Mkarfe butututsarin yana da nau'i-nau'i hudu na bututun ƙarfe mai sassauƙa, Layer na ciki yana extruded bututun thermoplastic, ruwan watsawa daga hatimi;tsakanin yadudduka biyu na rufin bututun polyethylene mai cike da carbon, yana da juriya ga hasken ultraviolet na ikon wucin gadi, kuma don yin sarauta a tsaye na waje.Mafi girman Layer yana fitar da garkuwar waje mai kauri, don kiyaye gindin bututu daga tasirin waje.

Ƙayyadaddun ƙimar matsi na bututun ƙarfe mai sassauƙa ya shafi bi ka'idodin ANSI, kamar sa 300 daidai 5.15MPa;daraja 400 daidai .89MPa;10.3MPa m karfe sa 600 daidai zane tushen ne API17J17K da RP17B ƙasar M bututu zane bayani dalla-dalla kadan a cikin wani sabawa daga API bayani dalla-dalla, yi amfani da API17J rarraba hanyoyin da kayan, matsa lamba, tashin hankali da kuma lalacewa iyaka an wajabta kewayon.

An ƙirƙira gwajin daidai da daidaitaccen madaidaicin tashar APIRP17B don saduwa da buƙatun don kiyaye amincin tsarin, don tabbatar da buƙatun hatimin rufin ciki da waje da ke waje, kuma yana iya tabbatar da cewa ana jigilar kaya da matsawa zuwa tsarin bututu.Bayan fashewar samfurin tasha kayan aiki da gwajin tensile axial.