Takaitaccen Bayani: Wannan labarin ya yi nazari kan ƙananan bayanai guda biyu a ƙarƙashin ASTM A106 Gr.B — 21.3×2.77mm (1/2″ SCH40/STD) da 26.7×2.87mm (3/4″ SCH40/STD) — yana nazarin yanayin aikace-aikacensu na duniya tare da mai da hankali kan amfani da ƙarshen kasuwa a Brazil. Masana'antar mai da iskar gas, man fetur, da wutar lantarki ta Brazil suna haifar da buƙatar waɗannan ƙayyadaddun bayanai, musamman don bututun kayan aiki, bin diddigin tururi, da haɗin musayar zafi. Duk da haka, masu fitar da kayayyaki na China suna fuskantar harajin hana zubar da kaya na dala 743 a kowace tan, wanda ke buƙatar tsarin shiga kasuwa da kyau.
I. Bayanin Samfura
ASTM A106 Gr.BTsarin bututun ƙarfe ne mai santsi wanda aka tsara a ƙarƙashin ƙa'idar American Society for Testing and Materials don hidimar zafi mai yawa. Mataki na B shine mafi girman matakin da aka ƙayyade, yana ba da haɗin ƙarfi da ƙarfin walda. Tsarin sinadarai na yau da kullun: C 0.17–0.24%, Si 0.17–0.37%, Mn 0.35–0.65%, tare da P da S duka ≤0.030%. Halayen injiniya sun haɗa da ƙarfin tauri na 410–550 MPa, wurin samarwa na 245 MPa, tsawaita 24%, da kewayon zafin sabis na −29°C zuwa 425°C.
Dukansu ƙayyadaddun bayanai sun faɗi cikin ƙaramin diamita na ASME B36.10M:
| Ƙayyadewa | Girman da Ba a San Shi Ba | Jadawalin Jadawalin | Nauyin Ka'ida |
| 21.3 × 2.77 mm | 1/2" (DN15) | SCH40 / STD | ~1.27 kg/m |
| 26.7 × 2.87 mm | 3/4" (DN20) | SCH40 / STD | ~1.68 kg/m |
Waɗannan su ne ƙananan girman bututun da aka fi amfani da su a tsarin bututun sarrafawa, waɗanda aka sanya su da yawa a cikin layukan kayan aiki, layukan samfura, bin diddigin tururi, da bututun sarrafawa marasa kwarara. Masu samar da kayayyaki na Brazil sun lissafa 21.3×2.77mm a matsayin samfurin mita 6 na yau da kullun wanda ke nauyin kilogiram 7.6 a kowane yanki, da kuma 26.7×2.87mm a matsayin bututun SCH40 mai girman 3/4″ a kilogiram 1.68/m2.
II. Kasuwannin Aikace-aikace na Duniya
Bututun A106 Gr.BYana aiki a fannoni daban-daban na masana'antu: watsa mai da iskar gas, tsarin watsa sinadarai, bututun tukunyar wutar lantarki, da kera injina, wanda ya shafi gine-ginen ƙarfe na gini, gina jiragen ruwa, gadoji, kayan aikin samar da wutar lantarki ta iska, injinan takarda, sanyaya, sarrafa abinci, da kuma adana ruwa. Ta hanyar yanayin aiki:
Bututun sarrafa bututun mai zafi da matsin lamba. Wannan shine babban aikace-aikacen. Ma'aunin ya shafi sabis na zafi mai zafi sosai, tare da amfani na yau da kullun ciki har da layukan tururi, na'urorin matatun mai, tsarin tukunyar jirgi da na'urorin dumama mai zafi, da wuraren sarrafa man fetur. Girman 1/2" da 3/4" galibi suna aiki azaman layukan motsa jiki na kayan aiki, bin diddigin tururi, layukan samfura, da bututun rassan ƙananan kwarara a cikin irin waɗannan tsarin.
