Sechikamu chakakosha cheinjiniya yepombi yemazuva ano, mapaipi esimbi akaiswa insulated anoshandiswa zvakanyanya mukudziya, kutonhora, petrochemical, uye mamwe minda. Hunhu hwavo hwekuvaka hunokanganisa zvakananga kushanda kwesimba, kusimba, uye kuchengetedzeka. Kuti ive nechokwadi chekuti insulated simbi yekuvakwa kwepombi inoenderana nemirau, kuteedzera kwakaringana kune akakodzera tekinoroji zviyero kwakakosha, zvinoda kudzora zvine hungwaru kubva pakusarudza zvinhu, kugadzirira kuvaka, uye maitiro ekuisa.
I. Material Standards uye Kugamuchirwa
Zvinhu zvikuru zvepombi dzesimbi dzakaiswa insusulated zvinosanganisira pombi yesimbi, insulation layer (senge polyurethane foam, rock wool), uye casing yekunze (seyakakwira-density polyethylene kana galvanized iron). Kuvakwa kusati kwavakwa, zvese zvinofanirwa kufambirana nezvinodiwa nenyika, zvakaita se "GB/T 29047-2012 High-density polyethylene outer casing, polyurethane foam plastic prefabricated direct{{6}yakavigwa insulated pombi" kana "GB/T 17393-2008 Technical Insulated Specification"
Pipe yeSimbi: Inofanirwa kuenderana neGB/T 8163-2018 Seamless Steel Pipe yeFluid Transportation kana GB/T 3091-2015 Welded Steel Pipe yeLow-Pressure Fluid Transportation, kuve nechokwadi kusavapo kwekuremara kwakadai sekutsemuka nemapinho.
Insulation: Foam ye polyurethane inofanira kuva ne thermal conductivity yeIri pasi pe kana kuenzana ne 0.024 W/(m·K), density ye Huru pane kana kuenzana ne 60 kg/m³, uye simba rekumanikidzira reKupfuura kana kuenzana ne0.3 MPa.
Pipe Yekunze: Yepamusoro-density polyethylene (HDPE) ine simba rekusimba reKupfuura kana kuenzana ne20 MPa uye kureba panguva yekupwanya Kupfuura kana kuenzana ne350% kuti ive nechokwadi chekukanganisa uye kusaita ngura.
Zvishandiso zvinofanirwa kupihwa chitupa chekuenderana uye mushumo webvunzo paunosvika, uye ongororo yekuona inofanirwa kuitwa. Chero kukuvara, deformation, kana kumwe kukanganisa kunofanirwa kurambidzwa kushandiswa.
II. Kugadzirira Kuvaka
Saiti Survey: Isati yavakwa, nzira yepombi, kudzika kwekuvigwa, uye mamiriro evhu anofanirwa kuongororwa kuti ive nechokwadi chekutevedzera zvinodiwa nedhizaini. Kucherwa kweMugero: Mugero wepombi dzesimbi{1} dzakavigwa insulated simbi dzinofanira kuenderana ne "GB 50268-2008 Specification for Construction and Acceptance of Water Supply and Drainage Pipeline Projects." Pasi pemugero panofanira kuva sandara uye pasina matombo anopinza. Iyo yakanaka jecha cushion layer (ukobvu Hukuru kupfuura kana kuenzana ne100 mm) inofanira kuiswa kana zvichidikanwa.
Pipeline Prefabrication: Pombi dzesimbi dzakaiswa insulation dzinofanira kugadzirwa mufekitari kana kuti{0}}panzvimbo kuitira kuti pave nechokwadi chekunyatsokwana pakati pechidzitiro nepombi yesimbi, isina maburi kana makatsemuka.
III. Installation Process Standards
Pipeline Welding: Argon arc welding kana yemagetsi arc welding inofanira kushandiswa. Welds anofanirwa kuongororwa 100% nekuona uye kusiri-kuongororwa zvinoparadza (seX-ray kana ultrasonic testing) kuti ive nechokwadi chekutevedzera "GB/T 12467-2018 Radiography yeFusion Welded Joints of Metallic Materials" chiyero.
Insulation Layer Installation: Iyo polyurethane foam insulation layer inofanira kunge ine furo mukati-situ kuitira kuti pave nefuro rakafanana, risina kupera uye kuputika. Iyo yekunze casing uye insulation layer inofanirwa kusungirirwa zvakasimba kudzivirira kupinda kwemvura. Interface Kurapa: Iyo insulation layer pakubatanidzwa kwepombi (senge flanges uye welded majoini) inofanira kuramba ichienderera. Majoini anofanirwa kuvharwa nezvinhu zvekunamira zvine hunyanzvi (sekunamira kwepolyurethane kana rabha-tepi yepurasitiki yekuvharisa) kudzivirira bhiriji rinopisa.
Zvinodiwa Pakudzosera: Kana uchizadza mapombi-akafushirwa, jecha rakatsetseka kana ivhu rakapfava rinofanira kushandiswa mukati me500 mm pamusoro pepombi kudzivirira kusangana kwakananga pakati pezvinhu zvakaomarara nepombi. Ivhu rekumashure rinofanirwa kubatanidzwa ne layer kusvika kune density yeGreater than kana yakaenzana ne95%.
IV. Quality Acceptance Standards
Kutarisisa Kutariswa: Iyo insulation layer inofanira kunge yakatsetseka, isina kukuvara kana kusvuuka, uye casing yekunze inofanira kunge isina mavanga kana deformation.
Thermal Insulation Performance Testing: Shandisa inodziya yekufungidzira kamera kana thermal conductivity tester kuti uone kushanda kwekudzivirira uye kuve nechokwadi kuti inosangana nezvinodiwa zvekugadzira.
Muedzo Wekudzvanya: Mushure mekuisirwa, pombi inofanirwa kuita hydraulic pressure test panguva 1.5 nguva yekushanda. Muedzo wekusadonha mushure memaminitsi makumi matatu ekumanikidzwa kwakasimba kunoonekwa sekugamuchirwa. Corrosion Testing: Kana pombi yesimbi yakaputirwa neanti-yakanamira corrosion (yakadai se3PE kana epoxy powder), detector inobuda mumoto inofanira kushandiswa kuona kuti hapana kuvuza.
V. Chengetedzo uye Zvinodiwa Zvezvakatipoteredza
Kuchengeteka Kwekuvaka: Mabhandi ekuchengetedza anofanirwa kupfekwa kana uchishanda pakakwirira, uye mashedhi anofanirwa kuitwa nematanho ekudzivirira moto kudzivirira kupisa nemoto.
Zvinodiwa Zvenharaunda: Polyurethane furo zvinhu zvinofanirwa kuchengetwa nemazvo kudzivirira kusvibiswa kwezvakatipoteredza nezvinhu zvinoputika, uye tsvina inofanirwa kurongedzwa uye kuraswa zvakasiyana.
Mhedziso
Mamiriro ekuvaka emapombi esimbi akaiswa insulated anosanganisira akawanda maficha, kusanganisira zvinhu, maitiro, uye kuongororwa kwekugamuchirwa. Izvi zvinofanirwa kutevedzwa zvakanyanya kumitemo yenyika uye yeindasitiri kuti ive nechokwadi chekuti-nguva refu, kushanda kwakadzikama kwepombi dzepombi. Kudzora kwemhando uye kuongororwa nguva dzose kunofanirwa kusimbiswa panguva yekuvaka kudzivirira kutadza kuvharidzira kana kukuvadzwa kwepombi nekuda kwekuvaka kusina kunaka, nekudaro kuve nechokwadi chemhando yeprojekiti uye hupenyu hwebasa.
