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NACE/AMPP recommended practices like RP0472 are copyrighted and distributed by AMPP; obtain the official PDF through AMPP’s publications store or authorized distributors to ensure you have the current and complete text, including figures, tables, equations, and legal usage rights.
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NACE RP0472 is a recommended practice published by the National Association of Corrosion Engineers (NACE) that focuses on "Design, Fabrication, and Surface Finish Practices for Stainless Steel Equipment in Refining, Petrochemical, and Associated Processing Industries."
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If you have access to the PDF of NACE RP0472, ensure it's the latest version, as updating to the newest guidelines can be crucial for maintaining safety and efficiency in industrial operations.
The Updated NACE RP0472 PDF: A Comprehensive Guide to Pipeline Integrity Management
The National Association of Corrosion Engineers (NACE) has recently released a new version of its widely adopted standard, NACE RP0472 PDF. This updated document provides guidelines for pipeline integrity management, focusing on the assessment, mitigation, and prevention of corrosion threats to pipelines. As the pipeline industry continues to evolve, the NACE RP0472 PDF new version offers critical recommendations for ensuring the safe and reliable operation of pipelines.
Introduction to NACE RP0472
First published in 1999, NACE RP0472 has become a cornerstone document for pipeline operators, regulators, and integrity management professionals. The standard provides a framework for managing pipeline integrity, with a primary focus on mitigating corrosion threats. Over the years, the document has undergone several revisions to reflect advances in technology, changes in industry practices, and lessons learned from pipeline incidents.
What's New in the NACE RP0472 PDF New Version?
The updated NACE RP0472 PDF new version includes several significant changes and additions, reflecting the latest research, technologies, and industry best practices. Some of the key updates include:
Key Components of the NACE RP0472 PDF New Version
The updated NACE RP0472 PDF new version is organized around several key components, including:
Benefits of the NACE RP0472 PDF New Version
The updated NACE RP0472 PDF new version offers several benefits to pipeline operators, regulators, and integrity management professionals, including:
Conclusion
The updated NACE RP0472 PDF new version is a critical document for pipeline operators, regulators, and integrity management professionals. The standard provides a comprehensive framework for managing pipeline integrity, with a focus on mitigating corrosion threats and ensuring safe and reliable pipeline operation. By adopting the guidelines and recommendations outlined in the NACE RP0472 PDF new version, pipeline operators can improve pipeline safety, efficiency, and compliance, while increasing confidence among stakeholders.
The primary guide for NACE RP0472 (now designated as NACE SP0472 ) is the standard titled
"Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments"
. This standard provides the critical technical framework for controlling weld hardness in P-No. 1 carbon steels to prevent Hydrogen Stress Cracking (HSC) and Sulfide Stress Cracking (SSC) in downstream refinery operations.
AMPP - The Association for Materials Protection and Performance Key Technical Guidelines The latest active version is NACE SP0472-2020 . Essential requirements include:
AMPP - The Association for Materials Protection and Performance Hardness Limits : Establishes a maximum hardness of 200 Brinell (HBW)
for weld deposits to compensate for portable testing variations, which is more stringent than the 22 HRC limit often cited in upstream standards like MR0175. Heat-Affected Zone (HAZ)
: Requires the HAZ of pressure boundary, internal attachment, and repair welds to comply with a maximum hardness of Postweld Heat Treatment (PWHT)
: Provides specific guidance in Appendix D on the correct application of PWHT, including heating/cooling rates and measurement positions, to ensure residual stresses are properly relieved. Process Coverage
: Applicable to various welding processes, including SMAW, GMAW (including FCAW), GTAW, and SAW.
AMPP - The Association for Materials Protection and Performance Essential Resources & Previews Official NACE SP0472-2020 Document
: Access the full technical standard for detailed compliance requirements. ANSI Webstore Preview
: A free preview of the 2020 edition covering the scope and general requirements. AMPP (NACE) Product Page
: The official source for purchasing the most recent, validated version of the standard. Scribd Technical Overview
: A presentation-style guide summarizing how SP0472 fits alongside other standards like MR0103 for refinery sour service.
