DIMENSIONS THIAB LEEJ TWG ntawm ASTM A795 PIPE
| TABLE 1 Dimensions, Nyhav, thiab Test Siab rau lub teeb-Qhov hnyav tiv thaiv hluav taws kub ASTM A795 yeeb nkab-Teem sijhawm 10A | ||||||||||
| NPS Designator | Sab nraud txoj kab uas hla | Nominal Phab Ntsa Thickness | Nyhav Plain End | Kuaj Siab | ||||||
| Rauv-Welded | Seamless thiab Electric-Resistance-Welded | |||||||||
| hauv. | mm | hauv. | mm | lb/ft | kg/m | psi | MPa | psi | MPa | |
| 3/4 | 1.05 | (26.7) | 0.083 | (2.11) | 0.86 | (1.280) | 500 | (3.45) | 700 | (4.83) |
| 1 | 1.315 | (33.4) | 0.109 | (2.77) | 1.41 | (2.090) | 500 | (3.45) | 700 | (4.83) |
| 1.25 | 1.66 | (42.2) | 0.109 | (2.77) | 1.81 | (2.690) | 500 | (3.45) | 1000 | (6.89) |
| 1 1/2 | 1.9 | (48.3) | 0.109 | (2.77) | 2.09 | (3.110) | 500 | (3.45) | 1000 | (6.89) |
| 2 | 2.38 | (60.3) | 0.109 | (2.77) | 2.64 | (3.930) | 500 | (3.45) | 1000 | (6.89) |
| 2 1/2 | 2.88 | (73.0) | 0.12 | (3.05) | 3.53 | (5.260) | 500 | (3.45) | 1000 | (6.89) |
| 3 | 3.5 | (88.9) | 0.12 | (3.05) | 4.34 | (6.460) | 500 | (3.45) | 1000 | (6.89) |
| 3 1/2 | 4 | (101.6) | 0.12 | (3.05) | 4.98 | (7.410) | 500 | (3.45) | 1200 | (8.27) |
| 4 | 4.5 | (114.3) | 0.12 | (3.05) | 5.62 | (8.370) | 500 | (3.45) | 1200 | (8.27) |
| 5 | 5.56 | (141.3) | 0.134 | (3.40) | 7.78 | (11.580) | B | B | 1200 | (8.27) |
| 6 | 6.63 | (168.3) | 0.134 | (3.40) | 9.3 | (13.850) | B | B | 1000 | (5.51) |
| 8 | 8.63 | (219.1) | 0.188C | (4.78) | 16.96 | (25.260) | B | B | 800 | (4.83) |
| 10 | 10.75 | (273.1) | 0.188C | (4.78) | 21.23 | (31.620) | B | B | 700 | (6.89) |
| A: Teem caij 10 sib haum rau Teem caij 10S raws li teev hauv ANSI B 36.19 rau NPS 3⁄4 txog 6 nkaus xwb. | ||||||||||
| B: Rauv-welded yeeb nkab tsis yog ua nyob rau hauv qhov ntau thiab tsawg dua NPS 4. | ||||||||||
|
C: Tsis Teem caij 10. |
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| TABLE 2 Dimensions, Nyhav, Test Pressures rau Standard-Qhov hnyav tiv thaiv hluav taws kub ASTM A795 yeeb nkab-Teem sijhawm 30 thiab Teem sijhawm 40 | ||||||||||
| NPS Designator | Sab nraud txoj kab uas hla | Nominal Phab Ntsa Thickness | Nyhav Plain End | Kuaj Siab | ||||||
| Rauv-Welded | Seamless thiab Electric-Resistance-Welded | |||||||||
| hauv. | mm | hauv. | mm | lb/ft | kg/m | psi | MPa | psi | MPa | |
| 1/2 | 0.84 | (21.3) | 0.109 | (2.77) | 0.85 | (1.270) | 700 | (4.83) | 700 | (4.83) |
| 3/4 | 1.05 | (26.7) | 0.113 | (2.87) | 1.13 | (1.690) | 700 | (4.83) | 700 | (4.83) |
| 1 | 1.32 | (33.4) | 0.133 | (3.38) | 0.68 | (2.500) | 700 | (4.83) | 700 | (4.83) |
| 1 1/4 | 1.66 | (42.2) | 0.14 | (3.56) | 2.27 | (3.390) | 1000 | (6.89) | 1000 | (6.89) |
| 1 1/2 | 1.9 | (48.3) | 0.145 | (3.68) | 2.72 | (4.050) | 1000 | (6.89) | 1000 | (6.89) |
| 2 | 2.38 | (60.3) | 0.154 | (3.91) | 3.66 | (5.450) | 1000 | (6.89) | 1000 | (6.89) |
| 2 1/2 | 2.88 | (73.0) | 0.203 | (5.16) | 5.8 | (8.640) | 1000 | (6.89) | 1000 | (6.89) |
| 3 | 3.5 | (88.9) | 0.216 | (5.49) | 7.58 | (11.290) | 1000 | (6.89) | 1000 | (6.89) |
| 3 1/2 | 4 | (101.6) | 0.226 | (5.74) | 9.12 | (13.580) | 1200 | (8.27) | 1200 | (8.27) |
| 4 | 4.5 | (114.3) | 0.237 | (6.02) | 10.8 | (16.090) | 1200 | (8.27) | 1200 | (8.27) |
| 5 | 5.56 | (141.3) | 0.258 | (6.55) | 14.63 | (21.790) | C | C | 1200 | (8.27) |
| 6 | 6.63 | (168.3) | 0.28 | (7.11) | 18.99 | (28.290) | C | C | 1200 | (8.27) |
| 8 | 8.63 | (219.1) | 0.277A | (7.04) | 24.72 | (36.820) | C | C | 1200 | (8.27) |
| 10 | 10.75 | (273.1) | 0.307A | (7.80) | 34.27 | (51.050) | C | C | 1000 | (6.89) |
| A: NPS 1⁄2 txog 6-Schedule 40; NPS 8 thiab 10-Schedule 30. | ||||||||||
| B: Raws li 20-ft (6.1-m) ntev. | ||||||||||
| C: Rauv-welded yeeb nkab tsis yog ua nyob rau hauv qhov ntau thiab tsawg dua NPS 4. | ||||||||||
TSEEM CEEB NTAWM ASTM A795 PIPE
ASTM A795 nteg tawm qhov yuav tsum tau ua rau txhua qhov ntev ntawm cov yeeb nkab yuav tsum raug kuaj hydrostatic los ntawm cov chaw tsim khoom. Kev ntsuas hydrostatic yog qhov tseem ceeb txhawm rau txhawm rau xyuas kom tsis muaj qhov xau hauv cov yeeb nkab phab ntsa. Cov txheej txheem no tseem suav nrog kev sim cov yeeb nkab nrog cov kawg nkaus, nrog cov xov nkaus xwb, lossis nrog cov xov thiab cov couplings. Kev ntsuas hydrostatic tuaj yeem siv rau ib leeg lossis ntau qhov ntev, thiab nws yog ib qho tseem ceeb uas yuav tsum tau sim txhua qhov ntev ntawm cov yeeb nkab txhawm rau txhawm rau ua kom zoo ntawm tag nrho cov khoom. Los ntawm kev ua raws li tus qauv ASTM A795, cov tuam ntxhab tuaj yeem xyuas kom meej tias lawv cov kav dej ua tau raws li qhov yuav tsum tau ua thiab yog qhov zoo tshaj plaws.
1. Cov khoom siv ASTM A795 yuav tsum ua kom tau raws li cov txheej txheem tshuaj lom neeg uas tau teev tseg hauv cov lus hauv qab no.
2. Tus neeg yuav khoom tuaj yeem tshawb xyuas ob lub kav dej los ntawm txhua qhov ntau ntawm 500 qhov ntev, lossis ib feem ntawm qhov ntawd. Cov tshuaj muaj pes tsawg leeg yog li txiav txim siab yuav tsum ua kom tau raws li qhov yuav tsum tau teev tseg hauv cov lus hauv qab no.
3. Cov txheej txheem tshuaj ntsuam xyuas, kev coj ua, thiab cov ntsiab lus yuav tsum ua raws li Txoj Cai Kev Xeem, Kev Coj Ua, thiab Cov Lus Qhia A 751.
4. Yog tias kev txheeb xyuas ntawm ob lub yeeb nkab tsis ua raws li qhov yuav tsum tau teev tseg hauv cov lus hauv qab no, kev tshuaj xyuas ntawm cov kav dej ntxiv los ntawm tib qhov ntau ntawm ob npaug ntawm tus lej qub yuav tsum tau ua, txhua tus yuav tsum ua raws li cov cai teev tseg hauv cov lus hauv qab no.
