JIS G 3452ndi muyezo wa ku Japan womwe umatchula chitoliro chachitsulo cha kaboni cholumikizidwa kuti chinyamule nthunzi, madzi, mafuta, gasi, mpweya, ndi zina zotero pa mphamvu zochepa zogwirira ntchito. JIS G 3452 ili ndi mtundu umodzi wokha, SGP, womwe ungapangidwe ndi resistance welding (ERW) kapena butt welding.
Mapaipi achitsulo a JIS G 3452 ayenera kupangidwa pogwiritsa ntchito njira zoyenera zopangira mapaipi ndi njira zomalizira.
| Chizindikiro ya giredi | Chizindikiro cha njira yopangira | Kugawa kwa zinki-kuphimba | |
| Njira yopangira mapaipi | Njira yomaliza | ||
| SGP | Kukana kwamagetsi kolumikizidwa: E Cholukidwa matako: B | Yomalizidwa ndi Kutentha: H Yomalizidwa ndi ozizira: C Monga kukana kwamagetsi kolumikizidwa: G | Mapaipi akuda: mapaipi osaphimbidwa ndi zinc Mapaipi oyera: mapaipi okhala ndi zinki |
Mapaipi nthawi zambiri amaperekedwa monga momwe amapangira. Mapaipi ozizira ayenera kutsekedwa pambuyo popangidwa.
Ngati chitolirocho chapangidwa ndi ERW, ma weld omwe ali mkati ndi kunja kwa chitolirocho ayenera kuchotsedwa kuti pakhale weld yosalala motsatira mzere wa chitolirocho.
Ngati pali zochepa chifukwa cha kukula kwa chitoliro kapena zida, ndi zina zotero, chosungunula chomwe chili mkati sichingachotsedwe.
Kukonzekera: Musanagwiritse ntchito galvanizing yotentha, pamwamba pa chitoliro chachitsulo payenera kutsukidwa bwino pothira mchenga, kusakaniza, ndi zina zotero.
Kukhuthala: Pakuphimba zinc, zinc ingot yosungunuka ya Class 1 yomwe yatchulidwa mu JIS H 2107 kapena zinc yokhala ndi khalidwe lofanana ndi ili iyenera kugwiritsidwa ntchito.
Zina: Zofunikira zina zonse pakupangira ma galvanizing zikugwirizana ndi JIS H 8641.
Mayeso: Kuyeza kufanana kwa chophimba chopangidwa ndi galvanized malinga ndi JIS H 0401 Nkhani 6.
Kuwonjezera pa zinthu zomwe zaperekedwa, zinthu zina zosakaniza zitha kuwonjezeredwa ngati pakufunika.
| Chizindikiro cha giredi | P (Phosphorus) | S (Sulfure) |
| SGP | pazipita 0.040% | pazipita 0.040% |
JIS G 3452 ili ndi zoletsa zochepa pa kapangidwe ka mankhwala chifukwa JIS G 3452 imagwiritsidwa ntchito makamaka pazinthu wamba monga kunyamula nthunzi, madzi, mafuta, ndi gasi wachilengedwe. Kapangidwe ka mankhwala a zinthuzo si chinthu chofunikira kwambiri, koma m'malo mwake ndi mphamvu ya makina a chitoliro kuti chipirire kuthamanga kwa ntchito.
Katundu Wokoka
| Chizindikiro cha giredi | Kulimba kwamakokedwe | Kutalika, mphindi, % | ||||||
| Chidutswa choyesera | Mayeso njira | Makulidwe a khoma, mm | ||||||
| N/mm² (MPA) | ＞3 ≤ 4 | ＞4 ≤ 5 | ＞5 ≤ 6 | ＞6 ≤ 7 | ＞7 | |||
| SGP | Mphindi 290 | Nambala 11 | Kufanana ndi mzere wa chitoliro | 30 | 30 | 30 | 30 | 30 |
| Nambala 12 | Kufanana ndi mzere wa chitoliro | 24 | 26 | 27 | 28 | 30 | ||
| Nambala 5 | Yolunjika ku axis ya chitoliro | 19 | 20 | 22 | 24 | 25 | ||
Pa mapaipi okhala ndi mainchesi 32A kapena pansi pake, kuchuluka kwa kutalika komwe kuli patebuloli sikugwira ntchito, ngakhale kuti zotsatira zake zoyesa kutalika ziyenera kulembedwa. Pankhaniyi, kufunika kwa kutalika komwe kwavomerezedwa pakati pa wogula ndi wopanga kungagwiritsidwe ntchito.
