STPG 370 ndi mtundu wa mapaipi achitsulo chotsika mpweya womwe watchulidwa mu JIS G 3454 yokhazikika ku Japan.
STPG 370 ili ndi mphamvu yocheperako yogwira ntchito ya 370 MPa ndipo mphamvu yocheperako yogwira ntchito ya 215 MPa.
STPG 370 ikhoza kupangidwa ngati machubu achitsulo chosasunthika kapena machubu achitsulo cholumikizidwa pogwiritsa ntchito njira yolumikizira magetsi (ERW). Ndi yoyenera kugwiritsidwa ntchito m'mapaipi opanikizika okhala ndi kutentha kofika 350°C.
Kenako, tiona STPG 370 kuchokera ku njira zopangira, kapangidwe ka mankhwala, mawonekedwe a makina, mayeso a hydrostatic pressure, mayeso osawononga, ndi chophimba cha galvanized.
JIS G 3454 STPG 370 ikhoza kupangidwa pogwiritsa ntchitowopanda msoko or ERWnjira yopangira, pamodzi ndi njira zoyenera zomalizira.
| Chizindikiro cha giredi | Chizindikiro cha njira yopangira | |
| Njira yopangira mapaipi | Njira yomaliza | |
| STPG370 | Wopanda msoko: S Kukana kwamagetsi kolumikizidwa: E | Yomalizidwa ndi Kutentha: H Yomalizidwa ndi ozizira: C Monga kukana kwamagetsi kolumikizidwa: G |
Wopanda msokoakhoza kugawidwa m'magulu awa:
SH: Chitoliro chachitsulo chopanda msoko chomalizidwa ndi kutentha;
SC: Chitoliro chachitsulo chopanda msoko chomalizidwa ndi ozizira;
ERWakhoza kugawidwa m'magulu awa:
EH: Chitoliro chachitsulo cholumikizidwa ndi mphamvu yamagetsi yotenthedwa;
EC: Chitoliro chachitsulo cholumikizidwa ndi magetsi cholimba cholimba;
EG: Chitoliro chachitsulo cholumikizidwa ndi mphamvu yamagetsi kupatula chomwe chimatha kutentha ndi kuzizira.
JIS G 3454imalola kuwonjezera zinthu za mankhwala zomwe sizili patebulo.
| Chizindikiro cha giredi | C | Si | Mn | P | S |
| kuchuluka | kuchuluka | — | kuchuluka | kuchuluka | |
| JIS G 3454 STPG 370 | 0.25% | 0.35% | 0.30-0.90% | 0.040% | 0.040% |
STPG 370 ndi chitsulo chopanda mpweya wambiri malinga ndi kapangidwe kake ka mankhwala. Kapangidwe ka mankhwala ake kamapangidwa kuti kagwiritsidwe ntchito m'malo osapitirira 350°C, okhala ndi mphamvu zabwino, kulimba, komanso kukana kutentha kwambiri.
| Chizindikiro ya giredi | Kulimba kwamakokedwe | Poyambira kukolola kapena umboni wokhudza kupsinjika | Kutalikitsa mphindi, % | |||
| Chidutswa choyesera cha konkire | ||||||
| Nambala 11 kapena Nambala 12 | Nambala 5 | Nambala 4 | ||||
| N/mm² (MPA) | N/mm² (MPA) | Mayendedwe a mayeso a kukoka | ||||
| mphindi | mphindi | Kufanana ndi mzere wa chitoliro | Yolunjika ku axis ya chitoliro | Kufanana ndi mzere wa chitoliro | Yolunjika ku axis ya chitoliro | |
| STPT370 | 370 | 215 | 30 | 25 | 28 | 23 |
Kuwonjezera pa mphamvu yokoka, mphamvu yokoka, ndi kutalika komwe kwatchulidwa pamwambapa, palinso mayeso ophwanyika ndi kupindika.
