ASTM A333 Aji na 6wani abu ne da ake amfani da shi wajen yin bututun ƙarfe na carbon wanda ake amfani da shi wajen yin cryogenic da sauran aikace-aikace da ke buƙatar tauri mai ƙarfi. Ana iya amfani da shi a wurare masu ƙarancin ƙasa kamar -45°C (-50°F) kuma yana samuwa a cikin nau'ikan da ba su da matsala da kuma waɗanda aka haɗa.
Ana iya amfani da ASTM A333 a cikin masana'antar lantarkitsari mara sumul ko wanda aka haɗa.
Tsarin bututun ƙarfe mara shinge an raba shi zuwa ƙarshen zafi da kuma zanen sanyi. Kuma yana buƙatar a nuna shi a sama da alamar.
Bututun ƙarfe marasa sumul su ne zaɓi na farko don yanayi mai wahala, yanayi mai wahala, da kuma lokacin da ake buƙatar bututu masu kauri sosai.
Dole ne a yi amfani da ASTM A333 GR.6 ta hanyar ɗaya daga cikin hanyoyin da za a bi don sarrafa tsarinsa:
● Daidaita yanayi: A dumama zuwa yanayin zafi iri ɗaya na akalla 1500 °F [815 °C], sannan a sanyaya a cikin iska ko a cikin ɗakin sanyaya tanderu mai sarrafa yanayi.
● Gyaran jiki bayan daidaita shi: Bayan daidaita shi, ana iya sake dumama shi zuwa yanayin zafin da ya dace bisa ga shawarar masana'anta.
● Don aiwatarwa ba tare da wata matsala ba, ana iya cimma wannan ta hanyar sarrafa yanayin zafin aikin zafi da ayyukan kammalawa mai zafi ta yadda zafin ƙarshe zai iya kasancewa daga 1550 zuwa 1750 °F [845 zuwa 945 °C] sannan a sanyaya a cikin iska ko a cikin tanderu mai sarrafa yanayi daga zafin farko na akalla 1550 °F [845 °C].
● Ana iya sake dumamawa bayan an sarrafa aikin zafi da kuma kammala aikin zafi zuwa yanayin zafi da ya dace bisa ga shawarar masana'anta.
● Kashewa da kuma dumama jiki: Maimakon duk wani magani da aka ambata a sama, ana iya magance bututun da ba su da matsala na maki 1, 6, da 10 ta hanyar dumama su zuwa yanayin zafi iri ɗaya na akalla 1500 °F [815 °C], sannan a kashe su a cikin ruwa sannan a sake dumama su zuwa yanayin zafi da ya dace.
AGa kowace raguwar kashi 0.01% na carbon da ke ƙasa da kashi 0.30%, za a ba da damar ƙaruwar kashi 0.05% na manganese da ke sama da kashi 1.06% zuwa matsakaicin kashi 1.35% na manganese.
CTa hanyar yarjejeniya tsakanin masana'anta da mai siye, ana iya ƙara iyakar niobium zuwa 0.05% akan nazarin zafi da 0.06% akan nazarin samfur.
DKalmomin Niobium (Nb) da Columbium (Cb) sunaye ne na daban ga abu ɗaya.
Kadarar Tashin Hankali
| Matsayi | Ƙarfin tauri | Ƙarfin samarwa | Ƙarawa | |
| a cikin inci 2 ko 50 mm, minti, % | ||||
| Tsawon lokaci | Mai wucewa | |||
| ASTM A333 Aji na 6 | 415 MPa [60,000 psi] | 240 MPa [35,000 psi] | 30 | 16.5 |
Tsawaita a nan shine kawai mafi ƙarancin mahimmanci.
Sauran Gwaje-gwaje
ASTM A333 yana da gwajin lanƙwasa, gwajin tasiri, ban da gwajin tauri.
Ga yanayin zafi na gwajin tasiri na aji 6:
| Matsayi | Zafin Tasiri | |
| ℉ | ℃ | |
| ASTM A333 Aji na 6 | - 50 | - 45 |
Kowace bututu za a yi mata gwajin lantarki ko na hydraulic wanda ba zai lalata ta ba.
Gwajin Hydrostatic:ASTM A999Za a cika sashe na 21.2;
Gwajin lantarki mara lalatawa: zai dace da buƙatun ASTM A999, Sashe na 21.3;
Daidaitacce: ASTM A333;
Daraja: Daraja ta 6 ko GR ta 6
Nau'in Bututu: Bututun ƙarfe mara sumul ko na walda;
Girman SMLS na SMLS: 10.5 - 660.4 mm;
Jadawalin Bututu: SCH10, SCH20, SCH30, SCH40, SCH60, SCH80, SCH100, SCH120, SCH140 da SCH160.
Ganewa: STD, XS, XXS;
Rufi: Fenti, varnish, 3LPE, FBE, 3LPP, HDPE, galvanized, mai arzikin epoxy zinc, mai nauyin siminti, da sauransu.
Marufi: Zane mai hana ruwa shiga, akwatin katako, bel ɗin ƙarfe ko haɗin waya na ƙarfe, mai kariya daga ƙarshen bututun filastik ko ƙarfe, da sauransu. An keɓance shi.
Kayayyakin Daidaitawa: Ana samun lanƙwasa, flanges, kayan haɗin bututu, da sauran samfuran daidaitawa.
