weld pipes b31 3 guide concavity

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  • 1.0 ACCEPTANCE CRITERIA FOR COMPLETED WELDS

    2009-1-5 · Attachment 2, ASME B31.3, “Process Piping” Acceptance Criteria Page 2 of 4 1.3 Progressive sampling for radiographic examination of welds shall be in accordance with Exhibit 1. WELD REINFORCEMENT TABLE ASME B31.3 Thickness of Base Material Thickness of Reinforcement or Internal Weld Protrusion ¼ in. and under 1 16 in. Over ¼ in. to ½ in. 1/

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  • ASME B31.3 Process Piping Guide - Los Alamos National ...

    2014-9-17 · ASME B31.3 Code 'Process Piping,” It was last updated for the 2002 edition. ASME B31.3 applies to process piping and tubing systems at Los Alamos National Laboratory (LANL). This Guide also contains ASME B31.1 and AWWA compliant Piping Specifications. Guide users are responsible for compliance with all aspects of the applicable Code. This

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  • Depth of root surface concavity ASME b31.3 - ASME ...

    2013-4-23 · DD. RE: Depth of root surface concavity ASME b31.3. stanweld (Materials) 23 Apr 13 09:36. There is no defined depth. As long as the thickness of the deposited weld metal including reinforcement is greater than or equal to the thinner of the materials welded root concavity is acceptable. RE: Depth of root surface concavity ASME b31.3.

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  • ASME B31.3 INTERPRETATIONS NO. 14

    Question (3): Does ASME B31.3-1993Edition, Addendab, address the acceptance criteria for root surface concavity offillet welds? Reply (3): No. Question (4): In accordance with ASME B31.3-1993Edition, Addenda b, does melt-throughofa pressure boundary with a fillet weld constitute a violation ofthe Code? Reply (4): The Code does not address this ...

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  • Minumum Weld Reinforcement Asme B31.3 - ASME

    2013-1-26 · Your max weld reinforcement at the weld root would be 1/8' for that thickness base metal. I dont believe there is a paragragh discussing this in B31.3 other than to guide you to this table. Now in regards to minimum weld reinforcement the code provides this criteria listed as 'depth of root surface concavity'.

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  • A review of the causes and acceptance of shape ... - TWI

    ASME B31.3 requires that the 'total joint thickness, including weld reinforcement, must be greater than the weld thickness'. BS EN ISO 5817 sets upper limits related to the quality level, eg for thicknesses > 3mm Moderate, (D), h ≤ 0.2t but max 2mm for Stringent, (B), h ≤ 0.05t but max 0.5mm.

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  • General Welding Guidelines - MCAA

    2016-4-5 · B31.1, B31.9, etc.), that preheat shall be used for production welding. Welding on metal that is wet is strictly prohibited; wet metal shall be heated until it is at least warm to the touch to assure removal of moisture. The following additional preheat is recommended …

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  • allowed root penatration according to B31.1

    2009-9-16 · allowed root penatration according to B31.1. By 803056 Date 09-15-2009 14:42. I would agree if he was working to B31.3, but in this case he is using B31.1. I don't have the most recent edition of B31.1, but if my recollection is correct there is no limit imposed provide water or steam can still get through, but even that isn't a 'code ...

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  • Acceptance Criteria for Weld Defects | welding & NDT

    2019-4-7 · (Where, ‘T’ – Thickness of the weld metal excluding any allowable reinforcement). 3. Any group of indications (inline) with an aggregate length of more than T (within a length of 12T) shall be considered unacceptable except when the distance between the successive discontinuities exceeds 6L.

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  • Acceptable Design for Unequal Wall Thickness

    2020-6-1 · Internally, either a straight bore followed by a 30° slope or a taper bore at a maximum slope of 1 to 4 for a minimum distance of 2 times the pipe minimum wall are required. The surface of the weld can also be tapered to accommodate differing thickness. This taper should not exceed 30°.

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  • Pipe Weld Joints in Plants and Pipelines | ASME B31

    5.1.3 Transition Pieces When joining pipes of different material grades (yield strengths), a transition piece shall be used if the wall thickness of lower grade material is greater than 1.5 times the wall thickness of higher grade material. Graphic details of the joint designs are shown in ASME B31.3, ASME B31.4 and ASME B31.8. 5.2 Socket Welds

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  • Distance of Piping weld to weld as per ASME B 31.3

    2018-8-24 · Distance of Piping weld to weld as per ASME B 31.3. By MBSims Date 11-26-2007 05:27. Minimum distance between girth welds is usually covered in the fabrication or installation specifications and is not a code requirement. If you want to add a weld not shown on the isometric drawing, you usually have to get the approval of the piping designer ...