AMPP - The Association for Materials Protection and Performance Standard Progression
It is important to note the evolution of this document to ensure you are using the correct version: NACE RP0472-2005 : Previous "Recommended Practice" version. NACE SP0472-2015 : Updated to "Standard Practice". NACE SP0472-2020 : The current active and reaffirmed ANSI Webstore PWHT parameters for a particular welding process?
NACE RP0472 (now ANSI/AMPP SP0472) is the primary industry standard for preventing environmental cracking in carbon steel weldments within corrosive petroleum refining environments. Overview of the Standard The standard, titled
"Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Refining Environments,"
establishes the minimum requirements for welding procedures, hardness testing, and post-weld heat treatment (PWHT). Its goal is to ensure that weldments are resistant to common refining industry issues like Stress Corrosion Cracking (SCC) Hydrogen-Induced Cracking (HIC) 1. Scope and Application Target Materials: Specifically covers P-No. 1 carbon steels (the most common structural and pressure vessel steels). Environment:
Focuses on refining processes involving corrosive agents such as hydrogen sulfide ( cap H sub 2 cap S ), hydrofluoric acid ( cap H cap F ), and amines. Weld Zones:
Addresses the weld metal, the Heat-Affected Zone (HAZ), and the adjacent base metal. 2. Key Prevention Strategies
The standard outlines three critical control methods to maintain the integrity of the steel: Hardness Control:
High hardness is a primary indicator of susceptibility to cracking. The standard typically mandates a maximum hardness of 200 Brinell (HBW) for the weld deposit. Post-Weld Heat Treatment (PWHT):
PWHT is often required to reduce residual stresses from welding and to temper the microstructure, thereby lowering the hardness of the HAZ. Welding Procedure Qualification:
Procedures must be tested and qualified to ensure they consistently produce welds that meet the hardness and ductility requirements. 3. Hardness Testing Requirements
To verify compliance, the standard specifies rigorous testing protocols: Frequency: nace rp0472 pdf new
Regular testing intervals on production welds (e.g., one test per every 15 meters of weld).
Testing must be performed on the process-side (the side exposed to the corrosive medium) whenever possible. Methodology:
Guidance is provided on using portable hardness testers and converting values (e.g., Rockwell C to Brinell) accurately. 4. Transition to AMPP
Users looking for the "new" PDF should note that NACE International merged with SSPC to form
AMPP (The Association for Materials Protection and Performance) . Consequently, the document is now designated as ANSI/AMPP SP0472
The most current version of this standard is NACE SP0472-2020 (Active: Reaffirmed)
. Originally known as RP0472, the "RP" (Recommended Practice) prefix was updated to "SP" (Standard Practice) in later revisions to align with NACE nomenclature. Core Objective This standard establishes guidelines for
methods and controls to prevent in-service environmental cracking
of carbon steel (P-No. 1) weldments used in corrosive petroleum refining environments. It specifically addresses: Google Groups Hydrogen-induced cracking (e.g., SSC, HSC, SOHIC). Stress corrosion cracking (SCC)
from residual stresses (e.g., Alkaline SCC, Caustic, Amine, and Carbonate cracking). Key Technical Requirements
Review: NACE RP0472 PDF - A Comprehensive Guide for Corrosion Prevention
Introduction
The NACE RP0472 PDF, titled "Recommended Practice for Corrosion Prevention in the Oil and Gas Industry," is a widely recognized standard in the corrosion prevention industry. As a crucial document for professionals in the oil and gas sector, I have reviewed the latest edition of this publication to provide an overview of its contents and usefulness.
Overview
The NACE RP0472 PDF provides detailed guidelines and best practices for preventing corrosion in the oil and gas industry. The document covers various aspects of corrosion prevention, including materials selection, design, fabrication, installation, and maintenance of equipment and facilities. The recommendations are based on current industry knowledge and research, ensuring that readers have access to the most up-to-date information.
