grinding the seam pipe is permitted

grinding the seam pipe is permitted

1.0 JOINT FIT-UP AND ALIGNMENT

grinding. 1.5 Parts to be joined by a tee or fillet weld shall be brought into as close contact as is ... 2.1.6 When the pipe size is less NPS 6 or the project involves a limited number of welds ... 2.1.8 As-welded surfaces are permitted; however, the surface of welds shall be sufficiently free from coarse ripples, grooves, overlaps, abrupt ...

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General Welding Guidelines - MCAA

attachments and wedges to bring pipe into alignment is permitted. If the base metal is alloy steel, the preheat required by the WPS shall be used for tack welding and for attachment of alignment materials. Lugs should be removed by cutting and grinding followed by visually inspecting the pipe surface for defects. Care should be taken not to grind

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1.0 ACCEPTANCE CRITERIA FOR COMPLETED WELDS

1.2.1 As-welded surfaces are permitted; however, the surface of welds shall be sufficiently free from coarse ripples, grooves, overlaps, abrupt ridges, undercut, and valleys. 1.2.2 The surface condition of the finished welds shall be suitable for the proper interpretation of nondestructive examinations.

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Support welded without Flush grinding the seam

Feb 13, 2008  Deal All, A Saddle support is welded on a Spiral welded API pipe without flush grinding the weld seam. What is the danger exposed to the portion of weld seam remains under the support. What is the remedy to be done to rectify if this is not an acceptable method of fabrication.

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Grinding a weld into acceptance

Jan 03, 2014  Well, it appears you have your answer, but to put it simply: YES, the welder is allowed to grind down the surface of the weld in order to bring it into compliance. That may be because of roughness, excessive reinforcement, unacceptable weld profile, etc. Have a Great Day, Brent. By 803056 Date 12-26-2013 21:31.

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07139 METHODOLOGY FOR ASSESSING THE EFFECTS OF

Grinding is permitted to a depth of 10% of the nominal pipe wall with no limit on length. Grinding is permitted to a depth greater than 10% up to a maximum of 40% of the nominal pipe wall, with metal removal confined to a length given by the following equation: where D = nominal outside diameter of pipe

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ASME B31.3 - Longitudinal Seam weld - Pipelines, Piping ...

Jun 05, 2018  We have ordered pipe base on ASTM A358 EFW TYP304 CLASS 1,30" NPS 1" thick. The manufacturer (from India) produces the pipe with 2 plates, resulting in 2 longitudinal seam. Their argument was, nowhere is A358 it mention two seam cannot be used, obviously a flawed argument. I am trying to counter with B31.3 or A358, just dont know the right ...

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Longitudinal weld seam on piping.

Sep 25, 2005  The pipe rips open longitudinally until the tear comes to about 2" or 3" from the weld and then makes a 90 degree turn and tears parallel to the weld seam for another foot or so. I'm always suprised to see it as I would think the failure would be progressing with enought velocity and ferocity to continue right through the weld without even ...

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Industrial Wastewater: Permitted and Prohibited Discharge ...

Industrial Wastewater: Permitted and Prohibited Discharge Reference For help in characterizing any potential hazard and how best to discharge, treat, or remove it, contact the IW program manager. Itemized SLAC Permitted Discharges Details for permitted discharges follow on the following pages.

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grinding the inside seam of steel tubes - BINQ Mining

Nov 06, 2012  grinding a weld inside a pipe 8′ from the opening.how?. I need to butt weld 2 sections of steel tubing that are 8 feet long, 4" ID. How would you grind the weld seam inside a 4" tube that is 8 feet from the opening.? »More detailed

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Inspecting Seamless Pipe Historic Pittsburgh

After straightening, the pipe is subjected to various finishing operations. All categories of pipe are routed to cutting-off machines, which remove the rough edges, followed by inspection and seam grinding. Pipes requiring threading are sent to threading machines and then inspected and tested to ensure product consistency.

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Edge Preparation and Alignment for Welding of Pipes » The ...

Tags: #piping_engineering #piping_welding #edge_preparation #piping_fabrication Edge Preparation The edges to be welded shall be prepared to meet the joint design requirements by any of the following methods recommended: Carbon Steel : Gas cutting, machining or grinding methods shall be used. After gas cutting, oxides shall be removed by chipping or grinding. Low Alloy Steels (containing up to ...

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Automatic grinding machine for pipe welding seam

Automatic grinding machine for pipe welding seam. Model:JT-SDJ. Function: polish and grinding for welding seam. Specification: Model. JT-SDJ. Motor power. 4KW. Motor rotate speed.

