{"id":2253,"date":"2021-08-11T05:57:12","date_gmt":"2021-08-11T05:57:12","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2253"},"modified":"2024-08-07T02:11:10","modified_gmt":"2024-08-07T02:11:10","slug":"stainless-steel-pipe-grades-for-oil-and-gas-field","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/id\/stainless-steel-pipe-grades-for-oil-and-gas-field\/","title":{"rendered":"Grade pipa baja stainless untuk bidang minyak dan gas"},"content":{"rendered":"<p>Secara umum, beberapa baja paduan rendah dapat memenuhi persyaratan lingkungan minyak dan gas yang korosif yang mengandung H2S, tetapi untuk lingkungan korosif yang mengandung CO2 atau H2S, CO2, dan Cl \u2013 seperti yang dibutuhkan oleh baja stainless Martensitic, baja stainless dupleks, atau bahkan paduan berbasis nikel. Versi API 5CT tahun 1988 menambahkan kelas baja tubing tahan korosi, serta menetapkan kelas C75 dengan kelas stainless Martensitic 9Cr dan 13Cr.<\/p>\n<p>&nbsp;<\/p>\n<h3><strong>Kekuatan tinggi <\/strong><strong>M<\/strong><strong>pipa stainless steel artensitic untuk sumur minyak <\/strong><\/h3>\n<p><strong>\u00a0<\/strong>Dalam lingkungan basah dengan CO2 sebagai gas utama, sering terjadi kerusakan korosi lokal pada pipa sumur minyak, seperti korosi pitting dan korosi intergranular, dll. Jika Cl \u2013 ada, kerusakan lokal akan semakin parah. Secara umum, dianggap bahwa korosi dapat diabaikan jika tekanan karbon dioksida lebih rendah dari 0,021MPa, dan korosi akan terjadi ketika tekanan karbon dioksida mencapai 0,021MPa. Ketika pCO2 lebih tinggi dari 0,021MPa, langkah-langkah anti-korosi yang tepat harus diambil. Secara umum, tidak ada kerusakan yang disebabkan oleh korosi pitting bila fraksi CO2 lebih rendah dari 0,05Mpa.<\/p>\n<p>Telah terbukti bahwa efek penggunaan agen pelepasan yang berlangsung lama untuk mencegah korosi CO2 terbatas, dan efek penggunaan baja kromium tinggi seperti baja 9%-%Cr lebih baik. Sejak tahun 1970-an, beberapa sumur gas alam telah menggunakan tabung baja stainless steel 9Cr dan 13Cr% untuk mencegah korosi CO2. American Petroleum Institute (API) merekomendasikan tabung baja stainless steel martensitic 9Cr dan 13Cr (API L80-9Cr dan L80-13Cr) untuk penggunaan yang terstandarisasi. Baja 13Cr memiliki resistensi yang lebih baik terhadap korosi CO2, sedangkan baja 9Cr-1Mo memiliki resistensi yang lebih baik terhadap korosi stres H2S. Secara prinsipnya, kedua baja tersebut tidak cocok jika H2S hadir dalam atmosfer CO2. Ketika H2S ada dalam sumur minyak CO2, resistensi SSCC pada pipa sumur minyak harus ditingkatkan sebisa mungkin, dan perawatan panas quenching and tempering harus diterapkan untuk mendapatkan martensite yang seragam dan kekerasan harus dikontrol sedini mungkin di bawah HRC22.<\/p>\n<p><strong><em>Kelas stainless steel dari sumur minyak<\/em><\/strong><\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"142\">Nilai<\/td>\n<td width=\"142\">C<\/td>\n<td width=\"142\">Mo<\/td>\n<td width=\"142\">Cr<\/td>\n<td width=\"142\">Ni<\/td>\n<td width=\"142\">Cu<\/td>\n<\/tr>\n<tr>\n<td width=\"142\">9Cr<\/td>\n<td width=\"142\">\u22640.15<\/td>\n<td width=\"142\">0.9-1.1<\/td>\n<td width=\"142\">8.0-10.0<\/td>\n<td width=\"142\">\u22640.5<\/td>\n<td width=\"142\">\/<\/td>\n<\/tr>\n<tr>\n<td width=\"142\">13Cr<\/td>\n<td width=\"142\">0.15-0.22<\/td>\n<td width=\"142\">\/<\/td>\n<td width=\"142\">12.0-14.0<\/td>\n<td width=\"142\">\u22640.5<\/td>\n<td width=\"142\">\/<\/td>\n<\/tr>\n<tr>\n<td width=\"142\">SUP9Cr<\/td>\n<td width=\"142\">\u22640.03<\/td>\n<td width=\"142\">1.5-2.5<\/td>\n<td width=\"142\">12.0-13.5<\/td>\n<td width=\"142\">4.0-6.0<\/td>\n<td width=\"142\">\/<\/td>\n<\/tr>\n<tr>\n<td width=\"142\">SUP13Cr<\/td>\n<td width=\"142\">\u22640.03<\/td>\n<td width=\"142\">1.5-2.5<\/td>\n<td width=\"142\">14.0-16.0<\/td>\n<td width=\"142\">5.0-7.0<\/td>\n<td width=\"142\">0.5-1.