ASTM B171 / B171M Cov Lus Qhia Tshwj Xeeb rauTooj-Alloy Phaj thiab Ntawvrau Siab Ntsig Hlab, Yas Ntim, thiab Cua Sov Tus Neeg Hloov Khoom
Qhov kev qhia tshwj xeeb no tsim cov tseev kom ua rau tooj liab-alloy phaj, ntawv ci, thiab lub voj voos txiav los ntawm phaj thiab ntawv rau cov hlab siab, thoob dej, thiab cov ua cua sov. Cov alloys hauv qab no yog them:
Tooj liab Alloy Yav dhau los Siv Kev Tsim Tus Qauv
C36500 Cov Khoom Los Hlau Muntz Hlau
C44300 Kev Pom Zoo, Arsenical
C44400 Admirality, Antimonial
C44500 Admirality, Phosphorized
C46400 Naval Nruag Nruag, Yam tsis muaj kev pom zoo
C46500 Naval Nruag Nruag, Arsenical
C61300 Txhuas Txhuas Bronze
C61400 Txhuas Txhuas D
C63000 10% Aluminium-Nickel Bronze
C63200 9% Aluminium-Nickel Bronze
C70600 90-10 Tooj Npis Tooj Npis
C70620 90-10 Tooj Liab tooj liab - (hloov rau vuam)
C71500 70-30 Tooj Npis Nickel
C71520 70-30 tooj liab npib tsib xee- (hloov rau vuam)
C72200
Hais Txog Cov Ntaub Ntawv
2.1 ASTM Cov Qauv:
B248 kev qhia tshwj xeeb rau cov kev cai dav dav rau Wrought Tooj Tooj thiab Tooj Liab-Alloy Phaj, Ntawv, Sawb, thiab Rolled
Bar
B248M Kev Qhia Tshwj Xeeb rau cov kev xav tau dav dav rau Wrought Tooj Tooj thiab Tooj Liab-Alloy Phaj, Ntawv, Sawb, thiab Rolled
Bar (Metric)
B601 Kev Txwv rau Kev Tsim Qauv Kub rau Tooj Liab thiab Tooj Tooj Tooj - Wrought thiab Cast
B846 Cov Lus Txhais rau Tooj thiab Tooj Liab Tooj Alloys
E8 / E8M Txoj Kev Xeem rau Kev Ntsuas nruj ntawm Cov Khoom Siv Hlau
E29 Xyaum rau Kev Siv Tus lej Tseem Ceeb Hauv Cov Ntaub Ntawv Kev Ntsuas kom txiav txim siab sib txawv nrog qhov tshwj xeeb
E54 Kev Ntsuas Cov Khoom Siv rau Kev Txheeb Xyuas Tshuaj ntawm Cov Pob Hluav Taws Xob Tshwj Xeeb thiab Bronzes (Tshem Tawm Xyoo 2002) 4
E62 Kev Ntsuas Kev Ntsuas rau Tshuaj Kuaj ntawm Tooj Liab thiab Tooj Liab (Txoj Haujlwm Photometric) (Tshem Tawm 2010) 4
E255 Kev Xyaum Ua Qauv Ntsuas thiab Tooj Tooj Tooj Alloys rau Kev Txiav Txim Siab Kev Sau Tshuaj
E478 Kev Ntsuas Cov Khoom Siv rau Kev Ntsuas Tshuaj ntawm Tooj Liab Alloys
E527 Kev Xyaum Ua Cov lej Tooj thiab Alloys hauv Cov Txheej Txheem Unified Numbering System (UNS)
