1. ASTM A671 CC65 Chav Kawm 71 yog dab tsi?
Teb:
ASTM A671 CC65 Chav Kawm 71 qhiahluav taws xob-fusion-welded carbon steel kavrauqis-kev pabcuam kub(hauv qab-65 ° F / -54 ° C).
Qib CC65: Ua kom tswj tau cov chemistry (piv txwv li, carbon Tsawg dua lossis sib npaug li 0.30%, sib npaug Mn / Si).
Chav Kawm 71: DenotesTsawg tshaj tawm lub zog ntawm 71 ksi (490 MPa)thiab cov kev ntsuas siab / phab ntsa thickness.
TxujASTM A671 (rau atmospheric/cryogenic siab hlab ntsha).
2. Kev siv tseem ceeb ntawm Chav Kawm 71 Pipes?
Teb:
Siv nyob rau hauv qhov tseem ceeb ntawm infrastructure:
LNG Terminals: Cryogenic kua thauj.
Petrochemical cog: Ethylene / ammonia pipelines.
Lub zog tiam: Txias- huab cua txias tshuab.
3. Cov Khoom Siv Khoom & Cov Kev Ntsuas Cov Khoom Siv?
Teb:
Impact Toughness: Charpy V-notch tested at-65℃F(yuav tsum tau siv zog nqus tsawg kawg nkaus).
Tensile zog85-110 ksi (586-758 MPa).
Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT)100% radiography (RT) lossis ultrasonic (UT) rau ASTM E164 / E213.
4. Chav Kawm 71 Muab piv rau Chav Kawm 70 li cas?
Teb:
| Parameter | Chav Kawm 71 | Chav Kawm 70 |
|---|---|---|
| Yield zog | 71 ksi (490 MPa) | 70 ksi (483 MPa) |
| Tsim Siab | Siab dua me ntsis | Sib piv |
| Nqi | Marginally kim dua | Zoo sib xws |
5. Fabrication Cov kev coj ua zoo tshaj plaws?
Teb:
Vuam: Siv tsawg-hydrogen electrodes (eg, AWS E7018) nrog preheat (200-300 ° F / 93-149 ° C).
Tshaj tawm -Kev kho cua sov (PWHT): Yuav tsum tau ua kom muaj kev ntxhov siab (ib ASME Sec VIII).
Txheej: Siv epoxy lossis FBE txheej rau corrosion kuj nyob rau hauv ib puag ncig hnyav.