Malo Okhazikika
Chigawo: Cha machubu okhala ndi mainchesi opitilira 50A (2B).
Palibe ming'alu pamene chubucho chaphwanyika kufika pa 2/3 ya m'mimba mwake wakunja kwa chubucho.
Kupindika
Chigawo: Cha machubu achitsulo okhala ndi mainchesi ≤ 50A (2B).
Pindani chitsanzocho pa 90° ndi utali wamkati wowirikiza kasanu ndi kamodzi kuposa m'mimba mwake wakunja kwa chitoliro popanda kupanga ming'alu.
Chitoliro chilichonse chachitsulo chiyenera kukhala ndi mayeso a hydrostatic pressure kapena mayeso osawononga.
Mayeso a Hydrostatic
Kupanikizika: 2.5 MPa;
Nthawi: Gwirani kwa masekondi osachepera 5;
Chiweruzo: chitoliro chachitsulo chili pansi pa kupanikizika popanda kutayikira.
Mayeso Osawononga
Kuyesa kwa ultrasound komwe kwatchulidwa mu JIS G 0582 kudzagwira ntchito. Mulingo woyeserera ukhoza kukhala wovuta kwambiri kuposa Gulu la UE.
Kuyesa kwa eddy current komwe kwatchulidwa mu JIS G 0583 kudzagwira ntchito. Mulingo wa mayesowo ukhoza kukhala wovuta kwambiri kuposa Gulu EZ.
Pa mapaipi okhala ndi mainchesi okwana ≥ 350A (14B), werengerani mainchesi poyesa kuzungulira, pomwe kulekerera ndi ± 0.5%.
Mtundu wa mapeto a chitoliro cha DN≤300A/12B: mapeto opangidwa ndi ulusi kapena athyathyathya.
Mtundu wa mapeto a chitoliro cha DN≤350A/14B: mapeto athyathyathya.
Ngati wogula akufuna mbali yopindika, ngodya ya bevel ndi 30-35°, m'lifupi mwa bevel ya m'mphepete mwa chitoliro chachitsulo: osapitirira 2.4mm.
JIS G 3452 ili ndi zofanana muASTM A53ndiGB/T 3091, ndipo zipangizo za chitoliro zomwe zafotokozedwa mu miyezo iyi zitha kuonedwa kuti ndizofanana malinga ndi momwe zimagwirira ntchito komanso momwe zimagwiritsidwira ntchito.
Kuyambira pomwe idakhazikitsidwa mu 2014, Botop Steel yakhala kampani yotsogola yogulitsa mapaipi achitsulo cha kaboni kumpoto kwa China, yodziwika bwino chifukwa cha ntchito zabwino kwambiri, zinthu zapamwamba, komanso mayankho omveka bwino.
Kampaniyo imapereka mapaipi osiyanasiyana achitsulo cha kaboni ndi zinthu zina zokhudzana nazo, kuphatikizapo mapaipi achitsulo opanda msoko, ERW, LSAW, ndi SSAW, komanso mndandanda wathunthu wa zolumikizira mapaipi ndi ma flange. Zogulitsa zake zapadera zimaphatikizaponso zitsulo zapamwamba kwambiri ndi zitsulo zosapanga dzimbiri za austenitic, zopangidwa kuti zikwaniritse zosowa za mapulojekiti osiyanasiyana a mapaipi.
Lumikizanani nafe, gulu la akatswiri lili okonzeka kukupatsani ntchito zabwino komanso mayankho abwino, likuyembekezera kugwirizana nanu bwino, ndikutsegula limodzi mutu watsopano wa chipambano.
