Spot kutengesa kwepamusoro zinc yakavharwa galvanized simbi pombi
Yakagadzikiswa simbi pombi yakakamurwa inotonhora maratisirwa simbi mutopota uye inopisa-dhibha kwakakurudzira simbi pombi. Cold galvanized steel pipe yakarambidzwa, uye iyo yekupedzisira inokurudzirwawo nehurumende kuti ishandiswe kwenguva pfupi. Mumakore ekuma1960 nema1970, nyika dzakasimukira pasi rose dzakatanga kugadzira pombi itsva, uye mapaipi emarara akarambidzwa imwe pashure peimwe. Bazi rezvekuvaka reChina nemamwe mapazi nemakomisheni mana vakabudawo pachena kuti mapaipi emarara akarambidzwa sepombi dzemvura kubva muna 2000. Mapombi ane malata haawanzo kushandiswa mupombi dzemvura inotonhora munharaunda itsva, uye mapaipi emarara anoshandiswa mupombi dzemvura inopisa. mune dzimwe nharaunda. Kupisa dip galvanized simbi pombi inoshandiswa zvakanyanya mukurwisa moto, simba remagetsi uye Expressway. Hot dip galvanized simbi mapaipi anoshandiswa zvakanyanya mukuvaka, michina, migodhi yemarasha, indasitiri yemakemikari, simba remagetsi, njanji mota, indasitiri yemotokari, migwagwa mikuru, mabhiriji, midziyo, zvivakwa zvemitambo, michina yekurima, michina yepetroleum, michina yekuongorora uye mamwe maindasitiri ekugadzira.
Welded simbi pombi ine inopisa-dip kana electro galvanized coating pamusoro pepamusoro pepombi yesimbi. Galvanizing inogona kuwedzera kushora kwepombi dzesimbi uye kuwedzera hupenyu hwavo hwesevhisi. Galvanized pipe inoshandiswa zvakanyanya. Pamusoro pekushandiswa sepombi pombi yekufambisira mvura, gasi, oiri uye zvimwe zvakajairika zvakaderera-kudzvanywa zvinwiwa, inoshandiswawo sepombi yemafuta pombi uye pombi yekufambisa mafuta muindasitiri yepetroleum, kunyanya muminda yemafuta ekumahombekombe, hita yemafuta, condensate inotonhorera. uye marasha distillation mafuta ekugezesa exchanger yemakemikari coking midziyo, trestle pombi murwi, tsigiro furemu pombi yemugero wemugero, etc. Kupisa dip galvanized pombi ndiko kugadzira simbi yakanyungudutswa inobata nesimbi matrix kuti ibudise alloy layer, kuti isanganise matrix uye coating. . Kupisa dip galvanizing ndiko kutora pombi yesimbi kutanga. Kuti ubvise iron oxide pamusoro pepombi yesimbi, mushure mekunhonga, inocheneswa muammonium chloride kana zinc chloride aqueous solution kana ammonium chloride uye zinc chloride yakasanganiswa aqueous solution tank, yozotumirwa kune inopisa dip galvanizing tank. Kupisa dip galvanizing kune zvakanakira kupfeka yunifomu, kunamatira kwakasimba uye hupenyu hurefu hwebasa. Iyo matrix yepombi inopisa-dhip galvanized simbi ine maitiro akaomarara emuviri uye kemikari ine yakanyungudutswa yeplating mhinduro kuti igadzire inodzivirira corrosion zinc ferroalloy layer ine compact chimiro. Iyo alloy layer inosanganiswa neyakachena zinc layer uye simbi pombi matrix, saka ine yakasimba corrosion resistance. Cold galvanized pipe is electro galvanized. Huwandu hwemagalvanized idiki kwazvo, chete 10-50g / m2. Kudzivirirwa kwayo necorrosion kwakasiyana zvakanyanya neiyo inopisa-dip galvanized pipe. Kuti uve nechokwadi chemhando, vazhinji vanogara vakagadzika pombi vanogadzira havashandisi electro galvanizing (kutonhora plating). Iwo chete mabhizinesi madiki ane diki uye midziyo yekare anoshandisa electro galvanizing, hongu, mutengo wavo wakachipa. Bazi rezvekuvaka rakazivisa zviri pamutemo kuti mapombi anotonhora ane tekinoroji yekudzokera kumashure achabviswa uye haazoshandiswa sepombi dzemvura negasi. Iyo galvanized layer yeinotonhora galvanized simbi pombi ndeye electroplating layer, uye zingi layer inoparadzaniswa nesimbi pombi substrate. Iyo zinc layer yakatetepa, uye zinc layer inongobatanidzwa kune simbi pombi matrix, iyo iri nyore kudonha. Naizvozvo, kusaita ngura kwayo hakuna kunaka. Mudzimba itsva, zvinorambidzwa kushandisa mapaipi esimbi anotonhora sepombi dzemvura.
