It is applicable to all pipelines and piping systems within the scope of: ASME B 4 – Pipeline Transportation Systems for Liquid. Hydrocarbons and Other. ASME B31G – Level 2 Option, otherwise known as RSTRENG is most commonly used in the pipeline industry. However, ASME B31G Level 2 that is based on. Integration with NDT tools. ▫ 3D surface measurements. ▫ UT. ▫ What’s next? ▫ Pit gage data entry interface. ▫ ASME B31G (), DNV RP-F
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We need your help to maintenance this website. Ase help us to share our service with your friends. October 24, The next edition of this Manual is scheduled for publication in ASME issues written replies to inquiries concerning interpretations of technical aspects of this Manual. Errata to codes and standards may be posted on the ASME Web site under the Committee Pages to provide corrections to incorrectly published ssme, or to correct typographical or grammatical errors in codes and standards.
Such errata shall be used on the date posted. The Committee Pages can be found at http: There is an option available to automatically receive an e-mail notification when errata are posted to a particular code or standard. The Standards Committee that approved the Manual was balanced to assure that individuals from competent and concerned interests have had b31h opportunity to participate. The proposed Manual was made available asne public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large.
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Correspondence With the B31 Committee. It has also been recognized, through theoretical analysis, scientific research and testing, and industry operating experience, that some amount of metal loss due to asje can be tolerated without impairing the ability of the pipeline to operate safely. The G31g document provided pipeline operators with a simplified evaluation method based on the results of analysis and tests.
The application of B31G has enabled pipeline operators to reliably determine safe operating pressure levels for pipe affected by corrosion, and to determine whether repairs are necessary in order to continue operating safely. A majority of these other methods are based on the same theoretical model from which the original B31G method was derived, but may b3g1 some refinement in accuracy.
Subsequently, an effort was undertaken to update the B31G document to recognize certain other corrosion evaluation methods that have proven sound and that have seen successful use in the pipeline industry. Incorporation of these other methods into a recognized Code document provides the pipeline operator or axme user with a formalized framework within which to use such methodologies, as well as a wider range of codified technical options with which to make an evaluation.
The revision of B31G reflected those objectives. Mauro, American Electric Power J. Payne, Alstom Power, Inc. Rinaca, Dominion Resources, Inc. Silvia, Process Engineers and Constructors, Inc. Sperko, Sperko Engineering Services, Inc. Tatar, FM Asmw K. Soni, Delegate, Engineers India Ltd. Rangus, Ex-Officio, Bechtel J.
Appleby, ExxonMobil Development Co. Beyer, Fluor Enterprises, Inc. Bodenhamer, Enterprise Products Co. Campbell, Air Liquide J. Chin, TransCanada Pipeline U. Coym, Intertek Moody C. Flenner, Flenner Engineering Services J. Frey, Stress Engineering Service, Inc. Frikken, Becht Engineering Co. Grichuk, Fluor Enterprises, Inc. Holbrook, Babcock Power, Inc. Minichiello, Bechtel National, Inc.
Paulin, Paulin Research Group R.
PIPELINE CORROSION ASSESSMENT – ASME B31G COMPLIANCE
Rodabaugh, Honorary Member, Consultant W. Breen, Becht Engineering Co. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may interact with the Committee by requesting interpretations, proposing revisions, and attending Committee meetings. Correspondence should be addressed to: Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the 3b1g of the Standard.
Approved revisions will be published periodically. The Committee welcomes proposals for revisions to this Standard.
ASME B31G – Free Download PDF
Such proposals should be as specific as possible, citing the paragraph number sthe b1g wording, and a detailed description of the reasons for the proposal, including any pertinent documentation. Cases may be issued for the purpose of providing alternative rules when justified, to permit early implementation of an approved revision when the need is urgent, or to provide rules not covered by existing provisions. The request should identify the standard, the paragraph, figure or table number sand be written as a Question and Reply in the same format as existing Cases.
Requests aasme Cases should also indicate the applicable edition s of the standard to which the proposed Case applies.