3. Cov Lus Siv
3.1 Rau cov lus txhais ntawm cov ntsiab lus muaj feem rau tooj thiab tooj liab tooj hlau, saib rau Cov Lus Txhais B846.
4. Cov ntaub ntawv xaj khoom
4.1 Muaj cov ntaub ntawv txuas mus ntxiv thaum tso cov khoom txiav txim rau cov khoom lag luam nyob hauv qhov kev qhia meej no, raws li tsim nyog:
4.1.1 ASTM kev xaiv thiab xyoo muaj teebmeem,
4.1.2 Txawm hais tias nti-phaus lossis SI units muaj siv (saib 1.2),
4.1.3 Copper Alloy UNS. Tsis muaj. (Saib Ntu 6, Rooj 1),
4.1.4 Txawm hais tias cov hlau xaj yuav raug siv rau hauv cov ntawv thov kom nws tau txais welded (saib Cov Lus 1, cov lus hauv qab B thiab C rau
UNS Nos. C61300 thiab C72200, thiab, thiab UNS Nos. C70620 thiab C71520 sawv cev ntawm UNS Nos. C70600 thiab
C71500),
4.1.5 Txawm hais tias phaj yuav tsum yog siv lub tshuab (saib 9.1.3),
4.1.6 Txoj cai zam rau yog licas (Cov Lus 2 Cov Lus Qhia A)
4.1.7 Ua Ntawv Pov Thawj, yog tias xav tau (Ntu 17),
4.1.8 Nyhav (tag nrho rau txhua qhov loj me),
4.1.9 Zeb xeem qhia, yog tias yuav tsum tau (Tshooj 18),
4.1.10 Ua cim tshwj xeeb, yog tias xav tau (Ntu 19), thiab
4.1.11 Txawm yuav tsum tau 0.2 yield offset lub zog.
5. Cov Khoom Siv thiab Chaw tsim khoom
5.1 Cov Khoom Siv — Cov khoom siv thiab kev tsim khoom yuav tsum yog ncuav mog qab zib ntawm Copper Alloy UNS No.
kev txiav txim thiab yuav tsum yog ntawm cov duab zoo thiab lub suab thiaj li tsim nyog rau kev tsim khoom rau hauv cov khoom kawg.
5.2 Kev tsim khoom — Cov khoom lag luam yuav tsum yog tsim los ntawm kub dov lossis tuav thiab ua tiav los ntawm cov ua haujlwm txias thiab
annealing li qhov tsim nyog kom ua tiav qhov yuav tsum tau ua qhov ntev thiab cov khoom.
6. Tshuaj lom neeg muaj pes tsawg leeg
6.1 Cov ntaub ntawv yuav tsum ua raws li cov tshuaj sib haum rau hauv cov lus qhia 1 rau cov tooj liab
UNS tsim qauv teev nyob hauv cov ntaub ntawv xaj khoom.
6.2 Cov lus muaj pes tsawg leeg no tsis txwv qhov muaj lwm yam khoom siv. Cov kev txwv rau cov yam tsis muaj npe yuav yog
tsim los ntawm kev pom zoo ntawm cov chaw tsim khoom lossis cov chaw muag khoom thiab cov neeg yuav khoom.
6.3 Rau cov alloys uas teev rau hauv qab no, nyob ntawm qhov ntsuas ntawm kev ntsuas, tooj liab lossis zinc, ntsig txog, yuav nqa tau
raws li qhov sib txawv ntawm qhov sib xyaw ntawm tag nrho cov ntsiab tsom xam thiab 100%. Thaum tag nrho cov ntsiab
6.3.1 Rau cov alloys uas teev rau hauv qab no, tooj liab yuav raug coj los ua qhov sib txawv nruab nrab ntawm tus lej ntawm tag nrho cov ntsiab thiab 100%.
Thaum tag nrho cov ntsiab hauv Table 1 txheeb xyuas, lawv cov lej
7. Kev npau taws kub
7.1 Cov ntsuas kub muaj nyob rau hauv qhov kev qhia meej no, thiab raws li tau piav qhia hauv Classification B601, zoo li Kub Rolled (M20), Kub
Rolled thiab Annealed (O25), Cov Kub Kub thiab Kev Tso Cai (O20), thiab Kub Ua Kom Cua Txias (M10) raws li muab hauv Kem 3.
7.1.1 Cov khoom lag luam tsim rau ASME Boiler thiab Cov Lus Qhia Txog Kev Nkag Siab Cov pa taws yuav tsum tau ntawv pov thawj rau O25 lossis O20
npau taws.
7.1.2 Cov khoom lag luam tsim rau lwm yam dua li ASME Boiler thiab Cov Lus Cim Lub Nkoj Siab Hlawv tuaj yeem tsim nyob rau hauv
xws li M20, M10, O20, lossis O25 npau taws.
8. Kev Tsoo Vaj Tse Khoom Khoom Yuav Tsum Tau Ua
8.1 Lub Zog Lub Cev Muaj Zog:
8.1.1 Cov khoom lag luam muaj nyob hauv nqe lus no yuav tsum ua raws li qhov ua tau raws li cov khoom ntiag tug tau teev hauv Rooj Lus 3,
thaum kuaj tau raws li Txoj Kev Xeem E8 / E8M.
9. Qhov loj me, Loj, thiab Pom Zoo Ntau Yam
9.1 Thickness:
9.1.1 Lub thickness haum rau cov paib tooj liab Alloy UNS Nos. C36500, C44300, C44400, C44500, C46400, thiab
C46500 yuav tsum muaj raws li hais hauv Kem 2.