Bututun taimako a ayyukan mai da iskar gas. Yayin da watsawa mai nisa ke mamaye taAPI 5L, A106 Gr.B ya sami amfani mai yawa a layukan tattarawa na filin, haɗin kan rijiyoyi, da kuma bututun matatun mai a cikin masana'antu. Bayanan ciniki sun nuna bututun mai mara shinge na 21.3mm OD × 2.77mm WT wanda aka keɓe musamman don bututun mai da iskar gas, yawanci tsawon mita 6.
Canja wurin ruwa na masana'antu gabaɗaya. A cikin wuraren sarrafa sinadarai, magunguna, da abinci, bututun A106 mai ƙaramin diamita yana sarrafa ruwa, iskar gas, da sinadarai, wani lokacin tare da murfin waje don haɓaka juriya ga tsatsa.
Tsarin gini da na injiniya. Ana amfani da ƙaramin bututu mara sumul a cikin layukan hydraulic, hannayen riga, da kayan aikin binciken ƙasa, wanda ke buƙatar daidaito mai girma da daidaiton halayen injiniya.
III. Binciken Kasuwar Brazil
3.1 Daidaita Ka'idoji
Ka'idojin fasaha na Brazil suna da daidaito a bayyane tare da ƙayyadaddun bayanai na ASTM. Ƙungiyar Ma'aunin Fasaha ta Brazil (ABNT) ta bayar da NBR 6321, daidai da ASTM A106, musamman don bututun ƙarfe mara tsari a cikin sabis mai zafi mai zafi; NBR 5590 yayi daidai daASTM A53don jigilar ruwa gabaɗaya. Wannan yana nufin bututun A106 Gr.B ya dace da tsarin ƙa'idodin cikin gida na Brazil ba tare da canzawa ko sake ba da takardar shaida ba.
Masu rarraba bututun Brazil sun bayyana matsayin A106 a sarari. Tubonasa, wani kamfanin rarraba bututun da ke São Paulo, ya bayyana cewa A106 yana "cikin masana'antar" - layukan tururi, na'urorin tacewa, da bututun sarrafa zafi mai yawa - yayin da API 5L ke kula da bututun jigilar kaya na nesa. Ma'aunin guda biyu suna aiki daban-daban kuma ba za a iya musanya su ba.
3.2 Manyan Sassan Aikace-aikace
Brazil, a matsayinta na ɗaya daga cikin manyan masu samar da mai da iskar gas a Latin Amurka, tana da fannin man fetur, tacewa, da wutar lantarki a matsayin manyan cibiyoyin buƙatar bututun A106 Gr.B mai ƙaramin diamita. Dangane da tushen masana'antar Brazil:
Matatun mai da masana'antun mai. Ana amfani da bututun A106 Gr.B a layukan sarrafa zafi mai yawa, haɗin musayar zafi, tsarin rarraba tururi, da bututun mai a cikin matatun mai. Bayanan siyan Petrobras sun nuna bututun A106-B mara matsala da aka ƙayyade don tsarin sarrafa matatun mai, tare da sigogin zafin jiki da matsin lamba na ƙira. Girman 21.3mm da 26.7mm suna hidimar layukan kayan aiki da bututun taimako - ƙarancin girman naúrar amma mai yawa a yawan amfani, wanda ya ƙunshi buƙatar kayan abinci.
Tsarin wutar lantarki da tukunyar jirgi. Tashoshin wutar lantarki na ruwa da na zafi na Brazil suna buƙatar bututun ƙarfe mai ƙarfi mai ƙarfi wanda ba shi da matsala don tsarin ciyar da ruwan tukunya, layukan tururi, da kuma da'irar kwantena. Matsakaicin aikin A106 Gr.B na −29°C zuwa 425°C ya ƙunshi yanayin aiki na tsarin tukunyar jirgi.
Sinadarai da Magunguna. A masana'antun sinadarai da magunguna na Brazil, bututun A106 mai ƙaramin diamita yana ɗaukar kwararar ruwa mai tsafta, haɗin reactor, da layukan amfani. Ana fifita ginin da ba shi da sulɓi inda ake buƙatar santsi na ciki da rashin ɗinkin walda.