Upon request, the B31 Standards Committee will render an interpretation of any requirement of the Standard. Interpretations can only be rendered in response to a written request sent to the Secretary of the B31 Standards Committee.
ASME B31G Corrosion Calculator : Pipeng Toolbox
The request for an interpretation should be clear and unambiguous. Cite the applicable paragraph number s and the topic of the inquiry. Cite the applicable edition of the Standard for which the interpretation is being requested. Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation.
The inquirer may also include any plans or drawings that are necessary to explain the question; however, they should not contain proprietary names or information.
Requests that are not in this format may be rewritten in the appropriate format by the Committee prior to being answered, which may inadvertently change the intent of the original request. ASME procedures provide for reconsideration of any interpretation when or if additional information that might affect an interpretation is available. The B31 Standards Committee regularly holds meetings, which are open to the public. Persons wishing to attend any meeting should contact the Secretary of the B31 Standards Committee.
Changes given below are identified on the pages by a margin note, 12placed next to the affected area. Page Location Change 2 1. It is applicable to all pipelines and piping systems within the scope of the transportation pipeline codes that are part of ASME B31 Code for Pressure Piping, namely: Where the term pipeline is used, it may also be read to apply to piping or pipe conforming to the acceptable applications and within the technical limitations discussed below.
The methods and criteria provided herein do not address failure by perforation. Evaluation of individual deep pits within a generally corroded area should account for the effect of wall loss due to general corrosion.
High longitudinal stresses in tension acting on metal loss having a significant circumferential extent, in unrestrained piping, could change the failure mode from longitudinal to circumferential. The methods and criteria provided herein do not address circumferential failure due to high longitudinal tensile stresses.
Also, the combination of hoop stress due to internal pressure and longitudinal compression could interact to lower the failure pressure in the metal loss area. The methods and criteria provided herein do not address buckling or wrinkling, or interaction of hoop stress with longitudinal compressive stresses. These tables are carried over without change from earlier editions of ASME B31G and have been supplemented by the addition of tables in metric units.
It is intended that a Level 0 evaluation be conducted in the field without the need for performing detailed calculations. It is intended that a Level 1 evaluation be conducted in the field by an engineer, corrosion technician, coating inspector, or other individual having appropriate training.
A Level 1 evaluation is also suitable for use in prioritizing metal-loss anomalies identified by inline inspection. It typically relies on detailed measurements of the corroded surface profile, accounting for the actual distribution of metal loss, and involves repetitive computations that may be facilitated by the use of computer software or spreadsheets.
It is intended that a Level 2 evaluation be conducted by an engineer or technician having appropriate training. A Level 2 evaluation may be suitable for use in prioritizing metal-loss anomalies identified by high-resolution inline inspection. It is intended that a Level 3 evaluation be conducted by a technical specialist having appropriate expertise in the subject of fitness-for-service assessment.
Statistical representations of material properties may be used with Levels 1, 2, or 3 for purpose of establishing a probability of failure; however, the details of such analyses are outside the scope of this document. It is not a property specified in a material grade or finished product standard. Research indicates that it may be defined variously as given below.
Sflow shall not exceed SMTS. Linear interpolation of strength values is allowed between listed temperatures.
Where more than one definition applies, the various ase produce acceptable though not necessarily identical results when used with any given evaluation method. It is noted that Sflow was defined as 1.
This definition remains an inherent element of the Level 0 assessment and is recommended with the Level 1 assessment performed in accordance with para. If known with confidence, the actual uncorroded wall thickness may be used with a Level 1, Level 2, or Level 3 evaluation, with a suitable assme of the hoop stress due to internal pressure.
“ASME B31G” Piping Code Enhancements for AutoPIPE
Other seam and weld types shall be investigated to establish fracture properties before applying methods described herein to metal loss affecting such welds. Consideration shall be given to the disposition of workmanship flaws or manufacturing flaws within a weld or seam asne could interact with metal loss due to corrosion.
In addition, the following considerations apply: