Kev ua tiav ntawm GB / T 29047-2012 "High-density Polyethylene sab nraud tu tube Polyurethane Polyette Yas Prefabricated Inspection Pipe" tus qauv lossis EN253 "Txhua qhov txheej txheem prefabricated rau hauv av thermal yeeb nkab network, uas yog ua haujlwm los ntawm cov kav dej ua haujlwm, polyurethane rwb thaiv tsev txheej. thiab polyethylene coat tubes Institutious insulation yeeb nkab "
1. Cov kav hlau hlau tuaj yeem siv tau: seamless steel kav, kauv steel kav thiab hluav taws xob vuam steel kav ua los ntawm 20# thiab Q235 steel, thiab cov ntsuas kev ua tau zoo raws li lub teb chaws thiab roj Ministry of Petroleum;
2. Lub seamless steel yeeb nkab txais GB / T8163-2008 tus qauv;
3. Cov kav hlau kav siv SY/T5037-2000, GB/T9711.1-2011, thiab cov kav hlau vuam siv GB/T3091-2001.
Raws li ib txwm muaj, DN 20-DN150 siv seamless lossis welded steel kav. Cov kav dej kauv hlau saum toj no DN200 kuj tseem siv tau raws li tus neeg siv yuav tsum tau ua.
Cov yeeb nkab steel qhov chaw txais yuav cov txheej txheem thawb lossis kev tawm tsam.
Execution standard:
1. Steel-rau-welded yeeb nkab qhov chaw GB/T12459-2005 steel phaj-rau-steel phaj-rau-welded yeeb nkab qhov chaw GB/T13401-2005 steel dabtsi yog khoov yeeb nkab SY/T5257-2004;
2. Lub tsho cov yeeb nkab ua rau GB13018-91 "Polyethylene (PE) yeeb nkab sab nraud thiab phab ntsa thickness txwv qhov sib txawv" tus qauv;
Polyurethane ncaj-faus thermal preservation technical parameters:
Axial shear zog: Ntau dua lossis sib npaug ntawm {{0}}}.12MPa (23 ± 2 degree C), kev ua haujlwm kub tsis tu ncua: 140 degree C max, qhov siab tshaj plaws ua haujlwm kub: 150 degree C max , kev pab lub neej: Ntau dua lossis sib npaug li 30 xyoo Lub neej muaj feem xyuam rau cov dej tsis zoo), qhov ntev ntawm cov kav dej yog 200mm-400mm, txoj kab uas hla: DN20-DN1200, qhov nruab nrab pore txoj kab uas hla: Tsawg dua lossis sib npaug li 0.5 hli, qhov kaw tus nqi siab dua lossis sib npaug li 88%, qhov ceev ntawm txhua txoj haujlwm Ntau dua lossis sib npaug li 60㎏ / m3, lub zog tiv thaiv lub zog siab dua lossis sib npaug rau 0.3MPa (hauv qab 10% deformation tej yam kev mob), dej nqus tus nqi: Tsawg dua los yog sib npaug rau 10% (100 degree C boiling dej 90 feeb).
High-density polyethylene sab nraud tu tube:
Qhov ceev Ntau dua lossis sib npaug li 9503/m3 (20 degree), carbon dub ntsiab lus: 2.5% ± 0.5% (mass feem pua), thermal conductivity: {{ 13}}.43W / (m. degree), thermal expansion coefficient: 18010-6 (1 degree), melting polyurethane ncaj qha faus thermal rwb thaiv tsev raj index: 0.50 ~ 0.70g (MFI 190 degree C / 5kg), stretching zog : Ntau dua los yog sib npaug rau 19MPa, pob txha elongation: Ntau dua lossis sib npaug li 350%, ib puag ncig kev ntxhov siab tawg: Ntau dua lossis sib npaug li 200h.
Txoj kev khaws cia:
1. Cov av yuav tsum tiaj tus, tsis muaj pob zeb thiab lwm yam tawv impurities.
2. Ua kom cov dej ntws pov tseg thaum tso qhov chaw, thiab dej yuav tsum tsis txhob khaws cia hauv qhov chaw.
3. Cov yeeb nkab custard yuav tsum tau muab tso rau hauv qhov chaw stacking, thiab sab nraud tu tube yuav tsum yog 150mm siab tshaj hauv av.
4. Qhov siab ntawm cov yeeb nkab rwb thaiv tsev yuav tsum tsis txhob siab tshaj 2 meters.
5. Lub thermal rwb thaiv tsev raj yuav tsum tsis txhob npog nrog cov tunnels thaum lub hnub raug tua, los nag thiab ntub dej, thiab qhib-air.