Content and Structure
The NACE RP0472 PDF is structured into several sections, each addressing a specific aspect of corrosion prevention:
Key Takeaways
The NACE RP0472 PDF provides valuable insights and practical recommendations for:
Conclusion
The NACE RP0472 PDF is an essential resource for anyone involved in the oil and gas industry, particularly those responsible for corrosion prevention, materials selection, and equipment design. The document's comprehensive coverage of corrosion prevention best practices makes it a valuable reference for both experienced professionals and those new to the field.
Rating: 5/5
The NACE RP0472 PDF is a well-structured and informative document that provides practical guidance on corrosion prevention in the oil and gas industry. I highly recommend it to anyone seeking to improve their understanding of corrosion prevention and enhance their professional practice.
Based on your request for the NACE RP0472 document, here are the details regarding the status of this standard and how to access it.
The document NACE RP0472 is an old standard that has been withdrawn and replaced. It is no longer considered "new," and you should not use it for current specifications or regulatory compliance.
A: Yes, but it refers to NACE SP0176 (Corrosion Control of Offshore Steel Structures) for supplemental requirements.
Because this is a copyrighted industry standard, you cannot legally download a "new" or free PDF version from unauthorized sources. You must obtain it through the official publisher.
Summary: If you are looking for the latest requirements to prevent environmental cracking in carbon steel weldments, do not use NACE RP0472. You must use AMPP SP0472-2023.
For industry professionals in petroleum refining, staying current with the latest standards for material integrity is critical. While many still search for NACE RP0472, it is important to note that this standard has been redesignated and updated to NACE SP0472. The current active version is NACE SP0472-2020, "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments". Overview of NACE SP0472 (Formerly RP0472)
NACE SP0472 establishes guidelines to prevent most forms of environmental cracking in carbon steel weldments. It specifically focuses on P-No. 1 steels (Group 1 or 2) used in refinery equipment such as: Pressure vessels Heat exchangers Piping systems Valve bodies Pump and compressor cases
The standard covers both new fabrication and repair welds, addressing various cracking mechanisms including Hydrogen Stress Cracking (HSC) and Alkaline Stress Corrosion Cracking (ASCC). Key Technical Requirements
The primary goal of the standard is to ensure weldments are resistant to corrosive refinery environments through specific controls: NACE SP0472-2020 - Accuris Standards Store
The standard formerly known as NACE RP0472 has been updated and redesignated as NACE SP0472. The current active version is NACE SP0472-2020, which was reaffirmed in August 2020. Overview of NACE SP0472
This standard provides critical guidelines for the petroleum refining industry to prevent in-service environmental cracking of carbon steel weldments. It is widely used by refiners, equipment manufacturers, and construction contractors to ensure the safe operation of pressure vessels, piping, and heat exchangers. Key Technical Aspects
The standard formerly known as NACE RP0472 is now officially NACE SP0472 . As of April 2026, the current active version is NACE SP0472-2020 (Reaffirmed) Current Standard Overview Official Name
: Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments. Active Edition NACE SP0472-2020 Organization : Maintained by
(the merged organization of NACE International and SSPC) under Task Group 326. Key Technical Scope
This standard provides requirements for mitigating environmental cracking in carbon steel weldments within refinery environments.
AMPP - The Association for Materials Protection and Performance Application
: Covers pressure vessels, heat exchangers, and piping components. Requirements
: Focuses on material hardness, welding procedures, and PWHT to prevent cracking. Hardness Limit
: Generally specifies a maximum weld deposit hardness of 200 HB.
Important Notice Regarding Document Status
Before providing the details of the report, it is crucial to clarify the status of this document. You're looking for information related to NACE RP0472,
The document previously known as NACE RP0472 has been withdrawn and superseded. It is no longer the current industry standard.
Because distributing a PDF of the standard directly would violate copyright laws (held by AMPP, the Association for Materials Protection and Performance), this report provides a comprehensive summary of the standard's contents, scope, and technical requirements. This summary applies to the current SP0472 standard, which retains the core technical data of the original RP0472.
A: Not legally, unless you are an AMPP member accessing the member portal. The standard is copyrighted intellectual property. Free versions online are either outdated or counterfeit.
Warning: Free PDFs from unknown websites often host the 2005 edition. Always verify the revision date on the title page.
