ASTM A312 TP304N Bututun Bakin Karfe Mai Walda: Ƙarfin Kerawa & Bayanin Samfura

Ƙasa:Brazil (Basin Campos, bakin tekun Rio de Janeiro)
Daidaitacce & Matsayi:ASTM A312 TP304N (an haɗa shi da walda)
Girma da Adadi:

• OD 219.1mm (8″) × Jadawalin 10S (3.76mm WT) – mita 1,200 (kimanin tan 28) – Tsarin EFW
• OD 168.3mm (6″) × Jadawalin 10S (3.40mm WT) – mita 1,800 (kimanin tan 22) – Tsarin ERW
• OD 114.3mm (4″) × Jadawalin 10S (3.05mm WT) – mita 2,500 (kimanin tan 20) – Tsarin ERW
• OD 60.3mm (2″) × Jadawalin 10S (2.77mm WT) – mita 3,000 (kimanin tan 12) – Tsarin ERW
• OD 406.4mm (16″) × Jadawalin 10S (4.78mm WT) – mita 300 (kimanin tan 12) – Tsarin EFW (ginshikan gini)

Jimilla:Mita 8,800 (kilomita 8.8), kimanin tan 94

Bayani dalla-dalla:Maganin ASTM A312 TP304N wanda aka shafa a hankali kuma aka yi masa tsami, aka yanke ƙarshensa. Gwajin Hydrostatic. 100% UT don bututun EFW, wutar lantarki ta ERW. PMI akan kowane bututu. Gwajin tensile (yawan amfani ≥ 275 MPa, an cimma 310-340 MPa; tensile ≥ 550 MPa, an cimma 580-620 MPa). Tasirin Charpy a -20°C (min 27J, an cimma 100-150J). Gwajin tsatsa tsakanin granular ga ASTM A262 Practice E (wucewa). Dubawa ta ɓangare na uku ta DNV Brazil.

Aikace-aikace:Bututun bututun da ke saman bene da kuma tallafin tsarin gini don wani dandamalin samar da kayayyaki a yankin Campos. Manhajojin bututun suna samar da ruwa da iskar gas mai ƙarancin ƙarfi a zafin 50-80°C tare da ƙarancin sinadarin chloride (ruwan da aka yi wa magani). Tallafin tsarin an yi shi ne don skid na kayan aiki da rack na bututu. Dandalin yana buƙatar rage nauyi don tsawaita rayuwarsa (damuwar gajiya). An zaɓi TP304N saboda ƙarfinsa na 35% mafi girma, wanda ya ba da damar ganuwar siriri (Jadawalin 10S maimakon Jadawalin 40S) ga duka bututu da kuma membobin gini.

Yanayin Injiniya:An ƙera dandamalin ne da farko don bututun 304. Ta hanyar haɓakawa zuwa TP304N da rage kauri daga Jadawali 40S (4.55-8.18mm) zuwa Jadawali 10S (2.77-4.78mm), ƙungiyar injiniyan ta cimma raguwar nauyi da kashi 45% akan bututun da kuma rage nauyi da kashi 30% akan kayan tallafi na gine-gine - jimillar tanadin nauyi na tan 35 (27% na nauyin asali). Wannan ya ba da damar dandamalin ya kasance cikin kasafin kuɗin nauyinsa na sama.

Kalubalen Fasaha da Magani:

• Rage nauyi ba tare da rage matsin lamba ba– Ƙarfin samar da iska mai ƙarfi na TP304N ya ba da damar ganuwar siriri ga ASME B31.3. Don bututun mai inci 8, Jadawalin 10S (3.76mm) ya maye gurbin Jadawalin 40S (8.18mm), yana rage nauyi da 54%. Womic ta bayar da takardar shaida mai girma da rahotannin gwajin matsin lamba. Gwajin Hydrostatic a 3.0 MPa ya wuce (matsin ƙira 1.8 MPa, matsin lamba na gwaji 2.7 MPa).
• Daidaita ƙarfin ƙarfe na walda– Karfe na walda na ERW da EFW dole ne su kasance suna da ƙarfi daidai da ƙarfe na tushe. Sigogin ERW da aka inganta na Womic don cimma ingancin haɗin walda na 95% (ƙarfin tensile 560 MPa idan aka kwatanta da tushe 590 MPa). Walda na EFW ta amfani da cika ER308 sun sami ingancin haɗin gwiwa 100%. Duk gwaje-gwajen tensile na walda sun ci nasara.
• Juriyar tsatsa a raguwar kauri na bango– Ganuwa masu siriri ba su da isasshen iskar tsatsa. Ruwan da ake samarwa yana da ƙarancin sinadarin chloride (<50 ppm) tare da pH 6.5-7.5, don haka ƙimar tsatsa tana da ƙasa. TP304N yana da ɗan juriya ga tsatsa fiye da 304 saboda nitrogen. Womic ta yi gwajin tsatsa na ASTM G48 (awanni 24 a 22°C) – babu tsatsa. An karɓi abokin ciniki.
• Tsarin tallafin gini ta amfani da TP304N– Ginshiƙan tsarin 16″ sun yi amfani da Jadawali 10S (4.78mm) maimakon Jadawali 40S (9.53mm). Binciken abubuwan da suka ƙare (FEA) ya tabbatar da cewa bangon siriri tare da ƙarfin yawan amfanin ƙasa mafi girma na TP304N ya samar da daidai ƙarfin kaya. Womic ta ba da haƙurin madaidaiciya ≤ 0.15% don daidaiton ginshiƙi.
• Tsarin walda na filin don TP304N– Ƙungiyar kula da dandamali ta buƙaci gyara bututun yayin shigarwa. Womic ta samar da WPS ta amfani da GTAW tare da cika ER308, shigarwar zafi ≤ 1.8 kJ/mm, interpass ≤ 150°C. Takardun walda 20 sun wuce gwajin RT, PT, da tensile.
• Kayan aiki zuwa Campos Basin– An aika bututu daga Shanghai zuwa Rio de Janeiro, sannan aka kai su wani dandamali na teku ta hanyar jirgin ruwa mai jigilar kayayyaki. DNV ta duba bututun yayin da ake lodi. Duk tan 94 da aka kawo a cikin jigilar kaya biyu cikin makonni 5.

Sakamako:An sanya bututun saman dandamali da tallafin tsarin a kwata na biyu na 2024. Rage nauyin tan 35 ya ba dandamalin damar cika iyakokin nauyin saman ba tare da buƙatar ƙarfafa tsarin ba. Bayan watanni 12 na aiki, dubawa ya nuna babu lalacewar tsatsa ko walda. Mai aiki yana shirin amfani da TP304N don haɓaka dandamali a nan gaba don rage nauyi da tsawaita rayuwar kadarori. Womic Steel yanzu ta zama mai samar da kayayyaki masu inganci ga buƙatun bututun bakin ƙarfe na wannan mai aiki.

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Womic Steel – Abokin hulɗarka mai aminci ga bututun ƙarfe mai walda na ASTM A312 TP304N don jiragen ruwa masu matsin lamba, dandamali na ƙasashen waje, aikace-aikacen tsari, da tsarin sinadarai masu matsin lamba mai yawa a duk duniya.