| Kev xav tau tshuaj | ||||
| Si | C | Mn | P | S |
| Hom E (Electric{0}}Resistance-Welded Yeeb Nkab) & Hom S (Seamless Pipe) | ||||
| Qhib -Kev Noj Qab Haus Huv Hluav Taws Xob- Rauv lossis Basic -Oxygen | ||||
| Qib A | 0.25 | 0.95 | 0.035 | 0.035 |
| Qib B | 0.3 | 1.2 | 0.035 | 0.035 |
TSEEM CEEB ASTM A795 PIPE
- Hydrotest ntawm ASTM A795 Pipes
ASTM A795 nteg tawm qhov yuav tsum tau ua rau txhua qhov ntev ntawm cov yeeb nkab yuav tsum raug kuaj hydrostatic los ntawm cov chaw tsim khoom. Kev ntsuas hydrostatic yog qhov tseem ceeb txhawm rau txhawm rau xyuas kom tsis muaj qhov xau hauv cov yeeb nkab phab ntsa. Cov txheej txheem no tseem suav nrog kev sim cov yeeb nkab nrog cov kawg nkaus, nrog cov xov nkaus xwb, lossis nrog cov xov thiab cov couplings. Kev ntsuas hydrostatic tuaj yeem siv rau ib leeg lossis ntau qhov ntev, thiab nws yog ib qho tseem ceeb uas yuav tsum tau sim txhua qhov ntev ntawm cov yeeb nkab txhawm rau txhawm rau ua kom zoo ntawm tag nrho cov khoom. Los ntawm kev ua raws li tus qauv ASTM A795, cov tuam ntxhab tuaj yeem xyuas kom meej tias lawv cov kav dej ua tau raws li qhov yuav tsum tau ua thiab yog qhov zoo tshaj plaws. Qhov ntsuas qhov tsawg kawg nkaus yog nyob rau hauv Dimension & Size Table saum toj no.
- Nondestructive Electric Test ntawm ASTM A795 Pipes
Raws li ASTM A795, nondestructive electric testing (NDT) tuaj yeem siv los ua lwm txoj hauv kev kuaj hydrostatic rau dub thiab kub -dipped galvanized steel yeeb nkab. NDT yog txheej txheem uas siv hluav taws xob tam sim no los kuaj xyuas qhov tsis xws luag hauv cov khoom tsis ua rau cov yeeb nkab puas. Thaum txais los ntawm tus neeg yuav khoom, txhua lub yeeb nkab yuav tsum tau sim nrog NDT ua ntej nws tuaj yeem siv rau hauv lub tshuab hluav taws xob. Kev siv NDT muab ntau cov txiaj ntsig dhau los ntawm kev ntsuas hydrostatic, suav nrog lub sijhawm sim luv dua thiab cuam tshuam tsawg dua rau lub sijhawm tsim kho. Tsis tas li ntawd, NDT ua haujlwm zoo dua ntawm kev kuaj xyuas qhov tsis xws luag hauv thaj chaw vuam, ua rau nws muaj kev ntseeg siab dua rau kev ua kom zoo ntawm cov yeeb nkab. Yog li ntawd, kev siv NDT tau dhau los ua ntau dua hauv kev lag luam tua hluav taws.
- Flattening Test ntawm ASTM A795 Pipes
Tus qauv ASTM A795 yuav tsum tau ua ib qho kev ntsuas flattening ntawm cov kav dej kom ntseeg tau tias lawv zoo. Qhov kev ntsuam xyuas yuav tsum flattening ib tug qauv ntawm cov yeeb nkab, yam tsawg kawg yog 100 mm nyob rau hauv ntev, ntawm ob daim hlau sib txuas. Lub vuam yog nyob ntawm 0 lossis 90℃los ntawm txoj kab ntawm kev taw qhia ntawm lub zog, raws li xav tau. Muaj 3 kauj ruam rau kev xeem:
1. Thawj qhov kev ntsuam xyuas yog rau cov ductility ntawm cov weld, thiab nws yog ua los ntawm maj mam flattening lub weld kom txog thaum nws tawg. Yog tias muaj cov kab nrib pleb lossis tawg ntawm qhov chaw sab hauv lossis sab nraud ua ntej qhov kev ncua deb ntawm daim hlau yog tsawg dua ob -feem peb ntawm thawj sab nraud txoj kab uas hla ntawm cov yeeb nkab, ces qhov vuam tsis yog raws li cov qauv thiab yuav tsum tau kho.
2. Qhov kev sim thib ob yog rau ductility tshwj tsis yog cov vuam, thiab nws tau ua tib yam li thawj qhov kev sim. Txawm li cas los xij, yog tias muaj cov kab nrib pleb lossis tawg ntawm qhov chaw sab hauv lossis sab nraud ua ntej qhov kev ncua deb ntawm daim hlau yog tsawg dua ib -feem peb ntawm thawj sab nraud txoj kab uas hla ntawm cov yeeb nkab, tab sis tsis tsawg tshaj li tsib npaug ntawm phab ntsa thickness ntawm cov yeeb nkab, ces qhov vuam tsis yog raws li cov qauv thiab yuav tsum tau kho.