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  • Pipe Wall Thickness Calculation According Asme B31

    ASME B31.3-2002 Basic casting quality factors Ec Table A-1B. ASME B31.3-2002 Basic quality factors for longitudinal longitudinal weld joints in pipes, tubes, and fittings Ej 12 ASTM A10 carbon ste Ratings. T (kPa), for 13 ANSI B16.

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  • Asme B31 3 Process Piping Guide - forum.apprendre-a ...

    2009-3-10 · B31.3ASME B31.3-2018 : Process PipingThe Engineer's Guide to Plant Layout and Piping Design for the Oil and Gas IndustriesASME B31.3b-2001 Addenda to ASME B31.3-1999 Edition, Process PipingCASTI Guidebook to ASME

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  • Welding Procedures (overview) | QA/QA Construction

    B31.3 Petrolium Refinery Piping B31.4 Oil Transportation Piping B31.5 Refrigeration Piping ... successive passes or 1/3 of the weld volume prior to interruption (allowing to cool to ambient temperature). ... Internal concavity or suck back is a condition where the weld metal has contracted as it cools and has been drawn up into the root of the ...

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  • Table 341.3.2 Acceptance Criteria for Welds and ...

    2005-7-5 · 341.4.2–341.5.1 ASME B31.3-2004 Table 341.3.2 Acceptance Criteria for Welds and Examination Methods for Evaluating Weld Imperfections (Cont’d) NOTES: (1) Criteria given are for required examination. More stringent criteria may be specified in the engineering design. See also paras. 341.5 and 341.5.3.

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  • General Welding Guidelines - MCAA

    2016-4-5 · tolerance, the surfaces shall be ground or weld metal shall be added to bring the surfaces into alignment. When the surfaces are ground or weld metal is added, the taper from the original surface shall not exceed 30 maximum on internal original surfaces and 3:1 (about 18 ) maximum on external surfaces. The minimum wall thickness required by

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  • Acceptable Design for Unequal Wall Thickness

    2020-6-1 · The surface of the weld can also be tapered to accommodate differing thickness. This taper should not exceed 30°. It may be necessary to deposit weld metal to assure that these limits are not violated. Below some tables with acceptable design for unequal wall thicknesses ASME B31.8. (1) No minimum when materials joined have equal specified ...

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  • Welding Pressure Pipeliners and Piping Systems

    2015-6-5 · to weld the root pass. In any case, it is best to have welders either (1) weld opposite one another or (2) evenly spaced around the pipe. This will minimize the amount of distortion in the pipe and prevent the gap from opening or closing. If possible, it is also desirable not to fin-ish a weld in exactly the bottom of the pipe because the tie ...

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  • Root Concavity - Suck Back - QA/QC Tips & Guides

    2021-5-21 · A shallow groove that may occur in the root of a butt weld. Common causes Root concavity is caused by shrinkage of the weld pool in the through-thickness direction of the weld. Melting of the root pass by the second pass can also produce root concavity. This imperfection is frequently associated with TIG welding with the most common cause being poor preparation leaving the root gap either too ...

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  • Commentary on Recent Changes in ASME B31.3 Post

    2017-10-26 · The 2014 Edition of ASME B31.3, Process Piping [1], introduced significant changes to the post weld heat treatment (PWHT) requirements for P-No. 1 carbon steel materials. In particular, PWHT is no longer a mandatory requirement for any wall thickness provided that multi-pass welding is employed for wall thicknesses greater than 5 mm (3/16 of an inch) and a minimum preheat of 95°C (200°F) is ...

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  • ASME B31.3, MSS SP97 - Steel Pipes Manufacturers

    2009-3-10 · B31.3ASME B31.3-2018 : Process PipingThe Engineer's Guide to Plant Layout and Piping Design for the Oil and Gas IndustriesASME B31.3b-2001 Addenda to ASME B31.3-1999 Edition, Process PipingCASTI Guidebook to ASME

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  • Asme B31 3 Process Piping Guide - forum.apprendre-a ...

    ASME B31.3 requires leak testing of all piping systems other than Category D systems. For piping in Category D Fluid Service, the piping may (at the Owner's option) be put in service without a leak test and examined for leakage during the initial operation of the system. This is an initial service leak test.