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Non-Destructive Testing of Straight Seam Steel Pipe

Sep 27, 2019  The steel pipe is divided into seamless steel pipe and welded steel pipe. Among them, the commonly used welded steel pipe can be divided into three types according to the type of weld, such as high-frequency welded pipe( ERW ), straight seam submerged arc welded pipe( LSAW ) and spiral submerged arc welded pipe( SSAW).

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Rules for Classification and Construction II Materials and ...

The longitudinal seams of pipes shall be offset relative to one another at the pipe joints by at least 50 mm. Intersecting butt welds in hull structures are allowed; if possible, however, the first (e.g. longitudinal) welded joint shall be completed and cleanly finished at the ends before the second (e.g. transverse) joint is

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grinding the inside seam of steel tubes - BINQ Mining

Nov 06, 2012  Tube / Pipe Inside ID polishing machine: An automatic system for polishing grinding or brushing the inside of pipe and tube. . Polishing and grinding machine for polishing the to follow the weld seam. » More detailed.

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How to remove steel pipe tube longitudinal welding seam ...

How to remove steel tube longitudinal welding seam by TCM welds seam planishing machine? Trancar Industries Co.,Ltd provide long welds planisher for steel cylinder shell,round pipe tube exterior long welds planishing and flatten. It could process follows parameter pipe exterior long welding line. A:Pipe Diameter:200-1000mm. B:Max.Length:1500 mm.

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Pipe Alignment tolerances as per ASME B31.3 - Google Groups

Sep 25, 2012  We are going to erect the pipe in the pipe rack. The construction is erecting pipe, doing fit-up, and welding. But pipe line in the rack is not straight. they are going the way like snake. Our consturction code is ASME B31.3 process piping. I wanted to know what is the acceptance criteria for the straightness if the line pipe.

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5 Types Of Welding Seams Hot Air Tools

The double-V seam is also known as an X-seam and double V-joint. It is a type of butt weld and consists of a combination of two V-seams on each of the two sides of the components to be joined. Single butt welds are similar to a bevel joint, but instead of only one side having the beveled edge, both sides of the weld joint are beveled.

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OSHA 30 Flashcards Quizlet

OSHA 30. Those who work on a crane or near crane operations must be trained. Which of the following is true for this training? D. All of the above. Certain inspections of crane equipment may be made by a (n) ___________ person; however, crane inspections are typically required to be made by a (n) __________ person. Nice work!

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Classification of Discontinuities

Definitions • Discontinuity – An interruption (crack, forging lap, seam, inclusion, porosity, etc.) in the normal physical structure or configuration of an article – It may or may not be a defect • Defect – a discontinuity that interferes with the usefulness of a part or exceeds acceptability limits established by

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Activity Hazard Analysis (AHA)

Contractor Required - AHA COE EM 385-1-1, para 01.A.13.a: AHAs shall define the activities being performed and identify the work sequences, the specific anticipated hazards, site conditions, equipment, materials and the control measures to be

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NCPWB Technical Resources - National Certified Pipe ...

Steel Pipe Fitting Data. This Excel file provides dimensional information for various products such as fittings, pipes, angle, channel, bolts, and many more. (.xls format) Purge Flow Calculator. The Excel document calculates purge flow rates and provides examples. Purge Tips. The document gives tips on purging various materials and pipe sizes.

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Certification of Line-pipe for oil and gas service – AMARINE

Oct 23, 2020  Pipe lengths should be minimum 39’6” and maximum 40’6”, with the average length as near to 40’ as possible. The use of diameter tapes to measure the minimum outside diameter for pipe with a 20” OD and smaller as stated in API Specification 5L, Table 6.3, “Pipe Ends” section, is not acceptable. 24″ line-pipe out-of-roundness ...

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2017- 3R - Höhler et al - Pipe features identified during ILI

manufacturing process certain cosmetic repairs are permitted in the tolerance frame of technical delivery conditions. ... Seam undertrim is a linear feature standing proud of the pipe surface on the line of the seam weld, caused by insufficient weld flash removal. ... Pipes which are affected by features listed above can be repaired by grinding ...

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How to grind, blend and finish a weld seam Norton Abrasives

Mar 19, 2019  Grinding wheels should be the choice for carbon steel. They will remove the weld seam quickly and since the appearance of scratches are not such an issue compared to stainless steel, are ideal for this operation. Typically, in the spectrum of 5 to 35 degrees to the horizontal (depending on the grinding wheel used) should be the target.

