Ukuqonda Izinzuzo ze-ASTM A139 Spiral Steel Pipe for Underground Natural Gas Pipelines

Yethula:

Uma kuziwa ekuthuthweni kwegesi yemvelo, ukubaluleka kwamapayipi angaphansi komhlaba angeke kugcizelelwe.La mapayipi aqinisekisa ukulethwa okuphephile nokusebenza kahle kwalamandla abalulekile emakhaya, amabhizinisi kanye nezimboni.Ukuqinisekisa ukuphila isikhathi eside, ukwethembeka kanye nokuqina kwala mapayipi, ukusetshenziswa kwezinto ezisezingeni eliphezulu kubalulekile.Phakathi kwezinketho eziningi ezitholakalayo,I-ASTM A139Ipayipi lensimbi elivunguzayo liphuma phambili njengokukhetha okukhethekile.Kule bhulogi, sizocwila ezicini nasezinzuzweni ezenza i-ASTM A139 ibe yinto ekhethwayo yamapayipi egesi yemvelo angaphansi komhlaba.

Impahla Mechanical

Ukwakheka Kwamakhemikhali

Ukuhlolwa kwe-Hydrostatic

Ubude bepayipi ngalinye kufanele buhlolwe ngumenzi kumfutho we-hydrostatic ozokhiqiza odongeni lwamapayipi ingcindezi engekho ngaphansi kuka-60% wamandla esivuno amancane ashiwo ekamelweni lokushisa.Ingcindezi izonqunywa yi-equation elandelayo:
P=2St/D

Ukwehluka Okuvumelekile Kwesisindo Nobukhulu

Ubude bepayipi ngalinye buzokalwa ngokuhlukene futhi isisindo salo akumele sihluke ngaphezu kuka-10% ngaphezulu noma u-5.5% ngaphansi kwesisindo salo esicatshangelwayo, kubalwe kusetshenziswa ubude balo nesisindo salo ngobude beyunithi ngayinye.
Idayamitha yangaphandle akumele ihluke ngaphezu kuka-±1% ukusuka kububanzi obukhethekile obushiwo bengaphandle.
Ukujiya kodonga kunoma iyiphi indawo akumele kube ngaphezu kuka-12.5% ​​ngaphansi kogqinsi olushiwo.

Ubude

Ubude obungahleliwe obubodwa: 16 kuya ku-25ft(4.88 kuya ku-7.62m)
Ubude obuphindwe kabili obungahleliwe: ngaphezulu kwama-25ft kuya ku-35ft(7.62 kuya ku-10.67m)
Ubude obufanayo: ukuhluka okuvumelekile ±1in

Iyaphela

Izinqwaba zamapayipi zizonikezwa iziphetho ezicacile, futhi ama-burrs ekugcineni azosuswa.
Lapho ukuphela kwepayipi okushiwo ukuthi kube yi-bevel iphela, i-engeli izoba ngu-30 kuya ku-35 degree

I-ASTM A139: Ukukhethwa kweIpayipi Legesi Yemvelo Elingaphansi Komhlabaimigqa:

1. Amandla nokuqina:

I-ASTM A139ipayipi lensimbi elivunguzayoyaziwa ngokuqina kwayo okuhle kakhulu namandla anomthelela.Lezi zimfanelo zibalulekile kumapayipi egesi yemvelo angaphansi komhlaba ngoba ahlala echayeke ezimweni ezihlukahlukene zemvelo kanye nezimo zengcindezi engaphansi komhlaba.Idizayini evunguzayo yepayipi lensimbi ithuthukisa ubuqotho bayo besakhiwo, ukuyivumela ukuthi imelane nezingcindezi eziphakeme zangaphandle futhi inciphise ingozi yokuvuza noma ukuqhekeka.

2. Ukumelana nokugqwala:

Amapayipi angaphansi komhlaba asengozini yokugqwala okubangelwa amanzi, amakhemikhali enhlabathi nezinye izici.Ipayipi lensimbi elivunguzayo le-ASTM A139 lixazulula le nkinga ngokunikeza ukumelana nokugqwala okuphakeme.Lokhu ikakhulukazi ngenxa yokwemboza kwayo okune-zinc ecebile, okunikeza isithiyo sokuzivikela ngokumelene nezakhi ezibolayo, ukuqinisekisa ubude bepayipi nokunciphisa isidingo sokugcinwa njalo noma ukushintshwa.

3. Ukushisela nokuguquguquka:

Ipayipi lensimbi elivunguzayo le-ASTM A139 linokushisela okuhle kakhulu, livumela amalunga abushelelezi, asebenza kahle ngesikhathi sokufakwa.Lesi sici sizuzisa kakhuluamapayipi egesi yemvelo angaphansi komhlaba, njengoba iqinisekisa ubuqotho besistimu yamapayipi futhi inciphisa ingozi yokuvuza.Ukwengeza, ukuguquguquka kwepayipi lensimbi elivunguzayo livumela ukuthi lenziwe kalula ezinhlobonhlobo zobude nobubanzi ukuze kuhlangatshezwane nezidingo zephrojekthi ehlukene, ngaleyo ndlela kusize ekungabizini kwezindleko nokwenza ngokwezifiso.

4. Ukusebenza kahle kwezindleko:

Enye inzuzo ebalulekile yokusebenzisa ipayipi lensimbi elivunguzayo le-ASTM A139 kumapayipi egesi yemvelo angaphansi komhlaba ukusebenza kahle kwawo kwezindleko.Ukuqina kwempahla, ukumelana nokugqwala kanye nokufaka kalula kunciphisa ukugcinwa kwezindleko zesikhathi eside nokushintshwa.Ukwengeza, isilinganiso sayo esiphezulu samandla nesisindo sinciphisa isidingo sezakhiwo ezibanzi zokusekela phakathi nokufakwa, okuholela ekongeni kwezindleko zizonke.

5. Ukucatshangelwa kwemvelo:

Ipayipi lensimbi elivunguzayo le-ASTM A139 lakhiwe kusetshenziswa izinqubo ezihambisana nemvelo futhi linamathela ezindinganisweni eziqinile zokuphepha.Izakhiwo zayo ezimelana nokugqwala zisiza ukuvimbela ukuvuza kwegesi, ekugcineni kunciphise umthelela wemvelo.Ukwengeza, ukugaywa kabusha kwensimbi kuyenza ibe inketho evumelana nemvelo, kuphinde kugcizelele izinzuzo ezisimeme zokusebenzisa ipayipi lensimbi elivunguzayo le-ASTM A139 lamapayipi egesi yemvelo angaphansi komhlaba.

Ekuphetheni:

Ukukhetha izinto ezifanele zamapayipi egesi yemvelo angaphansi komhlaba kubalulekile ukuze kuqinisekiswe ukuthuthwa okuphephile, okuphumelelayo nokuthembekile kwalo mthombo wamandla obalulekile.Ipayipi lensimbi elivunguzayo le-ASTM A139 iyisinqumo esihle kakhulu ngenxa yamandla ayo, ukuqina, ukumelana nokugqwala, ukushisela, ukusebenza kahle kwezindleko, nokucatshangelwa kwemvelo.Izakhiwo zayo eziyingqayizivele zikwenza kube ukukhetha kokuqala konjiniyela nabaphathi bephrojekthi abafuna ukwakha amapayipi egesi yemvelo angaphansi komhlaba azomelana nesikhathi.Ngokutshala imali ezintweni ezisezingeni eliphezulu njengepayipi lensimbi elivunguzayo le-ASTM A139, singaqinisekisa ingqalasizinda yokusabalalisa igesi yemvelo esimeme nephephile ezizukulwaneni ngezizukulwane.