3. Qhov thib peb thiab zaum kawg kev xeem yog rau soundness, thiab nws yog ua los ntawm txuas ntxiv flatten lub weld kom txog rau thaum nws tawg los yog cov opposite phab ntsa ntawm cov specimen ntsib. Yog tias cov ntaub ntawv pov thawj ntawm cov khoom siv laminated lossis cov khoom tsis zoo lossis cov vuam tsis tiav tau tshwm sim thaum lub sijhawm kuaj no, ces tag nrho txoj haujlwm vuam yuav tsum raug suav tias tsis txaus siab.
Txheej ntawm ASTM A795 Pipes
ASTM A795 hluav taws sprinkler yeeb nkab yuav tsum tau galvanized nyob rau hauv ob qho tib si sab hauv thiab sab nraud los muab kev tiv thaiv txaus tiv thaiv corrosion. Lub zinc txheej yuav tsum tsis pub dawb ntawm qhov chaw tsis muaj coated, hlwv, flux deposits, los yog tag nrho dross inclusions. Tsis tas li ntawd, ib qho lumps, projections, globules, lossis hnyav deposits ntawm zinc uas tuaj yeem cuam tshuam rau kev siv cov khoom siv yog tsis tso cai. Cov yeeb nkab tua hluav taws yog ib qho tseem ceeb hauv txhua qhov kev tiv thaiv hluav taws, thiab nws yuav tsum ua kom tau raws li txhua yam kom ua tau zoo thiab ua tau zoo.
Yog hais tias cov hluav taws kub sprinkler yeeb nkab yog coated nrog zinc, nws yuav tsum muaj qhov tsawg kawg nkaus txheej hnyav ntawm 1.5 oz / ft2 (0.46 kg / m2). Qhov no feem ntau ua tiav los ntawm kub -dip galvanizing, nyob rau hauv uas cov hlau yog dipped nyob rau hauv molten zinc- zinc coats txheej txheej ntawm cov yeeb nkab, muab ib tug ruaj barrier tiv thaiv corrosion. Lub thickness ntawm txheej yog qhov tseem ceeb, vim nws cuam tshuam rau cov yeeb nkab lub peev xwm tiv taus hluav taws. Tus txheej txheem rau hluav taws kub sprinkler yeeb nkab yog ASTM A795, uas qhia txog qhov tsawg kawg nkaus txheej thickness ntawm 1.3 oz / ft2 (0.40 kg / m2). Qhov no ua kom ntseeg tau tias cov yeeb nkab yuav tuaj yeem tiv taus qhov kub ntawm qhov hluav taws kub yam tsis tau poob.
Cov yeeb nkab tua hluav taws feem ntau yuav tsum muaj cov txheej txheem tiv thaiv kom ua tau raws li qhov yuav tsum tau ua ntawm tus neeg yuav khoom. Cov txheej txheem tshwj xeeb yuav raug pom zoo los ntawm tus neeg yuav khoom thiab tus muag khoom, tab sis qee qhov kev xaiv muaj xws li roj, lacquer, enamel, lossis lwm yam khoom siv. Txhawm rau siv cov txheej txheem, cov yeeb nkab yuav tsum tau ua ntej ntxuav tag nrho cov khoom txawv teb chaws thiab qhuav. Thaum cov yeeb nkab tau npaj, cov txheej tuaj yeem siv tau raws li cov lus qhia los ntawm cov chaw tsim khoom. Cov txheej txheem no yog qhov tseem ceeb los xyuas kom meej tias cov yeeb nkab tua hluav taws ua tau raws li cov qauv tsim nyog.
Kev Ua Haujlwm, Ua tiav, thiab tshwm sim ntawm ASTM A795 Pipes
Hluav taws kub sprinkler yeeb nkab feem ntau yog siv los thauj cov dej hauv lub tshuab hluav taws xob. Yuav kom ua tau zoo, cov yeeb nkab tiav yuav tsum ua tau raws li cov qauv tsim los ntawm American Society for Testing and Materials (ASTM). Tshwj xeeb, cov yeeb nkab yuav tsum ncaj ncaj thiab tsis muaj qhov tsis xws luag. Ib qho kev tsis zoo nrog qhov tob tshaj 12.5 feem pua ntawm cov phab ntsa tuab yog suav tias yog qhov tsis xws. Tsis tas li ntawd, tag nrho cov burrs ntawm cov yeeb nkab kawg yuav tsum tau muab tshem tawm. Cov kev cai no yuav pab kom ntseeg tau tias cov yeeb nkab tua hluav taws yuav ua haujlwm zoo thaum muaj hluav taws kub.
