A fannin bututun ƙarfe na carbon, ASTM A500 Grade C daASTM A106 Darasi CMa'auni biyu ne da ake yawan ambaton su a kan kayan aiki. Duk da cewa dukkansu ƙarfe ne na carbon kuma suna da alaƙa da sunan "Matsayi na C", sun bambanta sosai a falsafar ƙira, hanyoyin kera kayayyaki, da yanayin aikace-aikace. Wannan labarin yana ba da cikakken kwatancen daga girma dabam-dabam, gami da ma'anoni na yau da kullun, abubuwan da suka shafi sinadarai, halayen injiniya, ƙayyadaddun girma, da muhalli masu dacewa.

1. Ma'anar Daidaitacce da Aikace-aikacen Farko

ASTM A500 - cikakken takenDaidaitaccen Bayani na Tubule Mai Tsarin Carbon Karfe Mai Sanyi da Zane mara Sumul a Zagaye da SiffofiKamar yadda sunan ya nuna, wannan ma'aunin bututun gini ne, wanda ya dace da bututun ƙarfe mai walda da aka yi da sanyi da kuma waɗanda ba su da matsala da ƙarfen carbon mai zagaye, murabba'i, murabba'i, da kuma siffar musamman. Ana amfani da shi galibi a cikin ginin firam, gadoji, da sauran gine-gine don haɗin haɗin walda, rivet, ko bolted. ASTM A500 ya ƙunshi maki A, B, C, da D, tare da maki C shine mafi girman ƙarfin da ake amfani da shi akai-akai.

ASTM A106 - cikakken takeTakamaiman Bayani na Musamman don Bututun Karfe na Carbon Mara Sumul don Ayyukan Zafi Mai GirmaWannan ma'aunin bututun matsin lamba ne mai zafi sosai, wanda ya shafi bututun ƙarfe na carbon marasa shinge kawai, wanda aka tsara musamman don isar da tururi, ruwa, da sauran hanyoyin sadarwa a ƙarƙashin yanayin zafi mai yawa da matsin lamba mai yawa. ASTM A106 ya ƙunshi maki A, B, da C, tare da maki C shine mafi girman ƙarfin.

Babban bambanci tsakanin jimla ɗaya: A500 Grade C bututu ne mai ɗaukar kaya; A106 Grade C bututu ne mai matsi don jigilar ruwa.

2. Tsarin Kera da Siffofin Samfura

Ma'auni biyu sun bambanta sosai a hanyar masana'anta da siffofi da ake da su:

Ikon A500 na rufe sassan murabba'i, murabba'i, da sauran sassan da ba na da'ira ba yana nuna kai tsaye girmansa - "a cikin Zagaye da Siffofi" - wanda A106 ba shi da shi.

3. Girman Girma

ASTM A500 Grade C: Ana amfani da shi ga bututun da ke kewaye da shi wanda bai wuce 2235 mm (inci 88) ba kuma kauri na bango bai wuce 25.4 mm (inci 1). Girman bututun murabba'i na yau da kullun na iya kaiwa inci 22 × 22. Juriyar kauri na bango: mafi ƙarancin kauri na bango da aka auna bai kamata ya zama ƙasa da kashi 90% na kauri na bango da aka ƙayyade ba.

ASTM A106 Grade C: Yana aiki ga bututun da ba su da matsala tare da girman bututun da ba a san su ba NPS ⅛ zuwa NPS 48 (DN 6 zuwa DN 1200), tare da kauri bango ga ASME B36.10M (jadawali 10 zuwa 160, XXH, da sauransu). Juriyar kauri bango: mafi ƙarancin kauri bango da aka auna ba zai zama ƙasa da 87.5% na kauri bango da aka ƙayyade ba.

4. Kwatanta Sinadaran

Bambance-bambancen da ke cikin sinadaran suna nuna takamaiman buƙatun aiki. A106 Grade C yana buƙatar silicon (Si ≥ 0.10%) don inganta juriyar zafi da juriyar iskar shaka, yayin da A500 Grade C ba shi da buƙatar silicon. A106 kuma yana sanya ƙa'idodi masu tsauri akan ƙazanta masu cutarwa kamar phosphorus da sulfur don tabbatar da aminci a ƙarƙashin sabis mai zafi da matsin lamba mai yawa.

Abin lura shi ne, sinadarin carbon da ke cikin A500 Grade C (0.27%) ya yi ƙasa da na A106 Grade C (0.35%), wanda hakan ke ba wa A500 Grade C ingantaccen damar walda kuma yana rage haɗarin fashewa yayin walda.

5. Kwatanta Halayen Inji

Manufofin ƙarfin sun bambanta: A500 Grade C yana da ƙarfin yawan amfanin ƙasa mafi girma, wanda hakan ya sa ya fi dacewa don tsayayya da nakasa ta dindindin a cikin tsarin, yayin da A106 Grade C yana da ƙarfin juriya mafi girma, yana nuna ikonsa na jure matsin lamba na ciki da hana fashewar fashewa.

A106 Grade C yana ba da ingantaccen sassauci, wanda hakan ya sa ya dace da lanƙwasawa, lanƙwasawa, da sauran ayyukan samar da bututu. A500 Grade C, a gefe guda, yana samun ƙarfinsa mai girma ta hanyar taurarewa a lokacin da ake yin sanyi.

6. Muhalli Masu Aiki da Lambobin Injiniya

Ana amfani da ƙa'idodi guda biyu a cikin yanayi daban-daban kuma suna bin lambobin ƙira daban-daban:

7. Jagororin Zaɓe

A cikin zaɓin kayan aikin injiniya, ana iya amfani da waɗannan ƙa'idodi:

1. Siffa ta farko: Idan zane ya buƙaci bututun murabba'i, murabba'i, ko na musamman, zaɓi ASTM A500 Grade C – A106 ba ya samar da waɗannan siffofi kwata-kwata.
2. Ga bututun da ke zagaye, yi la'akari da amfani da shi: Idan ginshiƙi ne na tsari, abin ƙarfafawa na diagonal, ko memba na truss wanda ke fuskantar nauyin iska, kayan aiki marasa inganci, ko wasu ƙarfin waje → zaɓi ASTM A500 Grade C. Idan kayan aiki ne na haɗa bututun tsari, wanda ke isar da ruwa mai tururi ko hydrocarbon a ƙarƙashin matsin lamba da zafin jiki mai yawa → zaɓi ASTM A106 Grade C.
3. Zafin Jiki: Don abubuwan da ke cikin tsarin zafin jiki na yanayi, zaɓi A500 Grade C; don tsarin bututun da za su yi aiki akai-akai a yanayin zafi mai girma (≥350°C), zaɓi A106 Grade C.

A takaice: don ɗaukar nauyin gini, yi amfani da A500 Grade C; don jigilar ruwa mai zafi, yi amfani da A106 Grade C. Ba za a iya musanya su ba a fannin injiniyanci.