Taw qhia rau ASTM A53 Txuj
ASTM A53 yog tus qauv tsim los ntawm ASTM International rau seamless thiab welded dub thiab kub -dipped galvanized steel kav. Nws npog cov kav dej nrog cov yeeb nkab nominal (NPS) xws li 1/8 txog 26 (DN 6 txog DN 650), thiab siv tau rau ob qho tib si kev siv tshuab thiab kev siv siab, nrog rau kev siv dav hauv chav dej, dej, roj, thiab cua. Tus qauv faib cov kav dej rau hauv peb hom kev tsim khoom thiab ob qib khoom siv, muab cov txheej txheem kev sib koom ua ke rau kev tsim cov yeeb nkab, tshuaj xyuas, thiab daim ntawv thov.
Cov yam ntxwv tseem ceeb thiab cov ntsiab lus tseem ceeb
Ntau hom kev tsim khoom: Nws suav nrog peb hom: Hom F (lub qhov cub- taub qab-welded, nruam welded), Hom E (hluav taws xob- tsis kam welded), thiab Hom S (seamless). Hom F tsuas yog muaj nyob rau qib A thiab tsis haum rau flanging; Hom E thiab S muaj nyob rau hauv Qib A thiab Qib B.
Dual Surface Treatments: Tus txheej txheem npog ob lub kav dej dub (tsis muaj coated) thiab kub -dip galvanized kav, muab kev xaiv rau cov kev xav tau sib txawv corrosion.
Fabrication Compatibility: Cov yeeb nkab haum rau vuam, coiling, dabtsi yog khoov, thiab flanging kev ua haujlwm, nrog Qib A nyiam rau kev sib txuas los yog txias dabtsi yog khoov.
Kev Ntsuas nruj nruj: Cov kev xeem yuav tsum muaj xws li kev sim hydrostatic, nro, khoov, thiab flattening xeem, nrog rau tsis yog -kev sim ua puas tsuaj rau cov kav dej welded kom zoo thiab kev nyab xeeb.
Core Components
Lub hauv paus ntawm ASTM A53 nyob rau hauv nws cov kev faib tawm meej ntawm cov yeeb nkab hom thiab qib, cov tshuaj muaj pes tsawg leeg thiab cov cuab yeej cuab yeej cuab tam, nruj me ntsis kam rau ua, thiab cov qauv kev xeem. Cov ntsiab lus no ua haujlwm ua ke los txheeb xyuas cov qauv ntsuas zoo rau cov kav dej carbon steel, ua kom lawv cov kev ua tau zoo thiab kev ntseeg siab hauv ntau yam kev siv.
Qhov tseem ceeb
Kev lag luam Standardization: Raws li kev lees paub thoob ntiaj teb tus qauv, ASTM A53 koom ua ke cov kev qhia tshwj xeeb ntawm cov pa roj carbon steel kav, txhawb kev lag luam thoob ntiaj teb thiab kev koom tes hauv engineering.
Tus nqi-Kev ua tau zoo: Nws muab qhov sib npaug ntawm kev ua tau zoo thiab tus nqi, ua rau nws xaiv qhov kev xaiv dav dav rau - cov phiaj xwm kev siv, txo cov nqi ntawm qhov project thaum ua tau raws li qhov xav tau ntawm engineering.
Versatility: Tus txheej txheem dav dav ntawm cov yeeb nkab hom, qhov ntau thiab tsawg, thiab kev kho saum npoo ua rau nws daim ntawv thov hauv ntau qhov kev lag luam, txhawb kev tsim kho, lub zog, thiab kev tsim kho hauv nroog.
II. Daim ntawv thov tseem ceeb ntawm ASTM A53 Standard Pipes
ASTM A53 cov kav dej muaj ntau yam thiab pom kev siv dav hauv ntau qhov haujlwm vim lawv cov khoom siv kho tshuab zoo, weldability, thiab tus nqi- ua tau zoo.
1. Kev thauj mus los
Kev Siv Dej thiab Dej Dej: Siv hauv cov kav dej hauv nroog, tsim cov kav dej, thiab cov kav dej phwj tuaj. Galvanized A53 cov kav dej yog nyiam rau cov dej siv tau zoo vim lawv cov kev tiv thaiv corrosion.
Gas thiab Cua Kab: Siv nyob rau hauv qis - cov pa roj carbon monoxide siab, compressed cua, thiab cov kav xa hluav taws xob muaj roj.
Chav thiab Kub Hloov: Siv nyob rau hauv qis - cov kav dej siab rau cov tshuab cua sov, cov kav hluav taws xob thermal cog auxiliary pipelines, thiab cov hluav taws xob hloov hluav taws xob.
