Uji Mekanik Material Pipa SA-312 TP304L untuk Kualifikasi PQR Sesuai ASME BPVC Sec. IX-2019
DOI:
https://doi.org/10.31004/jptam.v7i2.7508Keywords:
Kualifikasi PQR, Pengujian Mekanikal, Test CouponAbstract
Sesuai ASME BPVC Sec.IX, Welding Procedure Specification (WPS) dinyatakan layak digunakan untuk proyek pengelasan dengan diikualifikasi dahulu menggunakan Procedure Qualified Record (PQR). Pengujian mekanikal dengan menimbulkan kerusakan untuk mengetahui ketahanan suatu material dengan cara ditekan, ditarik, dan dilengkungkan. Penelitian bertujuan mengetahui kualitas pengelasan dan rentang ketebalan material yang dapat dikualifikasi menggunakan test coupon pada PQR. Pengujian mekanikal yang dibutukan pada PQR ini yaitu dua spesimen tensile test dan empat spesimen bend test dengan acceptance criteria spesifikasi ASME BPVC Sec. IX-2019. Pada spesimen tensile test 1 dan 2, diketahui nilai ultimate tensile strength yaitu sebesar 584 MPa dan 594 MPa. Salah satu spesimen root bend pada bend test memiliki diskontinuitas terbuka di area weld sebesar 0.5 mm. Berdasarkan pada ASME BPVC Sec. IX-2019, nilai minimum yang diijinkan untuk tensile test pada material SA-312 TP304L yaitu sebesar 485 MPa, serta ukuran maksimum diskontinuitas terbuka yang diperbolehkan untuk bend test pada area weld dan HAZ, yaitu sebesar 3 mm.
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