API 5L gabaɗaya yana nufin bututun layi-API 5L bututun layin, bututun layin shine jigilar mai, tururi da ruwan da aka hako daga ƙasa zuwa masana'antar mai da iskar gas ta bututun layi.Bututun layin ya hada da bututu maras sumul da bututun karfe mai walda.Ƙarshen suna da ƙyalli masu lebur, ƙullun zaren da ƙullun soket;hanyoyin haɗin suna walda, haɗin haɗin gwiwa, haɗin soket, da dai sauransu.
| PSL | Yanayin Bayarwa | Matsayin bututu |
| PSL1 | Kamar yadda aka yi birgima, an daidaita, an daidaita shi | A |
| Kamar yadda aka yi birgima, normalizing birgima, birgima na thermomechanical, ƙirar thermo-mechanical, daidaita tsari, daidaitawa, daidaitawa da fushi ko kuma idan an yarda Q&T SMLS kawai. | B | |
| Kamar yadda aka yi birgima, daidaitawa, birgima, birgima na thermomechanical, ƙirar thermo-mechanical, daidaitawa kafa, daidaitawa, daidaitawa da fushi. | X42, X46, X52, X56, X60, X65, X70 | |
| Farashin PSL2 | Kamar yadda aka yi birgima | BR, X42R |
| Normalizing birgima, daidaita tsari, daidaitawa ko daidaitawa da fushi | BN, X42N, X46N, X52N, X56N, X60N | |
| An kashe da fushi | BQ, X42Q, X46Q, X56Q, X60Q, X65Q, X70Q, X80Q, X90Q, X100Q | |
| Thermomechanical birgima ko thermomechanical kafa | BM, X42M, X46M, X56M, X60M, X65M, X70M, X80M | |
| Thermomechanical birgima | X90M, X100M, X120M | |
| Isasshen (R, N, Q ko M) don maki PSL2, na da darajar karfe |
1. Babban tsarin samar da bututun ƙarfe mara nauyi mai zafi (tsarin dubawa):
Tube blank Shirye-shiryen da dubawa → tube blank dumama → huda → tube rolling → karfe reheating → gyarawa (rage) diamita → zafi magani △ → kammala bututu → gamawa → dubawa (ba lalacewa, jiki da sinadarai, Taiwan dubawa) → warehousing
2. Babban tsarin samarwa na bututun ƙarfe mara nauyi (wanda aka zana) mai sanyi:
Shirye-shiryen billet →mai shafa mai → sanyin birgima (zane) →maganin zafi → mikewa → gamawa → dubawa