2. Kev tsim kho thiab kev tsim qauv
Cov Khoom Siv Hauv Tsev: Siv los ua cov kab ke, kab teeb, thiab bracing hauv steel qauv vaj tsev, warehouses, thiab cov nroj tsuag muaj.
Scaffolding thiab Temporary Structures: Feem ntau ua hauj lwm hauv kev tsim kho scaffolding, kev txhawb nqa thav duab, thiab cov khoom siv nkag mus ib ntus vim lawv lub zog thiab yooj yim ntawm kev sib dhos.
Infrastructure: Siv rau hauv kev txhawb nqa choj, guardrails, thiab cov khoom siv hluav taws xob.
3. Kev siv tshuab thiab tshuab
Txheej Txheem Piping: Siv rau hauv cov chaw ua haujlwm rau kev xa cov kua dej, cov roj nplua nyeem, thiab cov dej txias hauv cov cuab yeej siv tshuab.
Machinery Cheebtsam: Siv raws li cov qauv hauv cov tshuab ua liaj ua teb, cov cuab yeej siv, thiab cov tshuab siv dav dav.
Kev Tiv Thaiv Hluav Taws Kub: Kub-dip galvanized A53 cov kav dej tau dav siv hauv cov tshuab tsis siv neeg lub tshuab nqus dej, cov hluav taws xob hluav taws xob, thiab cov hluav taws tua hluav taws hauv cov tsev lag luam thiab kev lag luam.
Txoj kev thov
Kev sib txuas: Cov kav dej feem ntau txuas nrog ntawm vuam, xov, lossis siv cov qauv fittings (xws li lub luj tshib, tees, thiab flanges) nyob ntawm daim ntawv thov thiab kev xav tau.
Kev txhim kho: Rau cov kav dej hauv av, cov ntaub pua tsev thiab cov khoom siv rov qab yuav tsum tau ua los tiv thaiv cov kav dej. Hauv kev siv cov qauv, cov kav dej raug txiav, khoov, thiab welded los tsim cov txheej txheem tsim nyog.
Kev Kho Hniav: Cov kav dej dub tuaj yeem pleev xim lossis pleev xim rau kev tiv thaiv corrosion ntxiv, thaum cov kav dej galvanized yog siv ncaj qha rau hauv qhov chaw corrosive.
III. Cov Qib Hlau Hauv qab ASTM A53 thiab Lawv Qhov Sib Txawv
ASTM A53 qhia ob qib steel thawj: Qib A thiab Qib B, uas sib txawv ntawm cov tshuaj muaj pes tsawg leeg thiab cov khoom siv kho tshuab, ua kom muaj zog sib txawv thiab kev tsim khoom.
Nqe lus piav qhia ntawm Steel Qib Qhov Sib Txawv
Qib A: Qib qis- carbon steel nrog qis carbon thiab manganese cov ntsiab lus. Nws muaj qhov zoo tshaj plaws ductility thiab formability, ua rau nws zoo tagnrho rau cov ntawv thov uas yuav tsum tau ua kom txias txias, coiling, thiab flanging. Txawm li cas los xij, nws muaj zog qis dua piv rau Qib B, haum rau qis -siab thiab tsis yog-load- cov ntawv thov kev coj noj coj ua.
Qib B: Ib qho nruab nrab - qib carbon steel nrog cov ntsiab lus carbon thiab manganese ntau dua, muab cov tensile ntau dua thiab tawm los. Nws muaj kev thauj khoom zoo dua -cov kabmob muaj peev xwm thiab tsim nyog rau kev siv siab thiab cov khoom siv uas yuav tsum tau muaj zog dua, thaum tseem tuav tau zoo weldability.