Nominal wall ukobvu (mm): 2.0, 2.5, 2.8, 3.2, 3.5, 3.8, 4.0, 4.5.
Coefficient parameters (c): 1.064, 1.051, 1.045, 1.040, 1.036, 1.034, 1.032, 1.028.
Cherechedza: iyo mechanical property yesimbi indekisi yakakosha yekuita kuti basa rekupedzisira riite (mechanical property) yesimbi, iyo inoenderana nemakemikari ekuumbwa uye kupisa kwekupisa kwesimbi. Muyero yesimbi yepombi, zvinoenderana neyakasiyana sevhisi zvinodiwa, iyo tensile zvivakwa (tensile simba, goho simba kana goho poindi, elongation), kuoma uye kuoma indexes, pamwe nepamusoro uye yakaderera tembiricha zvivakwa zvinodiwa nevashandisi zvinotsanangurwa.
Giredhi resimbi: q215a; Q215B; Q235A; Q235B.
Test pressure value / MPA: d10.2-168.3mm iri 3Mpa; D177.8-323.9mm iri 5MPa
National mwero uye dimension mwero wemarara pombi
GB / t3091-2015 welded simbi pombi nokuda yakaderera kumanikidzwa mvura yekufambisa
Yakarurama musono welded simbi pombi (GB / t13793-2016)
GB / t21835-2008 welded simbi pombi zviyero uye uremu per unit urefu
Kushandiswa kwakajairika kwepombi yakashongedzwa ndeyekuti pombi yesimbi inoshandiswa kugasi uye kudziyisa zvakare inonamira pombi. Sepombi yemvura, galvanized pipe inobudisa yakawanda yehutu mupombi mushure memakore akawanda ekushandiswa. Mvura yero haingosvibisi tsvina yehutsanana chete, asiwo yakasanganiswa nebhakitiriya inobereka pamadziro emukati asina kunaka. Corrosion inokonzera kukwira kwesimbi inorema mumvura uye inoisa hutano hwevanhu panjodzi.
The process flow is as anotevera: black chubhu - alkali washing - water washing - acid pickling - rinsing nemvura yakachena - Leaching additives - drying - hot dip galvanizing - External blowing - internal blowing - air cooling - water cooling - passivation - water rinsing - Inspection - kuyera - warehousing.
1. Mucherechedzo uye kuumbwa kwemakemikari
Giredhi uye kemikari yesimbi yepombi yesimbi yesimbi inofanirwa kuenderana negiredhi uye kemikari yesimbi yepombi nhema inotsanangurwa muGB / t3091.
2. Nzira yekugadzira
Nzira yekugadzira pombi yakasviba (choto welding kana magetsi welding) ichasarudzwa nemugadziri. Kupisa dip galvanizing nzira inogashirwa pakuita galvanizing.
3. Thread and pipe joint
(a) Papombi dzesimbi dzakaiswa galvanized neshinda, tambo dzinofanira kushandurwa mushure mekurudziro. Iyo tambo ichaenderana neYb 822.
(b) Majoini epombi esimbi achaenderana neYb 238; Majoini epombi yesimbi inogoneka achaenderana neYb 230.