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Namun, tabung baja API 13Cr memiliki resistensi terhadap CO2 yang berkurang secara signifikan dan masa pakai yang lebih pendek ketika suhu sumur minyak mencapai 150\u00b0C atau lebih tinggi. Untuk meningkatkan resistensi terhadap korosi tabung baja API 13Cr terhadap CO2 dan SSC (kerusakan stres sulfida), tabung baja SUP13Cr dengan kandungan karbon rendah yang ditambahkan Ni dan Mo telah dikembangkan. Tabung baja ini dapat digunakan dalam lingkungan basah dengan suhu tinggi, konsentrasi CO2 yang tinggi, dan jumlah hidrogen sulfida yang kecil. Struktur tabung ini berupa martensite dengan kandungan karbon rendah dan kurang dari 5% ferrite. Resistensi korosi terhadap CO2 dapat ditingkatkan dengan mengurangi kandungan karbon atau menambahkan Cr dan Ni, dan resistensi korosi terhadap pitting dapat ditingkatkan dengan menambahkan Mo. Dibandingkan dengan tabung baja API 13Cr, resistensi korosi terhadap CO2 dan SSC sangat meningkat. Sebagai contoh, dalam lingkungan korosif yang sama, tingkat korosi pipa baja API 13Cr lebih dari 1mm\/tahun, sedangkan tingkat korosi pipa baja SUP13Cr berkurang menjadi 0,125mm\/tahun. Dengan perkembangan sumur dalam dan ultra-dalam, suhu sumur minyak terus meningkat. Jika suhu sumur minyak semakin meningkat hingga lebih dari 180\u2103, ketahanan korosi pipa sumur minyak SUP13Cr juga mulai menurun, yang tidak dapat memenuhi persyaratan penggunaan jangka panjang. Menurut prinsip pemilihan material tradisional, harus dipilih baja stainless duplex atau paduan nikel-base.<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<h3><strong>M<\/strong><strong>stainless steel artensitic<\/strong><strong>\u00a0pipa untuk jalur pipa minyak<\/strong><\/h3>\n<p>The <a href=\"https:\/\/energy-steel.com\/products\/steel-pipes\/line-pipe\/\">pipa saluran<\/a> Penerangan minyak dan gas yang korosif memerlukan bahan tahan korosi yang sama dengan pipa sumur minyak. Sebelumnya, pipa biasanya disuntikkan dengan zat pelepasan yang stabil atau bahan tahan korosi seperti baja stainless dua fase. Yang pertama tidak stabil dalam efek anti-korosi pada suhu tinggi dan dapat menyebabkan polusi lingkungan. Meskipun baja stainless dua fase memiliki ketahanan korosi yang baik, biayanya tinggi, dan input panas pengelasan sulit dikontrol, pengelasan pra-pemanasan dan perawatan panas pasca-pengelasan pada konstruksi lokasi menimbulkan kesulitan. Pipa martensitik 11Cr untuk lingkungan CO2 dan pipa martensitik 12Cr untuk lingkungan CO2+ dengan kandungan H2S yang rendah dimasukkan ke dalam penggunaan. Kolom ini memiliki ketangguhan las yang baik; tanpa pengelasan pra-pemanasan dan perawatan panas pasca-pengelasan, sifat mekanisnya dapat setara dengan kelas baja X80, dan ketahanannya terhadap korosi lebih baik daripada pipa dengan zat pelepasan yang tertunda atau pipa stainless dua fase.