Machubu a ASTM A334 ndi machubu a kaboni ndi aloyi zitsulo opangidwa kuti azigwiritsidwa ntchito kutentha pang'ono ndipo amapangidwa pogwiritsa ntchito njira zopanda msoko komanso zowotcherera.
Kukula kwina kwazinthu mwina sikungapezeke motsatira izi chifukwa makulidwe olemera a makoma amakhala ndi zotsatira zoyipa pamatenthedwe otsika.
Gulu la Maphunziro
ASTM A334 ili ndi magiredi angapo amitundu yotsika yotsika.
Grade 1, Grade 3, Grade 6, Grade 7, Grade 8, Grade 9, ndi Giredi 11.
Magiredi ogwirizana amachubu achitsulo a alloy ndi Giredi 3, Grade 7, Grade 8, Grade 9, ndi Giredi 11..
Gulu lililonse lachitsulo lili ndi mankhwala ake enieni komanso zofunikira zamakina, komanso njira zoyesera zoyesera zomwe ziyenera kukwaniritsidwa.
Njira Zopangira
Machubu adzapangidwa ndi aopanda msokokapena automatickuwotcherera ndondomekopopanda kuwonjezera zitsulo zodzaza ndi zowotcherera.
Kutentha Chithandizo
Giredi 1, 3, 6, 7, ndi 9
Bweretsani mwachibadwa mwa kutenthetsa kutentha kofanana ndi 1550 °F [845 °C] ndi kuzizira mumpweya kapena m'chipinda chozizira cha ng'anjo yoyendetsedwa ndi mpweya.
Ngati kutentha kuli kofunika, kuyenera kukambirana.
Kwa magiredi apamwambawa a machubu opanda zitsulo okha:
Yatsaninso ndikuwongolera kugwira ntchito kotentha komanso kutentha kwa ntchito yomaliza yomaliza mpaka kutentha komaliza kuyambira 1550 - 1750 °F [845 - 955 ℃] ndi kuziziritsa mu ng'anjo yoyendetsedwa ndi mpweya kuchokera kutentha koyambirira kosachepera 1550 ° F [ 845 °C].
Gulu 8
Sankhani njira zotsatirazi zochizira kutentha.
Woziziritsidwa ndi wokwiya;
Zokhazikika Pawiri komanso Zopsya mtima.
Gulu 11
Kaya muwonjezere machubu a Giredi 11 ndi mgwirizano pakati pa wogula ndi wogulitsa.
Pamene machubu a Giredi 11 atsekeredwa adzasinthidwa kukhala 1400 - 1600℉[760 - 870 °C].
ASTM A334 Chemical Composition
Pazitsulo za Giredi 1 kapena Grade 6, sizololedwa kupereka magiredi alloying pazinthu zilizonse kupatula zomwe zimafunikira.Komabe, amaloledwa kuwonjezera zinthu zofunika pa deoxidation wa chitsulo.
Mayeso a Makina a ASTM A334
Zofunikira zamakina sizigwira ntchito pamachubu ang'onoang'ono kuposa 1/8 in. [3.2 mm] m'mimba mwake kunja komanso okhala ndi khoma lozama pansi pa 0.015 [0.4 mm].
1. Katundu Wokhazikika
Kutalikirana kocheperako kumawerengeredwa pakuchepetsako kwa khoma ndi mainchesi 1/32 [0.80 mm]:
Pamachubu ang'onoang'ono kuposa 1/2 in. [12.7 mm] m'mimba mwake, miyeso ya elongation yoperekedwa pamizere iyenera kugwiritsidwa ntchito.
2. Mayeso a Impact
Sankhani kutentha koyenera ndi mphamvu yofananira nayo kutengera kalasi ndi makulidwe a khoma.
Mphamvu Zamphamvu
Impact Kutentha
| Gulu | Kutentha kwa Impact | |
| ℉ | ℃ | |
| Gulu 1 | -50 | -45 |
| Gulu 3 | -150 | -100 |
| Gulu 6 | -50 | -45 |
| Gulu 7 | -100 | -75 |
| Gulu 8 | -320 | -195 |
| Gulu 9 | -100 | -75 |
3. Mayeso Olimba
| Gulu | Rockwell | Brinell |
| Gulu 1 | b85 ndi | 163 |
| Gulu 3 | b90 ndi | 190 |
| Gulu 6 | b90 ndi | 190 |
| Gulu 7 | b90 ndi | 190 |
| Gulu 8 | - | - |
| Gulu 11 | b90 ndi | 190 |
4. Flattening Mayeso
Kuyesa kumodzi kosalala kumapangidwa pazitsanzo kuchokera kumapeto kwa chubu limodzi lomalizidwa pagawo lililonse koma osati lomwe limagwiritsidwa ntchito poyesa flare kapena flange.
