JIS G 3444: Cov kav hlau carbon rau cov qauv dav dav.
Nws qhia meej txog cov kev cai rau cov kav dej hlau carbon uas siv rau hauv kev tsim kho vaj tse thiab kev tsim kho, xws li cov pej thuam hlau, scaffolding, cov ncej hauv paus, cov ncej hauv paus, thiab cov ncej tiv thaiv kev plam.
STK 400cov yeeb nkab hlau yog ib qho ntawm cov qib feem ntau, nrog cov khoom siv kho tshuab ntawm alub zog tensile tsawg kawg nkaus ntawm 400 MPathiab ib qhoqhov tsawg kawg nkaus ntawm cov zis zog ntawm 235 MPa. Nws lub zog zoo thiab ruaj khovua rau nws haum rau ntau yam kev siv sib txawv.
Raws li qhov tsawg kawg nkaus tensile lub zog ntawm cov yeeb nkab hlau yog muab faib ua 5 chav kawm, uas yog:
STK 290, STK 400, STK 490, STK 500, STK 540.
Lub hom phiaj dav dav Sab nraud: 21.7-1016.0mm;
Cov pawg hauv paus thiab pawg rau kev tiv thaiv av qeeg OD: hauv qab 318.5mm.
| Lub cim ntawm qib | Lub cim ntawm cov txheej txheem tsim khoom | |
| Cov txheej txheem tsim cov yeeb nkab | Txoj kev ua tiav | |
| STK 290 | Tsis Muaj Qhov Txuas: S Hluav taws xob tsis kam welded: E Taub qab vuam: B Tsis siv neeg arc welded: A | Kub-tiav lawm: H Txias-tiav: C Raws li hluav taws xob tsis kam welded: G |
| STK 400 | ||
| STK 490 | ||
| STK 500 | ||
| STK 540 | ||
Cov raj yuav tsum tau tsim los ntawm kev sib xyaw ua ke ntawm txoj kev tsim cov raj thiab txoj kev ua tiav uas tau qhia.
Tshwj xeeb, lawv tuaj yeem muab faib ua xya hom hauv qab no, yog li xaiv hom tsim nyog raws li qhov xav tau sib txawv:
1) Cov yeeb nkab hlau tsis muaj seamless kub tiav lawm: -SH
2) Cov yeeb nkab hlau tsis muaj seamless txias: -SC
3) Raws li hluav taws xob tsis kam welded steel raj: -EG
4) Cov yeeb nkab hlau uas ua los ntawm hluav taws xob kub thiab tsis xeb: -EH
5) Cov yeeb nkab hlau uas ua los ntawm hluav taws xob uas txias thiab tsis xeb: -EC
6) Cov kav hlau uas vuam los ntawm lub pob tw: -B
7) Cov kav hlau uas siv arc welded tsis siv neeg: -A
| Cov Tshuaj Lom Zema% | |||||
| Lub cim ntawm qib | C (Cov pa roj carbon) | Si (Silicon) | Mn (Manganese) | P (Phosphorus) | S (Sulfur) |
| siab tshaj plaws | siab tshaj plaws | siab tshaj plaws | siab tshaj plaws | ||
| STK 400 | 0.25 | — | — | 0.040 | 0.040 |
| aCov khoom sib xyaw uas tsis suav nrog hauv lub rooj no thiab cov khoom uas qhia nrog "-" yuav raug ntxiv raws li qhov tsim nyog. | |||||
STK 400yog cov hlau uas muaj cov pa roj carbon tsawg nrog kev vuam zoo thiab ua haujlwm tau zoo rau cov ntawv thov kev tsim kho uas xav tau kev vuam. Phosphorus thiab sulfur raug tswj hwm ntawm qib qis los pab tswj hwm qhov kev tawv thiab kev ua haujlwm tau zoo ntawm cov khoom siv. Txawm hais tias cov nqi tshwj xeeb rau silicon thiab manganese tsis tau muab, lawv tuaj yeem hloov kho hauv cov kev txwv tso cai kom ua kom zoo dua cov khoom ntawm cov hlau ntxiv.
Lub Zog Tensile thiab Yield Point lossis Proof Stress
Lub zog tensile ntawm qhov vuam siv tau rau cov raj xa dej arc welded. Nws yog cov txheej txheem SAW welding.
| Lub cim ntawm qib | Lub zog tensile | Yield point los yog proof stress | Lub zog tensile hauv weld |
| N/mm² (MPA) | N/mm² (MPA) | N/mm² (MPA) | |
| feeb | feeb | feeb | |
| STK 400 | 400 | 235 | 400 |
Kev ntev ntawm JIS G 3444
Qhov ntev uas sib raug rau txoj kev tsim cov raj tau qhia nyob rau hauv Rooj 4.
Txawm li cas los xij, thaum qhov kev sim tensile raug ua rau ntawm Daim Ntawv Xeem No. 12 lossis Daim Ntawv Xeem No. 5 coj los ntawm lub raj hauv qab 8 hli hauv phab ntsa tuab, qhov elongation yuav tsum raws li Rooj 5.
