ASTM SA179 / A179 Seamless Cold -Trawn Tsawg- Carbon Steel Tubes
ASTM A179 (SA179)yog covASME Boiler Code versionntawm cov lus qhia tshwj xeeb rau seamless txias-kos qis- carbon steel tubes tshwj xeeb tsim rauThaum tshav kub kub exchangers thiab condensers. Lub "SA" ua ntej qhia tias nws yog ib qhoASME khoompom zoo siv rau hauv ASME Code kev tsim kho (Tshooj I, Tshooj VIII).
Cov yam ntxwv tseem ceeb
| Feature | Kev piav qhia |
|---|---|
| Khoom siv | Tsawg- Carbon Steel (Tua Hlau) |
| Txheej txheem | Seamless & Txias -Drawn |
| Code xwm txheej | ASME SA179- Pom zoo rau kev tsim lub nkoj siab / boiler |
| Kev siv thawj zaug | Thaum tshav kub kub exchanger & condenser rajnyob rau hauv cov hlab ntsha code |
SA179 vs A179: Qhov txawv
| Yam | ASTM A179 Cov khoom lag luam | ASME SA179 |
|---|---|---|
| Lub npe | ASTM tus qauv | ASME Code cov ntaub ntawv |
| Raws li txoj cai | Kev lag luam tus qauv | Code- pom zoorau kev tsim kho |
| Kev siv | Kev lag luam kub exchangers | Siab hlab ntsha & boilersrau ASME |
| Cov ntaub ntawv | Standard MTC | Cov ntaub ntawv Codexav tau |
| Stamps | Tsis siv tau | U, S, PP, thiab lwm yam.stamp ua tau |
Lub ntsiab lus tseem ceeb:SA179 yogzoo tib yam chemically thiab mechanicallymus rau A179, tab sis nqakev pom zoo coderau kev tswj xyuas kev tsim kho.
Tshuaj muaj pes tsawg leeg
| Element | Kev sib xyaw (%) |
|---|---|
| Cov pa roj carbon (C) | 0.06 - 0.18 |
| Manganese (Mn) | 0.27 - 0.63 |
| Phosphorus (P), max | 0.035 |
| Sulfur (S), max | 0.035 |
| Silicon (Si) | ≥ 0.13 (Deoxidized / tua hlau) |
Mechanical Properties
| Khoom | Kev xav tau |
|---|---|
| Tensile zog, min | 325 MPa (47,000 psi) |
| Yield zog, min | 180 MPa (26,000 psi) |
| Elongation, min | 35% |
| Hardness, max | 72 PAB |
ASME Code Applications
Ntu VIII - Lub Hwj Chim Siab:
Thaum tshav kub kub exchanger tubeshauv U-stamped nkoj
Condenser tubeshauv coded systems
Reboiler raj
Cov kav dej txiashauv cov txheej txheem nkoj
Tshooj I - Fais Fab Boilers:
Economizer tubes
Tsawg-kub kub rov qab raj
Auxiliary heat exchanger tubes
Hom Code References:
UG-10:Txais cov ntaub ntawv SA
Ntu UHT:Kev xav tau rau cov khoom siv cua sov- kho
Table UHA-23:Tso cai rau kev ntxhov siab rau SA179
Kev tsim khoom rau kev ua raws cai
Cov Lus Qhia Ntxiv rau SA179:
ASME{0}} pom zoo zeb(Tuav daim ntawv pov thawj ASME tsim nyog)
Cov ntaub ntawv xeem cov ntaub ntawvnrog ASME npe
Traceabilitykhaws cia los ntawm fabrication
Cov txheej txheem vuamTsim nyog rau ASME Tshooj IX
NDE rau Code yuav tsum tau
Cov txiaj ntsig ntawm kev kos duab txias (rau kev hloov cua sov):
Smooth nto tiav(zoo dua tshav kub hloov)
Yam tsawg kawg nkaus(txheej txheem raj-rau-tubesheet haum)
Txhim kho cov khoom siv kho tshuab
Kev Ntsuam Xyuas & Kev Tshawb Fawb (Code Requirements)
| Kuaj | Kev xav tau | Code Reference |
|---|---|---|
| Hydrostatic Test | Yuav tsum tau | UG-99, UG-100 |
| Flattening Test | Yuav tsum tau | SA179 specification |
| Flaring Test | Yuav tsum tau | SA179 specification |
| Hardness Test | Optional (yog tias muaj) | - |
| Cov ntaub ntawv pov thawj | ASME Form | Tshooj II, Ntu D |
Hydrostatic Test Siab (Code Yam Tsawg):
ntawv nyeem
P=1.5 × MAWP × (S_T / S_D) Tab sis tsis tsawg tshaj qhov tshwj xeeb yam tsawg kawg nkaus (feem ntau 1000 psi)
Cov ntawv thov hauv cov khoom siv Coded
Kev lag luam fais fab:
Nto condenser(ASME Tshooj III lossis Tshooj VIII)
Feedwater rhaub(U- stamped)
Kaw txias cua sov exchangers
Auxiliary coolershauv nuclear / fais fab nroj tsuag
Petrochemical:
Plhaub & raj kub exchangers(U- stamped)
Cov txheej txheem txiasnyob rau hauv cov hlab ntsha coded
Reboilersnyob rau hauv distillation kab
HVAC & tub yees:
Chiller pob khoomhauv cov hlab ntsha siab
Thaum tshav kub kub rov qab unitsrooj sib tham code
Ordering rau Code Projects
Qhov tseem ceeb Specifications:
ntawv nyeem
ASME SA179 Tubes [Dimensions: OD × Phab Ntsa × Ntev] [Txhim Kho: Raws li- kos lossis annealed] [Rau ASME Tshooj [I/VIII] kev tsim kho] [Certification: ASME Material Test Report yuav tsum]
Piv txwv kev yuav khoom:
ntawv nyeem
ASME SA179 Tubes 19.05 mm OD × 2.11 mm Phab ntsa × 6,000 mm Length Annealed condition For U-stamped heat exchanger per Section VIII, Div. 1 Full ASME MTR with traceability
Code Allowable Stresses
Los ntawm ASME Tshooj II, Ntu D:
| Kub (° F) | Tso cai Stress (psi) |
|---|---|
| 100 | 11,700 |
| 200 | 11,700 |
| 300 | 11,700 |
| 400 | 11,300 |
| 500 | 10,600 |
| 600 | 9,700 |
Nco tseg:Tsawg dua A106 vim muaj qhov sib txawv ntawm daim ntawv thov tsom xam (kub hloov pauv vs siab piping).
