API 5L umume nuduhake line pipe-API 5L pipe line, pipe line kanggo transportasi lenga, uap lan banyu dijupuk saka lemah kanggo Enterprises industri lenga lan gas liwat pipe line.Pipa baris kalebu pipa rapi lan pipa baja sing dilas.Ujung duwe ujung sing rata, ujung benang lan ujung soket;cara sambungan sing welding, sambungan kopling, sambungan soket, etc.
| PSL | Kahanan Pangiriman | Kelas pipa |
| PSL1 | As-rolled, normalized, normalizing kawangun | A |
| As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized lan tempered utawa yen disepakati mung Q&T SMLS | B | |
| As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized lan tempered | X42, X46, X52, X56, X60, X65, X70 | |
| PSL 2 | As-rolled | BR, X42R |
| Normalizing rolled, normalizing kawangun, normalized utawa normal lan tempered | BN, X42N, X46N, X52N, X56N, X60N | |
| Dibuwang lan dicekel | BQ, X42Q, X46Q, X56Q, X60Q, X65Q, X70Q, X80Q, X90Q, X100Q | |
| Thermomechanical rolled utawa thermomechanical kawangun | BM, X42M, X46M, X56M, X60M, X65M, X70M, X80M | |
| Termomekanik digulung | X90M, X100M, X120M | |
| Cukup (R, N, Q utawa M) kanggo gelar PSL2, kalebu kelas baja |
1. Proses produksi utama pipa baja seamless hot-rolled (proses inspeksi utama):
Persiapan lan pemeriksaan tabung kosong → pemanasan tabung kosong → tindikan → rolling tabung → pemanasan baja → diameter tetep (dikurangi) → perawatan panas △ → straightening tabung rampung → finishing → inspeksi (non-destruktif, fisik lan kimia, inspeksi Taiwan) → gudang
2. Proses produksi utama pipa baja seamless cold-rolled (digambar):
Persiapan billet → pelumasan pickling → rolling dingin (gambar) → perlakuan panas → straightening → finishing → inspeksi