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  • Process Piping: The Complete Guide to ASME B31.3,

    2018-8-24 · Distance of Piping weld to weld as per ASME B 31.3. By MBSims Date 11-26-2007 05:27. Minimum distance between girth welds is usually covered in the fabrication or installation specifications and is not a code requirement. If you want to add a weld not shown on the isometric drawing, you usually have to get the approval of the piping designer ...

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  • Distance of Piping weld to weld as per ASME B 31.3

    2005-7-5 · 341.4.2–341.5.1 ASME B31.3-2004 Table 341.3.2 Acceptance Criteria for Welds and Examination Methods for Evaluating Weld Imperfections (Cont’d) NOTES: (1) Criteria given are for required examination. More stringent criteria may be specified in the engineering design. See also paras. 341.5 and 341.5.3.

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  • Table 341.3.2 Acceptance Criteria for Welds and ...

    2021-3-2 · b) Weld Joint Quality factors from ASME B31.3, 302.3.4 and Table A-1B; c) Increased Joint Quality Factors by performing supplemental NDE from ASME B31.3 Table 302.3.4; Determining weld joint quality factor may be part of an internal pressure problem since the joint factor Ej is used in the formulas for determining required thickness or internal ...

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  • API 570 Quiz (ASME 31.3 – Quality Factor of Weld

    2016-4-5 · tolerance, the surfaces shall be ground or weld metal shall be added to bring the surfaces into alignment. When the surfaces are ground or weld metal is added, the taper from the original surface shall not exceed 30 maximum on internal original surfaces and 3:1 (about 18 ) maximum on external surfaces. The minimum wall thickness required by

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  • General Welding Guidelines - MCAA

    2020-6-1 · The surface of the weld can also be tapered to accommodate differing thickness. This taper should not exceed 30°. It may be necessary to deposit weld metal to assure that these limits are not violated. Below some tables with acceptable design for unequal wall thicknesses ASME B31.8. (1) No minimum when materials joined have equal specified ...

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  • Acceptable Design for Unequal Wall Thickness

    2021-5-21 · A shallow groove that may occur in the root of a butt weld. Common causes Root concavity is caused by shrinkage of the weld pool in the through-thickness direction of the weld. Melting of the root pass by the second pass can also produce root concavity. This imperfection is frequently associated with TIG welding with the most common cause being poor preparation leaving the root gap either too ...

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  • Bioprocessing Piping and Equipment Design: A

    Bioprocessing Piping and Equipment Design A Companion Guide for the ASME BPE Standard st dton. Wlla . ll tt. ... ASME B31.3 Process Piping Code, 167, 182 ASME BPV Code, 148 ... internal weld concavity, 130 International Plumbing Code (IPC), 213 ...

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  • ASME B31.3 Process Piping - PSIG Home Page

    2019-10-9 · ASME B31.3 Process Piping Course 15. Nonmetallic Piping BECHT ENGINEERING COMPANY, INC. Nonmetallic Piping -33 Reinforced Thermosetting Resins Support – Support elements must be designed to provide low concentrated stresses and protect the piping from abrasion. (Typical guide and anchor – Conley) BECHT ENGINEERING COMPANY, INC. Nonmetallic ...

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  • SPECIFICATION FOR PIPEWORK WELDING, INSPECTION,

    2015-3-2 · Alignment of Pipes, Branches, Flanges and Fittings Tack Welding WORKMANSHIP ... Weld history log shall be supplied listing all welds denoting type of weld and which welder ... B31.3 1993 Edition plus Addenda B31.3a 1993, the requirements of this ...

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  • (PDF) LANL Engineering Standards Manual OST220-03

    LANL Engineering Standards Manual OST220-03-01-ESM Chapter 6-Mechanical Section D20 Plumbing/Piping/Vessels – App A, ASME B31.3 Process Piping Guide ASME B31.3 Process Piping Guide Revision 1 RECORDS OF REVISION

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  • Welding Procedures (overview) | QA/QA Construction

    B31.3 Petrolium Refinery Piping B31.4 Oil Transportation Piping B31.5 Refrigeration Piping ... successive passes or 1/3 of the weld volume prior to interruption (allowing to cool to ambient temperature). ... Internal concavity or suck back is a condition where the weld metal has contracted as it cools and has been drawn up into the root of the ...