Table 1: Chemical Composition Comparison ntawm ASTM A53 Qib (Maximum, %)
| TABLE 1 Cov Kev Cai Siv Tshuaj | |||||||||
| Kev sib xyaw, max, % | |||||||||
| Cov pa roj carbon | Manganese | Phosphorus | Sulfur | Tooj A | NickelA | ChromiumA | MolybdenumA | VanadiumA | |
| Hom S (seamless yeeb nkab) | |||||||||
| Qib A | 0.25B | 0.95 | 0.05 | 0.045 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 |
| Qib B | 0.30C | 1.20 | 0.05 | 0.045 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 |
| Hom E (hluav taws xob{0}}kuj-welded) | |||||||||
| Qib A | 0.25B | 0.95 | 0.05 | 0.045 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 |
| Qib B | 0.30C | 1.20 | 0.05 | 0.045 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 |
| Hom F (lub qhov cub-welded yeeb nkab) | |||||||||
| Qib A thiab B | 0.30B | 1.20 | 0.05 | 0.045 | 0.40 | 0.40 | 0.40 | 0.15 | 0.08 |
| A Tag nrho cov muaj pes tsawg leeg rau tsib lub ntsiab lus yuav tsum tsis pub tshaj 1.00%. | |||||||||
| B Rau txhua qhov txo qis ntawm 0.01% qis dua qhov siab tshaj plaws ntawm cov pa roj carbon monoxide, qhov nce ntawm 0.06% manganese saum toj no qhov siab tshaj plaws yuav raug tso cai mus txog qhov siab tshaj ntawm 1.35%. | |||||||||
| C Rau txhua qhov kev txo qis ntawm 0.01% qis dua cov pa roj carbon siab tshaj plaws, qhov nce ntawm 0.06% manganese saum toj no qhov siab tshaj plaws yuav raug tso cai mus txog qhov siab tshaj ntawm 1.65%. | |||||||||
Table 2: Mechanical Properties Comparison ntawm ASTM A53 Qib
| TAB 2 1 Tensile Requirements | ||
| Qib A | Qib B | |
| Tensile zog, min, psi [MPa] | 330 MPa (48,000 psi) | 415 MPa (60,000 psi) |
| Yield zog, min, psi [MPa] | 205 MPa (30,000 psi) | 240 MPa (35,000 psi) |
| Elongation (min, 2-nti ntsuas) | Nws txawv ntawm cov yeeb nkab loj (feem ntau ntau dua lossis sib npaug li 25% rau qhov me me) | Nws txawv ntawm cov yeeb nkab loj (feem ntau ntau dua lossis sib npaug li 20% rau qhov me me) |
IV. Dimensional Tolerances ntawm ASTM A53 Txuj
ASTM A53 qhia meej qhov ntev ntev kom ntseeg tau qhov sib hloov thiab haum ntawm cov kav dej.
1. Sab nraud txoj kab uas hla (OD) kam rau ua
Rau NPS 1½ thiab me dua: ± 1% ntawm qhov teev OD lossis ± 0.015 nti (0.4 mm), qhov twg ntau dua.
Rau NPS 2 thiab loj dua: ± 1% ntawm OD teev.
2. Phab ntsa Thickness kam rau ua
Seamless kav (Hom S): Qhov tsawg kawg nkaus phab ntsa thickness ntawm txhua qhov chaw yuav tsum tsis txhob ntau tshaj 12.5% nyob rau hauv lub nominal phab ntsa thickness.
Welded kav (Hom E thiab F): Qhov tsawg kawg nkaus phab ntsa thickness ntawm ib qho chaw yuav tsum tsis txhob ntau tshaj 8% nyob rau hauv lub nominal phab ntsa thickness.
Qhov zoo ntawm phab ntsa thickness kam rau ua tsis tau teev tshwj tsis yog xav tau los ntawm kev yuav khoom.
3. Kev ua siab ntev ntev
Qhov siab tshaj plaws sib txawv los ntawm txoj kab ncaj nraim ntawm cov yeeb nkab axis yuav tsum tsis pub tshaj 0.2% ntawm cov yeeb nkab ntev.
4. Ovality kam rau ua
Qhov tawm ntawm - ntawm - roundness (qhov txawv ntawm qhov siab tshaj plaws thiab qhov tsawg kawg nkaus OD) yuav tsum tsis pub tshaj 1% ntawm nominal OD.
5. Ntev Ntev
Random lengths: Feem ntau 16–22 ft (4.88–6.71 m) rau ib leeg random, 6.71–10.67 m rau ob chav random.
Qhov ntev tshwj xeeb: ± 1/2 nti rau qhov ntev txog 30 ft, ± 3/4 nti rau qhov ntev tshaj 30 ft.
V. Feem Ntau Qhov Loj thiab Cov Lus Qhia ntawm ASTM A53 Pipes
Loj Ntau Yam Ua los ntawm Steel Mills
Round Pipes
- Outer Diameter (OD): 10.3 hli (NPS 1/8) txog 660.4 hli (NPS 26).
- Phab ntsa Thickness (WT): 1.65 hli txog 25.4 hli, npog cov sij hawm los ntawm SCH 5S txog SCH XXS (xws li STD, XH, XXH).
Square Pipes
- Sab Length: 20mm txog 200mm.
- Phab ntsa Thickness: 0.8mm-18mm.
Rectangular Pipes
- Sab Length: 20 × 30 mm txog 150 × 200 mm.
- Phab ntsa Thickness: 0.8mm-18mm.
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