Thaum sov li chav tsev (5 °C txog 35 °C), muab cov qauv tso rau nruab nrab ntawm ob lub phaj tiaj tiaj thiab nias kom ruaj kom lawv tiaj tiaj kom txog thaum qhov deb H ≤ 2/3D ntawm cov phaj, tom qab ntawd xyuas seb puas muaj qhov tawg hauv cov qauv.
Thaum sov li chav tsev (5 °C txog 35 °C), khoov cov qauv ncig lub tog raj kheej ntawm lub kaum sab xis tsawg kawg nkaus ntawm 90 ° thiab lub vojvoog sab hauv siab tshaj plaws tsis pub ntau tshaj 6D thiab xyuas cov qauv kom paub seb puas muaj kab nrib pleb.
Kev ntsuam xyuas hydrostatic, kev ntsuam xyuas tsis ua puas tsuaj ntawm cov welds, lossis lwm yam kev ntsuam xyuas yuav tsum tau pom zoo ua ntej ntawm cov kev cai cuam tshuam.
Kev kam rau sab nraud
Kev kam rau siab ntawm phab ntsa
Kev kam rau siab ntev
Ntev ≥ qhov ntev teev tseg
Cov nplaim sab hauv thiab sab nraud ntawm cov yeeb nkab hlau yuav tsum du thiab tsis muaj qhov tsis zoo uas tsis zoo rau cov kav dej.
Txhua lub yeeb nkab hlau yuav tsum tau muab cov ntaub ntawv hauv qab no sau rau.
a)Lub cim ntawm qib.
b)Lub cim rau txoj kev tsim khoom.
c)Qhov ntev.Yuav tsum cim qhov dav sab nraud thiab phab ntsa tuab.
d)Lub npe ntawm tus chaw tsim khoom lossis lub npe luv.
Thaum lub cim rau ntawm lub raj mis nyuaj vim tias nws txoj kab uas hla sab nraud me me lossis thaum tus neeg yuav khoom thov, lub cim yuav raug muab rau ntawm txhua pob ntawm cov raj mis los ntawm txoj kev tsim nyog.
Cov txheej txheem tiv thaiv xeb xws li cov txheej txheem nplua nuj zinc, cov txheej txheem epoxy, cov txheej txheem pleev xim, thiab lwm yam tuaj yeem siv rau sab nraud lossis sab hauv.
STK 400 muaj qhov sib npaug zoo ntawm lub zog thiab kev lag luam, ua rau nws zoo tagnrho rau ntau yam haujlwm engineering thiab kev tsim kho.
Cov kav hlau STK 400 feem ntau siv rau hauv kev lag luam kev tsim kho thiab tshwj xeeb tshaj yog siv ua cov khoom siv xws li cov kem, cov ntoo, lossis cov thav duab hauv cov tsev lag luam thiab cov tsev nyob.
Nws kuj tseem tsim nyog rau cov choj, cov qauv txhawb nqa, thiab lwm yam haujlwm uas xav tau lub zog nruab nrab thiab ruaj khov.
Nws kuj tseem siv tau los tsim cov ntaiv kev, cov thav duab cim qhia kev, thiab lwm yam chaw rau pej xeem.
Hauv kev tsim khoom, STK 400 siv tau los tsim cov thav duab thiab cov qauv txhawb nqa rau cov tshuab thiab khoom siv vim nws muaj peev xwm thauj khoom zoo thiab ua haujlwm tau zoo.
Thov nco ntsoov tias txawm hais tias cov qauv no zoo sib xws hauv kev siv thiab kev ua tau zoo, tej zaum yuav muaj qhov sib txawv me ntsis hauv cov tshuaj lom neeg tshwj xeeb thiab qee yam khoom siv kho tshuab.
Thaum hloov cov ntaub ntawv, cov kev cai tshwj xeeb ntawm cov qauv yuav tsum tau muab piv rau kom meej kom ntseeg tau tias cov ntaub ntawv xaiv yuav ua tau raws li cov qauv kev siv tshuab thiab kev nyab xeeb ntawm qhov project.
Txij li thaum nws tau tsim tsa xyoo 2014, Botop Steel tau dhau los ua tus thawj coj ntawm cov yeeb nkab carbon steel hauv Northern China, paub txog kev pabcuam zoo heev, cov khoom lag luam zoo, thiab cov kev daws teeb meem dav dav.
Lub tuam txhab muaj ntau yam yeeb nkab carbon steel thiab cov khoom lag luam cuam tshuam, suav nrog cov yeeb nkab seamless, ERW, LSAW, thiab SSAW steel, nrog rau cov yeeb nkab fittings thiab flanges tiav.
Nws cov khoom tshwj xeeb kuj suav nrog cov hlau alloys zoo thiab cov hlau stainless austenitic, tsim los ua kom tau raws li qhov xav tau ntawm ntau yam dej num pipeline.