<\/p>\n<p><em><strong>Pipa baja stainless untuk saluran paip<\/strong><\/em><\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"170\">Nilai<\/td>\n<td width=\"170\">C<\/td>\n<td width=\"170\">Cr<\/td>\n<td width=\"170\">Ni<\/td>\n<td width=\"170\">Mo<\/td>\n<\/tr>\n<tr>\n<td width=\"170\">11Cr<\/td>\n<td width=\"170\">\u22640.03<\/td>\n<td width=\"170\">11<\/td>\n<td width=\"170\">1.5<\/td>\n<td width=\"170\">\/<\/td>\n<\/tr>\n<tr>\n<td width=\"170\">12Cr<\/td>\n<td width=\"170\">\u22640.03<\/td>\n<td width=\"170\">12<\/td>\n<td width=\"170\">5.0<\/td>\n<td width=\"170\">2.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u00a0<\/strong><\/p>\n<h3>Pipa stainless steel dupleks untuk industri minyak bumi<\/h3>\n<p>Bahan stainless steel martensitic SUP 15Cr tidak dapat memenuhi persyaratan ketahanan korosi bila suhu minyak (gas) sumur yang mengandung CO2 melebihi 200\u2103, dan diperlukan bahan stainless steel dupleks dengan ketahanan yang baik terhadap CO2 dan Cl \u2014 keretakan korosi stres. Saat ini, <a href=\"https:\/\/wldstainless.com\/materials\/duplex-stainless-steel\/alloy-2205-stainless-steel\/\">22Cr<\/a> dan baja stainless duplex 25Cr (Austenitic dan Ferrite) cocok untuk sumur CO2 di atas 200\u2103, sedangkan pabrikan menyesuaikan kandungan Cr dan Ni untuk menyesuaikan ketahanan korosi. Baja duplex terdiri dari faset Austenitic plus faset Ferrite. Selain Cr dan Ni, Mo dan N dapat ditambahkan untuk meningkatkan ketahanan korosi. Selain itu, baja stainless duplex memiliki ketahanan korosi pada suhu tinggi yang baik, dibandingkan dengan baja stainless martensite, ia memiliki ketahanan korosi stres H2S yang lebih baik, pada suhu kamar dalam uji NACE TM 0177-A, dalam larutan, beban 85%SMYS, dalam kondisi tekanan H2S, baja stainless martensite hanya dapat melewati uji tekanan H2S parsial 10kPa. Baja stainless duplex 25Cr dapat melewati uji tekanan H2S parsial 100kPa.<\/p>\n<p>&nbsp;<\/p>\n<p>Secara umum, dalam kondisi adanya CO2 dan H2S, atau tekanan H2S tidak mencapai titik kritis tetapi Cl- sangat tinggi, baja 13Cr (termasuk baja super 13Cr) tidak dapat memenuhi persyaratan tersebut. <a href=\"https:\/\/wldstainless.com\/materials\/duplex-stainless-steel\/alloy-2205-stainless-steel\/\">22Cr<\/a> duplex stainless steel (ASF 2205) atau super duplex stainless steel 25Cr, bahkan stainless steel dengan kadar Ni yang tinggi, Cr, dan paduan berbasis Ni serta Fe-Ni seperti G3, alloy 825 yang mengandung lebih dari 20% Cr, Ni30% diperlukan.<\/p>","protected":false},"excerpt":{"rendered":"<p>Generally speaking, some low alloy steels can meet the requirements for corrosive oil and gas environment containing H2S, but the corrosive environment containing CO2 or H2S, CO2, Cl &#8211; coexistence where the Martensitic stainless steel need, duplex stainless steel or even nickel-based alloy. The 1988 version of API 5CT added corrosion-resistant tubing steel grades, specified [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2227,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2253","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"he American Petroleum Institute (API) recommends 9Cr and 13Cr martensitic stainless steel tubes (API L80-9Cr and L80-13Cr) for standardized use. 13Cr steel has better resistance to CO2 corrosion, while 9Cr-1Mo steel has better resistance to H2S stress corrosion cracking.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"WLD Stainless\"\/>\n\t<link rel=\"canonical\" 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