gwero lamphamvu lamagetsi.Chitoliro chachitsulo cha ASTM A139 ndi chisankho chabwino kwambiri chifukwa cha mphamvu zake, kulimba kwake, kukana kwa dzimbiri, kutsekemera, kutsika mtengo, komanso kuganizira zachilengedwe.Kapangidwe kake kapadera kamapangitsa kukhala chisankho choyamba kwa mainjiniya ndi oyang'anira mapulojekiti omwe akufuna kupanga mapaipi amafuta achilengedwe apansi panthaka omwe angapirire pakapita nthawi.Pogulitsa zinthu zabwino kwambiri monga ASTM A139 spiral steel pipe, titha kuonetsetsa kuti malo ogawa gasi azikhala okhazikika komanso otetezeka m'mibadwo ikubwera.