The most recent version of this standard is NACE SP0472-2020
. It was reaffirmed in 2020 by the Association for Materials Protection and Performance (AMPP) and remains the active edition as of 2026.
AMPP - The Association for Materials Protection and Performance Note that the designation changed from (Recommended Practice) to
(Standard Practice) in 2010 to align with NACE nomenclature.
AMPP - The Association for Materials Protection and Performance Latest Edition Details
Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments Active Status : Reaffirmed on August 17, 2020.
: Covers guidelines for P-No. 1 carbon steel weldments to prevent hydrogen stress cracking (HSC), alkaline stress corrosion cracking (ASCC), and other forms of environmental cracking in refinery services. Hardness Limits : Generally limits weld metal hardness to (200 HBW) and heat-affected zone (HAZ) hardness to to prevent cracking. 分析测试百科网 Where to Access
You can find official copies or previews of the 2020 version through these platforms: AMPP Store : The official source for NACE SP0472-2020 ANSI Webstore : Provides a preview PDF showing the table of contents and foreword. Accuris (formerly IHS Markit) : Offers the current standard for purchase. Accuris Standards Store Do you need specific hardness requirements material exemptions for a particular project? NACE SP0472-2020 - Accuris Standards Store
Browse related products from National Association of Corrosion Engineers * National Association of Corrosion Engineers > Pipeline/ Accuris Standards Store NACE SP0472-2020.pdf
The document NACE SP0472 (formerly RP0472), titled "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments," is a critical standard used to prevent failures in petroleum refinery equipment and piping. Scope and Application
Primary Goal: Establish standard practices for producing weldments in P-No. 1 carbon steels that are resistant to environmental cracking (such as Sulfide Stress Cracking, or SSC) in corrosive refining environments.
Target Materials: Specifically covers carbon steels with a minimum specified tensile strength of 480 MPa (70,000 psi) or less.
Applicable Equipment: Used for pressure vessels (ASME Section VIII), process piping (ASME B31.3), and storage tanks (API 620/650).
Typical Environments: Predominantly used for services containing wet hydrogen sulfide (H₂S), often referred to as "sour service". Key Controls and Requirements
Hardness Limits: A major focus is controlling the hardness of the weld deposit and the Heat-Affected Zone (HAZ). High hardness (often resulting from welding processes like SAW with active fluxes) is a primary cause of environmental cracking.
The standard typically requires a maximum hardness of 248 HV10 for HAZs of pressure boundary and internal attachment welds.
Previous versions referenced a 200 HB (Brinell) limit to compensate for testing variations and non-homogeneity in weld deposits.
Welding Procedure Qualification: Verification often occurs during the qualification of welding procedures. Essential variables must be controlled to ensure production welds match the qualified test samples.
Postweld Heat Treatment (PWHT): While PWHT is a common method to reduce hardness and residual stress, SP0472 allows for other options like base material chemistry controls if PWHT is not feasible.
Thermal Cutting: Users are cautioned that thermal cutting processes also produce a HAZ that may require the removal of approximately 3mm of material to eliminate high-hardness zones. Historical Context
Origin: Originally prepared in 1972 to address a spike in SSC failures in the late 1960s.
Consensus Standard: It eventually replaced API RP 942, becoming the recognized industry consensus standard for these controls.
Naming Change: The "RP" (Recommended Practice) prefix was updated to "SP" (Standard Practice) in later editions (e.g., SP0472-2010, SP0472-2020). User Responsibilities preview_NACE+Standard+RP0472-2005.pdf - ANSI Webstore
“Get the official new NACE RP0472 PDF from AMPP – or contact us for a gap analysis between your current practices and the latest edition.”
The NACE standard formerly known as RP0472 has been updated and renamed to NACE SP0472, with the most current major revision being the 2020 edition. A standout "good feature" in recent updates is the introduction of mandatory hardness survey layouts for new welding procedure qualifications. Key Features of NACE SP0472
Renaming & Standardization: Originally RP0472 ("Recommended Practice"), it is now SP0472 ("Standard Practice") to align with modern NACE naming conventions.
