Ukuqonda iiNzuzo ze-ASTM A139 Spiral Steel Pipe yeMibhobho yeGesi yeNdalo engaphantsi komhlaba

Yazisa:

Xa kuziwa ekuthuthweni kwegesi yendalo, ukubaluleka kwemibhobho engaphantsi komhlaba ayinakugqithiswa.Le mibhobho iqinisekisa unikezelo olukhuselekileyo nolusebenzayo lwala mandla abalulekileyo kumakhaya, kumashishini nakumashishini.Ukuqinisekisa ubude obude, ukuthembeka kunye nokuqina kwale mibhobho, ukusetyenziswa kwezinto ezisemgangathweni kubalulekile.Phakathi kokhetho oluninzi olukhoyo,I-ASTM A139umbhobho wensimbi ojikelezayo ugqame njengokhetho olukhethekileyo.Kule bhlog, siza kuntywila kwiimpawu kunye nezibonelelo ezenza i-ASTM A139 ibe yimathiriyeli yokhetho kwimibhobho yegesi yendalo ephantsi komhlaba.

IPropati yoomatshini

Ukuqulunqwa kwemichiza

Uvavanyo lweHydrostatic

Ubude bombhobho ngamnye buya kuvavanywa ngumenzi kuxinzelelo lwe-hydrostatic oluya kuvelisa eludongeni lombhobho uxinzelelo olungekho ngaphantsi kwama-60% obona buncinci buchaziweyo bamandla esivuno kwindawo yobushushu begumbi.Uxinzelelo luya kumiselwa ngolu nxaki lulandelayo:
P=2St/D

Ukwahluka okuvumelekileyo kubunzima kunye nemilinganiselo

Ubude bombhobho ngamnye buya kulinganiswa ngokwahlukileyo kwaye ubunzima bawo abuyi kwahluka ngaphezu kwe-10% ngaphezulu okanye i-5.5% phantsi kobunzima bethiyori, kubalwe kusetyenziswa ubude bayo kunye nobunzima bayo ngobude beyunithi.
Idayamitha yangaphandle ayisayi kwahluka ngaphezu kwe ±1% kwidayamitha echaziweyo yangaphandle echaziweyo.
Ubunzima bodonga nakweyiphi na indawo abuyi kuba ngaphezu kwe-12.5% ​​phantsi kobukhulu bodonga oluchaziweyo.

Ubude

Ubude obubodwa obungakhethiyo: 16 ukuya ku-25ft (4.88 ukuya ku-7.62m)
Ubude obuphindwe kabini obungenamkhethe: ngaphezulu kwe-25ft ukuya kwi-35ft (7.62 ukuya kwi-10.67m)
Ubude obufanayo: ukwahluka okuvumelekileyo ±1in

Iyaphela

Iimfumba zemibhobho ziya kubonelelwa ngeziphelo ezicacileyo, kwaye i-burrs ekupheleni iya kususwa.
Xa isiphelo sombhobho esichazwe ukuba sibe yi-bevel siphela, i-angle iya kuba ngama-30 ukuya kuma-35 degrees

I-ASTM A139: Ukhetho lweUmbhobho weGesi yeNdalo engaphantsi komhlabaimigca:

1. Ukomelela kunye nokuqina:

I-ASTM A139umbhobho wentsimbi ejikelezayoiyaziwa ngokubanga kwayo okugqwesileyo kunye namandla empembelelo.Ezi mpawu zibalulekile kwimibhobho yerhasi yendalo ephantsi komhlaba kuba ihlala isesichengeni seemeko ezahlukeneyo zokusingqongileyo kunye noxinzelelo oluphantsi komhlaba.Uyilo olujikelezayo lombhobho wensimbi luphucula ukunyaniseka kwesakhiwo, ukuvumela ukuba imelane noxinzelelo oluphezulu lwangaphandle kunye nokunciphisa umngcipheko wokuvuza okanye ukuphuka.

