Kholis I. PENGUJIAN MEKANIK PADA KUALIFIKASI WPS/PQR SMAW WELDING PIPA API 5L X42 BERDASARKAN API 1104. sp [Internet]. 2015Dec.31 [cited 2024May11];5(4). Available from: http://ejurnal.ppsdmmigas.esdm.go.id/sp/index.php/swarapatra/article/view/159