9.1.2 Lub thickness tso cai rau cov paib tooj liab Alloy UNS Nos. C61300, C61400, C63000, C63200, C71500,
C70620, C71520, thiab C72200 yuav tsum yog 25% ntau dua qhov tau teev tseg hauv Cov Lus 2.
9.1.3 Yog tias daim hlau raug tshuab, cov tuab tiv thaiv yuav tsum siv rau feem machined nkaus xwb.
9.1.4 Closer qhov tuab txaus siab dua li cov tau teev tseg hauv Cov Lus 2 tuaj yeem nqa los ntawm cov tshuab ua haujlwm saum npoo. Qhov no yog a
cov khoom tshwj xeeb thiab raug rau kev pom zoo ntawm tus tsim khoom thiab tus neeg yuav. Cov khoom tshwj xeeb no yuav tsum
thov tsuas yog thaum tsim los ntawm tus neeg yuav khoom hauv daim ntawv cog lus lossis kev txiav txim.
9.1.5 Yog tsis muaj kev pom zoo los ntawm tus tsim thiab tus neeg yuav, cov tuab tuab ntawm cov phaj tshwj xeeb no yuav tsum
txiav txim siab los ntawm kev ntsuas raws qhov ntev ntawm lub phaj txog qhov ntev ntawm 7 hauv. [180 mm] los ntawm ntug.
9.2 Txoj kab uas hla, ntev, lossis Dav - Cov qhov ntev, ntev, lossis dav ntawm daim hlau yuav tsum tsis pub tsawg tshaj qhov tau teev tseg. Tus
diameters, ntev, lossis dav ntawm cov paib tuaj yeem tshaj thosespecified los ntawm cov nyiaj hauv daim duab 4.
9.3 Flatness - Lub tiaj tiaj kam rau ntawm ib daim phiaj yuav tsum tsis pub ntau tshaj li cov teev nyob rau hauv cov lus 5. Cov kev tso cai
qhia yog tag nrho cov kev tso cai hloov pauv rau cov paib raws li tau txiav txim, thiab tsis siv rau 7-hauv. [180-mm] marginal thaj tsam ntawm ntug ntawm lub phaj. Kev kuaj kom pom lub tiaj tiaj yuav tsum yog ua los ntawm kev muab daim phaj tso rau ntawm ib lub tiaj tiaj tiaj uas muaj tus ntug sau tias "Straight Side", thov daim 72-in. [2-m] cov lus cog thaum qhov loj tso cai, lossis luv dua qhov sib npaug ntawm qhov ntev yuav raug tshuaj xyuas, thiab ntsuas qhov tob ntawm lub qhov tob ntawm cov npoo ncaj thiab phaj.
9.4 Phaj thiab Daim Ntawv hnyav hnyav rau cov hlab ntsha siab - Thaum lub phaj los yog daim ntawv tooj liab Alloy UNS Nos. C70600, C70620,
C71500, C71520, lossis C72200 raug yuam kom txhawm rau lub nkoj siab tshwj xeeb, qhov siab tshaj qhov nyhav tshaj plaws nyob rau hauv Daim Ntawv 6 yuav tsum siv ntxiv rau qhov yuav tsum tau ua kom cov tuab haum ntawm cov lus qhia 2. Qhov hnyav ntawm txhua ntau tsib lossis ntau daim paib lossis nplooj ntawv yuav tsum tsis pub tshaj nominal luj los ntawm ntau dua qhov tau teev tseg hauv Rooj 6. Cov phaj thiab cov ntawv ntau ntau tsawg dua tsib yuav tau tswj hwm los ntawm cov tuab qhov haum ntawmTable 2. Rau lub hom phiaj ntawm kev suav hnyav, cov khoom siv ntom ntaws siv yuav tsum muaj raws li teev hauv Rooj 7.
10. Ua haujlwm siab, Ua tiav, thiab tshwm
10.1 Cov khoom lag luam yuav tsum tsis muaj qhov tsis xws luag, tab sis cov khoom tsis muaj lub cev uas tsis cuam tshuam nrog cov ntawv thov uas tsim nyog tau txais.
11. Kev Xeem
11.1 Cov ntau qhov ntau, qhov loj me, thiab xaiv ntawm cov khoom yuav tsum yog raws li hauv qab no:
11.1.1 Ntau Loj - 10 000 lbs [4550 kg] lossis tsawg dua cov khoom ntawm tib hom zeb, ntau, npau, thiab tuab, raug rau
soj ntsuam ib zaug.