2. Ukumelana nokuMhlwa:

Imibhobho engaphantsi komhlaba isengozini yokubola okubangelwa ngamanzi, iikhemikhali zomhlaba kunye nezinye izinto.I-ASTM A139 umbhobho wentsimbi ejikelezayo usombulula le ngxaki ngokubonelela ngokumelana nokugqwesa okuphezulu.Oku kubangelwa ikakhulu kwi-coating yayo ene-zinc-rich, enika umqobo okhuselayo kwizinto ezitshabalalisayo, ukuqinisekisa ixesha elide lombhobho kunye nokunciphisa imfuno yokugcinwa rhoqo okanye ukutshintshwa.

3. Ukuweldability kunye nokuguquguquka:

I-ASTM A139 umbhobho wensimbi ojikelezayo unomsebenzi obalaseleyo we-weldability, ovumela amajoyina agudileyo, asebenzayo ngexesha lofakelo.Olu phawu luluncedo ngakumbiimibhobho yegesi yendalo ephantsi komhlaba, njengoko iqinisekisa ukunyaniseka kwenkqubo yombhobho kunye nokunciphisa umngcipheko wokuvuza.Ukongezelela, ukuguquguquka kombhobho wensimbi ojikelezayo kuvumela ukuba wenziwe lula kwiintlobo ezahlukeneyo zobude kunye nobubanzi ukuhlangabezana neemfuno zeprojekthi ezahlukeneyo, ngaloo ndlela kunceda kwiindleko-zokusebenza kunye nokwenza ngokwezifiso.

4. Ukusebenza kakuhle kweendleko:

Olunye uncedo olubalulekileyo lokusebenzisa i-ASTM A139 yombhobho wentsimbi ejikelezayo kwimibhobho yegesi yendalo ephantsi komhlaba kukusebenza kwayo ngeendleko.Ukuqina kwezinto eziphathekayo, ukuxhathisa ukubola kunye nokulula kokufakela kunciphisa ukugcinwa kwexesha elide kunye neendleko zokutshintsha.Ukongezelela, umlinganiselo wayo ophezulu wamandla-kuya-ubunzima unciphisa imfuno yezakhiwo zenkxaso ebanzi ngexesha lofakelo, okukhokelela ekugcinweni kweendleko ngokubanzi.

5. Iingqwalasela zokusingqongileyo:

I-ASTM A139 yombhobho wentsimbi ejikelezayo yenziwa kusetyenziswa iinkqubo ezihambelana nokusingqongileyo kwaye ithobela imigangatho engqongqo yokhuseleko.Iipropathi zayo ezikwaziyo ukumelana ne-corrosion zinceda ukuthintela ukuvuza kwegesi, ekugqibeleni kuncitshiswe impembelelo yokusingqongileyo.Ukongeza, ukuphinda kusetyenziswe intsimbi kuyenza ibe lukhetho oluhambelana nokusingqongileyo, kugxininiswa ngakumbi kwiinzuzo ezizinzileyo zokusebenzisa i-ASTM A139 umbhobho wentsimbi ojikelezayo kwimibhobho yegesi yendalo ephantsi komhlaba.

Ukuququmbela:

Ukukhetha izixhobo ezifanelekileyo kwimibhobho yerhasi yendalo ephantsi komhlaba kubalulekile ekuqinisekiseni uthutho olukhuselekileyo, olusebenzayo noluthembekileyo lomthombo wamandla oxabisekileyo.I-ASTM A139 umbhobho wensimbi ojikelezayo lolona khetho lubalaseleyo ngenxa yokuqina kwayo, ukuqina, ukuxhathisa umhlwa, ukuwelda, ukusebenza kakuhle kweendleko, kunye nokuqwalaselwa kokusingqongileyo.Iipropati zayo ezizodwa zenza ukhetho lokuqala kwiinjineli kunye nabaphathi beeprojekthi abafuna ukwakha imibhobho yegesi yendalo engaphantsi komhlaba eya kumelana novavanyo lwexesha.Ngotyalo-mali kwizinto ezisemgangathweni ezifana ne-ASTM A139 yombhobho wensimbi ojikelezayo, sinokuqinisekisa ukugcinwa kunye nokhuseleko lwezibonelelo zokusasazwa kwegesi yendalo kwizizukulwana ezizayo.