| Daidaitawa | Bangaren kauri na waje diamita | |||
| ma'anarsa | Haƙuri na waje diamita | Hakuri kaurin bango | Rashin nauyi | |
| ASTM A53 | Uncoted da zafi tsoma galvanized welded da maras sumul maras muhimmanci karfe bututu | Don ƙananan bututun da ke ƙasa da ko daidai da NPS 1 1/2 (DN40), diamita na kowane wuri ba zai zama mafi girman ƙimar ƙimar 1/64 a cikin (0.4mm) ba, don bututun mara kyau wanda ya fi ko daidai da NPS2 (DN50), diamita na waje ba zai wuce daidaitaccen ƙimar ± 1% ba. | Matsakaicin kauri na bango a kowane wuri ba zai fi 12.5% girma fiye da ƙayyadadden kauri na bango ba. Mafi ƙarancin kauri na bango da aka bincika zai cika buƙatun a Teburin X2.4 | Nauyin bututu mai ƙima da aka ƙayyade a cikin Tables X2.2 da X2.3, ko nauyin da aka ƙididdige bisa tsarin da ya dace a cikin ASME B36.10M, ba za a karkatar da shi fiye da ± 10% ba. |
| ASTM A106 | High zafin jiki sumul carbon karfe maras muhimmanci bututu | 1/8-1 1/2 ± 0.4mm, 1 1/2-4 ± 0.79mm ＞4-8 ﹢1.59mm -0.79mm ＞8-18 ﹢2.38mm -0.79mm ＞18-26 ﹢3 3.79mm ﹣0.79mm;34-48 +4.76mm -0.79mm | Matsakaicin kaurin bango a kowane wuri bazai wuce 12.5% na ƙayyadadden kauri na bangon injiniyan ba | Nauyin kowane bututun ƙarfe ba zai wuce 10% ko fiye da nauyin da aka tsara ba, kuma kada ya zama ƙasa da 3.5% ko fiye. Sai dai in ba haka ba mai sayarwa da Xu Fang sun yarda, bututun ƙarfe tare da NPS na 4 da ƙarami ana iya auna su da kyau a batches. |
| API 5L | bututun bututu (masana'antar mai da iskar gas - bututun ƙarfe don tsarin sufuri na bututun mai |  | ||
Lokacin aikawa: Fabrairu-13-2025