4. Mechanical properties iyo mechanic properties yemapombi esimbi isati yaiswa galvanized inofambirana nezvinodiwa zveGB 3091.
5. Kufanana kwemarara ekuputira mapaipi esimbi achaongororwa kuti anoenderana here. Sampu yepombi yesimbi inofanira kuramba ichinyudzwa mucopper sulfate solution ka5 uye haizotsvuka (copper plating color).
6. Kutonhora kwekukotama bvunzo: galvanized simbi pombi ine zita rekuti dhayamita isingapfuuri 50mm ichave pasi pekutonhora kwekukotama bvunzo. Kona yekukotama ndeye 90 °, uye radius yekukotama ndiyo kasere yedhayamita yekunze. Munguva yekuyedzwa pasina filler, weld yemuenzaniso ichaiswa kunze kana kumusoro kwenzvimbo yekukotama. Mushure mebvunzo, sampuli ichave isina kutsemuka uye spalling ye zinc layer.
7. Hydrostatic test iyo hydrostatic test ichaitwa mupombi nhema, kana eddy ikozvino kuona kukanganisa kunogona kushandiswa panzvimbo ye hydrostatic test. Kudzvanywa kwekuyedza kana saizi yekuenzanisa sampuli yeeddy ikozvino kuona kukanganisa kuchaenderana nezvinodiwa zveGB 3092. Iyo mechanical property yesimbi indekisi yakakosha kuti ive nechokwadi chekupedzisira sevhisi kuita (mechanical property) yesimbi,
① Kusimba kwesimba (σ b): iyo yakanyanya simba (FB) inotakurwa nemuenzaniso panguva yekunetsana, yakakamurwa neyepakutanga-chikamu-chikamu nzvimbo (so) yemuenzaniso ((σ), Inonzi tensile simba (σ b) , muN / mm2 (MPA). Inomiririra kugona kwakanyanya kwezvinhu zvesimbi kuramba kukundikana pasi pekukakavadzana. Ipo: FB -- simba guru rinotakurwa nesample kana yatyoka, n (Newton); Saka -- yepakutanga-chikamu-chikamu nzvimbo yemuenzaniso, mm2.
② Goho poindi (σ s) : kune zvigadzirwa zvesimbi zvine chiitiko chegoho, kushushikana kana iyo specimen inogona kuramba ichirebesa pasina kuwedzera (kuramba ichienderera) kushushikana panguva yekusimba, iyo inonzi iyo goho point. Kana kushushikana kukadzikira, mapoinzi epamusoro neakaderera egoho achasiyaniswa. Iyo unit yegoho poindi ndeye n / mm2 (MPA). Yepamusoro yegoho poindi (σ Su): iyo yakanyanya kushushikana kusati kwasvika goho kushushikana kwemuenzaniso kunoderera kwekutanga; Yakaderera goho poindi (σ SL): kushomeka kushushikana muchikamu chegoho kana yekutanga pakarepo mhedzisiro isingatariswe. Ikoko: FS -- goho kushushikana (nguva dzose) yemuenzaniso panguva yekunetsana, n (Newton) saka - yepakutanga-chikamu chechikamu chemuenzaniso, mm2.
③ Kureba mushure mekutyoka: ( σ) Muyedzo yekusimba, chikamu chehurefu chakawedzera nehurefu hwejeji yemuenzaniso mushure mekutyoka kune yepakutanga geji kureba kunonzi kureba. ne σ Yakaratidzwa mu%. Ikoko: L1 -- gauge kureba mushure mekutyora kwemuenzaniso, mm; L0 -- yepakutanga geji kureba kwemuenzaniso, mm.