5. Kuyesa kwa Flare (Machubu Opanda Msoko)
Kuyesa kwamoto kumodzi kumapangidwa pazitsanzo kuchokera kumapeto kwa chubu limodzi lomalizidwa pagawo lililonse, koma osati lomwe limagwiritsidwa ntchito poyesa kusalala.
6. Flange Test (Welded Tubes)
Chiyeso chimodzi cha flange chiyenera kupangidwa pazitsanzo kuchokera kumapeto kwa chubu limodzi lomalizidwa pagawo lililonse, koma osati lomwe limagwiritsidwa ntchito poyesa kusalala.
7. Reverse Flattening Test
Pa machubu owotcherera, kuyesa kumodzi kokhotakhota kumapangidwa pachitsanzo kuchokera pamamita 460 aliwonse a chubu chomalizidwa.
Mayeso a Hydrostatic kapena Nondestructive Electric
Chitoliro chilichonse chiziyesedwa mopanda kuwononga magetsi kapena kuyesedwa mwa hydrostatically molingana ndi Specification A1016/A1016M.
Mapulogalamu a ASTM A334 Steel Pipe
Amagwiritsidwa ntchito kunyamula zamadzimadzi kapena mpweya monga gasi, mafuta, ndi mankhwala ena potentha kwambiri.
1. Cryogenic mapaipi machitidwe: Amagwiritsidwa ntchito popanga mapaipi oyendetsa madzi a cryogenic (monga gasi wachilengedwe, nayitrogeni wamadzimadzi).Chifukwa cha zinthu zake zabwino kwambiri za cryogenic, zimatha kukhalabe ndi mphamvu zamakina komanso kulimba pakutentha kwambiri.
2. Zosinthana kutentha ndi ma condenser: Osinthanitsa kutentha ndi ma condensers amatha kugwiritsidwa ntchito bwino kuziziritsa kapena kutenthetsa media, makamaka m'mafakitale amafuta ndi petrochemical.
3. Zotengera zokakamiza: Itha kugwiritsidwanso ntchito kupanga zotengera zokakamiza zopangidwira ntchito za cryogenic.Zombozi zitha kugwiritsidwa ntchito kusunga mankhwala a cryogenic kapena njira zapadera zamafakitale.
4. Refrigeration systems ndi zipangizo: Machubuwa amagwiritsidwa ntchito ponyamula mafiriji, makamaka pomwe pakufunika zida zothana ndi kutentha pang'ono.
ASTM A334 Equivalent Standard
EN 10216-4: Imakwirira machubu achitsulo osapangidwa ndi alloyed komanso alloyed, omwe afotokoza za kutentha kochepa.
Chithunzi cha JIS G3460: ikugwirizana ndi machubu achitsulo a aloyi a ntchito ya cryogenic.
GB/T 18984: imagwira ntchito pamachubu achitsulo osasunthika a zotengera zokakamiza za cryogenic.Imatchula mwatsatanetsatane mapangidwe ndi kupanga machubu achitsulo oyenera kumadera otentha kwambiri.
Ngakhale kuti miyezoyi ingasiyane mwatsatanetsatane ndi zofunikira zenizeni, zimakhala zofanana ndi cholinga chawo chonse ndi ntchito, zomwe ndi kuonetsetsa kuti chitetezo ndi ntchito ya mapaipi achitsulo m'madera a cryogenic.
Zathu Zogwirizana
Chiyambireni kukhazikitsidwa mu 2014, Botop Steel yakhala ikugulitsa chitoliro chachitsulo cha carbon ku Northern China, chomwe chimadziwika ndi ntchito zabwino kwambiri, zinthu zamtengo wapatali, komanso zothetsera mavuto.
Kampaniyi imapereka mapaipi osiyanasiyana a zitsulo za carbon ndi zinthu zomwe zimagwirizana nazo, kuphatikizapo zopanda msoko, ERW, LSAW, ndi chitoliro chachitsulo cha SSAW, komanso mzere wathunthu wazitsulo ndi flanges.Zopangira zake zapadera zimaphatikizanso ma alloys apamwamba kwambiri ndi zitsulo zosapanga dzimbiri za austenitic, zopangidwa kuti zikwaniritse zofunikira zama projekiti osiyanasiyana a mapaipi.
Tags: ASTM A334, chitoliro cha chitsulo cha carbon, astm a334 gr 6, astm a334 gr 1.
Nthawi yotumiza: May-20-2024