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All Journal JMPM (Jurnal Material dan Proses Manufaktur) JUTEKS JuTEkS (Jurnal Teknik Elektro dan Sains) Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti
Iwan Sumirat
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PROTOTIPE MESIN POST WELD HEAT TREATMENT (PWHT) BERBASIS PROGRAMMABLE LOGIC CONTROLLER (PLC) MITSUBISHI FX2N 48MT Wawan Kurniawan; Muhidin; Iwan Sumirat
JUTEKS Vol 8 No 1 (2021): JuTEkS (Jurnal Teknik Elektro dan Sains)
Publisher : Program Studi Teknik Elektro Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/juteks.v8i1.15885

Abstract

Post Weld Heat Treatment (PWHT) sebagai proses pemanasan untuk menghilangkan tegangan sisa pasca pengelasan suatu material perlu dilakukan inovasi sistem kontrol temperatur berbasis PLC. Pembuatan prototype mesin PWHT berbasis PLC Mitsubishi FX2N 48 MT dengan Modul Analog FX2N 4AD TC agar memudahkan sistem kontrol PWHT menjadi lebih efisien dengan hanya membuat satu program untuk mengaktivasi beberapa channel heater. PWHT berbasis PLC Mitsubishi FX2N 48 MT dengan Modul Analog FX2N 4AD TC dapat membaca perubahan temperature pada kondisi heating rate, holding time dan cooling rate. Hasilnya pada kondisi heating rate maka alat akan bekerja selama 180 detik kemudian heater OFF setelah mencapai suhu 150°C dan ON kembali jika suhu dibawah 150°C selanjutnya pada proses holding time dilakukan penahan suhu puncak disuhu maksimal 200°C heater akan OFF dan disuhu minimal 150°C maka heater akan ON kembali selama 180 detik dan cooling rate adalah akhir proses penurunan suhu secara bertahap dengan penurunan suhu di antara 150°C heater akan ON dan OFF selama 180 detik. Ini menandakan alat sudah bekerja dengan baik.
Development of Standard Test Specimens for Competency Improvement of Non-destructive Test (NDT) Personnel—Industrial Radiography Sutanto, Jepri; Iswanto, Iswanto; Sumirat, Iwan; Pramutadi Andi Mustari, Asril; Permana, Sidik
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v9i2.26290

Abstract

Test specimens made of low-carbon SS400 steel in the form of plates and pipes will be manufactured for use by certification and training institutions. Currently, test specimens in Indonesia are imported, resulting in higher operational costs. Therefore, the domestic fabrication of test specimens is conducted to address this issue and improve the competency of NDT personnel. Radiographic techniques are applied to evaluate defects and verify acceptance criteria. Plate specimens with a geometry of 350 mm x 200 mm and pipes with a diameter of 2 "(50.8 mm) were welded using SMAW (Shielded Metal Arc Welding). Radiographic examinations revealed porosity and incomplete penetration (IP) defects on the plate specimens and four types of weld discontinuities on the pipe specimens: porosity, IP, external undercut, and spatter. The resulting density follows the acceptance standard, namely 2.12 on the plates and 1.91 on the pipes. Future evaluation using digital radiography methods such as computed radiography (CR) and digital detector arrays (DDA) is required to align with current technological advancements.
Co-Authors ., Ahyarudin ., Muhidin ., Romanto Abda Abda Adi Mardiansah Alfianto, Zulfahmi Asnan Ashari Dase, Revan Septian Dody Gunawan Sinaga Fithri Muliawati Fithri Mulyawati Hariansyah, Muhammad Ilham Rizq Fauzaan Iswanto Iswanto Joki Irawan M. Taufiq Fathaddin, M. Taufiq Muhamad ilham Muhammad Hariansyah Muhidin . Muhidin Muhidin Mulyawati, Fithri Nurjayanto, Ramdhan Opa Mustopa Pradhana, Renato Aditya Patria Pramutadi Andi Mustari, Asril Rakhmanto, Pri Agung Revan Septian Dase Rini Setiati Romanto . Ronny Tugonggo Sidik, Adi Permana Supriyanto . Supriyanto . Suryo Prakoso, Suryo Sutanto, Jepri Tika Hafzara Siregar Tugonggo, Ronny Zulfahmi Alfianto