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Non-Destructive Testing of Straight Seam Steel Pipe

Sep 27, 2019  The steel pipe is divided into seamless steel pipe and welded steel pipe. Among them, the commonly used welded steel pipe can be divided into three types according to the type of weld, such as high-frequency welded pipe( ERW ), straight seam submerged arc welded pipe( LSAW ) and spiral submerged arc welded pipe( SSAW).

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Flush grinding of weld - Google Groups

Jun 20, 2012  Grinding the welds is permitted to the extent that at no place should the weld metal "fall below the surface of the adjoining base materials" -- see UW 35 (d). Proving that may be a difficult job, hence always leave a reinforcement unless constrained by design.

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Dent Assessment and Management – Pipeline Safety Consultants

Dents containing metal loss resulting from corrosion or grinding where less than the minimum wall thickness permitted by the component specification remains; Dents that affect pipe curvature at a girth weld or a longitudinal seam weld; Dents with a depth greater than 6% of the nominal pipe diameter (0.250 inches (6.4 mm) in-depth for a pipe ...

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Rules for Classification and Construction II Materials and ...

The longitudinal seams of pipes shall be offset relative to one another at the pipe joints by at least 50 mm. Intersecting butt welds in hull structures are allowed; if possible, however, the first (e.g. longitudinal) welded joint shall be completed and cleanly finished at the ends before the second (e.g. transverse) joint is

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Grinding machine G400 (disc diameter 400 mm) - GBC ...

The grinding machine G400 is a light, powerful, compact and versatile grinder, suitable for rapidly carrying out the main process of taping and grinding of ferrules and typical manufactured items for boilers as:. back gaugingfor welding root removal; polishing of dish ends, vessels, cones, poles etc; tack – welded edges preparation by grinding; welding seam over-thickness removal

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A Short Article on Nipple as Pipe Fitting - The Process Piping

Aug 14, 2018  Pipe nipple is a fitting, consisting of a short piece of pipe, usually provided with a male pipe thread at each end, for connecting two other female threaded fittings or pipes. Close nipple, hexagonal nipple, unequal nipple, welded nipple, hose nipple.

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Acceptance Criteria for Weld Defects welding NDT

Apr 07, 2019  Acceptance Criteria for Magnetic Particle Examination (Mandatory Appendix 6): (a) Relevant linear indications shall be rejected. (b) Relevant rounded indications greater than 5 mm (3/16 in.) shall be rejected. (c) Four or more relevant rounded indications in a line separated by 1.5 mm (1/16 in.) or less (edge to edge).

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Flange Face Machining - Mechanical engineering general ...

Mar 15, 2009  Steam cutting of a raised face 1500 lb 20 inch feedwater flange set has led to grinding the raised face 1/4" below B16.5 dimensions (raised face side). System design code is B31.1. System pressure is 1250 psig and temperature is 427 deg. F. Schedule is pushing to not weld build back up. Machining will re-level face.

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Back to Basics: Sprinkler Piping Materials 2008-05-02 ...

May 02, 2008  The most commonly used steel pipe for sprinkler systems is black steel pipe. Copper tubing is another piping material listed for sprinklers in NFPA 13. Also, plastic pipe (namely, CPVC and PEX tubing) is permitted for certain types of sprinkler systems. Editor’s Note: “Back to Basics” is a column that will run periodically in PM Engineer reviewing the basic principles of plumbing ...

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Understanding Bend Tests - MCAA

Fortunately, the solution is simple — change the orientation of the weld seam so that the weld axis is perpendicular to the rolling direction (Figure 3). Figure 3: Re-orient the weld seam so that the weld ... to do this is by grinding away this excess material. Yet grinding can leave small notches that act as stress concentrators. Ideally ...

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Certification of Line-pipe for oil and gas service – AMARINE

Oct 23, 2020  Pipe lengths should be minimum 39’6” and maximum 40’6”, with the average length as near to 40’ as possible. The use of diameter tapes to measure the minimum outside diameter for pipe with a 20” OD and smaller as stated in API Specification 5L, Table 6.3, “Pipe Ends” section, is not acceptable. 24″ line-pipe out-of-roundness ...

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CHAPTER 11 CHAPTER 3 - WordPress

teachers and educators permitted by McGraw-Hill for their individual course preparation. If you are a student using this Manual, you are using it without permission. PROBLEM 11.1. The motion of a particle is defined by the relation . x t t t = - + +1 5 30 5 10. 4 2 , where . x. and . t. are expressed in meters and seconds, respectively.

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