Masana'antu da kayayyakin more rayuwa gabaɗaya. Cibiyoyin rarraba iskar gas na birni, layukan tururi da ruwan zafi a wuraren samar da abinci da abin sha, da bututun zagayawa ruwan zafi na HVAC suma suna haifar da buƙatar bututun A106 mai ƙaramin diamita.
3.3 Muhalli na Ciniki na Shigo da Kaya
Brazil babbar ƙasa ce da ke shigo da bututun ƙarfe mara shinge. A cewar bayanan Bankin Duniya na WITS, shigo da bututun da ba su da shinge (HS 7304) na Brazil a shekarar 2023 ya kai darajar dala miliyan 157, wanda ya wakilci kimanin tan 157,000 (dukkan diamita da ma'auni).
Duk da haka, masu fitar da kaya daga China suna fuskantar babban shingen ciniki. A ranar 24 ga Yuli, 2023, Hukumar Ciniki ta Ƙasashen Waje ta Brazil (GECEX) ta fitar da Kuduri Mai Lamba 497, inda ta ci gaba da harajin hana zubar da kaya akan bututun ƙarfe mara shinge daga China (diamita na waje ≤5 inci/141.3mm, don bututun mai da iskar gas, lambar harajin Mercosur 7304.19.00) akan farashin USD 743.00 a kowace tan na tsawon shekaru biyar. Wannan matakin harajin yana sanya matsin lamba mai yawa akan bututun A106 Gr.B na 21.3mm da 26.7mm. Dangane da kewayon farashin da aka yi amfani da shi na 2026 na USD 750–1,150 a kowace tan ga bututun A106 Gr.B mara shinge, harajin hana zubar da kaya yana wakiltar ƙarin nauyin farashi na 65–99%.
Abin lura shi ne, matakin hana zubar da shara ya rufe bututun ƙarfe mai santsi wanda ke da inci OD ≤5 (141.3mm) don amfani da bututun mai da iskar gas. Duk ƙayyadaddun bayanai na 21.3mm da 26.7mm sun faɗi daidai da wannan iyaka. A watan Yulin 2026, Brazil ta kuma fara binciken hana zubar da shara kan bututun ƙarfe mai walda daga China (lambobin kuɗin Mercosur 7305.11.00 da 7305.12.00), kodayake wannan yana nufin kayan da aka haɗa maimakon samfuran da ba su da matsala. Duk da haka, yanayin yana nuna ƙara tsaurara hanyoyin ciniki kan kayayyakin bututun ƙarfe na China.
IV. Babban Amfanin Ƙarshe a Brazil (Ra'ayin Ƙaramin Diamita)
Ta hanyar haɗa tsarin ƙa'idodin Brazil, bayanan aikace-aikacen masana'antu, da halayen ciniki na shigo da kaya, bututun 21.3×2.77mm da 26.7×2.87mm A106 Gr.B marasa shinge suna amfani da waɗannan manyan amfani na ƙarshe lokacin fitarwa zuwa Brazil:
Layukan kayan aiki da samfurin samfuri. Mafi yawan amfani da bututun da ba su da matsala a cikin matatun mai na Brazil, masana'antun mai, da wuraren sarrafa iskar gas shine bututun motsa jiki na kayan aiki da layukan samfurin sarrafawa. Waɗannan suna haɗuwa kai tsaye zuwa masu watsa matsi, mitar kwarara, da masu nazarin kan layi, suna buƙatar saman ciki mai tsabta, ma'auni daidai, da juriya ga zafin jiki da matsin lamba mai yawa. 21.3mm da 26.7mm sune girma biyu da aka fi amfani da su a cikin bututun kayan aiki.
Bin diddigin tururi da rarrabawa. Cibiyoyin tace mai na ƙasar Brazil suna amfani da bin diddigin tururi sosai don hana katsewar hanyoyin sarrafawa ko yin lu'ulu'u. Bututun A106 mai ƙaramin diamita yana aiki azaman rassan rarrabawa da layukan dawowa masu narkar da ruwa, tare da daidaita girma a layi tare da girman shuka.