Enhanced Hardness Controls: It provides specific requirements for temper bead welding to reduce Heat-Affected Zone (HAZ) hardness and mandates strict hardness testing positions for new qualifications.
Industry Consensus: This standard has effectively replaced API RP 942, serving as the primary industry consensus for preventing environmental cracking in petroleum refinery weldments.
Specific Hardness Limits: It maintains a maximum weld deposit hardness of 200 Brinell (HBW) for P-No. 1 steels, which is more stringent than the 22 HRC limit found in other standards like MR0175 to account for production testing variations.
Prevention of Environmental Cracking: It covers multiple cracking mechanisms including Hydrogen Stress Cracking (HSC), Sulfide Stress Cracking (SSC), and Alkaline Stress Corrosion Cracking (ASCC). Current Documentation
You can find the latest official version through the following platforms:
AMPP (NACE) Store: The official source for the SP0472-2020 PDF.
ANSI Webstore Preview: Provides a free look at the scope and foreword of the 2020 version. Nace RP0472 - 2005 | PDF - Scribd
What is NACE RP0472?
NACE RP0472, also known as "Recommended Practice for Inspecting Pipelines," is a standard published by the National Association of Corrosion Engineers (NACE International). The document provides guidelines for inspecting pipelines to ensure their integrity and reliability.
What does the standard cover?
The NACE RP0472 standard covers various aspects of pipeline inspection, including:
New updates in RP0472 (latest edition)
The latest edition of NACE RP0472 (2022) may include updates on:
Pros and cons
The NACE RP0472 standard provides valuable guidance for pipeline operators, inspectors, and integrity management professionals. Some benefits include:
However, some users might find:
Conclusion
The NACE RP0472 standard is a valuable resource for ensuring pipeline integrity and reliability. The latest edition (2022) likely includes updated guidance on risk-based inspection, non-destructive testing, and integrity management. By following this standard, pipeline operators and inspectors can improve safety, efficiency, and compliance with regulations.
The most recent version of this standard is NACE SP0472-2020, titled "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments". It was reaffirmed in 2020 and remains the active industry consensus for protecting P-No. 1 steel equipment. Key Updates and Core Requirements
Weld Deposit Hardness: Establishes a maximum criterion of 200 Brinell (HBW) for production weld deposits to prevent Hydrogen Stress Cracking (HSC) and Sulfide Stress Cracking (SSC).
HAZ Control: Since heat-affected zone (HAZ) hardness is difficult to measure in the field, the standard focuses on controlling it through base metal chemistry, post-weld heat treatment (PWHT), or specific welding procedure qualifications.
Mechanism Coverage: Addresses both cracking from hydrogen charging (SSC, SOHIC) and cracking from residual stresses, such as Alkaline Stress Corrosion Cracking (ASCC) like caustic or amine cracking.
Scope: Specifically covers P-No. 1, Group 1 or 2 steels with a minimum specified tensile strength of 70,000 psi (485 MPa) or less. Where to Find the Document
You can obtain the official, licensed PDF from authorized standards distributors:
AMPP Store: The primary source for the reaffirmed 2020 version.
ANSI Webstore: Provides the current standard and allows for a preview of the table of contents and foreword.
Accuris (formerly IHS Markit): Offers the document in various formats, including historical revisions for reference. NACE SP0472-2020 - Accuris Standards Store
Understanding NACE SP0472: The Modern Standard for Refinery Weldments
If you are searching for a NACE RP0472 PDF, you are looking for a foundational document in petroleum refining safety. However, it is important to know that the "RP" (Recommended Practice) designation was updated years ago to SP (Standard Practice).
The current active version is NACE SP0472-2020, titled "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments". Why This Standard Matters
In the late 1960s, a series of failures in hard weld deposits led to the development of this standard to mitigate Sulfide Stress Cracking (SSC) and other forms of environmental cracking. It specifically targets P-No. 1 carbon steels (those with a tensile strength up to 70,000 psi) used in pressure vessels, piping, and heat exchangers. Key Technical Focus Areas
The latest version of the standard NACE SP0472-2020 focuses on two primary cracking mechanisms:
Hydrogen Stress Cracking (HSC/SSC): Controlled primarily through hardness limits. The standard typically mandates a maximum weldment hardness of 200 HBW (Brinell) to prevent cracking in wet H2Scap H sub 2 cap S environments.
