Cov yeeb nkab hlau yog ib hom cam khwb cia hlau, hlau alloy, carbon thiab silicon. Graphite nyob rau hauv ductile hlau muaj nyob rau hauv daim ntawv kheej kheej, thiab qhov loj ntawm graphite yog 6-7 qib. Nyob rau hauv cov nqe lus ntawm kev ua tau zoo, nws yuav tsum tau hais tias spheroidization qib ntawm cov cam khwb cia cov yeeb nkab yuav tsum tau tswj ntawm 1-3 qib (spheroidization tus nqi siab tshaj los yog sib npaug rau 80 feem pua), yog li cov neeg kho tshuab khoom ntawm cov khoom nws tus kheej ua tau zoo. txhim kho zoo dua, nrog rau cov ntsiab lus ntawm hlau thiab kev ua haujlwm ntawm cov hlau. Cov qauv metallographic ntawm cov yeeb nkab annealed ductile hlau yog ferrite ntxiv rau ib qho me me ntawm pearlite, thiab nws cov khoom siv tau zoo.
Cov yeeb nkab hlau yog feem ntau hu ua centrifugal ductile hlau yeeb nkab. Nws muaj cov ntsiab lus ntawm cov hlau thiab kev ua tau zoo ntawm cov hlau, zoo heev los tiv thaiv corrosion, zoo ductility, zoo sealing nyhuv, yooj yim installation, thiab yog tsuas yog siv rau dej, kis tau tus mob, thiab kev thauj mus los hauv nroog thiab industrial thiab mining lag luam. roj thiab lwm yam. Nws yog thawj qhov kev xaiv rau cov kav dej xa dej nrog kev ua haujlwm siab. Piv nrog rau PE kav, cov kav dej ductile yog yooj yim dua thiab nrawm dua rau nruab dua PE kav dej raws li lub sij hawm installation, thiab cov kabmob sab hauv thiab sab nraud yog zoo dua tom qab kev teeb tsa; los ntawm qhov kev xav ntawm airtightness thiab corrosion kuj, ductile number case kav yog zoo dua airtight tom qab installation, thiab kuj muaj ntau yam los tiv thaiv corrosion txoj kev yuav siv tau los txhim kho lub anti-corrosion kev ua tau zoo; los ntawm qhov kev xav ntawm hydraulic kev ua tau zoo, qhov tshwj xeeb ntawm cov kav dej number case feem ntau yog hais txog lub puab txoj kab uas hla, thiab cov specification ntawm PE yeeb nkab feem ntau yog hais txog cov txheej kab uas hla, vim hais tias nyob rau hauv tib specification tej yam kev mob, ductile number case raj muaj peev xwm ua tau ntau dua ntws ntws; Nyob rau hauv cov nqe lus ntawm kev teeb tsa thiab kev saib xyuas cov nqi, cov raj xaim number case muaj cov nqi zoo dua. Sab hauv phab ntsa yog txau nrog zinc, cement mortar anti-corrosion cov ntaub ntawv, thiab lwm yam.
Cov Qauv Khoom
GB/T 13295-2019 Cov kav dej kav dej, fittings thiab cov khoom siv rau dej thiab roj GB/T 17457 Cov Lus Qhia Tshwj Xeeb rau Cement Mortar Centrifugal Lineing ntawm Ductile Iron Pipes
GB / T 17458 Kev tshuaj xyuas cov tshuaj khib nyiab tshiab rau cov cement mortar hauv ob sab phlu ntawm cov kav hlau los ntawm txoj kev centrifugal
GB/T 17459 Ductile Iron Pipe Bituminous Txheej
GB / T 17456 Hlau yeeb nkab nto txau nrog zinc
GB/T 17219 Kev Ntsuam Xyuas Kev Nyab Xeeb Kev Nyab Xeeb rau Kev Sib Txuas Dej Haus thiab Kev faib khoom thiab cov khoom siv tiv thaiv
Engineering qauv
"Code for Construction Quality Txais Kev Siv Dej Hauv Tsev, Dej Dej thiab Cua Sov Engineering" GB50242-2002
Cov lus qhia xaiv
1. Kev xaiv cov kav hlau kav hlau yuav tsum tau ua raws li cov xwm txheej tshwj xeeb ntawm qhov chaw tso, thiab daim ntawv sib txuas ntawm cov kav dej ncaj thiab fittings yuav tsum tau xaiv.
2. Lub nplhaib roj hmab feem ntau yog ua los ntawm NBR, SBR, EPDM thiab lwm yam ntaub ntawv.
3. Kev xaiv txheej: xaiv cov txheej txheem tsim nyog raws li cov txheej txheem sab hauv thiab sab nraud thaum siv. Cov txheej txheem sab hauv uas twb muaj lawm yog cov khoom tshiab ntawm cov kav hlau hlau xws li epoxy resin, polyurethane sab hauv thiab txheej txheej, thiab PE zaj duab xis txheej, thiab lawv cov khoom yuav tsum tau nkag siab meej thaum xaiv lawv.
Nyob rau hauv nruab nrab thiab tsis tshua muaj siab cov yeeb nkab network (feem ntau siv hauv qab 6MPa), cov yeeb nkab hlau muaj cov yam ntxwv ntawm kev nyab xeeb thiab txhim khu kev qha, tsis tshua muaj kev puas tsuaj, yooj yim thiab ceev kev tsim kho thiab tu, thiab zoo heev los tiv thaiv corrosion. Feem ntau tsis siv nyob rau hauv high-pressure yeeb nkab network (siab dua 6MPa). Vim tias cov yeeb nkab lub cev yog qhov loj heev, cov tshuab yuav tsum tau siv thaum lub sijhawm teeb tsa. Yog tias muaj dej ntws tom qab qhov kev ntsuas siab, tag nrho cov kav dej yuav tsum tau khawb tawm, cov kav dej yuav tsum tau nqa mus rau qhov siab uas lawv tuaj yeem muab tso rau hauv cov clamps, thiab cov clamps yuav tsum tau muab ntsia kom tiv thaiv cov dej tawm.
