An raba bututun ƙarfe zuwa bututun ƙarfe marasa sumul da bututun ƙarfe da aka haɗa da welded (bututun da aka haɗa).

Bututun tukunya wani nau'in bututu ne mara sumul. Hanyar kera shi iri ɗaya ne da na bututu mara sumul, amma akwai ƙa'idodi masu tsauri kan matakan ƙarfe da ake amfani da su don kera bututun ƙarfe. Dangane da zafin amfani, ana iya raba shi zuwa bututun tukunya na gabaɗaya da bututun tukunya mai matsin lamba mai yawa.

1) Matakan ƙarfe na ƙarfe mai inganci na carbon sune 20G, 20MnG da 25MnG.

2) Ajin ƙarfe mai ƙarfe mai ƙarfe 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, da sauransu.

Bututun Karfe Mara Sumul don Boilers Masu Ƙarfi da Matsakaici (GB3087-2008), Bututun Karfe Mara Sumul don Boilers Masu Matsi Mai Girma (GB5310-2008), ASME SA-106, ASME SA-213, ASTM A335

Bugu da ƙari, kamfaninmu yana aiki da bututun ƙarfe marasa tsari don gine-gine (GB/T 81628163), bututun ƙarfe marasa sulɓi don fashewar man fetur (GB9948), bututun ƙarfe marasa sulɓi don takin zamani mai matsin lamba (GB6479), bututun bututun mai (API 5L) da bututun mai (API 5CT), da kuma kayan haɗin bututun ƙarfe.