Kulwakhiwo kunye nobunjineli boluntu, ukukhethwa kwezinto eziphathekayo kubalulekile ukuqinisekisa ukuthembeka kunye nokuphila ixesha elide kwesakhiwo. Enye into ehlonitshwa kakhulu kwishishini ngumbhobho we-ASTM A252. Inkcazo igubungela i-cylindrical, i-nominal wall metal pipes pills, eziyimfuneko kwiintlobo ezahlukeneyo zezicelo, ngakumbi kubunjineli besiseko. Kule bhlog, siza kuntywila nzulu kwiinkcukacha eziphambili kunye nokusetyenziswa kwe-ASTM A252 ubungakanani bemibhobho ngelixa siqaqambisa amandla omenzi okhokelayo oseCangzhou, kwiPhondo laseHebei.
Iimpawu eziphambili zeebhobho ze-ASTM A252
I-ASTM A252 yinkcazo esemgangathweni echaza iimfuno zemibhobho yentsimbi edityanisiweyo kunye nengenamthungo. Le mibhobho yenzelwe ukusetyenziswa njengamalungu asisigxina athwele umthwalo okanye njengamaqokobhe eemfumba zekhonkrithi ezifakwe kwindawo. Iimpawu eziphambili ze-ASTM A252 ziquka:
1. IBanga leMaterial: I-specification ibandakanya amabakala amathathu entsimbi: iBakala 1, iBakala 2, neBakala 3. Ibakala ngalinye linemfuno eyahlukileyo yamandla esivuno, iBakala 3 linegunya eliphezulu lemveliso kwaye lifanele izicelo ezinzima.
2. Ubungakanani: Iibhobho ze-ASTM A252 zifumaneka kwiindonga ezihlukeneyo ezihlukeneyo, ezivumela ukuguquguquka koyilo kunye nokusetyenziswa. Le mibhobho ifumaneka kwi-diameters ukusuka kwi-intshi ezi-6 ukuya kwii-intshi ezingama-60 ukuhlangabezana neemfuno ezahlukeneyo zeprojekthi.
3. Iinketho ezidityanisiweyo nezingenamthungo:Umbhobho we-ASTM A252inokuveliswa i-welded okanye ingenamthungo, inika iinketho ezisekelwe kwiimfuno ezithile zeprojekthi yakho. Umbhobho odibeneyo ngokuqhelekileyo uneendleko eziphezulu, ngelixa umbhobho ongenamthungo unika amandla amakhulu kunye nokuthembeka.
4. Ukuxhatshazwa kwe-Corrosion: Ngokuxhomekeke kwisicelo, iipayipi ze-ASTM A252 zinokuthi zifakwe okanye ziphathwe ukuze ziphucule ukuxhathisa ukubola, ukuqinisekisa ukusetyenziswa kwexesha elide nakwiindawo ezinzima.
Izicelo zemibhobho ye-ASTM A252
Ukuguquguquka kombhobho we-ASTM A252 kwenza ukuba ilungele uluhlu olubanzi lwezicelo, kubandakanya:
- Iimfumba zeSiseko: Le mibhobho isoloko isetyenziswa njengeemfumba zesiseko kwiiprojekthi zokwakha, ibonelela ngenkxaso eyimfuneko kwizakhiwo, iibhulorho kunye nezinye izakhiwo.
- Ulwakhiwo lwaseLwandle: Imibhobho ye-ASTM A252 ifaneleke kakuhle ukuba isetyenziswe kwindawo ezihlala elwandle kwaye ingasetyenziselwa ekwakhiweni kweedokhi, iipiers, kunye namaqonga angaphesheya.
- Ukugcina iindonga: Ukuqina kunye nokuqina kwale mibhobho kubenza bafaneleke ukusetyenziswa kwiindonga zokugcina, ezinceda ukuzinzisa umhlaba kunye nokuthintela ukukhukuliseka.
-Iimfumba zekhonkrithi ezifakelweyo: Xa zisetyenziswa njengendawo yokugcina iimfumba zekhonkrithi,I-ASTM A252umbhobho ubonelela ngesakhelo esomeleleyo esomeleza isidima sesakhiwo sekhonkrithi.
UMvelisi oPhambili eCangzhou
Umvelisi owaziwayo oseCangzhou, kwiPhondo laseHebei, uvelisa imibhobho ye-ASTM A252 ekumgangatho ophezulu ukususela ekusekweni kwayo ngo-1993. Umenzi uzibophelele ekuboneleleni ngeemveliso ezihlangabezana nemigangatho engqongqo yomgangatho, ukuqinisekisa ukuba imibhobho yayo ye-ASTM A252 ithembekile kwaye ihlala ihlala njalo kwizicelo ezahlukeneyo.
Ngokugxininisa kwizinto ezintsha kunye nokwaneliseka kwabathengi, inkampani iye yaba yinkokeli yoshishino, ibonelela ngezisombululo zesiko ukuhlangabezana neemfuno ezizodwa zabathengi bayo. Ngamaziko asemgangathweni kunye nabasebenzi abanamava, bayakwazi ukuvelisa imibhobho kwiinkcukacha eziphezulu, okwenza ukuba babe ngumlingani othembekileyo wokwakha kunye neeprojekthi zobunjineli.
ukuququmbela
Ukuqukumbela, imibhobho ye-ASTM A252 iyinxalenye ebalulekileyo yolwakhiwo lwangoku, ibonelela ngeenkcukacha eziphambili ezihlangabezana neemfuno zezicelo ezahlukeneyo. Ngomvelisi ohloniphekileyo e-Cangzhou ovelisa le mibhobho, imboni inokuthembela kwizinto eziphezulu zokuqinisekisa ukhuseleko kunye nokuzinza kwesakhiwo. Ingaba isetyenziselwa ubunjineli besiseko, izakhiwo zaselwandle okanye iindonga zokugcina, iipayipi ze-ASTM A252 zikhetho olubalulekileyo kwiinjineli kunye nabakhi.
Ixesha lokuposa: Feb-11-2025