Hluav taws kub sprinkler yeeb nkab yog ib hom yeeb nkab uas feem ntau siv hauv cov tshuab hluav taws xob. Cov yeeb nkab yuav tsum tau ua raws li qee yam kev coj ua thiaj li yuav siv tau rau hauv cov tshuab no. Piv txwv li, txhua qhov kawg ntawm cov yeeb nkab yuav tsum yog qhov kawg nkaus tshwj tsis yog tias tau teev tseg. Tsis tas li ntawd, thaum threads tau teev tseg, lawv yuav tsum tau tsim raws li ASME B1.20.1 gaging xyaum thiab kam rau ua. Thaum kawg, thaum cov couplings tau teev tseg, lawv yuav tsum tau tsim raws li Specification A 865. Cov yeeb nkab hluav taws xob hluav taws xob yuav tsum ua kom tau raws li cov cai no txhawm rau siv rau hauv cov tshuab hluav taws xob.
KHOOM PLIG ASTM A795 Pipes
Cov yeeb nkab tua hluav taws yog ib hom yeeb nkab steel uas siv tshwj xeeb hauv kev tua hluav taws. Nws yuav tsum raug cim nrog cov chaw tsim khoom lub npe lossis hom, hom yeeb nkab, ASTM lub npe, qhov ntev, thiab cov ntawv "NH" yog tias nws tsis tau kuaj hydrostatically. Cov ntaub ntawv no yuav tsum tau muab txuas ruaj ntseg rau txhua pob ntawm cov yeeb nkab NPS 112 thiab me dua. Cov yeeb nkab hluav taws kub feem ntau yog ua los ntawm cov xim dub lossis kub -dipped galvanized steel thiab nws muaj txoj kab uas hla ntawm 6-8 ntiv tes. Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias tsis yog txhua cov kav hlau hlau tsim nyog siv los ua cov kav dej tua hluav taws thiab nws yog ib qho tseem ceeb uas yuav tsum tau xyuas nrog koj cov kev txwv hluav taws hauv zos ua ntej kev teeb tsa.
Thaum cov txheej txheem txuas ntxiv txiav cov yeeb nkab rau hauv luv luv rau kev muag khoom raws li cov khoom siv, tus txheej txheem yuav tsum xa cov ntaub ntawv txheeb xyuas tag nrho rau txhua qhov tsis muaj cim txiav ntev, lossis cov cim hlau txuas ruaj ntseg txuas nrog cov pob ntawm cov yeeb nkab uas tsis muaj cim me me. Cov khoom siv tib yam yuav tsum suav nrog cov ntaub ntawv xa mus, nrog rau tus txheej txheem lub npe, lub cim lag luam, lossis hom. Los ntawm kev ua qhov no, cov neeg yuav khoom ntawm cov yeeb nkab txiav tuaj yeem paub tseeb tias lawv tau txais cov khoom zoo uas ua tau raws li lawv cov kev xav tau.
Ntxiv nrog rau cov qauv hais saum toj no, barcoding tau txais los ua tus cim ntxiv. Tus neeg yuav khoom tuaj yeem xaiv qhov bar -coding tswvyim los siv rau qhov kev txiav txim.
Lub Hom Phiaj ntawm Painting ASTM A795 Hluav Taws Xob Hluav Taws Xob hauv Liab
Lub hom phiaj ntawm lub tshuab tua hluav taws yog muab dej los tua hluav taws los yog tua hluav taws. Lub kaw lus feem ntau yog nyob rau ntawm lub ru tsev lossis cov pem teb saum toj kawg nkaus ntawm lub tsev, thiab cov kav dej uas nqa dej feem ntau yog pleev xim rau xim liab kom lawv pom tau yooj yim thaum muaj hluav taws. Cov tshuaj tua hluav taws feem ntau yog qhib los ntawm cua sov, thiab cov dej tawm los ntawm lub taub hau sprinkler uas nyob thoob plaws hauv lub tsev. Feem ntau, tsuas yog cov sprinklers ze tshaj plaws rau qhov hluav taws kub yuav qhib, uas txo cov dej puas tsuaj. Cov tshuaj tua hluav taws yog ib feem tseem ceeb ntawm txhua qhov kev nyab xeeb hluav taws, thiab lawv siv tuaj yeem pab cawm tib neeg txoj sia thiab khoom.
