{"id":55778,"date":"2025-12-22T07:48:38","date_gmt":"2025-12-22T07:48:38","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=55778"},"modified":"2026-03-30T07:19:49","modified_gmt":"2026-03-30T07:19:49","slug":"o-que-e-nace-mr0175-iso-15156","status":"publish","type":"post","link":"https:\/\/www.kaysuns.com\/pt\/what-is-nace-mr0175-iso-15156\/","title":{"rendered":"O que \u00e9 a norma NACE MR0175 \/ ISO 15156?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"55778\" class=\"elementor elementor-55778\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5babc4c e-flex e-con-boxed e-con e-parent\" data-id=\"5babc4c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-eeaed2b elementor-widget elementor-widget-text-editor\" data-id=\"eeaed2b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>NACE MR0175 \/ ISO 15156<\/strong> is the international standard that governs material selection for oil and gas production in sour environments.Specifically,it provides essential requirements for metals exposed to hydrogen sulfide (H<sub>2<\/sub>S).For engineers managing high-integrity <a href=\"https:\/\/www.kaysuns.com\/stainless-steel-pipes\/\" target=\"_blank\" rel=\"noopener\">stainless steel pipe<\/a> systems,this standard is a critical safety roadmap.It ensures that materials can withstand aggressive chemical attacks without sudden,catastrophic failure.By following these rules,industries protect both their personnel and the surrounding environment.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-42b8046 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"42b8046\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f44dd02\" data-id=\"f44dd02\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a8953e3 elementor-widget elementor-widget-heading\" data-id=\"a8953e3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The Core of NACE MR0175 \/ ISO 15156<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fc78f14 elementor-widget elementor-widget-text-editor\" data-id=\"fc78f14\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tThe standard focuses on preventing material failure in &#8220;sour&#8221; environments.A sour environment contains water and H<sub>2<\/sub>S at specific <a href=\"https:\/\/www.kaysuns.com\/blog\/ss-flange-pressure-rating-conversion\/\" target=\"_blank\" rel=\"noopener\">pressure levels<\/a>.Under these conditions,standard metals often become brittle and crack.Consequently,the industry created NACE MR0175 to define which alloys are safe for use.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-807ae47 elementor-widget elementor-widget-text-editor\" data-id=\"807ae47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In 2003,NACE joined with ISO to create a unified global standard.Today,ISO 15156 consists of three parts:<\/p><ol><li>General principles for material selection.<\/li><li>Requirements for cracking-resistant carbon and low-alloy steels.<\/li><li>Requirements for cracking-resistant corrosion resistant alloys (CRAs),including various stainless steel grades.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-82b69ac elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"82b69ac\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-8ff61d6\" data-id=\"8ff61d6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-40dbd29 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"40dbd29\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What We Do<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e455945 elementor-drop-cap-yes elementor-widget__width-initial elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"e455945\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;drop_cap&quot;:&quot;yes&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Plate<\/li><li>Sheet<\/li><li>Forgings<\/li><li>Round Bar<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0961a55 elementor-drop-cap-yes elementor-widget__width-initial elementor-drop-cap-view-default elementor-widget elementor-widget-text-editor\" data-id=\"0961a55\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;drop_cap&quot;:&quot;yes&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Flange<\/li><li>Pipes<\/li><li>Fittings<\/li><li>Customized<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-3f565ba\" data-id=\"3f565ba\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f2a9b98 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"f2a9b98\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Contact Us For More Information\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d9ff082 elementor-align-center elementor-mobile-align-center elementor-widget__width-initial elementor-widget elementor-widget-button\" data-id=\"d9ff082\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjQ2ODEzIiwidG9nZ2xlIjpmYWxzZX0%3D\" target=\"_blank\" id=\"#241018\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contact Us<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7987c2d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7987c2d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2fe65ab\" data-id=\"2fe65ab\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1deb389 elementor-widget elementor-widget-heading\" data-id=\"1deb389\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The Relationship Between NACE MR0175 and Stainless Steel<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b75a9f0 elementor-widget elementor-widget-text-editor\" data-id=\"b75a9f0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Stainless steel is a primary material choice for modern piping infrastructure.However,not all stainless steel is suitable for sour service.The relationship between NACE MR0175 and stainless steel is defined by chemical limits and mechanical processing.