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  • 11 Questions & Answers from ASME B31.3 that a

    2021-6-10 · 2 ASME B31.3. Chapter 1 Part 3. Fluid service. 3 Table A-1 ASME B31.3-2002 Basic allowable stresses in tensions for metals Carbon steel pipes and tubes. 4 Table A-1B. ASME B31.3-2002 Basic casting quality factors E Table A-1B. ASME B31.3-2002 Basic quality factors for longitudinal weld joints in pipes, tubes, and fittings Ej

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  • Pipes. Wall Thickness Calculation According ASME

    2014-3-14 · • B31 Hydrogen Section Committee to develop a new code for H 2 piping and pipelines – Include requirements specific to H 2 service for power, process, transportation, distribution, commercial, and residential applications – Balance reference and incorporation of applicable sections of B31.1, B31.3 and B31.8

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  • Code for Hydrogen Pipelines - Energy

    Determine Pipe wall thickness as per ASME B31.3. Enter a pipe size along with material grade, design pressure and temperature etc. and obtain required thickness and next appropriate schedule accordingly.

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  • Pipe Wall Thickness Calculation (ASME B31.3)

    2020-2-11 · Weld Acceptance Criteria 3-A vs. AWS D18.1 (Tube/Pipe) •Many weld acceptance criteria are essentially the same, e.g. - no incomplete weld penetration, free from cracks & pits etc. •D18.1 is more explicate on the acceptance of weld features, such as ID convexity, concavity, allowance of slag like deposits on the weld surface

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  • NDE procedures for welds in B31.3 | World Of NDT

    2020-11-16 · This requires a single exposure radiograph in accordance with ASME B31.3 para. 344.5.1 at a point within a specified extent of welding. For girth, miter, and branch groove welds the minimum requirement is. for sizes ≤DN 65 (NPS 21⁄2), a single elliptical exposure encompassing the entire weld …

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  • Welding Procedures (overview) | QA/QA Construction

    B31.3 Petrolium Refinery Piping B31.4 Oil Transportation Piping B31.5 Refrigeration Piping ... successive passes or 1/3 of the weld volume prior to interruption (allowing to cool to ambient temperature). ... Internal concavity or suck back is a condition where the weld metal has contracted as it cools and has been drawn up into the root of the ...

    Get Price
  • SPECIFICATION FOR PIPEWORK WELDING, INSPECTION,

    2015-3-2 · Alignment of Pipes, Branches, Flanges and Fittings Tack Welding WORKMANSHIP ... Weld history log shall be supplied listing all welds denoting type of weld and which welder ... B31.3 1993 Edition plus Addenda B31.3a 1993, the requirements of this ...

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  • What’s new in ASME B31.3-2020? ASME B31.3 2020 vs

    The impact test requirement criteria for Weld Metal of the welding procedure qualification test coupon has been changed in table 323.2.2 of ASME B31.3-2020. In code B31.3-2018, the impact test was required for design minimum temperature<-29 Deg C. However, the latest edition of B31.3 requires an impact test for design minimum temperature below ...

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  • Code for Hydrogen Pipelines - Energy

    2014-3-14 · • B31 Hydrogen Section Committee to develop a new code for H 2 piping and pipelines – Include requirements specific to H 2 service for power, process, transportation, distribution, commercial, and residential applications – Balance reference and incorporation of applicable sections of B31.1, B31.3 and B31.8

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  • (PDF) LANL Engineering Standards Manual OST220-03

    LANL Engineering Standards Manual OST220-03-01-ESM Chapter 6-Mechanical Section D20 Plumbing/Piping/Vessels – App A, ASME B31.3 Process Piping Guide ASME B31.3 Process Piping Guide Revision 1 RECORDS OF REVISION

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  • 11 Questions & Answers from ASME B31.3 that a

    2021-6-10 · 2 ASME B31.3. Chapter 1 Part 3. Fluid service. 3 Table A-1 ASME B31.3-2002 Basic allowable stresses in tensions for metals Carbon steel pipes and tubes. 4 Table A-1B. ASME B31.3-2002 Basic casting quality factors E Table A-1B. ASME B31.3-2002 Basic quality factors for longitudinal weld joints in pipes, tubes, and fittings Ej

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  • Pipes. Wall Thickness Calculation According ASME

    2016-4-24 · Problem with AS4041 formula compared to ASME B31.3 formula. The intrados should get thicker and the extrados thinner. As thickness is 'lost'during the bending process, it would be normal. to multiply the required wall thickness at the extrados by a factor of. 1.1 to 1.125 dependent upon how 'tight'the bend radius is.

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  • 239389503-AS4041-ASME-B31-3-Pipe-Wall-Thickness

    Fundamentals of Visual tools should be used that: (1) comply with the project re- Examination quirements, (2) are adequate for the intended accuracy, 3.1 General. Visual examination reveals surface flaws, and (3) satisfy the need of the inspection. and is a valuable indication of weld quality. It is a simple, 2.4 Experience and Training.

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