Haɗin musayar zafi da na'urar sanyaya zafi. Masu musayar zafi, na'urorin sanyaya zafi, da na'urorin sake tafasa a sassan wutar lantarki da na man fetur na Brazil galibi suna amfani da bututun A106 Gr.B mai ƙaramin diamita mara shinge don sanyaya rassan ruwa, haɗin shiga tururi, da wuraren fitar da na'urar sanyaya iska.
Tsarin amfani da na'urori masu taimako. Layukan iska masu matsewa, bututun nitrogen, rassan rarraba tururi, da rassan tsarin ruwan wuta a masana'antun masana'antu na Brazil galibi suna amfani da bututun A106 Gr.B mai tsawon inci 1/2 da 3/4. Waɗannan aikace-aikacen suna da sauƙin amfani amma suna buƙatar rage matsin lamba da juriya ga zafin jiki, inda rabon aikin A106 Gr.B mai inganci yake da fa'ida.
V. Kalubalen Kasuwa da Dabaru Masu La'akari da su
Tasirin farashin hana zubar da kaya. Harajin hana zubar da kaya na dala 743/tan ya sanya bututun A106 na China mai ƙaramin diamita ya zama babban koma-baya ga farashin ƙasa idan aka kwatanta da kayan cikin gida na Brazil ko shigo da kaya daga Romania (kudin harajin USD 75.11/tan). Ga ƙayyadaddun ƙayyadaddun diamita na ƙananan diamita tare da ƙananan ƙimar naúrar, harajin yana wakiltar babban rabo na ƙimar samfura, wanda ke lalata gasa tsakanin farashi.
Takaddun shaida da bin ƙa'ida. Brazil tana buƙatar takardar shaidar INMETRO don kayayyakin bututun ƙarfe. Bututun A106 Gr.B da ake sayarwa a Brazil dole ne ya cika buƙatun alamar NBR 6321, gami da sunan masana'anta ko alamar kasuwanci, shaidar API Spec 5L mai dacewa, da alamar takardar shaidar INMETRO. Ya kamata masu fitar da kaya su tabbatar da cikakkun takaddun samfura, takaddun shaida na kayan aiki, da rahotannin dubawa na wasu kamfanoni don rage jinkirin kwastam.
Shawarwarin dabarun hanyoyin sadarwa. Ganin nauyin harajin da ake bin diddiginsa, masu fitar da kayayyaki na kasar Sin za su iya la'akari da: (1) kafa kawance na dogon lokaci tare da masu rarraba kayayyaki na Brazil don amfani da hanyoyin sadarwa na gida da na abokan ciniki don raba farashi; (2) bincika sassan aikace-aikacen da ba na mai da iskar gas ba (masana'antu na gabaɗaya, gini, sarrafa abinci) waɗanda ka iya faɗuwa ƙarƙashin rarrabuwar kuɗin fito daban-daban; (3) bin diddigin jadawalin bita na hana zubar da kaya a faɗuwar rana (matakin da ake amfani da shi a yanzu yana gudana har zuwa Yuli 2028) don lokacin shiga kasuwa.
VI. Kammalawa
Takaddun bayanai na 21.3×2.77mm da 26.7×2.87mm a ƙarƙashin ASTM A106 Gr.B suna ba da sabis na bututun sarrafawa mai zafi, layukan kayan aiki, da aikace-aikacen canja wurin ruwa na masana'antu a duk duniya. Brazil tana da buƙatar tsari ga waɗannan girma, waɗanda galibi ke haifar da bututun kayan aiki, bin diddigin tururi, da haɗin musayar zafi a fannin tacewa, sinadarai, da wutar lantarki. A fasaha, daidaito tsakanin A106 da NBR 6321 na Brazil yana kawar da shingayen ƙa'idodi; duk da haka, harajin hana zubar da kaya na USD 743/tan yana haifar da babban cikas ga kayayyakin China. Masu fitar da kaya dole ne su daidaita farashin bin ƙa'idodi, dabarun tashoshi, da matsayin samfura don cimma shiga mai ɗorewa a kasuwar Brazil.
Lokacin Saƙo: Oktoba-15-2026
