Kauv Welded Steel Yeeb Nkab Rau Underground Natural Gas Pipe
Qhia:
Cov raj xa hluav taws xob hauv av ua lub luag haujlwm tseem ceeb hauv kev xa cov peev txheej muaj nuj nqis no rau tsev, kev lag luam thiab kev lag luam.Txhawm rau kom muaj kev nyab xeeb thiab ua haujlwm ntawm cov kav dej no, nws yog ib qho tseem ceeb uas yuav tsum tau siv cov ntaub ntawv raug thiab vuam txheej txheem thaum tsim kho.Peb yuav tshawb nrhiav qhov tseem ceeb ntawm cov kav hlau welded steel yeeb nkab thiab qhov tseem ceeb ntawm kev ua raws li cov txheej txheem vuam zoo thaum ua haujlwm nrogunderground natural gas pipe.
Spiral welded yeeb nkab:
Kauv welded yeeb nkab yog nrov nyob rau hauv kev tsim kho ntawm underground natural gas pipelines vim nws lub cev muaj zog thiab durability.Cov kav dej no yog tsim los ntawm kev khoov ib txoj hlua txuas ntxiv ntawm cov hlau mus rau hauv ib lub voj voog thiab tom qab ntawd vuam nws raws cov seams.Qhov tshwm sim yog cov kav dej uas muaj zog, kaw cov pob qij txha uas tuaj yeem tiv taus qhov tseem ceeb sab nraud thiab hloov mus rau hauv av txav.Qhov kev tsim tshwj xeeb no ua raukauv welded steel yeeb nkabzoo tagnrho rau cov kav dej hauv av uas muaj kev ruaj ntseg tseem ceeb heev.
Mechanical Property
| Qib A | Qib B | Qib C | Qib D | Qib E | |
| Yield zog, min, Mpa (KSI) | 330 (48) hnub | 415(60) | 415(60) | 415(60) | 445(66) |
| Tensile zog, min, Mpa (KSI) | 205(30) | 240(35) | 290 (42) hnub | 315 (46) hnub | 360(52) |
Tshuaj muaj pes tsawg leeg
| Element | Kev sib xyaw, Max,% | ||||
| Qib A | Qib B | Qib C | Qib D | Qib E | |
| Cov pa roj carbon | 0.25 | 0.26 | 0.28 ib | 0.30 Nws | 0.30 Nws |
| Manganese | 1.00 Nws | 1.00 Nws | 1.20 | 1.30 Nws | 1.40 Nws |
| Phosphorus | 0.035 ib | 0.035 ib | 0.035 ib | 0.035 ib | 0.035 ib |
| Sulfur | 0.035 ib | 0.035 ib | 0.035 ib | 0.035 ib | 0.035 ib |
Hydrostatic Test
Txhua qhov ntev ntawm cov yeeb nkab yuav tsum raug kuaj los ntawm cov chaw tsim khoom mus rau lub siab hydrostatic uas yuav tsim nyob rau hauv cov yeeb nkab phab ntsa ib qho kev ntxhov siab tsis pub tsawg tshaj 60% ntawm qhov tsawg kawg nkaus yield zog ntawm chav tsev kub.Lub siab yuav tsum tau txiav txim los ntawm qhov sib npaug hauv qab no:
P = 2st/D
Permissible variations In Weights and Dimensions
Txhua qhov ntev ntawm cov yeeb nkab yuav tsum tau hnyav nyias thiab nws qhov hnyav yuav tsum tsis txhob sib txawv ntau dua 10% tshaj lossis 5.5% raws li nws qhov hnyav, suav nrog nws qhov ntev thiab nws qhov hnyav ntawm ib chav tsev ntev.
Sab nraud txoj kab uas hla yuav tsum tsis txhob sib txawv ntau tshaj ± 1% ntawm lub npe nominal sab nraud txoj kab uas hla.
Phab ntsa thickness ntawm txhua qhov chaw yuav tsum tsis pub ntau tshaj 12.5% raws li cov phab ntsa thickness.