④ Kuderedzwa kwenzvimbo: (ψ) Muchiyedzo chekugadzirisa, chikamu pakati pekuderedza kuderera kwepamuchinjikwa-sectional nzvimbo pane yakaderedzwa dhayamita uye yepakutanga-chikamu-chikamu nzvimbo mushure memuenzaniso waputsika inonzi kuderedzwa kwenzvimbo. ne ψ Yakaratidzwa mu%. Ikoko: S0 -- yepakutanga muchinjiko-chikamu nzvimbo yemuenzaniso, mm2; S1 -- shoma-muchinjika-chikamu nzvimbo pane yakaderedzwa dhayamita mushure mekutyora kwemuenzaniso, mm2.
⑤ Hardness index: kugona kwesimbi zvinhu kupikisa indentation pamusoro pezvinhu zvakaoma kunonzi kuomarara. Zvinoenderana neyakasiyana nzira dzekuedza uye chiyero chekushandisa, kuomarara kunogona kukamurwa kuita Brinell kuomarara, Rockwell kuomarara, Vickers kuomarara, kuoma kwemahombekombe, microhardness uye yakanyanya kupisa kuoma. Brinell, Rockwell uye Vickers kuomarara kunowanzo shandiswa papombi.
Brinell kuomarara (HB): dzvanya bhora resimbi kana simende bhora recarbide rine imwe dhayamita muchikamu chemuenzaniso neyakatsanangurwa bvunzo simba (f), bvisa simba rekuyedza mushure menguva yakatarwa yekubata, uye kuyera iyo indentation dhayamita (L) pa. muenzaniso wepamusoro. Brinell hardness number ndiyo quotient inowanikwa nekupatsanura simba rekuedza nedenderedzwa repamusoro penzvimbo yekupinza. Inoratidzwa muHBS (bhora resimbi), unit: n / mm2 (MPA).
(1) Carbon; Iyo yakakwirira iyo kabhoni yemukati, iyo yakakwirira kuoma kwesimbi, asi zvakanyanya kuipa kwayo plastiki uye kuoma
(2) Sarufa; Itsvina inokuvadza musimbi. Simbi ine yakakwira sarufa yemukati iri nyore kumisa panguva yekumanikidza kugadzirisa patembiricha yakakwira, iyo inowanzonzi thermal embrittlement.
(3) Phosphorus; Inogona kuderedza zvakanyanya plastiki uye kuoma kwesimbi, kunyanya pakupisa kwakadzika. Chiitiko ichi chinonzi cold brittleness. Musimbi yepamusoro-soro, sarufa uye phosphorus inofanira kunyatsodzorwa. Kune rimwe divi, yakaderera kabhoni simbi ine yakakwira sarufa uye phosphorus, iyo inogona kuita kuti zvive nyore kucheka, izvo zvinobatsira kuvandudza machinability yesimbi.
(4) Manganese; Inogona kuvandudza kusimba kwesimbi, kunetesa uye kubvisa mhedzisiro yakaipa yesarufa, nekuvandudza kuoma kwesimbi. Yakakwira alloy simbi (yakakwira manganese simbi) ine yakakwira manganese yemukati ine yakanaka kupfeka kuramba uye zvimwe zvinhu zvemuviri
(5) Silicon; Inogona kuvandudza kuoma kwesimbi, asi plastiki uye kuoma kunoderera. Simbi yemagetsi ine imwe huwandu hwesilicon, iyo inogona kuvandudza iyo yakapfava magineti maitiro
(6) Tungsten; Inogona kuvandudza kuoma kwakatsvuka uye simba rekupisa kwesimbi, uye kuvandudza kupfeka kusagadzikana kwesimbi
(7) Chromium; Inogona kuvandudza kuomarara uye kupfeka kuramba kwesimbi, uye kuvandudza kusimba kwekuora uye oxidation kuramba kwesimbi.
Kuti uvandudze kushorwa kwepombi yesimbi, iyo yakawanda simbi pombi (black pombi) inogadziriswa. Galvanized simbi pombi yakakamurwa inopisa-dip galvanizing uye yemagetsi simbi zingi. Iyo inopisa-dip galvanizing layer yakakora uye mutengo wemagetsi emagetsi wakaderera, saka kune pombi yesimbi yakabatiswa.
