2507 duplex stainless hlau valve siv JB / T7746 "Compact steel valve" kev lag luam tus qauv qhia

2507 duplex stainless hlau valve siv JB / T7746 "Compactsteel valve"Industrial standard introduction

Peb lub tuam txhab tshwj xeeb hauv kev tsim cov seawater 2205 duplex stainless hlau pob valve 2507 duplex stainless hlau pob valve 2205 duplex stainless hlau ntiaj teb valve 2507 duplex stainless hlau ntiaj teb valve 2205 duplex stainless hlau rooj vag valve 2507 duplex stainless hlau rooj vag valve 2205 duplex stainless hlau Y- hom lim 2507 duplex stainless hlau lim 2205 kos valve 2507 kos valve thiab lwm yam khoom
Seawater 2205 duplex steel valve molybdenum duplex stainless hlau muaj kev tiv thaiv zoo rau chloride kev nyuaj siab corrosion nyob rau hauv qis kev ntxhov siab. Feem ntau, 18-8 hom austenitic stainless hlau yog qhov ua rau muaj kev ntxhov siab corrosion puas hauv nruab nrab chloride tov saum 60C. Thaum tshav kub kub exchangers, evaporators thiab lwm yam khoom siv ua los ntawm hom stainless hlau nyob rau hauv lub lag luam nruab nrab ntawm kab chloride thiab hydrogen sulfide muaj ib tug nyiam ua rau kev nyuaj siab corrosion puas, thaum duplex stainless hlau muaj ib tug zoo kuj.
(2) Seawater 2205 duplex steel valve molybdenum duplex stainless hlau muaj corrosion kuj zoo. Qhov tseem ceeb pitting peev xwm ntawm duplex stainless hlau zoo ib yam li cov austenitic stainless hlau nrog tib pitting kuj (PRE = Cr% + 3.3Mo% + 16N%). Kev tiv thaiv corrosion ntawm duplex stainless hlau thiab austenitic stainless hlau zoo ib yam li AI 316L. Kev tiv thaiv corrosion ntawm high chromium duplex stainless hlau uas muaj 25% Cr, tshwj xeeb tshaj yog nitrogen, yog siab dua li ntawm AI 316L.
(3) Nrog zoo corrosion kuj rau qaug zog thiab hnav corrosion kev ua tau zoo. Hauv qee qhov nruab nrab corrosive, haum rau kev tsim cov twj, li qub thiab lwm yam khoom siv fais fab.
(4) Cov khoom zoo txhua yam. Lub zog siab thiab qaug zog, lub zog tawm los yog 18-8 hom austenitic stainless hlau 2 zaug. Nyob rau hauv lub xeev daws teeb meem, lub elongation mus txog 25%, thiab tus nqi toughness AK (V-notch) yog siab tshaj 100J.
(5) Zoo weldability, me me kub tawg nyiam, feem ntau ua ntej vuam yam tsis muaj preheating, vuam yam tsis muaj kev kho cua sov, tuaj yeem welded nrog 18-8 hom austenitic stainless hlau lossis carbon hlau thiab lwm yam sib txawv.
(6) Lub thermal ua haujlwm kub ntau ntawm duplex stainless hlau uas muaj chromium tsawg (18% Cr) yog dav dua li ntawm 18-8 austenitic stainless hlau, thiab qhov tsis kam yog me me. Nws tuaj yeem dov ncaj qha los tsim steel phaj yam tsis muaj forging. Duplex stainless hlau uas muaj chromium siab (25% Cr) yog ib qho nyuaj me ntsis dua li austenitic stainless hlau thermal ua, tuaj yeem tsim cov phaj, raj thiab cov khoom siv hlau.
(7) txias ua hauj lwm tshaj 18-8 hom austenitic stainless hlau ua hauj lwm hardening nyhuv yog loj, nyob rau hauv lub raj, phaj deformation nyob rau hauv thawj theem, yuav tsum tau siv ntau dua kev nyuaj siab rau deformation.
(8) Piv nrog austenitic stainless hlau, siab thermal conductivity, tsis tshua muaj linear expansion coefficient, haum rau cov khoom siv hauv ob sab phlu thiab tsim cov phaj sib xyaw. Nws kuj tseem tsim nyog rau kev ua lub raj tub ntxhais ntawm cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob hloov pauv tau siab dua li ntawm austenitic stainless hlau.