11.1.2 Feem Ntau me me - Plaub daim qauv ntxiv yuav tsum raug xaiv los ua tus sawv cev ntawm txhua qhov. Yog tias ntau ntau tsawg dua plaub daim, qauv yuav tsum raug xaiv thiaj li ua tus sawv cev ntawm txhua thooj.
11.2 Kev Tshawb Fawb Tshuaj - Ib qho qauv rau tshuaj lom neeg yuav tsum tau coj thiab npaj ua raws li Kev Ua E255.
Kev xyaum, kev ntxaij, thiab lwm yam, yuav suav los hnyav sib luag ntawm txhua daim qauv no xaiv ua
raws li 11.1.2 thiab ua ke rau hauv ib qho qauv coj los ua ke. Qhov hnyav tsawg kawg ntawm cov qauv sib txuas uas yog
yuav tsum muab faib ua peb ntu sib npaug yuav tsum yog 150 g.
11.2.1 Hloov ntawm kev coj ua piv txwv raws li Kev Coj E255, tus neeg tsim khoom lag luam yuav tsum muaj kev xaiv txiav txim siab
ua raws li cov tshuaj lom neeg los ntawm kev tshuaj xyuas cov piv txwv ntawm lub sijhawm castings raug nchuav lossis cov qauv coj los ntawm cov khoom tiav. Yog tias cov chaw tsim khoom txiav txim siab cov tshuaj lom neeg lub cev ntawm cov khoom thaum lub sijhawm tsim khoom, nws yuav tsum tsis txhob coj mus kuaj thiab txheeb xyuas cov khoom tiav Tus naj npawb ntawm cov qauv coj los txiav txim txog tshuaj lom neeg yog muaj raws li hauv qab no:
11.2.1.1 Thaum kuaj cov zauv thaum lub sijhawm cov castings nchuav tsawg kawg, tsawg kawg ib qho qauv rau txhua pawg ntawm cov hlau nplaum nchuav ib txhij los ntawm tib lub hlau ntawm hlau.
11.2.1.2 Thaum cov hnoos qeev tau coj los ntawm cov khoom lag luam tiav lawm, yuav tsum coj ib qho qauv los sawv cev rau 10 000 lbs
[4550 kg] los sis feem ntawm cov ntawd, tshwj tsis yog tias yuav tsum tsis ntau tshaj ib qho qauv ib qho twg yuav tsum tau ua ib daim.
11.2.2 Vim hais tias ntawm qhov tsis sib xws ntawm kev ua haujlwm ofcastings rau hauv kev tsim khoom, nws tsis yog qhov tseeb
kev tshawb xyuas tshwj xeeb casting nrog ib qho kev txiav txim siab ntawm cov khoom tiav.
11.2.3 Yog tias yuav tsum muaj kub los yog cim qhov tseeb, tus neeg yuav khoom yuav tsum qhia cov ntsiab lus xav tau.
12. Tus naj npawb Kev Ntsuam Xyuas thiab Kev Rov Ua Haujlwm
12.1 Kev Xeem:
12.1.1 Kev Txheeb Xyuas Tshuaj - Tshuaj lom neeg lub cev yuav tsum txiav txim siab raws li lub ntsiab lus txhais los ntawm tsawg kawg yog ob qhov kev tshuaj ntsuam ntawm cov qauv, thiab cov txiaj ntsig ntawm txhua qhov rov ua tiav yuav tsum ua tiav cov kev xav tau ntawm cov khoom lag luam.
12.2 Lwm Cov Kev Kuaj — Rau lwm cov ntawv xeem, yuav tsum cug ib qho nqaij me ntawm ob qho qauv me me uas xaiv ua ntej
11.1.2. Qhov kev ntsuam xyuas xav tau yuav tsum ua rau txhua qhov piv txwv li xaiv tau.
12.3 Cov Kev Rov Ntsuam Xyuas:
12.3.1 Yog tias ib qho qauv kuaj pom tias muaj qhov ua tsis zoo los yog txhim kho qhov tsis zoo, nws yuav raug muab pov tseg thiab lwm qhov qauv
hloov chaw.
12.3.2 Yog tias feem pua elongation ntawm ib qho qauv ntsuas yog tsawg tshaj li qhov tau hais tseg, thiab ib feem ntawm qhov kev faus yog sab nraum nruab nrab ob feem peb ntawm cov gage ntev, lossis hauv qhov punched lossis scribed lub cim nyob rau hauv ntu txo, rov kuaj yuav tsum tso cai.