Alkaline Stress Corrosion Cracking (ASCC): Unlike HSC, controlling hardness alone isn't enough for ASCC. This requires managing residual tensile stresses, often through Post-Weld Heat Treatment (PWHT). Evolution of the Standard
The document has undergone several critical revisions since its inception in 1972:
NACE SP0472 (formerly RP0472), titled "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments," is a critical standard used to ensure the integrity of refinery equipment.
The following sections provide a structured overview of the standard's core principles, suitable for an essay or technical report. 1. Objective and Scope
The primary goal of NACE SP0472 is to provide methods for producing weldments in P-No. 1 carbon steels that are resistant to environmental cracking in sour and corrosive refinery services. It specifically addresses two main cracking mechanisms:
Hydrogen-Induced Cracking (HSC): Often manifested as Sulfide Stress Cracking (SSC) in the presence of wet H2Scap H sub 2 cap S
Alkaline Stress Corrosion Cracking (ASCC): Cracking caused by specific refinery environments like amine or caustic services. 2. The Role of Hardness Control
A central tenet of the standard is that hard microstructures (like martensite) are significantly more susceptible to hydrogen embrittlement. To mitigate this risk, the standard mandates strict hardness limits:
Weld Deposit: Generally restricted to a maximum of 200 Brinell (HB).
Heat-Affected Zone (HAZ): Hardness in the HAZ is more difficult to measure in the field, so the standard relies on procedural controls rather than just spot testing. Overview of NACE International Standard RP0472
Understanding the Latest NACE RP0472 Standard for Pipeline External Corrosion Protection
The National Association of Corrosion Engineers (NACE) has recently updated its standard for pipeline external corrosion protection, RP0472. This new standard, available in PDF format, provides guidelines for protecting pipelines from external corrosion, a critical concern for the oil and gas industry.
What is NACE RP0472?
NACE RP0472 is a recommended practice (RP) that outlines procedures for protecting pipelines from external corrosion. The standard covers various aspects, including:
What's New in the Latest NACE RP0472 PDF?
The updated NACE RP0472 standard includes several significant changes and additions:
Why is NACE RP0472 Important?
External corrosion is a significant threat to pipeline integrity, potentially leading to costly repairs, environmental damage, and even safety risks. The NACE RP0472 standard helps pipeline operators mitigate these risks by:
Get Your Copy of NACE RP0472 PDF Today
To ensure your pipeline operations are protected from external corrosion, download your copy of the latest NACE RP0472 PDF today. This standard is a valuable resource for:
By following the guidelines outlined in NACE RP0472, you can help ensure the long-term integrity of your pipelines and minimize the risks associated with external corrosion.
Download NACE RP0472 PDF Now
You can obtain a copy of the NACE RP0472 PDF from the National Association of Corrosion Engineers (NACE) website or through authorized distributors. Stay ahead of corrosion risks and ensure pipeline integrity – download your copy today!
The current version of this standard is NACE SP0472-2020, which replaced the older RP0472 designation. This standard provides the industry-consensus guidelines for preventing environmental cracking in carbon steel weldments within corrosive petroleum refining environments. Understanding NACE SP0472 (Formerly RP0472)
NACE SP0472, titled "Methods and Controls to Prevent In-Service Environmental Cracking of Carbon Steel Weldments in Corrosive Petroleum Refining Environments," is a critical document for engineers and fabricators working with P-No. 1, Group 1 or 2 carbon steels. To find the most current information or a
The transition from "RP" (Recommended Practice) to "SP" (Standard Practice) reflects a reorganization of the document into a specification-style format. The most recent active edition was reaffirmed in 2020. Core Objectives and Scope
The standard establishes guidelines to prevent various forms of in-service environmental cracking, specifically: NACE SP0472-2020 - ANSI Webstore