(9) Tseem muaj ntau yam ntawm brittleness nyiam ntawm siab chromium ferrite stainless hlau, yuav tsum tsis txhob siv nyob rau hauv siab tshaj 300C ua hauj lwm tej yam kev mob. Qhov qis dua cov ntsiab lus ntawm chromium ntawm duplex stainless hlau, qhov tsawg dua qhov kev puas tsuaj ntawm qhov sib npaug ntawm cov nkig.
JB / T7746 "Compact Steel Valve" Kev lag luam tus qauv qhia txog kev tsim qauv tam sim no thiab tsim qauv rau forging steel me me inch valve hauv peb lub teb chaws yog JB / T 7746-2006 "Compact Steel Valve", tus qauv tau pom zoo thiab tso tawm rau lub Cuaj Hlis 14, 2006 , hnub siv yog Lub Peb Hlis 1, 2007. Hloov ntawm JB/T 7746-1995 "Txo txoj kab uas hla forged steel Valve".
I. Txheej txheem cej luam
Tam sim no, tsim thiab tsim qauv ntawm forged steel me me txoj kab uas hla valve hauv peb lub teb chaws yog JB / T 7746-2006 "Compact Steel Valve", tus qauv no tau pom zoo thiab muab tso rau lub Cuaj Hlis 14, 2006, hnub siv yog Lub Peb Hlis 1, 2007 , nyob rau hauv qhov chaw ntawm JB / T 7746-1995 "Txo txoj kab uas hla Forged Steel Valve".
Qhov kev hloov kho no hais txog American Petroleum Institute API 602-1998 "Compact Steel Gate Valves for Flanged, Threaded, Welded and Extended Body Connections" thiab ua raws li API 602 hauv cov kev cai loj.
Cov txheej txheem no qhia txog cov yam ntxwv ntawm cov qauv, cov kev xav tau, cov qauv kev sim, kev soj ntsuam cov cai, kos npe thiab cov khoom yuav tsum tau ua ntawm txo txoj kab uas hla steel li qub.
Cov qauv no siv rau lub rooj vag, lub ntiaj teb, nqa thiab viav vias kos li qub. Rau cov xov sab hauv thiab lub qhov (socket) vuam li qub nrog nominal siab PN18 ~ PN250 thiab nominal loj DN8 ~ DN65; Kuj tseem siv tau rau nominal siab PN18 ~ PN250, nominal loj DN8 ~ DN100 flange kev twb kev txuas thiab taub qab vuam txuas valve. Siv nruab nrab rau dej, roj av thiab roj av muaj feem xyuam rau cov khoom, cov nkev, nkev, thiab lwm yam.
Cov qauv no kuj tseem siv tau rau cov li qub nrog cov ntsaws ntsaws ruaj ruaj, nominal siab PN16 ~ PN250, nominal loj DN8 ~ DN50.
Ob, JB / T 7746 "compact steel valve" lub ntsiab sib txawv ntawm cov qauv qub thiab tshiab
1, hloov lub npe, tus thawj JB / T7746-95 tus qauv hu ua "Txo txoj kab uas hla forged steel valve", tus qauv tshiab JB / T 7746-2006 tus qauv hu ua "compact steel valve";
2. Ntau qhov kev txiav txim siab;
3. Ntxiv "Bllows Sealing Valve Structure", "Nominal Pressure PN250 Valve pressure-temperature Grade in Appendix B" thiab "Butt welding end Size in Appendix C";
4, lub peev xwm ntawm daim ntawv thov nce qhov siab ntawm qib siab caliber thiab cov qauv ntawm lub valve npog yog lub tshuab kaw lub valve, qib siab ntawm lub valve nce PN16, PN63, cov xov sab hauv, kom ua tiav vuam valve txoj kab uas hla nce DN8 thiab DN65, flange thiab pob tw vuam valve txoj kab uas hla nce DN8, DN65, DN80, DN100;
5. Cov qauv tsim ntawm lub hauv siab sealing valve yog ntxiv rau cov lus dab neeg;
6. Lub siab-kub ntsuas ntawm PN250 valve tau teev nyob rau hauv Tshooj 5.1 yuav tsum ua raws li Daim Ntawv Ntxiv B;
7. Nyob rau hauv Tshooj 5.2 "Valve lub cev txuas kawg", ntu tau muab faib ua plaub ntu raws li daim ntawv txuas, thiab qhov ntev ntawm cov qauv ntawm lub valve nrog lub qhov (socket) vuam thiab cov xov txuas sab hauv yog kho dua, thiab qhov loj ntawm lub qhov (socket) vuam. thiab pob tw welding kawg yog teev;
8. Hauv Tshooj 5.4, cov kev cai ntxiv rau bolts thiab txiv ntseej siv hauv lub cev valve ntawm cov khoom sib txawv;
9. Nyob rau hauv Tshooj 5.5, cov lus piav qhia ntawm cov khoom tau hloov pauv, thiab cov kev cai ntawm cov khoom siv sab hauv uas sib haum rau cov khoom sib txawv ntawm lub cev tau ntxiv, nrog rau cov ntsiab lus ntawm cov kab me me sab hauv ntawm lub valve qia thiab cov kev cai ntawm cov xov ntawm lub cev. valve qia tau ntxiv;