Fabrication Requirements
Tube-rau-Tubesheet Joints (Code):
Rolling / nthuav dav:Raws li TEMA cov qauv
Vuam:Yuav tsum muaj cov txheej txheem tsim nyog (ASME Tshooj IX)
Lub zog welding:Tej zaum yuav xav tau PWHT
Kev kuaj pom dej:Raws li txoj cai Code
U-Bend Requirements:
Yam tsawg kawg nkaus khoov radius:Feem ntau 1.5 × OD
Kev kho cua sov tom qab khoovyog tias tsim nyog
Kev tshuaj xyuas tshwj xeebntawm khoov seem
⚠️ Cov ntsiab lus tseem ceeb ntawm Kev Ua Raws Cai
Rau ASME Stamped Vessels:
Yuav tsum siv SA179(tsis yog A179) rau kev tsim qauv
Tus neeg yuav khoom yuav tsum yog ASME{0}} ntawv pov thawjrau cov khoom siv
Cov ntaub ntawv xeem cov ntaub ntawvyuav tsum qhia SA lub npe
Traceabilityyuav tsum tau khaws cia rau lub nkoj zaum kawg
Common Code Violations:
Siv cov khoom lag luam A179 hauv cov hlab ntsha coded
Txais tus qauv MTC hloov ASME MTR
Poob cov ntaub ntawv traceability thaum fabrication
Tsis ua raws li cov txheej txheem welding
Cov ntaub ntawv zoo
ASME Daim Ntawv Qhia Txog Cov Khoom Siv yuav tsum suav nrog:
SIB 179npe
Kub naj npawbtraceability
Tshuaj ntsuam xyuas
Mechanical test results
Kev kho cua sovcov ntaub ntawv (yog tias tsim nyog)
Chaw tsim tshuaj paus ASME daim ntawv pov thawj naj npawb
Nqe lus hais txog kev ua raws cainrog ASME Tshooj II
International Code sib npaug
| Thaj tsam | Code Standard | Cov khoom sib npaug |
|---|---|---|
| Teb chaws Europe | TS EN 13445 / PE | P195GH |
| Nyiv | TIAB SA 8265 | SWB 340 |
| Canada | CSA B51 | SIB 179 |
| Tuam Tshoj | GB 150 | 20G |
Kev txiav txim siab nqi
Hwm rau SA vs A:
Khoom siv:10-20% siab dua rau SA179
Cov ntaub ntawv:Tus nqi ntxiv rau ASME MTR
Traceability:Cov kev cai nruj dua ua rau tus nqi nce
Tus nqi:Yuav tsum tau ua raws li txoj cai - tsis xaiv tau
Thaum SA179 Yuav Tsum Tau:
ASME -stamped siab hlab ntsha
Sau npe boilers
Kev cai lij choj raws cai
Cov neeg siv khoom specificationsrau kev ua raws cai
Insurance xav tau
Kho & Re-tubing
Rau cov khoom siv Coded:
Hloov cov rajkuj yuav tsum yog SA179
Cov txheej txheem vuamyuav tsum rov- tsim nyog yog hloov
Tom qab- tshuaj xyuas khorau tus lej qub
Cov ntaub ntawv tshaj tawm tshiabxav tau
Service Life in Code Service:
Yam:15-25 xyoo nyob rau hauv cov txheej txheem zoo
Hloov cov qauv:Raws li tus qauv tsim tshwj xeeb
Lub sijhawm tshuaj xyuas:Raws li txoj cai lij choj
Hauv cov ntsiab lus: ASME SA179 yog tus lej - pom zoo versionntawm A179 seamless txias- kos cov raj rau cov cua sov thiab cov condensers hauvASME siab nkoj thiab boiler tsim. Thaum chemically thiab mechanically zoo tib yam rau ASTM A179, lubKev xaiv SA yog qhov tseem ceeb ntawm txoj cairau kev ua raws li txoj cai, yuav tsum tau ASME - ntawv pov thawj kev tsim khoom, cov ntaub ntawv, thiab traceability. Rau cov ntawv tsis yog -code daim ntawv thov, A179 txaus, tab sis rau cov khoom siv siab,SA179 yog qhov yuav tsum tau ua.