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c88ef4c elementor-widget elementor-widget-text-editor\" data-id=\"c88ef4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>For instance,the standard places strict limits on the hardness of <a href=\"https:\/\/www.kaysuns.com\/stainless-steel-pipe-fittings\/\" target=\"_blank\" rel=\"noopener\">stainless steel pipe fittings<\/a> and flanges.High hardness often correlates with high strength,but it also increases the risk of cracking.Therefore,the standard often mandates specific heat treatments,such as solution annealing.These processes ensure that the metal maintains a uniform microstructure.This uniformity is vital for resisting the harsh conditions found in deep-sea wells or chemical refineries.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-58e2279 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"58e2279\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0d8fa89\" data-id=\"0d8fa89\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0ca7a8b elementor-widget elementor-widget-heading\" data-id=\"0ca7a8b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">NACE MR0175 and Sulfide Stress Cracking<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5af458b elementor-widget elementor-widget-text-editor\" data-id=\"5af458b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The most dangerous threat in a sour environment is sulfide stress cracking (SSC).It is a form of hydrogen embrittlement that occurs when tensile stress meets H<sub>2<\/sub>S\u00a0and water.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a96d4bf elementor-widget elementor-widget-text-editor\" data-id=\"a96d4bf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>How does it work?When H<sub>2<\/sub>S reacts with the steel surface,it releases atomic hydrogen.These tiny atoms penetrate the metal lattice of the stainless steel pipe.Once inside,they collect at grain boundaries and create internal pressure.If the material is too hard or under too much stress,it will snap.NACE MR0175 acts as a shield against this.It specifies the maximum allowable hardness and environmental limits (temperature, pH and chloride levels) to prevent SSC from ever starting.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ccec98a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ccec98a\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-05dca1f\" data-id=\"05dca1f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5c55e92 elementor-widget elementor-widget-heading\" data-id=\"5c55e92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Material Environmental Limits for Stainless Steels<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-13bed09 elementor-widget elementor-widget-text-editor\" data-id=\"13bed09\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tThe table summarizes the typical environmental limits for common stainless steel categories under NACE MR0175.<br \/>Note: These limits vary based on the specific pH and application.Always consult the latest edition of the standard for precise engineering.\n\n&nbsp;\n<table>\n<tbody>\n<tr bgcolor=\"#00a0e9\">\n<th>Material Category<\/th>\n<th>Typical Grade<\/th>\n<th>Max Temp<\/th>\n<th>Max H<sub>2<\/sub>S Partial Pressure (psia)<\/th>\n<th>Max Chlorides (mg\/L)<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Austenitic<\/td>\n<td>316L<\/td>\n<td>60\u2103 | 140\u2109<\/td>\n<td>15<\/td>\n<td>1000<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Duplex<\/td>\n<td>2205<\/td>\n<td>232\u2103 | 449.6\u2109<\/td>\n<td>0.3<\/td>\n<td>160,000<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Super Duplex<\/td>\n<td>2507<\/td>\n<td>232\u2103 | 449.6\u2109<\/td>\n<td>3.0<\/td>\n<td>160,000<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Nickel Alloy<\/td>\n<td>Inconel 625<\/td>\n<td>No Limit<\/td>\n<td>No Limit<\/td>\n<td>No Limit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-16d5268 e-flex e-con-boxed e-con e-parent\" data-id=\"16d5268\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-70ba9ba elementor-cta--layout-image-right elementor-cta--mobile-layout-image-above elementor-cta--skin-classic elementor-animated-content elementor-widget elementor-widget-call-to-action\" data-id=\"70ba9ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<a class=\"elementor-cta\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjQ2ODEzIiwidG9nZ2xlIjpmYWxzZX0%3D\" target=\"_blank\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.kaysuns.com\/wp-content\/uploads\/2025\/12\/What-is-NACE-MR0175-CTA.webp);\" role=\"img\" aria-label=\"What