10. Cov ntsiab lus ntawm ex-Factory soj ntsuam thiab daim ntawv xeem yog ntxiv nyob rau hauv 7.1 thiab 7.2.
3. Qhov sib txawv loj ntawm JB/T 7746-2006 thiab API 602 tus qauv
JB / T 7746-2006 tus qauv sib haum rau API 602-1998 "Flanged, threaded, welded thiab Lub cev elongated kev twb kev txuas ntawm lub compact steel rooj vag valve", tus qauv no thiab API 602-1998 qib ntawm kev sib xws tsis sib npaug, qhov sib txawv tseem ceeb yog raws li nram no:
1. Piv nrog API 602-1998, tus qauv no ntxiv lub ntiaj teb li qub thiab kos li qub rau cov hom valve network;
2. Piv nrog rau API 602-1998 tus qauv, cov chav nyob hauv tus qauv no txais yuav cov metric system;
3. Piv nrog API 602-1998, tus qauv no ntxiv cov kev cai rau qhov loj ntawm lub qhov (socket) thiab pob tw vuam xaus;
4. Tus txheeb ze rau API 602-1998, tus qauv no ntxiv cov txheej txheem ntev raws li qhov yuav tsum tau ua rau lub qhov (socket welding) thiab cov xov hauv lub qhov (socket) li qub;
5. Cov txheej txheem no tshem tawm cov ntsiab lus ntawm lengthening valve lub cev txuas ib feem hauv API 602-1998 tus qauv;
6. Cov txheej txheem no tshem tawm cov ntsiab lus cim hauv API 602-1998 tus qauv thiab hloov ncaj qha mus rau GB / T 12220 "Valve Marks";
7. Cov ntsiab lus ntawm Table 3 Siab-kub ntsuas rau rooj vag Valves rau 800 lb chav kawm hauv API 602-1998 tau ua kom zoo dua;
8. Cov qauv no tshem tawm cov khoom siv tshwj xeeb hauv Table 8 ntawm API 602-1998 tus qauv thiab cov ntsiab lus ntawm ASTM tus qauv;
9. Cov ntsiab lus qia cov ntsiab lus hauv Table 10 ntawm API 602-1998 yog qhov tsim nyog yooj yim hauv tus qauv no;
10, tus qauv no tshem tawm cov ntsiab lus ntawm tus lej foob thiab hloov tus lej foob hauv Table 11 ntawm API602-1998 tus qauv;
11. Cov txheej txheem no tshem tawm cov ntsiab lus ntawm Tshooj 6 kev xa khoom hauv API602-1998 tus qauv thiab siv JB/T 7928 "Valve Supply Requirements" standard;
12. Cov qauv no tau raug tsim nyog los ntawm Cov Ntawv Ntxiv A ntawm API602-1998, "Cov Lus Qhia Ntxiv rau Cov Khaub Ncaws Cov Khaub Ncaws Sealed Gate Valves", thiab muab tso rau hauv lub cev ntawm tus qauv.
13. Piv nrog API 602-1998, lub neej zoo li qub ntawm li qub tau teev tseg hauv tus qauv no;
14. Kev txheeb ze rau API 602-1998 tus qauv, tus qauv no ntxiv cov kev cai rau kev tshuaj xyuas thiab kev sim ntawm lub tshuab raj valve;
15 Piv nrog API 602-1998, tus qauv no ntxiv cov kev cai rau kev ntsuas lub neej zoo li qub, kev tshuaj xyuas lub Hoobkas thiab hom tshuaj xyuas li qub;
Iv. Cov teeb meem uas yuav tsum tau them sai sai rau thaum siv tus qauv no
Table 6 nyob rau hauv tus qauv no qhia qhov me me txoj kab uas hla ntawm lub qia, qhov twg qia txoj kab uas hla yog hais txog txoj kab uas hla ntawm tus ntoo khaub lig-sectional cheeb tsam ntawm lub qia los ntawm cov packing.