Ntev
Ib qho random ntev: 16 txog 25ft (4.88 txog 7.62m)
Ob chav random ntev: tshaj 25ft txog 35ft (7.62 txog 10.67m)
Uniform lengths: permissible variation ± 1in
Xaus
Cov yeeb nkab yuav tsum tau muab tso rau hauv qhov xaus, thiab cov burrs ntawm qhov kawg yuav raug tshem tawm.
Thaum cov yeeb nkab kawg tau teev tseg rau bevel xaus, lub kaum sab xis yuav tsum yog 30 txog 35 degree
Cov txheej txheem welding yeeb nkab:
Tsim nyogcov txheej txheem weldingyog qhov tseem ceeb rau kev ua haujlwm ntev thiab kev nyab xeeb ntawm cov kav dej hauv av ntuj.Nov yog qee qhov tseem ceeb uas yuav tsum xav txog:
1. Welder txuj ci:Cov kws tsim nyog thiab cov kws paub txog kev siv vuam yuav tsum raug ntiav, kom ntseeg tau tias lawv muaj cov ntawv pov thawj tsim nyog thiab kev txawj ntse los tswj cov txheej txheem vuam tshwj xeeb uas yuav tsum tau muaj rau cov raj xa hluav taws xob.Qhov no yuav pab txo qhov kev pheej hmoo ntawm vuam tsis xws luag thiab muaj peev xwm xau.
2. Kev npaj thiab kev sib koom ua ke:Kev npaj sib koom ua ke yog qhov tseem ceeb ua ntej vuam.Qhov no suav nrog tshem tawm cov av, cov khib nyiab lossis cov kab mob uas tuaj yeem cuam tshuam rau kev ncaj ncees ntawm vuam.Tsis tas li ntawd, beveling cov yeeb nkab npoo pab tsim kom muaj zog welded sib koom ua ke.
3. Vuam cov txheej txheem thiab cov kev txwv:Cov txheej txheem vuam kom raug thiab cov kev ntsuas yuav tsum tau ua kom tau txais cov khoom zoo welds.Cov txheej txheem vuam yuav tsum xav txog yam xws li cov yeeb nkab thickness, vuam txoj hauj lwm, roj muaj pes tsawg leeg, thiab lwm yam. Nws raug nquahu kom siv cov txheej txheem vuam xws li roj hlau arc vuam (GMAW) lossis submerged arc vuam (SAW) kom ntseeg tau cov txiaj ntsig zoo ib yam thiab txo qis tib neeg. yuam kev.
4. Kev Tshawb Fawb thiab Kev Ntsuas:Kev tshuaj xyuas zoo thiab kev sim ntawm cov vuam yog qhov tseem ceeb kom paub meej tias nws qhov zoo thiab kev ncaj ncees.Cov thev naus laus zis xws li kev sim tsis muaj kev puas tsuaj (NDT), suav nrog X-ray lossis kuaj ultrasonic, tuaj yeem kuaj xyuas txhua qhov tsis xws luag uas tuaj yeem cuam tshuam qhov kev ntseeg tau ntev ntawm cov kav dej.
Hauv kev xaus:
Kev tsim kho cov kav dej hauv av uas siv cov kav hlau welded steel yeeb nkab yuav tsum ua raws li cov txheej txheem vuam zoo.Los ntawm ntiav cov kws tsim nyog welders, ua tib zoo npaj cov pob qij txha, ua raws li cov txheej txheem vuam kom zoo, thiab ua tiav kev tshuaj xyuas, peb tuaj yeem ua kom muaj kev nyab xeeb, ua haujlwm ntev, thiab ua haujlwm ntawm cov kav dej no.Los ntawm kev ua tib zoo saib xyuas kom meej hauv cov txheej txheem vuam, peb tuaj yeem ntseeg siab xa cov pa roj carbon monoxide kom ua tau raws li cov kev xav tau ntawm peb cov zej zog thaum tseem ceeb rau kev noj qab haus huv ib puag ncig thiab kev nyab xeeb rau pej xeem.
