Nkag siab txog cov txiaj ntsig ntawm ASTM A139 Kauv Hlau Yeeb Nkab rau Underground Natural Gas Pipelines

Qhia:

Thaum nws los txog rau kev thauj mus los ntawm cov roj av, qhov tseem ceeb ntawm cov kav dej hauv av tsis tuaj yeem hais dhau los.Cov kav dej no ua kom muaj kev nyab xeeb thiab muaj txiaj ntsig ntawm lub zog tseem ceeb no rau cov tsev, kev lag luam thiab kev lag luam.Txhawm rau kom lub neej ntev, kev cia siab thiab kev ua haujlwm ntawm cov kav dej no, kev siv cov khoom zoo yog qhov tseem ceeb heev.Ntawm ntau qhov kev xaiv muaj,ASTM A139 Cov khoom lag luamkauv steel yeeb nkab sawv tawm raws li kev xaiv tshwj xeeb.Hauv qhov blog no, peb yuav dhia mus rau hauv cov yam ntxwv thiab cov txiaj ntsig uas ua rau ASTM A139 cov khoom xaiv rau cov kav dej hauv av.

Mechanical Property

Tshuaj muaj pes tsawg leeg

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

ASTM A139: Kev xaiv ntawmUnderground Natural Gas Pipekab:

1. Lub zog thiab kav ntev:

ASTM A139 Cov khoom lag luamkauv steel yeeb nkabyog lub npe hu rau nws zoo heev tensile thiab cuam tshuam lub zog.Cov kev zoo no yog qhov tseem ceeb rau cov kav dej hauv av hauv av vim tias lawv raug cuam tshuam los ntawm ntau yam ntawm ib puag ncig thiab hauv av siab.Lub kauv tsim ntawm cov yeeb nkab steel txhim kho nws cov qauv kev ncaj ncees, tso cai rau nws tiv taus cov kev kub ntxhov sab nraud thiab txo qhov kev pheej hmoo ntawm kev tawg lossis tawg.

2. Corrosion kuj:

Cov kav dej hauv av muaj kev cuam tshuam rau corrosion los ntawm dej, av tshuaj thiab lwm yam.ASTM A139 kauv steel yeeb nkab daws qhov teeb meem no los ntawm kev muab kev tiv thaiv corrosion zoo dua.Qhov no feem ntau yog vim nws cov zinc-nplua nuj txheej, uas muab kev tiv thaiv kev tiv thaiv tiv thaiv cov ntsiab lus corrosive, ua kom cov yeeb nkab ntev ntev thiab txo qhov kev xav tau ntawm kev tu lossis hloov.

3. Weldability thiab versatility:

ASTM A139 kauv steel yeeb nkab muaj qhov zoo tshaj plaws weldability, tso cai rau cov pob qij txha du, ua haujlwm zoo thaum lub sijhawm teeb tsa.Qhov no feature yog tshwj xeeb tshaj yog pab tau rauunderground natural gas pipes, raws li nws ua kom muaj kev ncaj ncees ntawm cov raj xa dej thiab txo qhov kev pheej hmoo ntawm kev xau.Tsis tas li ntawd, qhov ntau yam ntawm kauv steel yeeb nkab tso cai rau nws yooj yim tsim nyob rau hauv ntau qhov ntev thiab txoj kab uas hla kom tau raws li qhov kev xav tau sib txawv, yog li pab them nqi thiab kev hloov kho.

4. Tus nqi-zoo:

Lwm qhov txiaj ntsig tseem ceeb ntawm kev siv ASTM A139 kauv steel yeeb nkab rau cov kav dej hauv av yog nws cov txiaj ntsig zoo.Cov khoom siv ua haujlwm ntev, kev tiv thaiv corrosion thiab yooj yim ntawm kev teeb tsa txo cov nqi tu thiab hloov mus ntev.Tsis tas li ntawd, nws lub zog-rau-qhov hnyav piv txo qhov kev xav tau ntawm cov qauv kev txhawb nqa dav dav thaum lub sijhawm teeb tsa, ua rau tag nrho cov nqi txuag.

5. Kev xav txog ib puag ncig:

ASTM A139 kauv steel yeeb nkab yog tsim los siv cov txheej txheem ib puag ncig thiab ua raws li cov qauv kev nyab xeeb nruj.Nws cov khoom tiv thaiv corrosion pab tiv thaiv cov pa paug, thaum kawg txo qhov cuam tshuam ib puag ncig.Tsis tas li ntawd, cov hlau yuav rov ua dua tshiab ua rau nws yog ib qho kev xaiv zoo rau ib puag ncig, hais ntxiv txog cov txiaj ntsig zoo ntawm kev siv ASTM A139 kauv steel yeeb nkab rau cov kav dej hauv av.

Hauv kev xaus:

Xaiv cov ntaub ntawv tsim nyog rau cov kav xa hluav taws xob hauv av yog qhov tseem ceeb los ua kom muaj kev nyab xeeb, muaj txiaj ntsig thiab txhim kho kev thauj mus los ntawm lub zog muaj txiaj ntsig.ASTM A139 kauv steel yeeb nkab yog ib qho kev xaiv zoo heev vim nws lub zog, ruaj khov, corrosion kuj, weldability, nqi-zoo, thiab ib puag ncig kev xav.Nws cov khoom tshwj xeeb ua rau nws yog thawj qhov kev xaiv rau engineers thiab project managers tab tom nrhiav los tsim underground natural gas pipelines uas yuav sawv qhov kev xeem ntawm lub sij hawm.Los ntawm kev nqis peev hauv cov ntaub ntawv zoo xws li ASTM A139 kauv steel yeeb nkab, peb tuaj yeem ua kom muaj kev nyab xeeb thiab nyab xeeb ntawm cov khoom siv hluav taws xob rau ntau tiam neeg.