12.3.3 Yog tias ib qho ntawm cov kev xeem tau ua los txiav txim siab pom ib qho ntawm cov khoom tsis haum yuav ua tsis tau raws li qhov kev txwv, qhov kev ntsuas no
yuav tsum rov ua rau ob ntawm cov seem uas raug xaiv raws li 11.1.2, thiab cov txiaj ntsig ntawm ob qho kev xeem no yuav tsum ua raws li cov tseev kom muaj.
12.3.4 Yog tias lub tshuaj tshuaj tsis ua raws li cov kev txwv tshwj xeeb, kev tshuaj xyuas yuav tsum ua rau ntawm qhov tsim tawm tshiab
qauv npaj los ntawm tej ntawv xaiv raws li
11.1.2. Cov txiaj ntsig ntawm kev ntsuas rov qab yuav tsum ua raws li cov cai teev tseg.
13. Cov Qauv Ntsuas
13.1 Cov khoom thiab cov tshuaj lom neeg tau suav nrog hauv qhov kev qhia meej no, yog tias muaj kev tsis sib haum xeeb, yuav raug
mined nyob rau hauv raws li cov ASTM xeem txoj kev xeem:
13.1.1 Nro- E8 / E8M.
13.1.2 Kev Tshawb Fawb Tshuaj — Raws li hauv qab no:
Kev Tshawb Xeem Cheeb Tsam
Tooj liab E478
Aluminium E478
Antimony E62
Arsenic E62
Hlau
GG lt; 1.3% E478
GG gt; 1.3% E54
Lead E478 (AA)
Manganese E62
Npib tsib xee:
GG lt; 5% E478 (duab)
GG gt; 5% E478 (gravimetric)
Phosphorus E62
Silicon E54 (perchloric acid)
Tin E478
Zinc
GG lt; 2% E478 (AA)
GG gt; 2% E478 (titrametric)
13.2 Yog hais tias tsis sib haum, cov ntsiab lus leej faj ntawm cov alloys uas tau sau rau hauv cov lus qhia tshwj xeeb no yuav raug txiav txim siab raws li txoj kev tau muab rau hauv cov qhua rau Kev Qhia Tshwj Xeeb B248 lossis B248M.
14. Qhov Tseem Ceeb Ntawm Cov Lus Txwv
14.1 Rau cov laj thawj ntawm kev txiav txim siab ua raws li cov kev cai teev tseg rau cov kev cai ntawm cov khoom tau sau tseg hauv
Cov lus hauv qab no thiab rau cov kev zam, qhov kev pom lossis cov nqi ntsuas yuav tsum raug suav txij li qhia raws li txoj cai hloov ntawm Kev Siv E29: Cov Khoom Txheej Nyob Ib Puag Ncig Cov Khoom Siv Tau Soj Ntsuam lossis Xam
Tshuaj lom neeg muaj pes tsawg leeg nyob ze rau tus kawg tes sab tes tseem ceeb siv coj los hais txog tus nqi txwv
Lub zog ua tau nyob ze ksi [ze 5 MPa]
Tos txais lub zog nyob ze ksi [ze 5 MPa]
Elongation ntawm 5% thiab tshaj li 1%
15. Soj Ntsuam
15.1 Cov chaw tsim khoom yuav tshuaj xyuas thiab ua cov kev sim tsim nyog kom paub tseeb tias cov khoom lag luam puas ua raws li cov
qhov xav tau ntawm qhov tshwj xeeb no.
15.2 Yog tias, ntxiv rau, kev kuaj xyuas cov khoom siv los ntawm tus neeg yuav khoom yog pom zoo los ntawm cov kws tsim khoom thiab tus qauv
chaser ua ib feem ntawm cov ntawv cog lus yuav khoom, xwm txheej ntawm cov chaw xav tau los txaus siab rau tus neeg soj ntsuam sawv cev lub
tus neeg yuav khoom hais tias cov khoom tau raug muab ua kom tau raws li cov lus no yuav tsum suav nrog kev pom zoo. Txhua qhov kev ntsuam xyuas thiab kev tshuaj xyuas yuav tsum ua kom tsis txhob cuam tshuam nrog kev ua haujlwm ntawm kev ua haujlwm.
15.3 Cov chaw tsim khoom thiab cov neeg yuav khoom, los ntawm kev sib pom zoo, tuaj yeem ua tiav qhov kev kuaj xyuas zaum kawg ib txhij.