is NACE MR0175 - CTA\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<h2 class=\"elementor-cta__title elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tFeel Free To Contact Us\t\t\t\t\t<\/h2>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tKAYSUNS offers package solutions for piping materials such as Pipes, Fittings, Flanges, Valves, Plates, Forgings, Ingots of Stainless Steel, Duplex and Alloy Steels, all kinds of Fasteners (Bolts, Nuts, Flat Washers, Bullet Washers) and other products. We accept customized service for our products and some of them can be supplied in small quantities. If you have any questions about our company and products, please feel free to contact us.\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__button-wrapper elementor-cta__content-item elementor-content-item \">\n\t\t\t\t\t<span class=\"elementor-cta__button elementor-button elementor-size-\">\n\t\t\t\t\t\tGet QUOTE\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7b1deaf elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7b1deaf\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-26be2c4\" data-id=\"26be2c4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a7e501c elementor-widget elementor-widget-heading\" data-id=\"a7e501c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why Compliance Matters for Piping Systems<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5b07539 elementor-widget elementor-widget-text-editor\" data-id=\"5b07539\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In a piping system,the weakest link determines the safety of the entire line.If a single flange or valve fails due to SCC,the results can be deadly.Therefore,every component must be certified.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-749f9b1 elementor-widget elementor-widget-text-editor\" data-id=\"749f9b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol><li data-path-to-node=\"22,0,0\"><b data-path-to-node=\"22,0,0\" data-index-in-node=\"0\">Material Traceability:<br \/><\/b>Every pipe and fitting must have a mill test certificate (MTC).This document proves the chemistry and hardness meet NACE MR0175 requirements.<\/li><li data-path-to-node=\"22,1,0\"><b data-path-to-node=\"22,1,0\" data-index-in-node=\"0\">Fabrication Control:<br \/><\/b>Welding can increase the hardness of the heat affected zone (HAZ).Compliance requires proper welding procedures to keep the HAZ within safe limits.<\/li><li data-path-to-node=\"22,2,0\"><b data-path-to-node=\"22,2,0\" data-index-in-node=\"0\">Long-Term Reliability:<br \/><\/b>Using NACE-compliant materials reduces the need for expensive corrosion inhibitors.This leads to a lower lifecycle cost for the asset.<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5101d73 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5101d73\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2a37b24\" data-id=\"2a37b24\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4abd126 elementor-widget elementor-widget-heading\" data-id=\"4abd126\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Common Hardness Requirements in NACE MR0175<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-240f968 elementor-widget elementor-widget-text-editor\" data-id=\"240f968\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tHardness control is the most practical way to ensure a component is safe for sour service.Below are the typical hardness limits for various piping components.\n<table>\n<tbody>\n<tr bgcolor=\"#00a0e9\">\n<th>Component Type<\/th>\n<th>Material Grade<\/th>\n<th>Hardness Limit (HRC)<\/th>\n<th>Standard Requirement<\/th>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Stainless Steel Pipe<\/td>\n<td>316\/316L<\/td>\n<td>\u2264 22 HRC<\/td>\n<td>Solution Annealed<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Pipe Fittings<\/td>\n<td>Duplex 2205<\/td>\n<td>\u2264 28 HRC<\/td>\n<td>Phase balance 40-60%<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Flanges &#038; Valves<\/td>\n<td>Martensitic 410<\/td>\n<td>\u2264 22 HRC<\/td>\n<td>Double Tempering required<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#05B8E4\">Bolting\/Fasteners<\/td>\n<td>B7M \/ L7M<\/td>\n<td>\u2264 22 HRC<\/td>\n<td>Controlled Stress levels<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-42b3e99 e-flex e-con-boxed e-con e-parent\" data-id=\"42b3e99\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div 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Garantindo a seguran\u00e7a do pessoal e protegendo o meio ambiente.<\/p>","protected":false},"author":1,"featured_media":55839,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_ti_tpc_template_sync":false,"_ti_tpc_template_id":"","footnotes":""},"categories":[316,186],"tags":[],"class_list":["post-55778","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is NACE MR0175 \/ ISO 15156 ? | Kaysuns<\/title>\n<meta name=\"description\" content=\"NACE MR0175 sets core standards for metals exposed to sulfide environments. 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