Ubwino wa Mapaipi Achitsulo a A252 Giredi 3 Omwe Amagwiritsidwa Ntchito Pomanga Mipopi ya Sewer ndi Petroleum Pipeline

Kufotokozera Kwachidule:

Chitoliro chachitsulo cha A252 Grade 3, chomwe chimadziwikanso kutichitoliro cha arc chozungulira, ndi chisankho chodziwika bwino pakupanga mapaipi otayira ndi mafuta.Mapaipi awa adapangidwa kuti athe kupirira mikhalidwe yovuta kwambiri ndipo amapereka zabwino zambiri pazogwiritsa ntchito izi.


Tsatanetsatane wa Zamalonda

Zolemba Zamalonda

Chimodzi mwamaubwino ofunikira aA252 Gulu 3 chitoliro chachitsulo ndi mphamvu zake zapadera komanso kulimba kwake.Mapaipiwa amapangidwa ndi chitsulo chapamwamba kwambiri ndipo amalimbana kwambiri ndi dzimbiri, kuvala komanso kukhudzidwa.Izi zimawapangitsa kukhala abwino kuti azigwiritsidwa ntchito m'mapaipi otayira momwe angayankhidwe ndi zinthu zowononga komanso katundu wolemera.Kuphatikiza apo, mphamvu zawo ndi kulimba kwawo zimawapangitsa kukhala oyenera kugwiritsidwa ntchito popanga mapaipi amafuta, chifukwa amayenera kupirira zovuta komanso kusintha kwa chilengedwe.

Standard  Kalasi yachitsulo Zamankhwala (%) Tensile Property Charpy(V notch)

Mayeso a Impact

c Mn p s Si Zina Zokolola Mphamvu(Mpa) Kulimba kwamakokedwe(Mpa) (L0 = 5.65 √ S0 (mphindi Wotambasula) (%)
max max max max max min max min max D ≤ 168.33mm D > 168.3mm
  

 

GB/T3091 -2008

Q215A ≤ 0.15 0.25 < 1.20 0.045 0.050 0.35   

Kuwonjezera NbVTi malinga ndi GB/T1591-94

215   335   15 > 31  
Q215B ≤ 0.15 0.25-0.55 0.045 0.045 0.035 215 335 15 > 31
Q235A ≤ 0.22 0.30 < 0.65 0.045 0.050 0.035 235 375 15 > 26
Q235B ≤ 0.20 0.30 ≤ 1.80 0.045 0.045 0.035 235 375 15 > 26
Q295A 0.16 0.80-1.50 0.045 0.045 0.55 295 390 13 > 23
Q295B 0.16 0.80-1.50 0.045 0.040 0.55 295 390 13 > 23
Q345A 0.20 1.00-1.60 0.045 0.045 0.55 345 510 13 > 21
Q345B 0.20 1.00-1.60 0.045 0.040 0.55 345 510 13 > 21
  

 

 

GB/

T9711-

2011

(PSL1)

L175 0.21 0.60 0.030 0.030     

 

Mwasankha kuwonjezera chimodzi mwazinthu za NbVTi kapena kuphatikiza kulikonse

175   310   27  Chimodzi kapena ziwiri za kulimba indexof

mphamvu ya mphamvu ndi kumeta ubweya angasankhidwe.Za

L555, onani muyezo.

L210 0.22 0.90 0.030 0.030 210 335 25
L245 0.26 1.20 0.030 0.030 245 415 21
L290 0.26 1.30 0.030 0.030 290 415 21
L320 0.26 1.40 0.030 0.030 320 435 20
L360 0.26 1.40 0.030 0.030 360 460 19
L390 0.26 1.40 0.030 0.030 390 390 18
L415 0.26 1.40 0.030 0.030 415 520 17
L450 0.26 1.45 0.030 0.030 450 535 17
L485 0.26 1.65 0.030 0.030 485 570 16
  

 

 

API 5L (PSL 1)

