Matsi na Nominal (PN), Matsayin fam na Aji na Amurka (Lb), hanya ce ta bayyana matsin lamba, bambancin shine matsin lambar da suke wakilta yayi daidai da yanayin zafi daban-daban, tsarin PN na Turai yana nufin matsin lamba a 120 ° C. Matsi mai dacewa, yayin da CLass American Standard yana nufin matsin lamba mai dacewa a 425.5 ° C. Saboda haka, a cikin musayar injiniya, ba zai yiwu a yi kawai canza matsin lamba ba. Misali, CLass300 ya kamata ya zama 2.1MPa ta hanyar sauya matsin lamba mai sauƙi. Koyaya, idan an yi la'akari da zafin aiki, matsin lamba mai dacewa zai ƙaru. Dangane da gwajin zafin jiki da juriya na kayan. Ma'aunin yayi daidai da 5.0MPa.
Akwai nau'ikan tsarin bawuloli guda biyu: na farko shine tsarin "matsin lamba na musamman" wanda Jamus (ciki har da China) ke wakilta bisa matsin lamba na aiki da aka yarda a zafin ɗaki (digiri 100 a ƙasata da digiri 120 a Jamus). Na ɗaya shine "tsarin zafin jiki da matsin lamba" wanda Amurka ke wakilta, wanda matsin lamba na aiki da aka yarda a wani zafin jiki ke wakilta. A cikin tsarin zafin jiki da matsin lamba na Amurka, banda 150Lb, wanda ya dogara da digiri 260, sauran matakan sun dogara ne akan digiri 454. . Damuwar da aka yarda da ita ta ajin 150-psi (150psi=1MPa) mai lamba 25 na bawul ɗin ƙarfe mai lamba 25 shine 1MPa a digiri 260, kuma damuwar da aka yarda a zafin ɗaki ta fi 1MPa girma, kusan 2.0MPa. Saboda haka, gabaɗaya, matakin matsin lamba na asali wanda ya dace da Tsarin Amurka na 150Lb shine 2.0MPa, kuma matakin matsin lamba na asali wanda ya dace da 300Lb shine 5.0MPa, da sauransu. Saboda haka, ba za a iya canza matsin lamba na asali da zafin jiki da ma'aunin matsin lamba ba bisa ga dabarar canza matsin lamba.
PN lambar lamba ce da ta shafi matsin lamba da lambobi ke wakilta, kuma lamba ce mai zagaye mai dacewa don tunani. PN lambar MPa ce mai jure matsin lamba wacce ta yi daidai da yanayin zafi na yau da kullun, wanda shine matsin lamba na asali wanda yawanci ake amfani da shi ta hanyar amfani da shi.Bawuloli na ChinaDon bawuloli masu sarrafawa tare dabawul ɗin ƙarfe na carbonjiki, yana nufin matsakaicin matsin lamba na aiki da aka yarda idan aka yi amfani da shi ƙasa da 200°C; ga jikin bawul ɗin ƙarfe da aka jefa, yana nufin matsakaicin matsin lamba na aiki da aka yarda idan aka yi amfani da shi ƙasa da 120°C; Matsakaicin matsin lamba na aiki da aka yarda don aikace-aikace ƙasa da 250°C. Lokacin da zafin jiki na aiki ya tashi, juriyar matsin lamba na jikin bawul zai ragu. Bawul ɗin ma'aunin Amurka yana bayyana matsin lamba na asali a cikin fam, wanda shine sakamakon lissafi na haɗin zafin jiki da matsin lamba na wani ƙarfe, wanda aka ƙididdige shi bisa ga ma'aunin ANSI B16.34. Babban dalilin da yasa ajin fam da matsin lamba na asali ba daidai ba ne ɗaya-da-ɗaya shine tushen zafin jiki na ajin fam da matsin lamba na asali ya bambanta. Yawancin lokaci muna amfani da software don ƙididdigewa, amma kuma muna buƙatar sanin yadda ake amfani da tebura don duba sikelin. Japan galibi tana amfani da ƙimar K don nuna matakin matsin lamba. Don matsin lamba na iskar gas, a China, gabaɗaya muna amfani da naúrar taro "kg" don bayyana (maimakon "jin"), kuma naúrar shine kg. Na'urar matsi mai dacewa ita ce "kg/cm2", kuma kilogiram ɗaya na matsin lamba yana nufin cewa kilogiram ɗaya na ƙarfi yana aiki akan santimita murabba'i ɗaya. Hakazalika, daidai da ƙasashen waje, don matsin lamba na iskar gas, na'urar matsi da aka fi amfani da ita ita ce "psi", kuma na'urar ita ce "1 fam/inch2", wanda shine "fam a kowace murabba'in inch". Cikakken sunan Ingilishi shine Fam a kowace murabba'in inch. Amma ana amfani da shi sosai don kiran na'urar taro kai tsaye, wato, fam (Lb.), wanda a zahiri shine Lb. Wannan shine ƙarfin fam da aka ambata a baya. Ana iya ƙididdige shi ta hanyar canza dukkan raka'o'in zuwa raka'o'in ma'auni: 1 psi = fam 1/inch2 ≈0.068bar, 1 bar≈14.5psi≈0.1MPa, ƙasashe kamar Turai da Amurka ana amfani da su don amfani da psi a matsayin na'urar. A cikin Class600 da Class1500, akwai ƙima biyu daban-daban da suka dace da ma'aunin Turai da ma'aunin Amurka. 11MPa (wanda ya yi daidai da ajin fam 600) shine ƙa'idar tsarin Turai, wanda aka ƙayyade a cikin "ISO 7005-1-1992 Steel Flanges"; 10MPa (wanda ya yi daidai da ajin fam 600) shine ƙa'idar tsarin Amurka, wanda shine ƙa'idar a cikin ASME B16.5. Saboda haka, ba za a iya cewa cikakken ajin fam 600 ya yi daidai da 11MPa ko 10MPa ba, kuma ƙa'idodin tsarin daban-daban sun bambanta.
Akwai nau'ikan tsarin bawuloli guda biyu galibi: na farko shine tsarin "matsin lamba na musamman" wanda Jamus (ciki har da ƙasata) ke wakilta bisa ga matsin lamba na aiki da aka yarda a zafin ɗaki (digiri 100 a ƙasata da digiri 120 a Jamus). Na ɗaya shine tsarin "zafin jiki da matsin lamba" wanda Amurka ke wakilta, wanda aka wakilta ta hanyar matsin lamba na aiki da aka yarda a wani zafin jiki. A cikin tsarin zafin jiki da matsin lamba na Amurka, banda 150Lb, wanda ya dogara da digiri 260, sauran matakan sun dogara ne akan digiri 454. misali. Misali, matsin lamba da aka yarda na bawul ɗin ƙarfe na carbon 150Lb 25 shine 1MPa a digiri 260, kuma matsin lamba da aka yarda a zafin ɗaki ya fi 1MPa girma sosai, wanda yake kusan 2.0MPa. Saboda haka, gabaɗaya, matakin matsin lamba na asali wanda ya dace da Tsarin Amurka na 150Lb shine 2.0MPa, kuma matakin matsin lamba na asali wanda ya dace da 300Lb shine 5.0MPa, da sauransu. Saboda haka, ba za a iya canza matsin lamba na asali da zafin jiki da ma'aunin matsin lamba ba bisa ga dabarar canza matsin lamba.
Tunda tushen zafin matsi na asali da matsi sun bambanta, babu wata cikakkiyar daidaito tsakanin su biyun. An nuna rashin daidaito tsakanin su biyun a cikin tebur.
Lokacin Saƙo: Agusta-31-2023