Gambaran Umum Struktur Pipa Petroleum Pipa Struktur Pipa Petroleum ASME SA106, ASME SA179, ASME SA192, ASME SA210, ASME SA213, ASME SA335, etc Kelas Struktur Pipa Minyak Bumi API 5L PSL1, PSL2 API 5L API 5L Gr.B X42 X52 X60 X65 X70 lsp API 5CT-2018 Casing lan Tubing API 5CT API 5CT J55, K55, N80, N80Q, lsp