Kusiyana pakati pa miyezo ndi malo
GB/T 9948: Imagwira ntchito pa mapaipi achitsulo opanda msoko pa kutentha kwapakati ndi kwapamwamba (≤500℃) mongakusweka kwa mafutandizida za mankhwala, ndipo ndi ya muyezo wapadera wa chitoliro.
GB/T 5310: Yopangidwira makamakama boiler amphamvu kwambiri(magawo a nthunzi ≥9.8MPa), imagogomezera chitetezo cha nthawi yayitali pansi pa kutentha kwakukulu ndi kupanikizika kwakukulu ndipo ndiye muyezo waukulu wa machubu a boiler.
Kusiyana kwakukulu pa zinthu ndi magwiridwe antchito
Kapangidwe ka mankhwala
Poyerekeza ndi zitsulo 20,20GChitsulo chili ndi mphamvu yolamulira zinthu zodetsedwa (monga P≤0.025%, S≤0.015%), ndipo chimafuna kuti zinthu zonse zotsalira (Cu, Cr, Ni, ndi zina zotero) zikhale ≤0.70% kuti zitsimikizire kuti kutentha kwake kuli kokhazikika.
Katundu wa makina
Mphamvu yokoka ya 20G (410-550MPa) yofanana ndi kutentha kwa chipinda ikuoneka kuti ikugwirizana ndi ya chitsulo cha 20 (≥410MPa), koma 20G iyeneranso kutsimikizira mphamvu yolimba ya kutentha kwambiri pa 450℃ (≥110MPa), chomwe ndi chofunikira kwambiri pa machubu a boiler.
Kapangidwe kakang'ono
20G iyenera kufufuzidwa kuti ione ngati pali spheroidization grade ya pearlite (≤ grade 4) kuti ipewe kuwonongeka kwa microstructure pambuyo pa ntchito yayitali yotentha, pomwe chitsulo cha 20G sichili ndi lamulo lotere.
Kusiyana kwa njira zopangira
Chithandizo cha kutentha
20G iyenera kuchiritsidwa bwino (Ac3+30℃) kuti iwonetsetse kuti kukula kwa tinthu tating'onoting'ono ta kalasi 5-8 kuli bwino. Chitsulo 20 chikhoza kulumikizidwa kapena kusinthidwa kukhala chokhazikika, ndipo njira yowongolera zinthu imakhala yomasuka.
Kuyesa kosawononga
20G imafuna kuzindikira zolakwika za ultrasound payekhapayekha komanso kuyesa kwa eddy current pa chidutswa chilichonse, pomwe chitsulo cha 20G nthawi zambiri chimangofunika kuyang'aniridwa ndi zitsanzo.
Kuyerekeza zochitika za ntchito
20G: Ma boiler a siteshoni yamagetsi (makoma ozizira ndi madzi, ma superheater), ma reactor a mankhwala amphamvu kwambiri (zochitika zokhala ndi kutentha kofanana ndi 350℃)
Zitsulo 20: Mapaipi a chubu otenthetsera uvuni m'malo oyeretsera, mapaipi a mlengalenga ndi mayunitsi oyeretsera mpweya (nthawi zambiri kutentha kumakhala < 350℃)
Zofunikira pa Satifiketi
Mapaipi achitsulo a 20G ayenera kupeza Chilolezo Chapadera Chopangira Zipangizo (TS certification), ndipo gulu lililonse liyenera kupereka lipoti loyesa magwiridwe antchito otentha kwambiri. Mapaipi achitsulo a 20 amangofunika satifiketi yotsimikizira khalidwe nthawi zonse.
Malangizo osankha:
Ponena za mapulojekiti a satifiketi a ASME kapena PED, 20G ikhoza kufanana ndiSA-106B/ASTM A192, pomwe zitsulo 20 sizikugwirizana mwachindunji ndi zipangizo zokhazikika zaku America.
Pa ntchito yoposa 540℃, zitsulo za alloy monga 12Cr1MoVG ziyenera kuganiziridwa. Malire apamwamba a kutentha koyenera kwa 20G ndi 480℃ (mfundo yofunika kwambiri yogwiritsira ntchito graphitization ya carbon steel).
Nthawi yotumizira: Meyi-23-2025
