I-ASTM A106 Gr.BUmbhobho wentsimbi engenamthungo ngumbhobho ongenamthungo wentsimbi yekhabhoni enobushushu obuphezulu kwi-American Society for Testing and Materials standard, edla ngokusetyenziselwa ukuthuthwa kolwelo phantsi kobushushu obuphezulu kunye noxinzelelo oluphezulu. Izixhobo ezihambelanayo eTshayina zibhekisa ikakhulu kwimigangatho yesizwe saseTshayina (GB) kunye nemigangatho yoshishino, kwaye kufuneka zihambelane kwiimbono ezintathu: ukwakheka kweekhemikhali, iimpawu zoomatshini, kunye neemeko zokusetyenziswa.

Ngokwesiqhelo kukho iindlela ezimbini zokuthelekisa izinto zasekhaya:

Izinto zokuqala ezihambelanayo: intsimbi engama-20 (GB/T 8163)
Intsimbi engama-20 yintsimbi eqhelekileyo yesakhiwo sekhabhoni, eyimpahla eqhelekileyo kumgangatho we-GB/T8163 kwaye ifanelekile ukuthuthwa kolwelo ngokubanzi. Uthelekiso lokwakheka kweekhemikhali: I-ASTM A106 Gr.B inomxholo wekhabhoni (C) oyi-0.17-0.24%, kunye ne-manganese (Mn) eyi-0.29-1.06%; Intsimbi engama-20 inomxholo wekhabhoni oyi-0.17-0.24%, kunye nomxholo we-manganese oyi-0.35-0.65%. Umxholo wekhabhoni wezi zimbini usondelelene, kodwa umxholo we-manganese we-ASTMA106 Gr.Binomda ophezulu ophezulu kunye nokusebenza ngcono kobushushu obuphezulu.
Uthelekiso lweempawu zoomatshini: I-ASTM A106 Gr.B inamandla okutsalwa kwe->415MPa kunye namandla okutsalwa kwe->240MPa; intsimbi engama-20 inamandla okutsalwa kwe->410MPa kunye namandla okutsalwa kwe->245MPa. Idatha iyafana kodwa amaqondo obushushu afanelekileyo ahlukile.
Imiqathango yokusetyenziswa: Intsimbi engama-20 ifanelekile kwiimeko zokusebenza ezinobushushu obungaphantsi kwama-350℃ kunye noxinzelelo oluphantsi. Ukuba isetyenziselwa ubushushu obuphezulu kunye noxinzelelo oluphezulu (njengemibhobho yebhoyila), kufuneka kukhethwe izinto ezisemgangathweni ophezulu.
Izinto zesibini ezihambelanayo: 20G (I-GB 5310)
I-20G yimbhobho yentsimbi engenamthungo yeebhoyila ezinoxinzelelo oluphezulu, ehambelana nomgangatho we-GB 5310 kwaye ifanelekile kwiinkqubo zomphunga ezinobushushu obuphezulu kunye noxinzelelo oluphezulu.
Uthelekiso lokwakheka kweekhemikhali:20Ginomxholo wekhabhoni ongu-0.17-0.24%, umxholo we-manganese ongu-0.35-0.65%, kunye nolawulo olungqongqo lomxholo we-phosphorus kunye ne-sulfur, ohambelana ngakumbi nezibonakaliso ze-ASTMA106 Gr.B.
Uthelekiso lweempawu zoomatshini: Amandla okutsalwa kwe-20G yi-≥410MPa, kwaye amandla ayo okuvelisa yi->245MPa, nto leyo efana kakhulu ne-ASTM A106 Gr.B, kwaye ubushushu obuvumelekileyo bokusebenza bufikelela kwi-450℃.
Iimeko zokusetyenziswa: I-20G isetyenziswa rhoqo kwimibhobho yebhoyila yezityalo zamandla obushushu kunye nezixhobo zoxinzelelo oluphezulu lweekhemikhali, kwaye ingathatha indawo ye-ASTM A106 Gr.B kwiimeko ezifanayo zokusebenza.
Amanyathelo okuthintela ukutshintshwa 1. Umahluko oqhelekileyo: I-ASTM A106 Gr.B ifuna uvavanyo lokutsalwa olunqamlezileyo kunye novavanyo lokuthamba, ngelixa i-GB/T 8163 ifuna uvavanyo lokutsalwa olude kuphela. Xa kutshintshwa, kuyimfuneko ukuqinisekisa ukuba izinto zovavanyo ziyahlangabezana neemfuno.
2. Iimfuno zonyango lobushushu: I-ASTM A106 Gr.B idla ngokuhanjiswa ikwimeko yokuqengqeleka okushushu, i-20G ifuna unyango oluqhelekileyo, kwaye inkqubo kufuneka ilungiswe ukuba itshintshwe.
3. Iimfuno zesatifikethi: Ukuba iprojekthi yokuthumela ngaphandle ichaza izinto ezisemgangathweni zaseMelika, kuyimfuneko ukuqinisekisa nomthengi ukuba ukutshintshwa komgangatho kazwelonke kuyamkelwa na. Ezinye iiprojekthi zinokufuna uhlolo olongezelelweyo lomntu wesithathu.
Ityala lesicelo esisebenzayo
Ishishini le-petrochemical lithenge imibhobho ye-ASTM A106 Gr.B yokuthutha ioyile kubushushu obuphezulu. Ngenxa yomjikelo omde wokuhambisa, yatshintshela kwizixhobo ze-20G. Emva kovavanyo lomntu wesithathu, ukuqina kwempembelelo (-20℃ KV2234J) kunye namandla obushushu obuphezulu (amandla okuvelisa>180MPa kwi-450℃) ye-20G yahlangabezana neemfuno zoyilo, kwaye iprojekthi yamkelwa.
Isishwankathelo
I-ASTM A106 Gr.B ingahambelana neentsimbi ezingama-20 (iimeko zokusebenza ngokubanzi) okanye i-20G (iimeko zokusebenza ezinobushushu obuphezulu kunye noxinzelelo oluphezulu) eTshayina. Xa kutshintshwa, kuyimfuneko ukudibanisa ubushushu obuthile, uxinzelelo kunye nemigangatho yovavanyo. Kucetyiswa ukuba kubekwe phambili izinto ezingama-20G, ezikhemikhali kunye nokusebenza kwazo kusondele kwiimfuno ezisemgangathweni zase-US kwaye zinoluhlu olubanzi lwezicelo.