A25 0.21 0.60 0.030 0.030    Kwa kalasi B chitsulo,

Nb+V ≤ 0.03%;

kwa zitsulo ≥ kalasi B, kusankha kuwonjezera Nb kapena V kapena awo

kuphatikiza, ndi Nb+V+Ti ≤ 0.15%

172   310    (L0 = 50.8mm) kukhala

kuwerengeredwa molingana ndi formula iyi:

e=1944·A0 .2/U0 .0

A: Dera lachitsanzo mu mm2 U: Mphamvu zocheperako zotchulidwa mu Mpa

 Palibe kapena ayi

kapena onse awiri

zotsatira zake

mphamvu ndi

kumeta ubweya

malo amafunikira ngati muyeso wolimba.

A 0.22 0.90 0.030 0.030   207 331
B 0.26 1.20 0.030 0.030   241 414
x42 0.26 1.30 0.030 0.030   290 414
x46 0.26 1.40 0.030 0.030   317 434
X52 0.26 1.40 0.030 0.030   359 455
x56 0.26 1.40 0.030 0.030   386 490
X60 0.26 1.40 0.030 0.030   414 517
x65 0.26 1.45 0.030 0.030   448 531
X70 0.26 1.65 0.030 0.030   483 565

Ubwino wina wa chitoliro chachitsulo cha A252 Grade 3 ndi kusinthasintha kwake.Mipope imeneyi imapezeka mu makulidwe ndi makulidwe osiyanasiyana, kuwapanga kukhala oyenera ntchito zosiyanasiyana.Kaya kumanga kakang'onochingwe cha sewerokapena chitoliro chachikulu chamafuta, chitoliro chachitsulo cha A252 Grade 3 chikhoza kusinthidwa mosavuta kuti chikwaniritse zofunikira za polojekiti.Kuphatikiza apo, mapaipi awa amatha kupangidwamapaipi opangidwa ndi gawo lopanda kanthu, kukulitsanso ntchito yawo yomanga.

Kuphatikiza pa mphamvu zake komanso kusinthasintha kwake, chitoliro chachitsulo cha A252 Grade 3 chimadziwikanso chifukwa cha mtengo wake.Mapaipiwa ndi osavuta kuyika ndipo amafunikira chisamaliro chochepa, kuchepetsa ndalama zonse za polojekiti.Kuphatikiza apo, moyo wawo wautali wautumiki komanso kukana kwa dzimbiri zimatsimikizira kuti amapereka chiwongola dzanja cholimba pazachuma cha ngalande ndi zimbudzipaipi yamafuta mzerentchito zomanga.

Chithunzi cha SSAW

Ubwino wina wofunikira wa chitoliro chachitsulo cha A252 Grade 3 ndikugwirizana kwake ndi njira zosiyanasiyana zomangira.Mapaipiwa amatha kukhazikitsidwa pogwiritsa ntchito njira zakale zokumba kapena njira zopanda mipanda monga kubowola kopingasa, kubowola kwa chitoliro kapena kuwongolera pang'ono.Kusinthasintha kumeneku kumapangitsa kuti pakhale kukhazikitsa koyenera komanso kopanda mtengo m'malo osiyanasiyana ovuta, kuphatikizapo madera akumidzi, m'mphepete mwa madzi komanso malo okhudzidwa ndi chilengedwe.

Ponseponse, chitoliro chachitsulo cha A252 Grade 3 chimapereka maubwino osiyanasiyana opangira zimbudzi ndi mapaipi amafuta.Mphamvu zawo, kulimba, kusinthasintha komanso kutsika mtengo zimawapangitsa kukhala abwino pazofunikira izi.Kaya amagwiritsidwa ntchito pomanga mapaipi kapena mapaipi amafuta, mapaipiwa amapereka ntchito yodalirika komanso yanthawi yayitali.Zotsatira zake, amakhalabe yankho lachisankho kwa mainjiniya ndi makontrakitala omwe akufunafuna mayankho olimba komanso odalirika a mapaipi.


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