16. Kev xyeej thiab rov hais dua
16.1 Kev Tso Tseg - Cov khoom uas tsis ua raws li qhov yuav tsum tau ua los ntawm kev txheeb xyuas qhov tseeb thaum kuaj lossis kuaj los ntawm
tus neeg yuav lossis tus neeg sawv cev rau nws yuav raug tsis lees txais. Cov kev tsis lees yuav tsum ceeb toom mus rau lub chaw tsim khoom lossis chaw muag khoom sai. Ib qho ntxiv, yuav sau ntawv ceebtoom lossis tsis lees txais yuav ua raws.
16.2 Kev Rov Kho Dua - Yog tias tsis txaus siab rau cov txiaj ntsig ntawm kev ntsuas, lub chaw tsim khoom lossis tus xa khoom tuaj yeem foob rau
kev xyaum.
17. Kev Muaj Ntawv Pov Thawj
17.1 Thaum teev nyob rau hauv kev yuav khoom lossis daim ntawv cog lus, tus tsim khoom lag luam yuav muab rau cov neeg yuav khoom ib daim ntawv pov thawj qhia tias txhua qhov ntau tau kuaj, kuaj thiab kuaj xyuas raws li cov lus no thiab tau ua tiav.
17.2 Thaum cov khoom siv tau raug teev tseg kom ua tau raws li cov kev xav tau ntawm ASME Boiler thiab Siab Vessel Code, daim ntawv pov thawj
cov tseev kom muaj.
18. Daim Ntawv Ntsuas Kev Ntsuas
18.1 Thaum teev nyob hauv daim ntawv cog lus lossis kev yuav khoom, ib daim ntawv tshaj tawm ntawm cov ntawv xeem yuav tsum yog ua.
19. Ntim thiab Ntim Cim Cim
19.1 Ntim:
19.1.1 Cov khoom lag luam yuav tsum sib cais los ntawm qhov loj me, muaj pes tsawg leeg, thiab lub siab ntev, thiab npaj rau cov zaub mov xa tuaj xws li kom ntseeg tau tias muaj kev lees txais los ntawm cov tuam txhab thauj mus los thiab muaj kev tiv thaiv los ntawm kev pheej hmoo ntawm kev thauj mus los.
19.2 Pob Ntawv Cim:
19.2.1 Txhua chav xa khoom yuav tsum muaj lub cim ntsuas nrog qhov kev yuav khoom naj npawb, hlau lossis cov qauv siv hlau, siab npau,
qhov loj me, cov duab, cov nyiaj tag nrho thiab nqa tawm, thiab cov npe ntawm cov xa khoom. Yuav tsum qhia tus lej lej tshwj xeeb, thaum qhia meej.
19.3 Cov Khoom Siv:
19.3.1 Rau ASME Boiler thiab Siab Vessel Code daim ntawv thov, lub npe lossis cim kev lag luam ntawm cov chaw tsim khoom thiab
tus lej tsim khoom lag luam ntau tus lej yuav tsum tau ntaus thwj los yog txhav rau ntawm txhua daim phaj tiav thiab daim nplooj hauv ob qho chaw tsis pub tsawg tshaj 12 hauv. Yog tias lub phaj thiab nplooj ntawv tsawg dhau los nrhiav cov cim rau txoj hauv kev no, cov cim yuav muab tso rau ntawm qhov chaw nruab nrab ntawm cov paib thiab cov ntawv.
Xws li txoj hlua khi caj dab, cim yuav raug tso 12 hauv. [300 mm] los ntawm qhov kawg. Phaj tus lej thiab hom yuav tsum tau
legibly ntaus rau ntawm txhua daim phaj thiab ntawm txhua qhov quav coj mus kuaj.
20. Cov ntsiab lus
20.1 admiralty hlau phaj thiab ntawv; txhuas bronze phaj thiab ntawv; txhuas-npib tsib xee bronze phaj thiab ntawv;
tooj liab npib tsib xee phaj thiab ntawv; muntz hlau phaj thiab ntawv; naval dag phaj thiab ntawv; phaj thiab daim ntawv ua haujlwm siab; UNS No. C36500; UNS No. C43300; UNS No. C44400; UNS No. C44500; UNS No. C46400; UNS No. C46500; UNS No. C61300; UNS No. C61400; UNS No. C63000; UNS No. C63200; UNS No. C70600; UNS No. C70620; UNS No. C71500; UNS No. C71520