Mayeso Ophwanyika: Pamene mtunda pakati pa mbale ziwirizo wafika pa mtunda wotchulidwa H, sipadzakhala zolakwika kapena ming'alu pamwamba pa chitoliro chachitsulo.
Kupindika: Chitolirocho chiyenera kupindika 90° pa utali wa mainchesi 6 akunja kwake. Khoma la chitolirocho liyenera kukhala lopanda zolakwika kapena ming'alu.
Chitoliro chilichonse chachitsulo chimayesedwa ndi hydrostatic kapena osawononga kuti chiwone ngati pali zolakwika zilizonse zomwe sizikuwoneka ndi maso.
Mayeso a Hydrostatic
Malinga ndi kuchuluka kwa makulidwe a khoma la chitoliro chachitsulo, sankhani mphamvu yoyenera ya madzi, isungeni kwa masekondi osachepera 5, ndipo yang'anani ngati chitoliro chachitsulo chikutuluka.
| Makulidwe a khoma lodziwika bwino | Nambala ya ndondomeko: Sch | |||||
| 10 | 20 | 30 | 40 | 60 | 80 | |
| Kuthamanga kochepa kwa mayeso a hydraulic, Mpa | 2.0 | 3.5 | 5.0 | 6.0 | 9.0 | 12 |
Tebulo lolemera la chitoliro chachitsulo cha JIS G 3454 ndi ndondomeko ya chitoliro zitha kuwonedwa podina ulalo wotsatirawu:
· Tchati cha Kulemera kwa Chitoliro cha Chitsulo cha JIS G 3454
· ndondomeko 10,ndondomeko 20,ndondomeko 30,ndondomeko 40,ndondomeko 60ndindondomeko 80.
Mayeso Osawononga
Ngati kuwunika kwa ultrasound kukugwiritsidwa ntchito, kuyenera kukhazikitsidwa pa muyezo wokhwima kuposa chizindikiro cha UD class mu JIS G 0582.
Ngati mayeso a eddy current agwiritsidwa ntchito, ayenera kukhazikitsidwa pa muyezo womwe ndi wokhwima kwambiri kuposa chizindikiro cha kalasi ya EY mu JIS G 0583.
Mu JIS G 3454, mapaipi achitsulo osaphimbidwa amatchedwamapaipi akudandipo mapaipi achitsulo opangidwa ndi galvanized amatchedwamapaipi oyera.
Chitoliro choyera: chitoliro chachitsulo cholimba
Chitoliro chakuda: chitoliro chachitsulo chosapangidwa ndi galvanized
Njira yogwiritsira ntchito mapaipi oyera ndi yakuti mapaipi akuda oyenerera amawomberedwa kapena kupakidwa kuti achotse zinyalala pamwamba pa chitoliro chachitsulo kenako amamatiridwa ndi zinki zomwe zimakwaniritsa muyezo wa JIS H 2107 wa giredi 1 osachepera. Zinthu zina zimachitika motsatira muyezo wa JIS H 8641.
Makhalidwe a zinc covering amawunikidwa motsatira zofunikira za JIS H 0401, Nkhani 6.
Kuyambira pomwe idakhazikitsidwa mu 2014,Chitsulo cha Botopwakhala 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.
Chitoliro chachitsulo chopanda msoko cha JIS G3455 STS370 Chothandizira Kupanikizika Kwambiri
Chitoliro cha JIS G 3461 STB340 Chopanda Msoko cha Chitsulo cha Carbon
Machubu a JIS G3444 STK 400 SSAW Carbon Steel Structure
Mapaipi a Zitsulo a JIS G3452 Carbon ERW a Paipi Yamba
Machubu achitsulo opanda msoko a JIS G 3441 Class 2 Alloy
JIS G3454 Carbon ERW Steel Pipe Pressure Service
Mapaipi a JIS G3456 STPT370 achitsulo chopanda msoko cha kaboni chothandizira kutentha kwambiri
